But that's not an issue for most people. More often than not, the vitamin D levels are too low. Black and Hispanic populations are at greatest risk. If you aren't getting enough vitamin D, you might feel fatigue, muscle pain, and weakened bones. Vitamin D deficiency can also cause stunted growth in children.
Yes, we can get vitamin D from sunlight, but with more and more of us living and working inside, getting our daily dose of sun is getting harder. Getting it through your diet can be tricky — especially if you are a vegetarian or vegan because most foods containing the vitamin are animal-based. But don't despair! There are vegetarian and vegan-friendly foods that can help you increase your Vitamin D levels.
1. Mushrooms
Marko Geber / DigitalVision / Getty Images
Mushrooms are the only plant-based sources of vitamin D found in nature. They have a compound which when exposed to sunlight converts into vitamin D2. The FDA has even approved UV-treated mushrooms as an additive to other foods to increase vitamin D intake.
Of course, mushrooms typically grow in darkness, but that doesn't mean you can't boost their vitamin D levels on your own. Simply spread them out on a baking sheet and put them in the sun from 10 a.m. to 4 p.m. These D levels don't decrease when cooked, either. And the vitamin D levels have a long shelf life, too, so you can prepare them and then cook or eat them anytime.
Be careful when consuming mushrooms — especially wild ones. Not all wild mushrooms are edible and consuming poisonous mushrooms can make you sick or even kill you, so make sure you buy yours at the grocery store or trusted farmers market.
2. Fortified Cereals
Janos Mladonyiczki / EyeEm / Getty Imeages
Just because it's not found in nature, doesn't mean it doesn't exist. Many foods are fortified with vitamin D, including almost every mainstream cereal you can buy. This includes dry cereals and most oatmeal.
3. Fortified Nondairy Milks
AsiaVision / E+ / Getty Images
And what do you wash that cereal down with? Plant-based milks like almond, soy, rice and even cashew milk, are fortified with vitamin D, too. One cup can get you 10-25 percent of your daily value. Keep in mind that if the milk doesn't specifically say that it is fortified, it will have very low levels of vitamin D because the vitamin doesn't occur naturally in the substance.
4. Fortified Orange Juice
Catherine Falls Commercial / Moment / Getty Images
Not a milk fan? When it comes to orange juice, there are a lot of options. Not all are fortified with vitamin D but you can almost always find one that has both calcium and vitamin D3. It's been shown that drinking fortified orange juice can raise your D levels the same amount as if you were taking supplements. While they can provide you with 10-25 percent of your D intake, you don't want to rely on juice alone for vitamin D. It has a lot of sugar and no fiber to buffer that sucrose spike. To counteract this, consider using OJ as part of a vitamin and protein-rich smoothie.
5. Tofu
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The best thing about tofu is how versatile it is. You can include it in a variety of meals, for any time of day. Not all tofu is fortified but some can contain up to 20 percent of your daily vitamin D requirements. It also has vitamin B12 and omega 3 fats, which are also necessary for vegetarian diets. You can scramble it in the morning for breakfast, throw it in a soup or stew or curry, or spice it and toss it with rice or other plant-based dinner options.
6. Sunshine
Westend61 / Getty
You can be your own source of vitamin D! In fact, this is how most people get quite a bit of it. The National Institutes of Health says that exposure of your face, arms, legs or back for 5-30 minutes twice a week is usually enough to get proper vitamin D levels. The exposure has to be without sunscreen though, so make sure not to stay out in those rays too long.
Depending on the time of year and where you live, the UV rays from the sun vary, so keep that in mind. Another factor is the amount of melanin you have. The more you have the longer you have to expose yourself to the sun's rays to get the desired result. Because of the cancer risks, it's recommended you get some of your vitamin D from other sources.
Takeaway
Vitamin D is fat-soluble so eating it alongside fatty foods will help with its absorption. Vitamin D helps bone growth, regulates the immune system, reduces inflammation, improves mood and helps metabolize glucose in the body. It also helps your body absorb calcium and helps regulate blood pressure and cholesterol, so not having enough of it can severely impact your health.
Make sure you are getting the amount you need to have energy and good health throughout the day.
Darlena Cunha is a freelance writer and a professor at the University of Florida, with degrees in communications and ecology.
The Tesla Powerwall is arguably the best-known solar battery for homes, but does it live up to the hype? In this Tesla Powerwall review, we'll discuss the main features of this popular energy storage system and compare it with some competing battery backup devices.
What Is the Tesla Powerwall, and How Does it Work?
The Tesla Powerwall is a lithium-ion battery that's most often associated with storing energy generated by Tesla solar panels. However, you can actually charge these batteries with any electricity source to use as a backup during a power outage. You can also connect up to 10 Powerwall units as a single energy storage system, making them viable for small and medium businesses as well as homes.
You can currently purchase a Tesla Powerwall 2 or Powerwall+. The Powerwall 1 has been discontinued since 2016, but the newer versions are much better products: a single Powerwall 2 or Powerwall+ can store 13.5 kilowatt-hours of power, while the Powerwall 1 only had 6.4 kWh of usable capacity. The newer versions also have a higher power output (5.6 kW vs 3.3 kW), which means they can provide electricity for more devices at once.
The Powerwall 2 and Powerwall+ have the same storage capacity, but the Powerwall+ includes an inverter for easier integration with solar PV panels. The Powerwall+ can also deliver more kilowatts when panels are in full sunshine, while the Powerwall 2 offers the same output regardless of solar generation.
Here's a summary of Tesla Powerwall output:
- Originally, the Powerwall 2 offered 5 kW of continuous power and 7 kW of peak power.
- The Powerwall+ and later versions of the Powerwall 2 have 5.8 kW of continuous power and 10 kW of peak power.
- When solar panels are under full sunshine, the Powerwall+ reaches 7.6 kW of continuous power and 22 kW of peak power.
If you already have a home solar energy system with its own inverter, the Powerwall 2 is a great option to add energy storage without modifications. However, the Powerwall+ is easier to install with new solar panels, since there is no need to add a separate inverter. In this article, we refer to the Tesla Powerwall 2 as simply the Powerwall, since the first version is no longer available.
How Powerwall Batteries Work
All batteries store DC (direct current) power, and solar panels produce DC power. But home appliances use AC (alternating current) power. This is where inverters and rectifiers come into play.
When solar panels produce DC power, it runs through an inverter, where it's converted to AC, then flows through your house. If you have a backup power system, excess energy that's not used in the home will keep flowing to charge your battery. It will need to run through a rectifier to be converted back to DC power in order to be stored in the battery.
The Powerwall 2 and Powerwall+ both have an internal inverter and rectifier to convert electricity between AC and DC. The inverter in the Powerwall 2 is only for the battery, and an external inverter is required for solar panels. On the other hand, the Powerwall+ includes a solar inverter. Both models can also charge from the grid when solar panels are not producing electricity.
The energy stored in a Tesla Powerwall can be used at any time. However, there are certain times of the day when stored electricity is more valuable. For example, many electricity providers charge expensive peak tariffs after sunset, when homes tend to use more power. By pulling from your Powerwall instead of the grid at this time of the day, you can maximize your electricity savings.
The number of solar panels needed to fully charge a Tesla Powerwall will depend on how much sunshine you get. Consider that the Powerwall has a 90% round-trip efficiency when charging and discharging — to get the usable capacity of 13.5 kWh, you must have 15 kWh available from your solar panels.
Here's how that breaks down in a typical solar panel system:
- Assuming a solar panel capacity of 330 to 360 watts, you will need around 10 to 14 panels to generate 15 kWh of usable energy per day.
- The exact number of solar panels needed to charge a Tesla Powerwall will depend on the specific model and local sunshine conditions.
Keep in mind that your home uses some solar electricity during the day, while the Powerwall is charging. You must have enough solar panels to cover your daytime consumption and charge the battery as well.
Tesla Powerwall Specs
The Tesla Powerwall has some of the best specifications in the home battery market. There are many energy storage systems with excellent performance, but the Powerwall is among the top products in terms of storage capacity and power output.
This is in part because the batteries use a lithium nickel manganese cobalt oxide chemistry, or NMC for short. Lithium-ion batteries with NMC technology are characterized by their high power and storage capacity relative to their size.
Here's a snapshot of key Tesla Powerwall specs:
- Energy storage capacity: 13.5 kWh
- Continuous power: 5.8 kW (5 kW on earlier Powerwall 2 units)
- Peak power: 10 kW (7 kW on earlier Powerwall 2 units)
- Size: 45.3 in x 29.6 in x 5.75 in
- Weight: 251.3 pounds
- Operating temperature range: -4°F to 122°F
- Warranty: 10 years
If you have a Powerwall+ connected to solar panels or solar roof shingles, it can achieve a higher output with full sunshine. The Powerwall+ is also larger and heavier than the standard unit since it includes a solar inverter:
- Energy storage capacity: 13.5 kWh
- Continuous power with no sun: 5.8 kW
- Peak power with no sun: 10 kW
- Continuous power with full sun: 7.6 kW
- Peak power with full sun: 22 kW
- Size: 62.8 in x 29.7 in x 6.3 in
- Weight: 343.9 pounds
- Operating temperature range: -4°F to 122°F
- Warranty: 10 years
The solar inverter on the Powerwall+ has an efficiency of 97.5% and four Maximum Power Point Tracker (MPPT) circuits. This means you can group solar panels with up to four different orientations and connect each group to a different MPPT circuit to maximize power generation.
Courtesy of Tesla, Inc.
Tesla Powerwall Cost
The Tesla Powerwall has a higher price than many other battery systems, but you also get a high storage capacity and power output. The price is calculated based on how many units you order: a single Powerwall sells for $10,500, but two units will cost $17,000 ($8,500 each). They can be purchased directly from Tesla, but you can also get them from third-party providers and solar installers near you.
Powerwalls and other battery systems qualify for the 26% federal solar tax credit, which effectively reduces the price of a single unit to $7,770 (down from $10,500). However, you must meet some requirements to be eligible:
- The Powerwall must be used with solar panels (or another renewable energy system) to get credit. In other words, a stand-alone unit that only pulls charge from the grid does not qualify.
- If you're using the Powerwall in a home, it must get 100% of its charge from solar panels.
- If you're using it in a business, it must get at least 75% of its charge from solar panels.
Depending on where you live, there may be additional solar tax exemptions or other financial incentives from your state government or utility company. Before installing a Tesla Powerwall, look for information about local incentives and their eligibility requirements.
If you're interested in buying a Powerwall, there are a few additional things to keep in mind:
- Since the Powerwall has become very popular, there are often long wait times to get products in after ordering them.
- Tesla is no longer selling Powerwalls individually — they can only be purchased with new solar roof shingle or panel installations.
- If you want to add a Powerwall to an existing solar array, or you want to use solar panels and inverters from another manufacturer, you will need to contact a third-party provider.
Many top solar companies are authorized Tesla Powerwall retailers. To connect with a certified installer near you and get a free quote for a Powerwall or other installation, fill out the 30-second form below.
Is Tesla's Battery Really Better Than Competitors' Products?
Without a doubt, the Tesla Powerwall is ahead of the competition in terms of market share, and Tesla Powerwall reviews from customers consistently give the batteries high marks. However, when you compare technical specifications, there are many home batteries with excellent performance out there.
Here's how two other market-leading batteries — the Enphase Encharge 10 and the Generac PWRcell — stack up against the Powerwall:
| Tesla Powerwall | Enphase Encharge 10* | Generac PWRcell | |
|---|---|---|---|
| Price | $10,500 |
$18,000+
($6,000+ for a single Enphase 3) |
$9,999+
(modular design, price increases based on capacity) |
| Storage Capacity | 13.5 kWh |
10.08 kWh
(3.36 kWh with a single Enphase 3) |
9+ kWh |
| Continuous Power | 5.6 kW |
3.84 kW
(1.28 kW with a single Enphase 3) |
3.4+ kW |
| Warranty | 10 years | 10 years | 10 years |
| Size | 45.3 x 29.6 x 5.75 in | 42.13 x 26.14 x 12.56 in | 22 x 10 x 68 in |
| Weight | 251.3 pounds | 341 pounds | 287+ pounds |
| Monitoring | Tesla app | Enlighten Manager and MyEnlighten app | PWRview app |
*The Encharge 10 is an integrated AC system that uses three smaller Enphase 3 units.
As you can see, the Powerwall's storage capacity and continuous power output beat out the competition, as does its straightforward pricing. Lower-end batteries may save you money in the short term, but over the lifetime of your solar system, you'd be hard-pressed to find a model as cost-effective as the Powerwall.
FAQ: Tesla Powerwall
How much does a Tesla Powerwall cost?
A single Tesla Powerwall has a price of $10,500. The system price increases based on how many units are connected together (up to 10), and the price per Powerwall is lower when installing two or more.
Can a Tesla Powerwall power a home?
Yes, a Tesla Powerwall can power a home during a short-term blackout or overnight, but you will normally achieve a better return on investment by staying connected to the grid.
An on-grid Powerwall with solar panels can greatly reduce your electricity bills, covering a large part of your consumption during the day and night and pulling from your utility grid if you need more power. However, if you're planning to go off-grid, you'll need at least two (but most likely more) Powerwalls to power your home continuously when the sun isn't shining.
How long does a Tesla Powerwall last?
The Tesla Powerwall comes with a 10-year warranty, which ensures the battery will keep at least 70% of its rated storage capacity after 10 years (equivalent to 9.45 kWh). When used only for solar self-consumption and backup, the Powerwall warranty does not have a cycle limit during the warranty period.
When the Powerwall is used for other applications beyond solar self-consumption and backup, the warranty covers a battery throughput of 37.8 megawatt-hours. In other words, the warranty ends when the battery has stored and provided a total of 37,800 kWh.
Will a Tesla Powerwall save me money?
A standalone Powerwall can save money if your electricity provider charges time-of-use prices. You can charge the Powerwall when grid electricity is cheap, and you can use it when grid electricity is expensive. If your utility company has demand charges, you can also use the Powerwall to cut the peak demand measured by the power meter, and this will be reflected as a lower demand charge on your next bill.
A Powerwall with solar panels or roof shingles can achieve greater savings, as it charges locally with solar power. Instead of exporting your surplus generation to the grid, you can store that energy in the Powerwall and use it when its value is higher. Like in the previous case, you can use the Powerwall to avoid peak tariffs or reduce demand charges.
Leonardo David is an electromechanical engineer, MBA, energy consultant and technical writer. His energy-efficiency and solar consulting experience covers sectors including banking, textile manufacturing, plastics processing, pharmaceutics, education, food processing, fast food, real estate and retail. He has also been writing articles about energy and engineering topics since 2015.
Hurricane Ida's storm surge left the multiple-ton vaults strewn around the town, "like they were cardboard boxes," Rev. Haywood Johnson Jr. told the AP. The lingering coffins are a visceral illustration of the trauma and abandonment of small communities like Ironton after the massive storm. "Once you bury a relative, you expect that to be the permanent resting place," Rev. Johnson lamented.
Louisiana recovering the dead after Hurricane Ida. youtu.be
As reported by The Associated Press:
Families sometimes strap down graves or use sandbags to keep them in place ahead of a storm, said Arbie Goings, a task force member who is also a retired funeral director. When they do get displaced, identifying remains can be challenging, especially in cases of long dead people with fewer, if any, ways to match things like dental records or DNA.
Some caskets have a little plastic tube — called a memory tube — screwed into its end where a funeral home can put identifying information, Goings said. In some cases, they've found the name at the foot of the casket or embroidered into a piece of cloth covering the bottom part of the person, he said.
Often family members can give key identifying details. He recalled one case where they identified a woman's remains by the marbles her grandchildren put in her casket in honor of her love of the game.
A Louisiana resident whose loved ones' burial site was disturbed in the wake of Hurricane Ida. Roby Chavez / PBS NewsHour
For a deeper dive:
AP; Climate Signals background: 2021 Atlantic hurricane season, Storm surge increase
For more climate change and clean energy news, you can follow Climate Nexus on Twitter and Facebook, sign up for daily Hot News, and visit their news site, Nexus Media News.
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