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Almost every home battery lets you watch. A much smaller number lets you change anything. This is the full dossier behind the video: the endpoint or register per brand, the firmware version it applies to, the verification date, and the arithmetic that shows why an 800-watt setpoint rarely pulls 800 watts out of your battery.
Salespeople say a plug-in battery can't trade. That's true for one of the three meanings of that word, and not for the other two. Here's which brands you can control locally, why your energy supplier is the real bottleneck, and why a cheap hour can still cost you money — with the 590-day backtest that backs it up.
