SEIA shreds DTE Energy’s resource plan

2 GW more solar in the near term would save DTE’s Michigan customers $100 million. DTE proposes only 11 MW of near-term solar, or less than one percent of the optimal amount.


Arizona’s potential to develop unbiased 15-year resource plans is up for grabs

An Arizona regulator has advocated for using a modeling tool being developed by Arizona State University, to help the state plan how to phase in more renewable energy. Yet the university’s initial plan for the modeling tool would not serve that purpose well.


A household-scale virtual power plant has arrived

Aiming for 70% clean energy by 2030, Colorado’s Holy Cross Energy is piloting a household-scale virtual power plant technology that will help integrate more rooftop solar and storage. A device in each home optimizes provision of power to the grid, as well as grid services.

Sunrun opposes utility plan to control all new distributed energy resources

A regulatory proceeding raises issues of monopoly control; whether distributed resources will be compensated for providing grid services; and the capability of smart inverters to operate autonomously, without external controls, in response to signals on price, voltage and frequency.

Federal PV cost projections spin gold into straw

The same report that expects utility-scale PV costs to fall 54% from 2017 to 2021 also presents a constant-cost scenario from 2018 onward, on an equal footing with the “mid” and “low” cost scenarios. Utilities could be tempted to use the constant (high) cost scenario in their resource plans, and thus plan little or no added solar.

Cryogenic energy storage firm teams with Tenaska to develop U.S. projects

England’s Highview Power has contracted with U.S. energy developer Tenaska to pursue gigawatt-hour scale cryogenic energy projects in the U.S. Highview reports a storage cost of $140/MWh at industrial scale; the firm currently operates a 5 MW pilot facility in England.


PJM’s proposed 10-hour storage minimum debunked

Four-hour storage can provide up to 4,000 MW of capacity in the PJM grid region, providing reliability value equal to that of conventional generators.

Enormous Montana pumped hydro project gets Danish investment

The investment from Copenhagen Infrastructure Partners suggests that new pumped hydro storage projects can compete with battery storage. Construction of the 400 MW, 3400 MWh facility could begin as early as next year.


PV interconnection requirements may change with new reliability guidance

Interconnection requirements for mid-sized and large inverter-based systems directly connected to the transmission grid may change based on new guidance issued in draft form by the North American Electric Reliability Corporation. The guidance does not apply to distributed PV.

Coal and gas red-flagged on reliability; solar doing fine

In an annual report card on North America’s grid reliability, coal and gas are sent to the principal’s office, while solar gains operating guidance related to 2016 and 2017 wildfire-related outages. Texas is cautioned for its lower-than-desired reserve margin, although that was not a problem in 2018.

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