On Monday, the mayors of London, Paris, Los Angeles, Copenhagen, Barcelona, Quito, Vancouver, Mexico City, Milan, Seattle, Auckland and Cape Town committed to a series of ambitious targets to make their cities greener, healthier and more prosperous. By signing the C40 Fossil-Fuel-Free Streets Declaration, the pioneering city leaders pledged to procure only zero-emission buses from 2025 and ensure that a major area of their city is zero emission by 2030. The policies are designed to fight air pollution, improve the quality of life for all citizens and help tackle the global threat of climate change.
EcoWatch Daily Newsletter
By Mike Gaworecki
The eleven-year-old C40 Cities Climate Leadership Group brings together officials from 85 of the world's great cities that collectively represent one quarter of the global economy. The group's focus is spurring urban initiatives that reduce greenhouse gas emissions while increasing the health, well-being and economic opportunity of the more 650 million people who call those 85 cities home.
Sponsored by Bloomberg Philanthropies and Chinese green-tech developer BYD, the C40 Cities Awards recognized the "best and boldest" work being done by mayors to fight climate change and protect their constituents from climate risks.
"The winning projects show that great progress is being made on every continent, and they serve as an inspiration to other cities," C40 President of the Board and U.N. Secretary General's Special Envoy for Cities and Climate Change Michael R. Bloomberg said in a statement. "They also show how cities can help the world meet the ambitious goals set a year ago in Paris."
A panel of former mayors and climate experts selected the ten cities that they felt had adopted the most ambitious and effective urban sustainability programs in the world—and C40 partnered with the Associated Press to capture images of each winning city's projects, allowing you a sneak peek whether you live near one of them or not.
"Today, we celebrate some of the projects that are key to delivering on the world's climate ambition and will help put us on a path to a carbon-safe future," Chuanfu Wang, chairman and president of BYD Co. Ltd, said at the awards ceremony. "We recognise the incredible human power and thoughtful consideration that goes into making these projects reality."
1. Addis Ababa, Ethiopa
The city of Addis Ababa is a winner of the C40 Awards 2016 in the Transportation Category. The Addis Ababa Light Rail Transit (LRT) Project has improved the city's public transport system and created more than 6,000 jobs. The cumulative emission reduction potential of the LRT system is forecasted at 1.8 million tCO2e by 2030.
A lady holding her baby wrapped in a white shawl is transported on an Addis Ababa LRT. Mulugeta Ayene / AP Images for C40
An Addis Ababa Light Rail Tram passes through Ethiopia's largest business district Merakto. Mulugeta Ayene / AP Images for C40
Pedestrians look out over commercial and residential buildings on the city skyline. Nearby an Addis Ababa light rail tram passes by.Mulugeta Ayene / AP Images for C40
Residential solar energy companies are helping more and more homeowners upgrade their properties to clean energy sources. Solar energy companies can equip you with the technology you need to harness the amazing power of the sun and reduce your need for fossil fuels. In this article, we'll review some of the most trustworthy providers and installers of solar power.
Our picks for the best solar companies
The first step in the process is researching some of the top companies in the solar industry. Here are the ones that stood out in our research.
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 we chose the best solar energy companies
How did we determine which solar power companies to recommend?
To begin with, we took a deep dive into each company's offerings, assessing them for the following criteria:
- Range of services offered
- Pricing/affordability and financing options
- Extent of service area
- Solar panel efficiency
- Temperature coefficient (e.g., how much high temperatures affect efficiency)
Additionally, we weighed membership and certification by professional associations like the Solar Energy Industries Association (SEIA). Affiliation with these groups is a good indicator that a solar energy company is reputable, and that their work is up to the highest standards within the industry.
The best solar energy companies
schmidt-z / Getty Images
With these criteria in mind, consider our picks for the best solar panel providers and installers in the industry.
If you're looking for a company that can walk you through the process of upgrading to solar power for an easy and convenient experience, look no further than to SunPower. The company offers:
- A "design studio" app, allowing you to safely and seamlessly design your own solar power system so that you can see a visual of what the finished product will look like once installed.
- Online calculators that make it easy for you to determine about how much electricity you will save once you upgrade to solar panels.
- Virtual consultations, allowing you to chat one-on-one with a solar power expert and to ask any questions you might have.
SunPower offers leading solar panels and energy storage technology to homeowners across dozens of states. And, they are also the preferred solar partner of many major businesses, including Walmart, FedEx, and Lowes.
Why buy: SunPower is a reliable solar energy company with an impressive tech portfolio and an extremely easy, intuitive process.
Upgrading to solar power can seem a little intimidating, but SunRun is out to bring simplicity. Their approach makes it extremely straightforward to select a custom solar energy plan for your household. Here's what to know about SunRun:
- They offer virtual consultations with solar energy experts, making it simple to explore your options and determine which solar set-up is right for your home energy needs.
- Each system they design is completely customized to address the customer's needs. SunRun doesn't do "one size fits all" solar equipment options.
- Their guarantee, the best in the industry, offers extraordinary peace of mind that your solar system will prove durable and reliable.
- SunRun also leads in terms of flexible financing options, making solar power accessible and affordable.
Why buy: With SunRun, the name of the game is customization. This is one of the best solar installation companies to turn to for solar power solutions that are truly made with you in mind.
You probably associate Tesla with their electric vehicles, but did you know that the company also produces high-efficiency solar panels? Depending on your needs and your budget, Tesla can hook you up with an array of solar panels or even a solar roof, making it easy to cut electricity costs and power your home via the sun's vital energy.
Some fast facts about choosing solar power from Tesla:
- They offer a price match guarantee and affordable financing options.
- Their advanced solar panel technology offers a low profile, a sleek style, and long-term durability.
- Home battery backups allow you to save solar power and then access it on demand, whenever you need it.
Why buy: Tesla offers sophisticated solar products for what the company claims is the lowest price of any national provider, which they back with a price-match guarantee. Plus, all of their solar panels come with a solid 25-year performance guarantee.
LG is another well-known tech company that is also a leader in solar energy. Some of their solar panels use a bifacial solar module that captures energy from two directions to increase their efficiency. While they are a solar panel manufacturer, they can also help you with the installation process by finding an LG Pro installer in your area.
- They offer an online "solar concierge" service that allows you to evaluate your home energy needs and to compare different options for going solar.
- LG offers a 25-year warranty, not only on their technology but also on the work their of their solar installers.
- They offer a range of solar panels and supporting products, and they supply you with plenty of information to make a fully informed choice.
Why buy: LG is a company that knows technological innovation. Their award-winning solar energy products are reliably efficient, well-priced, and designed for maximum efficiency.
Panasonic has one of the most impressive tech portfolios in the solar energy industry. Their products boast some of the highest conversion efficiency rates, along with the lowest degradation rates. And they back everything with a generous warranty.
Some additional reasons to choose Panasonic:
- They offer a range of solar panels to choose from. With Panasonic, you'll find that you have plenty of options.
- They also provide a lot of great online support and consumer education, ensuring you'll get the most out of your solar technology.
Why buy: Panasonic is a solar panel company with products that are tough to beat. Both their pricing and warranties are very appealing, and their HIT high-performance solar panels offer some of the best power conversion rates of any product.
Vivint is a company that offers a full spectrum of services, including solar power consultation, design, and installation. A few reasons why homeowners trust their solar power needs to the Vivint team:
- Everything Vivint does is customized. They tailor everything to fit your roof and to help you achieve your home energy goals.
- They make the entire process simple, handling all of the little details for you. This includes securing permits, filing the right paperwork, etc.
- They emphasize safety, using only the highest caliber of solar panels and backing everything with a world-class warranty.
Why buy: Vivint is noteworthy for their focus on customization, their commitment to safety, and their one-stop-shop solar power solutions. In addition to solar panel installation, they also offer other specialized technology, including solar-powered electric vehicle chargers.
Enphase is another company that stands out, both for their robust technology as well as for their commitment to customization. Their microinverter technology makes their solar system safer by reducing the likelihood of arc fault fires.
- They design their solar technology with safety in mind, including fire safeguards that other companies can't match.
- Their solar panels are built for durability and can hold up even through the most extreme kinds of weather.
- Enphase uses smart technology to update itself; all you need to do is connect it to your home Internet.
- They also have one of the best apps in the solar industry, making it simple to monitor your home energy use.
Why buy: Enphase is a company of innovators, and their solar portfolio has a lot to offer. Their system is also modular, meaning you can easily add more panels to your system as you need them.
This solar power provider has won recognition not just for their excellent technology, but also for their sincere commitment to sustainability and to ecological stewardship. And don't let the name throw you off: Though Canadian Solar is based in Canada, they provide solar power solutions in the U.S. and other countries.
Some additional facts about Canadian Solar:
- They offer a wide range of products, from energy converters to storage solutions.
- Their solar panels boast exceedingly high energy efficiency rates.
- Canadian Solar has won a number of awards for its first-class innovations, and one of their products even set a world record for conversion efficiency in 2020.
Why buy: This company has a proven track record of technological excellence, plus a real commitment to ecological stewardship. They also closely monitor their supply chain to ensure that no goods or materials used in their products come from prohibited forms of labor.
First Solar boasts an impressive track record of advocacy for solar power and for renewable energy sources. And, thankfully, they back their advocacy with some excellent solar technologies.
A few reasons to choose First Solar solar panels:
- Their technology offers an outstanding temperature coefficient, meaning they won't lose performance during high temperatures.
- Their solar cells are among the most reliable and most efficient in the clean energy sector.
- First Solar also offers a lot of post-purchase, post-installation help, as needed.
Why buy: First Solar is a great option for anyone who's serious about renewable energy, and who wants the best performance from their solar panels.
The biggest drawback to Go Solar is that, right now, their work is limited to just a few states. But if you happen to live in that part of the country, you're in luck. Go Solar's panels are uniquely calibrated to take advantage of the western region's abundant sunlight. Some additional reasons to pick Go Solar include:
- They offer free home solar assessments.
- They custom-design solar systems to meet the needs of your home.
- They have some of the most trusted installers in the solar power industry.
Why buy: For solar solutions that are tailored to the climate of the American West, definitely consider Go Solar. Plus, with their Give Solar International partnership, they give an equivalent solar panel system to a family in Uganda for each system sold.
How does a solar energy system work?
schmidt-z / Getty Images
As you explore the different options for embracing solar power, it may be helpful to have a baseline understanding of how solar energy systems actually function.
Generally speaking, solar energy systems involve solar panels installed on your roof. These panels absorb the sun's energy, storing it in what are known as photovoltaic cells. These cells convert the solar energy into direct current (DC) energy, then use an inverter to convert that DC energy into alternate current (AC) electricity. AC electricity is what you need to power all your home appliances.
It's important to note that, before you purchase solar panels, it's worthwhile to meet with a solar energy consultant who can tell you more about how many panels your home will require, and also to let you know how those panels should be ideally positioned on the roof.
One more note: If you're concerned about the affordability of solar power, it's important to remember that most solar energy companies provide a host of options, including flexible financing and solar lease options for a system rather than purchase it outright. As you talk with different solar energy companies, don't hesitate to inquire about these leasing and financing options.
Benefits of solar energy
Installing solar panels on your home can yield a number of benefits. Here are just a few examples.
One of the main reasons why homeowners choose to install solar cells is that it allows them to truly embrace clean energy sources. Rather than depend on fossil fuels and power plants, you can power your home with renewable energy that comes straight from the sun. This can be a highly effective way to minimize your environmental footprint.
Solar tax credits and rebates
There are a number of ways in which choosing renewable energy can save you money, starting with the fact that there are so many rebates and tax credits available. Essentially, both the federal government and many state governments want to encourage people to "go green" as much as possible, and they will make it worth your while by allowing you to claim these important tax incentives. Some utility companies also offer rebates that can help pay for the upfront costs of solar projects.
Lower electricity bills
Of course, embracing solar power will also help you save money by slashing your electricity bills. Most solar energy companies offer online calculators that allow you to see for yourself how much money you'll save over time, simply by changing to a renewable energy source. There is also an option called a power purchase agreement (PPA) that can allow you to host a solar or renewable energy system from a utility provider in exchange for lowered energy rates. If your solar panel system generates excess energy, the utility will then purchase that energy from you in the form of a net metering credit on your bill.
Make a smart choice about solar power
There are obviously a lot of perks to choosing solar energy for your home. And yet, it can also be a rather daunting process, simply because there are so many solar energy companies to choose from.
Using our guidelines and rankings, start doing your due diligence, seeking the solar power company that's right for you. Remember to look for a company that's well-regarded within the industry and get a consultation before you buy. Always be sure to ask some direct questions about the financing options that are available to you.
Josh Hurst is a journalist, critic, and essayist. He lives in Knoxville, TN, with his wife and three sons. His writing on natural health, nutrition, and supplements has appeared in Health, Shape, and Remedy Review.
The world's cities are growing rapidly and in 2050 two thirds of the global population is expected to reside in urban areas, compared to 50 percent today. That puts pressure on infrastructure, energy supply and housing capabilities in a global climate that is poised to become hotter and less predictable. The challenges become even more complex considering that climate change does not affect urban dwellers equally, with low-income households and poor neighborhoods being particularly vulnerable.
Just out today: #Cities100 showcases 100 leading #ClimateAction solutions in 60+ #cities. Check it out→… https://t.co/BoVUsYHN1G— Sustainia (@Sustainia)1479217905.0
Yet, some cities are using climate action as an opportunity to simultaneously address systemic social challenges. Seoul, the capital of South Korea and Tshwane, in South Africa, are just two cities with solutions featured in this sector which readily demonstrate how climate action and social development can go hand in hand.
Seoul's Energy Welfare Public-Private Partnership Program, for example, seeks to provide cheaper and more reliable power to low-income households, while creating jobs for disadvantaged job seekers. The program trains and employs socially vulnerable workers as energy consultants who assess energy performance and potential savings in poor communities. The program is partly funded by peak hour energy savings from municipal buildings.
The Tshwane Food and Energy Centre provides cooperative farming opportunities and self-sustaining renewable energy generation to an underprivileged community. The 25 cooperative farms allow small-scale farmers to ensure their own food security, earn income from food sales and produce on-site clean energy.
Now in its second year, Cities100 is produced in partnership between Sustainia, C40 and Realdania. It features 100 city solutions, ranging from solid waste management to transportation, that show how cities are blazing a path towards climate adaptation and mitigation.
climate change, making our cities fit for the future is not just a matter of survival, but also presents us with an important opportunity to address social inequality," Mark Watts, executive director of C40, said. "I am inspired to see so many cities taking strong and urgent action."
The publication comes during COP22, when government officials are gathered in Marrakech to put into force the Paris agreement—the most extensive and ambitious agreement on climate action the world has ever seen. Cities will undoubtedly have a huge role in keeping temperatures from rising. Morten Nielsen, managing director for Sustainia, commented, "As we enter into the climate negotiations at COP22, the solutions presented in Cities100 show that climate action is already happening, often in nimble and collaborative ways that do not rely on the will of national governments. By addressing climate action in tandem with social equity, it's clear that cities have a major role to play in shaping global sustainable development."
Jesper Nygaard, CEO of Realdania, is confident that cities are up for the challenge, he said, "Cities and local governments are at the forefront of climate change. This year's Cities100 clearly shows that mayors will not sit idly by when they are faced with climate change, rising inequality and slowing economic growth. I am impressed at the scale of action and it fills me with optimism when I see holistic action provide multiple benefits to citizens, cities and climate.
The whole world held its breath in awe on Friday watching the Opening Ceremony for the 2016 Olympic Games in Rio de Janeiro. A day later I arrived back in the city that has become my second home while Mayor Eduardo Paes has been C40's chairperson for the last two and a half years. As I sit writing this article while enjoying the extraordinary new space in Porto Maravilha, though many have criticized the city for its Olympic preparations, it's impossible not to be moved by the significance of the first-ever Olympics to be held in South America.
Olympic cities are always criticized while under the world's microscope. Though there are some shortcomings here—mostly in areas that were the responsibility of the state or federal government—it's impossible not to be impressed by the transformation in sustainable transport and public space the mayor has instigated as a direct result of taking on the challenge of hosting the world's single greatest international contest.
The promise of the Olympics has been on the horizon since current C40 Cities Climate Leadership Group (C40) Chair and Rio Mayor Eduardo Paes was elected mayor in 2008. He has worked tirelessly throughout the intervening years not only to produce an event worthy of the global stage, but also to invest in and develop long-term legacy projects that will benefit the city and its inhabitants for years to come. Indeed, Mayor Paes has followed the advice of former Barcelona (also a C40 city) mayor and Olympic host Pasqual Maragall: The Olympics must serve the city, not vice versa.
Mayor Paes speaking at a press conference at Paris City Hall with C40 Mayors in 2015.C40 / Flickr
Mayor Paes has stayed true to that principle: For every one real invested in the Olympics, the city has invested five Reais in sustainable infrastructure and legacy projects. The city's ambitions for the Olympics have always been high and under Mayor Paes' leadership it has made powerful and lasting improvements for the city and its people that will endure far beyond when the last athletes have left town.
- There has been a major expansion of the city's public transit systems, including an incredibly rapid development of bus rapid transit that means the proportion of residents using public transport has risen from under 20 percent to more than 60 percent in just 8 years, a brand new light rail system and more than 450 kilometers of cycle paths (as well as the new subway line, built by the state but for which the mayor has been a major advocate).
- The city has completed a major renovation and revitalization of the Porto Maravilha, the city's historic birthplace. They redesigned the area in terms of mobility to make it more friendly to human-scale transit—removing the brutalist perimetral highway (indeed the first time I met Mayor Paes he apologized for being late with the excuse that he had been blowing up the very same road), adding a light vehicle tram, closing streets to cars, creating facilities for pedestrians and building the arrestingly beautiful Museum of Tomorrow.
- Mayor Paes inaugurated the Rio Operations Center, a digital nerve center of the city in which critical services—from waste management to emergency response and traffic control—are monitored to improve the city's efficiency and emergency response. It is a model that has captured the attention of other cities across the world.
- Though the failure to clean up the Guanabara Bay—which has been a contentious location in the lead-up to the games—falls outside the jurisdiction of the Mayor, the city has invested in a new West Zone Wastewater Treatment Plant that will benefit 430,000 people and treat 65 million liters of sewage that would otherwise be dumped in the bay. This is another fulfilled Olympic commitment and it brings better quality of life for thousands of people.
- More than 70 percent of Olympic facilities were built by converting existing structures and some Olympic venues, like the Handball Stadium, are designed to be converted into community projects, like public schools, after the games.
Hosting an Olympics Games is no mean feat for any mayor, but it is particularly challenging when taking into consideration the political and economic turmoil Brazil has been facing over the past 12 months. Rather than criticizing what has not been done in Rio (and there are still many areas that require improvement and investment), those who care about sustainability should be praising Mayor Paes for delivering an impressive raft of infrastructure improvements, while the rest of the country has been at a virtual standstill.
Moreover, in addition to his job as mayor, Mayor Paes has also been the energetic chair of C40 since December 2013 and has been instrumental to engaging more than 20 new member cities from China, India, the Philippines, Africa and the Middle East, such that we now have a majority of members from the global south.
Under his leadership, Mayor Paes and C40 joined partners in launching the Compact of Mayors, creating a new global standard for urban emissions reporting and creating a program of effective "city determined commitments" to mirror the INDCs being pledged by nation states. Mayor Paes led from the front and Rio became the first city to be compliant with the Compact of Mayors. Rio was also the first Brazilian city to complete a study of its climate vulnerabilities and has mandated emissions cuts of 20 percent by 2020.
It has also been through Mayor Paes' personal leadership that we have created the C40 Finance Facility, to address the the startling omission of most of the world's green funds to finance city government's low carbon projects. Starting from initial generous support from the German government, Mayor Paes aims for the facility to unlock up to $1 billion worth of sustainable infrastructure in cities across low and middle-income countries by 2020.
In part because of Mayor Paes' leadership, Latin America is a focal point for city climate action this year: C40 is looking forward to hosting our flagship event, the C40 Mayors Summit in Mexico City at the end of November. Mexico City Mayor Mancera and Mayor Paes will host this gathering where mayors, urban experts, business people and celebrities from around the world will come together to continue positioning cities as a leading force for climate action around the world.
It is with extreme gratitude that we at C40 thank Mayor Paes for his leadership and passion. And is with great excitement that today in Rio we announced the new C40 chair: Paris Mayor Anne Hidalgo.
From left to right: Eduardo Paes, Mayor of Rio de Janeiro and Chair of C40 Cities Climate Leadership Group and Anne Hidalgo, Mayor of Paris.C40 / Flickr
The C40 Steering Committee voted unanimously to elect Mayor Hidalgo, who has maintained a steadfast commitment to urban sustainability throughout her tenure thus far, emphasizing walkability in Paris, spearheading calls to better air quality across Europe and hosting the Climate Summit for Local Leaders alongside the COP21 climate negotiations in Paris last December. She will be an inspiring champion for city voices around the world, leading by example as the C40 chair-elect. She will take over from Mayor Paes after the C40 Mayors Summit in Mexico City later this year.
It is no coincidence, too, that Paris is currently bidding to host the 2024 Olympics, more than half of the cities that have hosted the Olympics are also C40 member cities. And, given that the International Olympic Committee has outlined a commitment to a sustainable future, it's no surprise that C40's member cities—which represent the most powerful and innovative cities in the world—are not only great places to live, work and prosper, but are also make supremely competent Olympic hosts.
Mayor Paes has been an exceptional leader for the last several years and Rio has set an example for other cities around the world seeking a clean development pathway. We look forward to Mayor Hidalgo carrying that charge forward for the critical years to come.