An increasing number of large solar parks are being built across the globe to help solve the planet's energy needs.
Just how cheap is solar electricity?
Production costs for solar energy have dropped by 90% between 2009 and 2020, according to US investment bank Lazard.
In 2020, electricity from large-scale solar plants cost a global average of just $0.037/kWh. By comparison, the costs of generating electricity from new coal-powered plants was three times that at $0.112/kWh, while natural gas cost $0.059, nuclear $0.163, and wind $0.04/kWh.
"We're going to see solar power plants all over the world. It's the cheapest energy source in the world, with a few exceptions. In some places, wind power is still a bit cheaper," said Christian Breyer, a professor of solar economy at LUT University in Finland.
With large solar farms, Breyer says, production costs can be as low as $0.01 in locations with lots of sunlight, and up to $0.04 elsewhere. He and other experts expect that new and more efficient solar panels will lower costs even more, by 5 to 10% per year.
How big are large solar farms?
The world's largest solar parks have a capacity of 2,000 - 2,200 megawatts (MW), most are located in desert regions in China, India, and the Middle East, Egypt being a prime example. There are also big plants with over 500 MW in the US, Mexico, and southern Europe.
One of the largest solar parks, known as Al Dhafra PV2, is scheduled to begin supplying the United Arab Emirates' national energy provider beginning next year. Under construction to the tune of $1 billion, the 2,000 MW plant will be comprised of four million modules installed over an area of 20 square kilometers near the capital, Abu Dhabi.
Most other solar parks around the world are smaller than the giant facilities in the desert. Germany's largest solar park, for example, located in Weesow near Berlin, has an output of just 187 MW. Its 465,000 solar modules supply the electricity needs of about 50,000 households.
But even in densely populated countries like Germany, larger plants with a capacity of several thousand megawatts are conceivable. One place where they could be built are the quarries of abandoned open-cast lignite mines.
Where is solar power worthwhile for industry?
Globally, the industrial sector requires lots of energy. In Germany for instance it consumes about half of all electricity generated. To save costs, companies are turning to photovoltaics. International mining companies for instance have started replacing diesel power with solar power in remote locations. And more and more chemical companies, aluminum plants, car factories, cement manufacturers, and data centers are getting their power from solar farms.
One example is Facebook's data center in the state of Tennessee, located in the southeastern US, which will get about 110 MW of electricity from a solar park with a capacity of 150 MW. The park is being built and operated by the German power company RWE.
Another example: starting in 2022, several Bayer Group's chemical plants will run on 100% green electricity from a 590 MW-solar power plant in southern Spain.
The energy-intensive steel industry is also reorienting itself. Low-cost solar power is in demand there, as is "green" hydrogen generated by solar and wind power, which is needed for the blast furnace process. Low-cost energy supply is a decisive factor when planning the location of new steel mills.
Solar power is even proving to be worth the investment in regions with less exposure to the sun's rays. One example is Poland's largest solar park in Witnica, which has a capacity of 65 MW. It supplies the neighboring cement plant.
"This is the best proof that solar power, without any subsidies, can be competitive with power from conventional energy sources. Even in a European country as far north as Poland," says Benedikt Ortmann from power plant operator BayWa r.e.
Where should we build solar power plants?
Experts estimate that in the near future, photovoltaic plants with a total capacity of around 60 million MW will be needed to supply the entire world with cost-effective electricity. That's 70 times more than all the existing solar capacity so far.
The area required for solar panels would then be equivalent to 0.3% of the world's land area.
"On a global average, you don't have to worry about land availability," said Christian Breyer of LTU Finland. But if the energy is to be generated as close as possible to cities and large factories, he says, it's a bit more tricky, especially in densely populated regions.
One solution would be to use roofs and facades. According to Breyer, some 20% of the world's solar power demand could be generated there.
So-called agrivoltaics, with solar roofs installed above fields, are also becoming increasingly important.
Another option: building solar panels that float on water. According to a World Bank study, the global potential of floating PV is 400,000 MW even if only one percent of the area of reservoirs is used for this purpose.
So far, the largest solar plants on inland lakes have been built in China, India, South Korea, and Taiwan. There are also smaller plants on lakes and reservoirs in many other countries, including the Netherlands, Israel and Indonesia. India is currently planning a large-scale floating plant with 1000 MW.
Meanwhile, research is underway in the Netherlands to find solutions for installing floating solar farms in the rough North Sea to povide energy for the national grid. But salt water, strong currents and winds still pose huge challenges.
Smaller floating facilities in offshore waters already exist, such as in the Maldives, where they provide electricity to vacation islands.
This article was adapted from German.
Reposted with permission from Deutsch Welle.
5 Best Solar Pool Heaters
As you seek the best solar water heater for your pool, there are a number of factors to consider, including system size, durability, heating strength and overall value. We've reviewed a number of the best solar pool heaters according to these and other criteria. Here are our picks for the best of the best:
|
Best Solar Pool Heater |
Our Award |
Above Ground |
In-Ground |
Buy Now |
|
SunQuest Solar Swimming Pool Heater |
Best Overall |
✓ |
✓ |
|
|
Fafco Pool Papa Bear Economy Heating System |
Best for Above-Ground Pools |
✓ |
||
|
SunHeater S120U Universal Solar Pool Heater |
Best Installation Process |
✓ |
✓ |
|
|
SmartPool S601 Pool Solar Heater |
Best for In-Ground Pools |
✓ |
||
|
Sun2Solar Blue Solar Cover |
Best Solar Pool Cover |
✓ |
✓ |
Each product featured here has been independently selected by the writer. If you make a purchase using the links included, we may earn commission.
Best Overall: SunQuest Solar Swimming Pool Heater
We consider SunQuest's solar swimming pool heater to be top-of-the-line. It's notable for its superior technology, dependable performance and incredible heating efficiency. SunQuest uses professional-grade solar panels to keep your pool nice and warm, circulating water through the panels to ensure a consistent temperature. The SunQuest solar panel kit works with your existing water pump and is available in packages that include connectors, diverters and roof mounting hardware so you have all of the materials you need for easy installation. In fact, customer reviews show this is one of the simplest solar pool heaters to set up, even if you're a solar panel installation novice.
Pros:
- Professional-grade solar panels ensure optimal water heating
- Well-reviewed for its reliability and consistency
- Easy to install
- Great value
- Works for both in-ground and above-ground swimming pools
Cons:
- You may need to invest in multiple panels, especially for larger pools
Why Buy: SunQuest sets a high bar for technology, heating efficiency, ease of use and overall value. It should be on anyone's list of top solar pool heater panels.
Best for Above-Ground Pools: Fafco Pool Papa Bear Economy Heating System
Looking for the best solar pool heater for an above-ground pool? Check out this model from Fafco. (Just to be clear, it does not work with in-ground pools.) You can mount the 24-foot Papa Bear, or the shorter 20-foot Fafco Solar Bear, on your roof, on a nearby rack or even on the ground. Fafco's units collect solar heat and use it to warm water that's pumped through a flexible panel. This water flow allows you to keep the temperature of your pool consistent using only solar power.
Pros:
- A great option for anyone with an above-ground pool
- Lots of installation options so you can get maximum exposure to the sun's rays
- Easy to install
Cons:
- Not viable for in-ground pools
- If you install it on the ground or on a rack, you'll need adequate surface area to fit the whole system
Why Buy: If you're looking for the best solar pool heater that's tailor-made for above-ground use, this is your best option by far. If you need an in-ground pool heater, you'll want to keep searching.
Best Installation Process: SunHeater S120U Universal Solar Pool Heater
It's understandable to feel daunted by the prospect of installing your own solar pool heater. The SunHeater solar heating system makes the process as easy as can be. Whether you're installing it beside an in-ground pool, above-ground pool, on your roof or on a rack, this is a very straightforward DIY solar panel system. It also makes use of your existing pool pump, which helps keep the price point relatively low.
Pros:
- Very basic DIY installation
- Works for any kind of pool
- Very efficient in its heating ability, even for large pools
Cons:
- May not be quite as durable or as long-lasting as others on this list
Why Buy: If you find the prospect of solar installation to be a little bit intimidating, this is a good, basic solar pool heating system to consider.
Best for In-Ground Pools: SmartPool S601 Pool Solar Heater
For a reliable in-ground solar pool heater, SmartPool's S601 is the one to beat. (But note that it doesn't work for above-ground pools.) What impresses most is the system capacity; you'll get 80 square feet of solar paneling, providing direct heat to your pool water. You can raise your water temperature by up to 10 degrees with this unit, which is often all the difference you need.
Pros:
- Powerful system with ample heating capacity
- A great option for in-ground swimming pools
Cons:
- You'll need to buy the installation kit separately
- Doesn't work for above-ground pools
Why Buy: If you're looking for direct heat for your in-ground swimming pool, SmartPool has you covered. Just be aware that the installation kit needs to be purchased on its own.
Best Solar Pool Cover: Sun2Solar Blue Solar Cover
Here's something a little different: Instead of a solar panel heating system, the Sun2Solar pool cover is more like a solar blanket. It attracts and retains solar energy, heating your pool and helping combat water evaporation. It's a cost-effective way to make your swimming pool a bit more comfortable, and it works with above-ground and in-ground pools alike. One nice part about the design is that it can be trimmed to the exact size of your pool, so it fits nearly all pool types.
Pros:
- Affordable alternative to a full solar pool heater
- Retains heat and also minimizes evaporation
- Can fit to any pool size
- Stylish appearance
Cons:
- Won't offer the same amount of heat as one of the best solar panel pool heaters
Why Buy: If you're not yet ready to install a full solar pool heater system, this heat-retaining cover is a good place to start.
How Do Solar Pool Heater Panels Work?
As you consider installing one of the best solar pool heater systems, it's important to understand that they work a bit differently than your typical home solar system. Generally speaking, when you buy solar panels for your home, they harness the sun's energy and use an inverter to convert the energy into useful electrical current, which is distributed to your home energy panel.
A solar pool heater uses panels to collect the sun's energy as well, but instead of having that current flow to a mechanism in your pool, the pool water is circulated through the solar collection area, ensuring a consistent warming effect. That water is then pumped back into the pool through a hose and a flow control valve. Your panels' sun exposure will determine how warm your pool water can get.
Types of Solar Pool Heaters
One thing to keep in mind is that, like there are multiple types of solar panels, there are multiple types of solar pool heaters. These include flat plate collectors, evacuated tube collectors and batch collectors. Here's an overview:
- Flat plate collectors have copper tubes connected to flat plate absorbers. They are usually made to fit about 40 gallons of water at a time.
- Evacuated tube collectors use glass or metal heating tubes, which essentially function like a thermos would.
- Batch collectors heat and store water in dark tanks or tubes. Water is distributed on demand.
Generally speaking, evacuated tube collectors are the most efficient option. They are also better suited for colder climates. Flat plate collectors are a bit more prone to ambient heat loss, while batch collectors are not compatible with closed-circuit systems.
How Much Does a Solar Pool Heater Cost?
As you shop for the best solar pool heater, it's only natural to wonder about costs. The price point for solar pool heaters can vary considerably, according to a number of different factors, including size, performance, efficiency, materials and more.
When browsing the different options, you'll notice a wide spectrum: You can get a simple heat-retaining cover for as low as $200, whereas a full, professionally installed system may cost $4,000 or more.
Choosing the Best Solar Pool Heater for Your Home
When considering the best solar pool heater for your home, there are a number of factors to keep in mind.
- Design and size: Do the panels have to go on the roof, or can they be assembled on a rack or on the ground? Is a cover included to help retain heat? Make sure you think about how much space the system will require as well, and look for special features like a temperature sensor, which can help you get the most out of your system.
- Installation process: Can you install the system on your own, or will you need to hire a pro? Is a full installation kit included, or will you need to buy parts that are sold separately?
- Budget: Naturally, the cost of solar panels is going to be a big factor when seeking the best solar pool heater for your home.
- Durability and warranty: Always look for a system that is made with high-quality materials, ensuring its longevity. And make note of any warranties that are included, which can increase your peace of mind.
Each product featured here has been independently selected by the writer. If you make a purchase using the links included, we may earn commission.
How Much Do Solar Panels Cost to Install?
To begin with, let's take a look at the basic price range for solar panel installation. According to the most recent U.S. Solar Market Insight report, in the first quarter of 2021, the national average price of a residential solar system was $2.94 per watt, which would mean a 5 kWh system would cost $14,700 and a 10 kWh system would cost $29,400.
The exact price you'll pay for solar panels will depend on a number of factors, including your geographic location, the size of your home and more.
Now, you might rightly wonder: What exactly are you paying for? The solar panels themselves usually make up just about a quarter of the total cost. Remaining expenses include labor, maintenance and additional parts and components (such as inverters).
What Factors Determine Solar Pricing?
As mentioned, there are a few key things that can lead to variation in solar system installation costs. Analyzing these can help you determine whether solar panels are worth it for your home. Let's take a look at them in greater detail.
Your Electrical Needs
The solar panels themselves will be rated for a particular wattage, which reflects the amount of energy they can absorb for storage and ultimately for power generation. You will actually pay according to wattage, which means that the greater your household energy needs, the more you'll have to spend to get the correct number of solar panels.
So, how do you determine how much energy you need for your home? The best way to figure this out is through a consultation with a solar installer. (We recommend shopping smart by requesting free consultations with two or three top solar companies in your area.)
Your installer will evaluate your home energy needs based on total square footage, the number of people who live in your home, the number of appliances and power-draining devices that you have connected and more. It can then recommend the ideal solar panel system size to accommodate your energy usage.
Type of Panels and Other Components
Variation in manufacturing can also affect the cost of solar panels. There are three basic types of solar panels, two of which are commonly used residentially: monocrystalline and polycrystalline panels. Of these two, monocrystalline options tend to be more energy-efficient and thus may provide you with greater savings in the long run. They are also a bit pricier on the front end. With that said, homeowners with a smaller roof surface area may benefit from getting the most efficient solar panels, even if the initial cost is a bit steeper.
Other components you'll need to purchase include inverters, wiring, charge controllers, mounts and more. The quality of these materials can affect your total solar system cost. For example, if you spring for the best solar batteries, they may add a few thousand dollars to your investment.
Geographic Location
Another factor that can have a big impact on solar pricing? Your geographic area. Solar installation tends to be most cost-effective in parts of the country that get a lot of sun exposure, and thus a lot of photovoltaic light. This basically means that solar panels can operate more efficiently, and in many cases means that fewer total panels are needed. Those who live in states like California, Florida and Arizona — or really any areas of the Sun Belt or Southwest — will likely get the most out of their home solar power systems.
Tax Incentives
Both state and federal governments have established incentive programs to encourage homeowners to buy solar panels. There is currently a 26% federal solar tax credit, called an Investment Tax Credit (ITC), available for homeowners who install residential solar panels between 2020 and 2022. It is scheduled to reduce to 22% in 2023 and may not be extended thereafter.
Local incentives vary by state, but most of the best solar panel installers will help you identify and apply for these programs so you don't miss out on savings.
Additional Factors
There are plenty of other factors that can impact solar panel installation costs. Different vendors are going to offer different levels of customization, expertise and consumer protections (including guarantees and warranties). The bottom line? It is wise to shop around a bit, determine the average cost of solar panels in your area and evaluate the value of services offered by a few solar installation companies.
Solar Panel Price Vs. Return on Investment
Clearly, your upfront solar panel installation cost may be a little steep. Now, let's look at the flipside: How much money will you actually save? And will your energy savings be enough to offset the initial cost of your solar energy system?
It is not unreasonable to think that you can cut your monthly utility bills by as much as 75% or more by switching to solar energy. Of course, the specific dollar amount will depend on where you live, the size of your home and the number of people in your household.
One way to look at it: The average household energy bill is somewhere between $100 and $200 monthly. It would probably take about 15 years for your energy savings to cancel out the cost of solar panel installation. In other words, within a decade and a half or so, your solar system might pay for itself. Factor in savings from tax rebates and other incentives, and most solar systems pay for themselves in closer to seven or eight years.
Note that most solar energy companies offer free solar calculators, which help you arrive at a ballpark for monthly energy savings. While these calculators are imprecise, they can certainly give you a general sense of the financial benefits you will experience when you convert to solar energy.
Free Quote: See How Much You Can Save on Solar Panels
Fill out this 30-second form to get a quote from one of the best solar energy companies in your area. You could save up to $2,500 each year on your electric bills and receive tax rebates.
Frequently Asked Questions About the Cost of Solar Panels
As you continue to weigh the pros and cons of solar energy, it's natural to have a few questions. The best way to resolve these is really to set up a solar consultation with a local expert, but in the meantime, here are a few general answers to some of the most common solar inquiries.
How much will it cost to maintain my solar energy system?
In general, solar systems are designed to run smoothly for decades without requiring any maintenance or upkeep. As such, you should not really need to factor maintenance into the equation for the first 20 years or so after you install your system. (And most solar companies will offer you warranties and guarantees to give peace of mind on this front.)
How will solar energy impact my property values?
Many homeowners want to know how going solar will impact the value of their homes. Going solar increases property values. In fact, the U.S. Department of Energy has reported buyers are willing to pay an average premium of about $15,000 for a home with a solar panel system. With that said, you are only going to see your property values go up if you own your solar system outright, as opposed to leasing it.
How can I finance the cost of solar panels?
Different solar installers may offer different financing plans, allowing consumers some flexibility. With that said, there are three basic options for paying for your solar energy system:
- Purchase your solar energy system outright (that is, pay in cash).
- Take out a solar loan to purchase the system, then pay it back with interest.
- Lease your system; you will pay less month-to-month but won't actually own the system yourself.
Which is better, buying or leasing my solar system?
It all depends on your motivation for going solar. If you want to maximize long-term savings and increase the value of your home, then purchasing your solar system is usually best. However, if you just want a low-maintenance way to reduce monthly energy costs and practice environmental stewardship, then leasing might be a better option. Also note that leasing can be a good option for those who do not plan on being in their home for exceptionally long.
How can I be sure my roof will accommodate a solar system?
If your roof faces south, has ample space and has little to no shade cover, it should work just fine. Even roofs that are not optimal can still be utilized with a few tweaks and adjustments. Your solar energy consultant will advise you on whether your home is a good fit for solar energy.
How long will my solar energy system last?
Solar systems are designed to be exceptionally durable. With just the most basic upkeep, most solar energy systems should continue to work and produce power for anywhere from 25 to 35 years.
Make the Best Choice About Solar Energy
Solar energy is not right for every homeowner, nor for every home. With that said, many homeowners will find that the initial cost of solar panels is more than offset by the long-term, recurring energy savings. Make sure you factor in cost, energy needs, tax incentives, home value and more as you seek to make a fully informed decision about whether to embrace solar power.
As a recreational surfer and physical oceanographer, I spend a lot of time thinking about waves. But for many people, this year's Olympics will be their first time watching the sport. They might be wondering:
What generates the waves that surfers will ride at the Olympics? Where do the waves come from? And why will the new Olympians be surfing at Tsurigasaki Beach?
Winds create waves that organize into an evenly spaced swell before breaking on shore. Jon Bowen/Flickr, CC BY-NC-ND
Wind Creates Waves
Think for a few seconds about what happens when you throw a stone into a serene pond. It creates a ring of waves – depressions and elevations of the water's surface – that spread out from the center.
Waves in the ocean act similarly by propagating outward from where they are generated. The key difference is that the vast majority of ocean waves are formed by wind. As the wind blows over the surface of the water, some of the energy of the wind is transferred into the water, creating waves. The biggest and most powerful wind-generated waves are produced by strong storms that blow for a sustained period of time over a large area of the ocean.
The waves within a storm are usually messy and chaotic, but as they move away from the storm they grow more organized as faster waves outrun slower waves. This organization of the waves creates “swell," or regularly spaced lines of waves.
Surfers will be competing at Tsurigasaki Beach on the east coast of Japan, where the waves break on sandbars. Pullwell / WikimediaCommons, CC BY-SA
Seafloors Break Waves
As waves travel across the ocean, they don't actually bring water with them – a wave from a storm 1,000 miles away isn't made of water from 1,000 miles away. Waves are actually just energy moving from water molecule to water molecule. This energy doesn't just move through the top layer of the ocean, either. Ocean waves extend far below the surface, sometimes as deep as 500 feet. When waves move into shallower water close to shore, they start to “feel" the seafloor as it pulls and drags on them, slowing them down. As seafloor gets shallower, it pushes upwards against the bottoms of waves, but the energy has to go somewhere, so the waves grow taller.
As the waves move toward shore, the water gets ever more shallow and the waves keep growing until, eventually, they become unstable and the wave “breaks" as the crest spills over toward shore.
It is only here, after a wave has traveled perhaps thousands of miles, that the surfing starts. To catch a wave, a surfer paddles toward shore until their speed matches that of the wave. As soon as the wave starts to break, the surfer stands up quickly and maneuvers the surf board with their feet and weight to ride the wave just ahead of the crashing lip.
This map shows the tracks of all the tropical storms, typhoons and hurricanes that formed from 1945 to 2006. Note the hot spot of frequent, powerful storms south of Japan. Citynoise / WikimediaCommons, CC BY-SA
Waves at the Olympics
The waves that surfers ride at Tsurigasaki Beach for the Olympics will be generated from one of two different types of wind: trade winds and typhoons.
Trade winds consistently blow around 11 to 15 mph (18 to 24 kph) in a band that stretches across the Pacific Ocean from approximately Mexico to the Philippines. These winds generate small “trade swells" that propagate northward toward the east coast of Japan and are usually a few feet tall when they arrive.
But if the surfers and spectators are lucky, a typhoon with wind speeds greater than 74 mph (119 kph) will be supplying powerful waves for the event. Typhoons are what hurricanes are called in much of Asia and are common near Japan and China during summer and fall. Winds in a typhoon are much stronger than the trade winds. Therefore, they generate much bigger waves. Olympic surfers obviously do not want a typhoon to hit Japan. What they want is for a typhoon to form about 500 to 1,500 miles (800 to 2,400 km) to the southeast of Japan and generate big waves that will hit the coast of Japan after traveling across the ocean for one to three days.
Based on the current weather and surf forecasts, it looks like just such a situation will happen. As of July 22, 2021, weather models are predicting that a tropical cyclone or typhoon will almost certainly develop to the southeast of Japan over the next few days, and the winds from this storm will send a powerful swell to the Olympics. Currently, models are predicting that the waves could be 7 feet (2.1 m) at Tsurigasaki Beach, just in time for the surfing event to start.
Once the swell from the trade winds or a far-off typhoon reaches Tsurigasaki Beach, it is the seafloor that will determine where the waves break. Tsurigasaki Beach is a “beach break," which means that the seafloor is sand, rather than rocks or coral reef. There are a series of human-made rock walls, called groins, sticking out perpendicularly from the beach. These have been engineered to prevent sand from moving along the beach and are meant to slow erosion. These groins create shallow sandbars a few hundred yards from shore that incoming waves will break on. This is where the athletes will surf.
When you tune in to watch the surfing competition at the Olympics, marvel at the amazing skills of elite surfers, but remember too the far-off storms and the underwater sandbars that come together to create the beautiful waves.
Portions of this article originally appeared in an article published on Dec. 3, 2020.
Sally Warner is an assistant professor of climate science at Brandeis University.
Disclosure statement: Sally Warner does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond their academic appointment.
Reposted with permission from The Conversation.
5 Best Solar Panels for RV Use
To help you make an informed purchasing decision, we've evaluated many of the best solar panels for RV camping, rating them according to durability, performance, efficiency, cost and other factors. We've determined that these are the five best options when it comes to solar panels for an RV roof:
|
Best Solar Panels for RV Use |
Our Award |
Buy Now |
|
Renogy 400W 12-Volt Monocrystalline Solar RV Kit |
Best Overall |
|
|
WindyNation 100W Solar Panel Off-Grid RV Kit |
Best Basic Kit |
|
|
Renogy 100W 12-Volt Flexible Monocrystalline Solar Panel |
Best Flexible Panel |
|
|
Goal Zero Nomad 100-Watt Monocrystalline Portable Solar Panel |
Best Portable Panel |
|
|
Renogy 100W 12-Volt Monocrystalline Solar Starter Kit |
Best Kit Under $200 |
Each product featured here has been independently selected by the writer. If you make a purchase using the links included, we may earn commission.
Here is a quick overview of each product.
Best Overall: Renogy 400W 12-Volt Monocrystalline Solar RV Kit
The Renogy 400W 12-Volt Monocrystalline Solar RV Kit is our choice for all-around best solar panels for RV use. The kit provides you with four 100-watt panels and comes with an efficiency rating of 21%. This is one of the most efficient solar panels for RVs; in fact, there are a lot of residential solar systems out there that don't provide as much power. And Renogy backs its solar panel kit with a 25-year warranty, generous consumer protection that speaks to the durability of these panels.
Something else to note is that the kit comes with all of the mounting hardware and cables you need to install the panels on your RV's roof, as well as easy app integration that allows you to control your solar energy panels from your phone or tablet.
Pros:
- Industry-leading efficiency
- Great value, including a heavy-duty 25-year warranty
- Lots of options for easy, customizable solar panel installation
Cons:
- It's a fairly large system, and smaller RVs won't have the roof space for four solar panels
Why Buy: Optimizing performance and value, Renogy's solar power kit is the one to beat, especially for mid-sized or large campers.
Best Basic Kit: WindyNation 100W Solar Panel Off-Grid RV Kit
If you're looking for something a bit more basic (and a bit less expensive), you might consider this WindyNation kit. It comes with a single 100W solar panel, plus everything you'll need for a quick and easy installation.
If you don't need a ton of electrical power, this single solar panel system should more than accommodate. A nice thing about this RV solar panel kit is that if you find the power output is lower than you need, you can always expand your solar setup with additional panels.
Pros:
- Comes with all the solar cable and mounting equipment you need
- Easily expandable if you need a higher amount of power
- Great basic option for small campers or for solar novices
- Decent price point
Cons:
- For some RV campers, this simply won't offer enough on-the-go power
- Inverter needs to be purchased separately
Why Buy: If you're looking for a modest solar power system for RV use, WindyNation is a great brand with a stalwart reputation. And if you like the system but need more wattage, it's pretty easy to add additional panels.
Best Flexible Panel: Renogy 100W 12-Volt Flexible Monocrystalline Solar Panel
What if you need a solar power system that can be installed on irregular surfaces, like the hood of an Airstream? Renogy's flexible solar panels are up to the task. This 100W panel is not only extremely durable and able to withstand high winds and heavy snow loads, but it's also backed by the same robust warranty and rock-solid reputation that make Renogy's other products so recommendable.
Pros:
- Lightweight, flexible, portable and great for use on irregular surfaces
- Comes with a solid warranty
Cons:
- Will not provide enough power for a full-sized RV
- Standalone panel does not come with cables, solar charge controller, adaptor kit, battery bank, inverter, or the adhesive you'll need for DIY solar panel installation
Why Buy: Not everyone needs flexibility in their RV solar paneling. But if you do, this Renogy product is one of the best solar panels for RV roofs that aren't standard.
Best Portable Kit: Goal Zero Nomad 100-Watt Monocrystalline Portable Solar Panel
Some owners may not want to go to the trouble of installing solar panels on their RV, instead preferring to simply hook up a foldable solar panel for powering their air conditioner or small appliance chargers. The Goal Zero Nomad 100-Watt Monocrystalline Portable Solar Panel is our choice for best portable solar panel kit.
We love it for its ruggedness and durability, lightweight nature, portability and incredible ease of use. You can also chain it with other solar panels, meaning it's a simple way to augment your existing RV solar system.
Pros:
- Easy to transport
- Easy to chain with other solar panels
- Reasonable price point
- Built-in carrying case for easy portability
Cons:
- Warranty information is unclear
Why Buy: If you want a solar panel you can take anywhere, unfolding whenever it's needed, then we can't recommend this product highly enough.
Best Kit Under $200: Renogy 100W 12-Volt Monocrystalline Solar Starter Kit
In terms of sheer affordability, the Renogy 100W 12-Volt Monocrystalline Solar Starter Kit is one of the best solar power systems for RV use. For under $200, you get a Renogy 100-watt panel along with a charge controller, tray cables, adaptor kit and z-brackets for easy mounting. And while a single panel likely won't be enough to power your entire motorhome, this does boast Renogy's 21% efficiency level, which is nothing to scoff at.
Pros:
- Especially low price point
- High efficiency rating
- Easy installation
Cons:
- Likely not enough power for your entire full-size RV
Why Buy: If you're looking for an affordable entry into RV solar systems, this is a great place to begin.
How Do RV Solar Panels Work?
As you shop for the best solar panels for your RV, it may be helpful to know how solar panels actually work.
Generally speaking, a solar power system for an RV works like a residential solar system. The panels draw energy from the sun and an inverter turns it into an electrical current, which is then distributed throughout your RV's electrical system. A battery may be used to store any excess power that's generated by the solar cells so that you can still power your system on low-light days or at night.
Types of RV Solar Panels
There are three basic types of solar panels for RVs: monocrystalline, polycrystalline and thin-film solar panels.
Monocrystalline and polycrystalline solar panels are both made from silicon. The difference is that monocrystalline panels are made with a single, unbroken silicon crystal, while polycrystalline panels are pieced together from silicon fragments. As such, monocrystalline panels tend to be a bit more efficient, but also quite a bit more expensive.
Thin-film panels can be made from a number of different materials. They're the least expensive option, and also the least efficient. One big plus is that they tend to be more lightweight, flexible and portable, which makes thin-film solar panels well-suited for RV use.
Types of Batteries for RV Solar Systems
Battery banks are an important component of an RV solar power system. Most RVs will only need a 12V battery, but some owners may opt for higher voltage depending on what needs to be powered.
You'll also need to choose between lead-acid batteries and lithium-ion batteries. While lead-acid batteries are a common choice, they typically need to be replaced and maintained more frequently than lithium-ion ones. If you camp most of the year, springing for the more efficient, longer-lasting lithium-ion batteries is probably a good idea.
How Much Do RV Solar Panels Cost?
The cost of an RV solar system can vary according to a number of different factors: Size, type of panels, number of panels and more. If you want the best RV solar panels, it may not be cheap. Although you can get a single, high-quality panel for under $200, a full, professionally installed system may total more than $2,000.
Keep in mind that the price point can also fluctuate depending on accessories you acquire, like extra panels, batteries, mounting equipment and more.
Choosing the Best Solar Panels for Your RV
Ultimately, there are a number of factors to consider when choosing the best solar panels for your RV. Primary considerations include:
- System size: You'll need to think about the number of appliances and accessories that need to be powered, as well as the size of your RV and the total surface area that's available for solar paneling. Also, consider the number of nights you'll be staying at a designated campground with a power hookup versus off-grid boondocking.
- Installation process: Ease of installation is another important point: Will you be able to install your panels yourself, or will you require a professional? And will you need to buy additional parts or accessories before your solar panels can be used? Look out for features like pre-drilled holes that fit specific mounting brackets.
- Budget: The cost of solar panels is always a driver when seeking the best system for your setup. You may need to spend a little more if you plan on using your panels as the primary power source for a full-size RV, as a low-watt solar kit will likely not put out enough energy.
- Durability and warranty: Always seek high-quality materials and robust warranties when you buy solar panels, as these can provide you with some peace of mind about the longevity of your solar panels. A corrosion-resistant aluminum frame and a highly rated junction box are sure to hold up long-term, for example.
Final Thoughts: Is an RV Solar Power System Right for You?
After learning more about mobile solar systems, it's time to decide: Are solar panels worth it for your RV camper?
Solar can be a great option if you consistently camp at sites that have electric hook-ups and you wish to reduce your environmental footprint. They can be an even wiser investment if you frequently camp where you don't have access to the power grid. Make sure you do your due diligence, finding the best solar panels for your RV, your budget and your camping lifestyle.
The fire, which was allegedly started on Sept. 5, 2020, surged across 2 counties, destroying five homes,15 buildings, injuring 13 people, and took the life of a firefighter, Charlie Morton, according to The Guardian and The Washington Post.
"Obviously, he wouldn't have been out there if this [fire] hadn't started in the first place," San Bernadino County District Attorney Jason Anderson said of Morton at a news conference on Tuesday, according to The New York Times. "He's fighting a fire that was started because of a smoke bomb. That's the only reason he's there."
Morton was one of more than 1,350 firefighters who tried to quench the flames, according to The Washington Post. The fire blazed for 23 days and took the efforts of at least six fire departments to stop it.
A photograph of fallen Big Bear Interagency Hotshot Charles Morton, a firefighter who was killed battling the El Dorado wildfire, is displayed at a memorial service for Morton on Sept. 25, 2020 in San Bernardino, California. Mario Tama / Getty Images
In addition to one count each of involuntary manslaughter, Refugio Manuel Jimenez Jr. and Angela Renee Jimenez are also facing three felony counts of recklessly causing a fire with great bodily harm, and four felony counts of recklessly causing a fire to inhabited structures and 22 other misdemeanor counts, according to The New York Times.
"You're obviously dealing with lost lives, you're dealing with injured lives, and you're dealing with people's residences that were burned and their land that was burned," Anderson said at the news conference according to CNN. "That encompasses a lot of, not only emotion but damage, both financially and psychologically."
The southern California couple pleaded not guilty to the charges and were released without having to post bail, according to The New York Times.
This is not the only disaster connected to gender-reveal parties, where parents announce the sex of their unborn child. This type of event has led to a fatal plane crash, partygoers' deaths, other wildfires and brushfires, and a massive explosion in New Hampshire, according to the Washington Post.
Additionally, around half of Western wildfires in the U.S. are started by people, from things like downed power lines, cigarettes, and untended campfires, while the other half of fires are caused by lightning, according to The New York Times.
The Jimenzes could face several years in prison if they're convicted, Anderson said, according to The New York Times.
Audrey Nakagawa is the content creator intern at EcoWatch. She is a senior at James Madison University studying Media, Art, and Design, with a concentration in journalism. She's a reporter for The Breeze in the culture section and writes features on Harrisonburg artists, album reviews, and topics related to mental health and the environment. She was also a contributor for Virginia Reports where she reported on the impact that COVID-19 had on college students.