10GW/year of solar and 5GW/year of storage would be needed under that aggressive scenario, according to an analysis for the California Air Resources Board.
Interconnection is widely seen as a bottleneck slowing solar deployment. Even so, three regional grid operators processed 25GW of utility-scale solar interconnection requests last year, an amount exceeding utility-scale solar installations in the entire US during the year.
“Advanced conductors” can deliver more electricity than conventional transmission lines, using existing transmission towers. Renewables trade group ACORE calls for greater use of advanced conductors, “to accelerate low-cost decarbonization.”
For short-term storage in a 100% renewables grid, thermal energy storage located at concentrating solar power plants could compete with batteries, found a study using an idealized grid model. Seasonal storage needs could best be met with power-to-gas-to-power technology.
Workplace EV chargers, which number only 10,000 in the US, are needed for charging EVs in regions with abundant solar generation, says an RMI study. Home chargers are fine in regions with high wind generation, to enable nighttime charging with wind power.
A Vibrant Clean Energy study commissioned by Vote Solar found that GW-scale investments in distributed solar and storage would yield the lower cost between two approaches studied for Michigan to achieve economy-wide carbon neutrality by 2050.
Ending anti-solar rates in the Phoenix area depends on maintaining an Arizona law favoring competition in the electricity sector. The Arizona House has voted to end such competition, and the Arizona Senate could do the same.
Four groups that support rooftop solar have asked federal energy regulators to disallow the “common” utility practice of charging their customers for their anti-solar advocacy.
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