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The Nameplate Lied: Real-World AGM Battery Capacity, Sulfation, and What Happens When You Push a Solar System to Its Limits

I wake up. The first Sunbloc stress test was just completed the night before. Other than the voltage being uncharacteristically low the batteries operated without failure. A low SoC event but completely recoverable. I check the controller. It's in float. That shouldn't be happening at all. Even worse it's only midday. The batteries should be swallowing up all the energy possible after a night of deep discharge. Their was more to the state of the batteries. One stress test sho

Matthew Wheeler

May 275 min read