Author
John Fitzgerald Weaver
Commercial Solar Guy is a commercial & utility solar developer, general contractor for commercial and residential solar, as well a consultant. We construct projects in MA, RI, NY, and soon PA. The company has worked on projects across the United States – currently in California, New York, Pennsylvania, Massachusetts, and others. We have also consulted internationally. If you’re a business or land owner, we’ll make sure you know the details on the deal you’re signing.
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Articles written by John Fitzgerald Weaver
Design solar for storage now, or retrofit at a premium later
New analysis of retrofitting solar power plants with energy storage, accounting for the industry’s rapidly falling prices, suggests that prepping your solar projects today has a strong chance of being in your financial interest.
Jul 28, 2025
California solar curtailment down 12% on back of batteries
For the first five months of 2025, CAISO data showed solar electricity curtailment declined by 12% as a share of generation, falling from 13% to 11.5%, even as solar output grew 18% year over year. During this period, however, curtailment still rose 4.1% in absolute terms, with March showing a 28% increase, matching the prior year’s peak.
Tesla deploys 9.6 GWh of battery storage in Q2, 10 GWh Nevada cell factory ‘nears completion’
The electric vehicle company reported flat energy storage growth, quarter over quarter, but nearly 50% growth year-to-date, compared with 2024. Tesla has deployed 37.9 GWh over the past four quarters and is approaching 100 GWh deployed.
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US tender alert: Massachusetts takes steps toward 40 GWh energy storage
The commonwealth has issued a draft request for proposals (RFP) for 1.5 GW of batteries with four- to 10-hour storage capacity, primarily funded through the state’s Clean Peak Standard (CPS). The tender is part of a broader effort to procure 5 GW of energy storage by 2030.
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