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The AEG SolarCube Pro costs € 1,799 and promises 6.0 kWh usable and a single efficiency figure. We hooked it up to our techbench for two days, walked the whole discharge curve by hand and closed the cycle: 1,165 Wh went in and 947 Wh came out. After the test, off the grid, it drained itself until the battery management system locked it out, and it only came out of that by itself 4 days and 5 hours later. Here is the full file behind the video: every figure with its origin and grid setting, the registers we mapped ourselves, the places where the product sheets contradict each other, and the fifteen things I do not know yet.
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.
