My AC 300 has this problem:
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if it stays on at night and supplies energy, the solar recharge does not start in the morning, I have to turn off AC300 to start the solar recharge
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if I leave it on at night, but without load, after a few hours it loses the wifi connection, but in the morning it starts charging from the solar and the wifi connection resumes
ECO mode is off
for the rest I can charge it with my roof panels using the D300S which gives me 1.4 kwatt when the sun is out