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The Conow Atlas 6000 AC costs € 1,720.96, and Conow promises that at least 81% of what goes in comes back out. We put it on our techbench for eight days. At 1500 W, 87 of every 100 kWh came back, socket to socket. At 3000 W it depended on how warm the battery was when charging began: with a warm battery it derates halfway, the charge takes 102 instead of 92 minutes, and less comes back. This is the full file behind the video: every figure with its origin and condition, five charts, control over RS-485, what Conow acknowledged and committed to, and what I do not know yet.
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.
The comprehensive technical review of the Zendure SolarFlow 2400 PRO and AC+. With efficiency test results, thermal measurements, and an honest comparison -- including the data that didn't fit in the video.