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More states in the U.S. now require smart inverters, enabling more distributed solar

Pennsylvania and Minnesota have joined six other states in requiring smart inverters for distributed solar and storage. Certain utilities in 13 states and Puerto Rico also require smart inverters, while six states are considering the requirement. Smart inverters enable more solar on distribution circuits.

US government proposes 10 ‘national interest’ transmission corridors

Eight of the 10 transmission corridors proposed by the US Department of Energy (DoE) could facilitate transmission between grid regions. One would expand transmission within the Mid-Atlantic’s PJM grid region, and one would expand transmission in the Northern Plains.

US roadmap streamlines solar project interconnections

A new US Department of Energy (DoE) roadmap outlines 35 ways to allow solar developers to expedite the interconnection of utility-scale renewables and storage projects. The roadmap, developed through a DoE stakeholder process known as i2X, proposes actions to implement these solutions.

US government funds pilot project for heated sand energy storage

The US Department of Energy is funding a pilot project to demonstrate the commercial viability of storing energy in heated sand, which is capable of producing 135 MW of power for five days.


Amazon Web Services helps Duke Energy complete power flow studies in hours, not months

Adding residential solar or commercial-scale electric vehicle chargers on a utility’s distribution feeder may require the utility to conduct power flow calculations. Duke Energy can now complete those studies in hours, an Amazon executive said at a policy forum held by ACORE.

Puerto Rico distributed solar rises to 680 MW, residential storage to 1.6 GWh

While distributed solar and storage are advancing quickly in Puerto Rico, utility-scale solar and storage procurements ordered by regulators in 2020 have made little progress.

Native American tribes to back 1-3 GW of renewables to replace hydro dams

Four Native American tribes, two US states and the US government have agreed to work together to replace the energy now produced by hydroelectric dams.

Lobbyists call for more front-of-meter solar in California

California should put front-of-the-meter distributed solar on an equal footing with transmission-connected utility-scale solar and behind-the-meter solar, say several US advocacy groups.


Reconductor existing transmission to ‘unlock’ renewables, says UC Berkeley study

Large-scale reconductoring of existing transmission lines could cost-effectively double transmission capacity within existing rights-of-way, a study says. Renewable energy projects near reconductored transmission lines could more easily interconnect.


California to use flexible appliances for renewable energy integration

California plans to shift 3 GW of load from dirtier, more expensive times of day to cleaner, less expensive times by setting flexible demand standards for many types of electric appliances. Global interest in California’s work is high, according to a state agency commissioner.