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
US medium duration storage endures woes, while Form’s long duration grows, and lithium overflows
U.S. medium and long duration manufacturers EOS and ESS are showing stress, while Form Energy is outpacing projections and now must scale – all while being stalked by lithium’s ever widening use profile.
6 hours ago
When the sun sets, batteries rise: 24/7 solar in California
On February 1, 2026, California’s batteries bridged the solar gap with seamless precision. After discharging through the night until sunrise, they spent the daylight hours charging, then pivoted back to exporting power well past midnight—effectively sustaining the state on solar energy for a full 24-hour cycle.
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Illinois responds to OBBBA with 3 GW of energy storage, VPPs, and more
The state is moving an energy bill through the legislature, that would – among other things – institute a 3 GW energy storage goal, create virtual power plant (VPP) and time of use plans, enact permitting reform, and more while concurrently reopening the solar program allowing it to more than double the year’s capacity goals.
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Software-defined power: FlexGen’s HybridOS turns batteries into grid thinkers
FlexGen says the future of energy storage isn’t necessarily in bigger batteries but in smarter ones, and has now brought solar power into its software. Its Linux-based HybridOS platform coordinates batteries, inverters, and solar systems to think and act like living parts of the grid.
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