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Technology & Products
Wärtsilä and RCT Solutions launch storage integrator Valo Wärtsilä has moved its battery energy storage system (BESS) business into a 50/50 joint venture with RCT Solutions, which it expects to remain loss-making until late 2027.
Brian Publicover
Oct 05, 2026
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Applications & Installations
Battery storage paired with 37% of new U.S. residential solar systems in 2025 Battery storage was paired with 37% of new U.S. residential solar installations in 2025, up from 25% a year earlier, with adoption accelerating both in California and across other states.
MaryElizabeth Q. Mooney
Oct 03, 2026
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Markets & Policy
Brazil hits 56 GW of connection headroom for battery auctions Brazil’s available grid capacity for battery storage projects exceeds the association’s estimate of 2028-30 power needs by up to 12.5 times, according to an analysis of transmission data.
Lívia Neves
Oct 03, 2026
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Markets & Policy
Middle market momentum The rollback of policies favoring renewable energy deployment in the United States is contributing to an energy affordability crisis in many communities, according to Jon Powers, president of Clean Capital, a US independent power producer (IPP) active in the distributed generation segment. He spoke with pv magazine to warn fellow industry veterans that now is the time to ramp up solar deployment advocacy as elections loom and energy prices become a bipartisan issue.
Blathnaid O’Dea
Oct 03, 2026
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Research & Development
German startup wins grant for grid-charging sodium-ion home battery Revolta AG has secured European Regional Development Fund (ERDF) support to develop a plug-and-play sodium-ion battery that households without solar panels can charge from the grid when power prices are low.
Brian Publicover
Oct 02, 2026
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Markets & Policy
Germany approves rules for storage, bidirectional charging Germany’s Federal Network Agency (Bundesnetzagentur) has approved rules for the market integration of electricity storage systems and charging points (MiSpeL), allowing batteries to combine renewable and grid electricity while preserving support for eligible renewable power.
Petra Hannen
Oct 02, 2026
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Markets & Policy
Japan tightens grid access as battery queue reaches 172 GW Japan now requires generators, including battery developers, to prove rights to their sites to keep a grid connection, as regulators move to curb capacity hoarding in a battery queue that far outruns the less than 1 GW of grid-scale storage actually connected.
Brian Publicover
Oct 02, 2026
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Applications & Installations
Shared grid connections concentrate battery insurance risk Tokio Marine GX (TMGX) sees exposures of up to billions of dollars building up at co-located battery energy storage system (BESS) sites, and says lenders are only beginning to require cyber cover.
Brian Publicover
Oct 02, 2026
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Research & Development
Age awareness for BESS As the use cases for battery energy storage systems (BESS) evolve, so does the way the batteries are operated. How these changes affect BESS lifetime and reliability is a question the industry needs answered, and one the International Energy Agency’s Photovoltaic Power Systems Programme (IEA-PVPS) is working to address. Erik Marstein, director of Norwegian PV Research Center FME Solar, outlines the results of recent research into BESS reliability and how asset owners can take system aging into account in daily operations.
Erik Marstein
Oct 02, 2026