AC 300 solar charging does not start in the morning

My AC 300 has this problem:

  1. 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

  2. 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

Hi @tonino , Is your UPS mode set to standard UPS?

Thanks for the question , no, it is set to PV Priority UPS, but the problem I had even when it was on Standard UPS, already as soon as it was removed from the box it had this problem


Hi did you manage to resolve this issue as I am having the same problem

Hi I was wondering if you have solve this issue as I am having the same problem

@Thang You also used the D300S right?
If so, are the D300S and solar panels grounded? If grounded, try not grounding them and see if you still need to reboot the D300S in the morning to get normal input.
Did you reconnect to WiFi after shutting it down at night? does the WiFi connect properly?

@Thang did you resolve this issue? I have both an AC300 and D300S and need to either have the AC300 turned off overnight, or the D300S restarted in the morning, for the PV input to be activated.

Hi all, I had AC500 and D300S running properly until July 1st, and from 2nd on it didn’t start PV charging in the morning. I need to switch off D300S for around 5 seconds, switch on again with some PV input power and the AC500 starts charging. I was in contact with Bluetti team, got another D300S but with same behavior. No other solution proposal. So I need to go down, switch every morning - an unattended operation is impossible. Does anybody have same problem - or maybe a solution??? I next will try to perform a factory reset, maybe this might help…?

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Hi Klaus, unfortunately I have this issue still with the AC300. Since I have a large solar array, I use the D300S module.
If the AC300 is on when the D300S has enough input to activate in the morning, the AC300 will not register any PV input. Only when I shut off the AC300, the D300S will automatically wake up the AC300 unit and PV input will rise.

This means that in the situation I would be away from my home (which is off-grid, so grid charging is not an option), with continous loads, Bluetti battery units would not charge at all after the first day even though the solar panels would be producing plenty of wattage.

There needs to be a software update for this issue. Having the AC300 shut off for one short moment and restart is very inconvenient, but seems to be necessary to have the PV input started, unless the unit was shut off overnight.

It used to work for me to turn the D300S off, and on again after waiting 5 to 10 seconds, but recently that also didn’t start the PV input into the AC300.