Post-Maria, the Puerto Rico National Guard clears debris from a road in Yabucoa.

Late last month, journalist Julio Ricardo Varela noticed a confusing discrepancy in how the Puerto Rican government was reporting electrical status on the online portal built to monitor the recovery post-Maria. 

Many writers had been reporting the website's figure labeled “AEE” -- for Puerto Rico’s Autoridad de Energía Eléctrica -- as the portion of the island that had the lights turned on. But on Oct. 26, that label changed to “AEE Generation.”

Ricardo Varela confirmed with Governor Ricardo Rosselló’s office that the percentage actually represented the portion of peak generating capacity the island was producing, with much

Evidence Mounts That Coal, Nuclear Interests Influenced Perry’s Grid Resiliency Rule

Energy Secretary Rick Perry’s effort to change federal energy regulations to favor coal and nuclear power plants in the name of grid resilience has received a barrage of criticism for misstating the facts, ignoring the evidence, and attempting to ram through a major disruption in interstate energy markets on an emergency timeframe. 

While Perry has insisted this initiative is necessary to "rebalance the market" and "keep our families warm," there's mounting evidence the proposal was taken from an industry playbook. 

The accelerated timeline for DOE’s notice of proposed rule making (NOPR) is outside of the norm for such a radical

Can Sunverge's new CEO help the company pivot toward a software-centric approach? 

This week, the behind-the-meter battery aggregator swapped out its chief executive as part of a shift in strategy. CTO Martin Milani is replacing Ken Munson, who co-founded Sungevity and served as president and CEO for nearly a decade. 

"After 10 incredible and intense years of building a market and achieving what most never thought possible with virtual power plants and energy storage, it's a natural time to transition the company over to new leadership to ensure its scale," said Munson in an email.

Milani, who calls himself a "software visionary,"

KK Wind Solutions is pairing batteries with wind control systems.

The Section 201 trade case has injected a lot of uncertainty into America’s solar market. It’s hard to plan with the threat of new tariffs. It’s even harder to plan in this political environment. 

But the solar industry is used to uncertainty. That’s why so many people call it the “solar coaster.” Beyond trade wars, the industry has routinely dealt with uncertainty around tax credits, the stimulus program, state mandates and incentives, and now, the prospect of a tax reform bill in Congress.

Put simply, solar market volatility is the norm, not the exception in the U.S.

But as the market matures and expands

Subtitle: 
A $300 billion campaign to replace old water lines pits plastic against iron
Images: 

Replacing aging water lines will cost U.S. utilities $300 billion over the next decade, according to one industry report, and the prospect of big pay days ahead for pipe and hardware manufacturers has touched off a lobbying battle between the plastics and iron industries.

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A manufacturers' substrate choice has a big impact on the green credentials of LED bulbs.

The rise of LED light bulbs has been driven in large part by their environmental credentials, and rightly so. LEDs consume a fraction of the power used by traditional incandescent bulbs and have exceptional longevity, lasting up to 25,000 hours.

Most of an LED’s environmental impact (around 98 percent) is incurred during its use. Factors such as longevity and efficiency present the greatest opportunity for LED manufacturers to improve the environmental impact of their products. After that, the biggest influencing factor -- the "greenness" of the power source itself -- is out of the manufacturers’ hands.

However, while only constituting around 2 percent of the overall environmental

Sunrun increased the profitability of its rooftop installations last quarter, thanks in part to a higher share of storage deployments.

For a while there, leading residential solar installers had a one-track mind: they could grow or make money, but not both.

The national players opted for growth through the early 2010s, until the deferral of making money started to catch up with them. It took out Sungevity, at one time number three U.S. residential installer. It led to Tesla’s takeover of market leader SolarCity, and the brand’s subsequent erasure.

Sunrun still stands on its own, though, and it’s out to prove it can do two things at once.

"We're super bullish -- we love or market position," said

KK Wind Solutions is pairing batteries with wind control systems.

KK Wind Solutions, a Danish wind systems developer, is planning to use turbine-based batteries to reduce output fluctuations by 90 percent. The company said it could achieve the reduction with storage levels amounting to about 8 percent of total wind farm capacity.

“The purpose of the project is to develop a new modular battery storage solution, which is integrated into the wind turbine itself,” said the company in a press release last month. “The solution will be based on a combination of state-of-the-art battery technology and software algorithms that enable monitoring and control of the batteries.”

Turbine maker Vestas, Danish engineering firm PowerCon and Denmark’s

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