Solar PV

This rooftop array atop a Walmart store in Santa Ana, California, was one of the company's first. Walmart now boasts more than 100 MW installed capacity across the U.S.

Blue chip companies in US increase PV deployment by 28%

The third-annual Solar Means Business report from the Solar Energy Industries Association (SEIA) has revealed that many of the U.S.’s leading Fortune 100 companies have continued to step-up their use of solar PV as a leading clean energy source. SEIA’s report shows that 569 MW of solar PV capacity is now deployed across 1,100 sites owned and


Off-Grid Solar is Going to be HUGE

Everywhere you look, the off-grid clean energy market is booming. Sub-Saharan Africa is seeing 300 percent compound annual growth in off-grid lighting; Bangladesh is putting up 30,000 to 40,000 solar home systems every month; and d.light, a for-profit seller of solar lights, recently reached its 1 millionth customer. If these numbers haven’t raised the attention of institutional investors,

Kyushu Electric | KYODO

Green power floods Japan grid as premium prices bite

Japan’s utilities say they are being swamped by green power because of rules forcing them to buy up every last watt produced from renewable sources, as new generating companies seek to cash in on premium prices. Power firms say the grid does not have enough capacity to cope with the rocketing levels of electricity that

Dartmouth, MA landfill photo by Greg M. Cooper / Borrego Solar

Solar Landfills: One Person’s Trash Is Another’s Treasure

Green Mountain Power just broke ground on a 2 MW photovoltaic plant in Rutland, Vermont. While some other large PV systems planned for the area have met with strong opposition(some residents worry large, ground-mount solar arrays will be an eyesore on the state’s pastoral landscape), this project seems to be welcomed with open arms. Why? It’s



Patagonia Will Start Paying for Homeowners’ Solar Panels in Hawaii

Patagonia plans to use state and federal tax credits to invest $13 million in the construction of solar panels on 1,000 homes in Hawaii, turning the eco-conscious retailer into the financial backer of a green electrical utility. With the announcement on Wednesday, Patagonia hopes companies across America will follow suit with similar efforts. “Any U.S. public or


Intersolar names Jim Callihan Director, Sales and Marketing North America

SAN FRANCISCO, October 14, 2014 – Intersolar North America, the most well attended solar industry exhibition and conference in North America, today announced the addition of Jim Callihan to its team as Director, Sales and Marketing North America. Drawing from nearly two decades of experience in the solar industry, Callihan will serve as a liaison

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SolarCity Giving Loans For Solar Ownership

Outfitting your home with cheap solar power just got a lot easier. Elon Musk-chaired Solar City, the biggest name in residential solar power, is now offering loans to allow their customers to own their solar panels for cheaper than their current lease offerings. The loan option, called MyPower, ends up cheaper it is paid back by


The Relationship Between SREC Prices and Solar Leasing

Several forums, including this one, covering residential solar developments have commented on the volatility of SREC markets in some states. But few have yet to note the potentially tremendous impact on solar leasing, and residential solar adoption in general, in those SREC states experiencing severe fluctuations in pricing. You may have read how the New


Clean Energy Finance 101

As innovative energy products and services come to market, so do new mechanisms to fund them. And existing funding options become more popular. This has resulted in a boom of finance jargon, especially regarding energy efficiency and renewable generation. Though many of the finance terms used in clean energy finance are similar to those used



What Is SolarTAC?

The Solar Technology Acceleration Center (SolarTAC) is the largest multi-user outdoor research, testing, development and demonstration facility in the world. SolarTAC offers its members the opportunity to perform proprietary and collaborative research, development and demonstration activities that accelerate solar technology. “In a rapidly expanding solar market, there exists a need to fine tune early commercial and near-commercial


Carla Peterman

How Carla Peterman and the CPUC will Make Calif. an Energy Storage Leader

Energy storage has been hailed as a “holy grail” for clean energy. Through energy storage, renewable power can be tapped whenever it’s needed, not just when nature cooperates. This means that utilities can overcome the intermittent production of renewable energy while controlling power supply and demand. And residential homeowners capturing unused electricity from rooftop solar

CO2 watch


What Modern Cities Want From Their Utilities. (It Ain’t Pretty.)

Quick Take: If you are based in the United States, you may not have noticed this trend. I spotted it because I serve as the Chairman of the Smart Cities Council. That puts me in touch with urban trends from around the world. Such as the powerful move in Europe to dramatically reduce carbon emissions.  And how



Will Stem’s Battery Systems Combined With Kyocera’s Solar Boost Energy Storage Adoption?

The convergence of rooftop solar PV and behind-the-meter batteries continues. On Tuesday, Japanese solar module giant Kyocera announced it has teamed up with Stem, a startup that’s installed about 6 megawatts of behind-the-meter lithium-ion batteries, to “offer an integrated solar photovoltaic (PV) and energy storage solution for commercial power users.” Under the non-exclusive agreement, Stem will



New 3-phase microinverter for large scale applications

Microinverter expert APS is now shipping its new 3-phase YC1000 inverter, which can handle 277/480 grid voltages and up to four PV modules per unit. Up to eleven units can then be linked in a single 15 A circuit. The maximum output of one YC1000 lies at 900 W and additionally it has integrated ground

Student Solar

Heating & Cooling


In Focus: Solar Heating and Cooling

The greatest country on Earth, as it likes to bill itself, America is currently shut down, thanks to political intransigence and public ignorance. You’d think saving over $60 billion and creating thousands of jobs might wake it out of its gridlocked stupor. That’s what the Solar Energy Industries Association (SEIA) says the United States could

Hot Water


Promise Energy: Solar Hot Water Rockstar

Promise Energy is a newcomer to southern California’s solar hot water market, but the company has wasted no time building a strong business. Promise, which is just a year old, has focused on solar hot water installations for multi-family affordable housing complexes in Los Angeles and San Diego, said spokesman Andy Mannle. “Solar hot water



Passive Solar in the Home

While solar power has become prevalent in the mainstream construction business in the past decade, passive solar design has been used around the world for thousands of years. Ceramic tiles and stones walls in the Mediterranean made it possible to keep homes cool even under the scorching heat of the summer sun. Likewise, small window