Hi i have 4 axpert max 10kw and these days they started acting strange.

I have for inverter 1 and 2 , solar and utility and inverter 3 and 4 solar only, but around 7:30 am the inverters 3 and 4 start charging from utility with 15amps each i try everything i can think of, power cycle all the inverters and nothing, this started to happend after 2 days of power outage. I can seem to block the utility charge from inverter 3-4, before 7:30am works fine only inverter 1-2 charge with 2amp each. I have 8 batteries Pace BMS all connected to a busbar. Solar assistant and home assistant. All the inverters connected to solar assistant. Any ideas???? Also i have the 90v problem but there is no support to update the firmware here in Chile.

Everyday this happend at 7:31 am, i cant get a workaround this

On 2025/08/07 at 9:55 PM, Tsmithf said:

Everyday this happens at 7:31 am

At a very wild guess: Something corrupted the EEPROM, and now there are charge source settings set to take effect at a particular hour or set of hours. It could also be per-hour charge source priority as well.

Yes, it happens at 31 minutes past the hour, but very likely the time was never set properly, and/or the time has drifted so now it thinks that 7:31am is on an hour boundary.

Use whatever monitoring software you have, or the front panel, to reset the per-hour charge priority and output source priority.

On 2025/08/05 at 9:54 PM, Tsmithf said:

Also i have the 90v problem but there is no support to update the firmware here in Chile.

The "stuck at 90 V" issue is mostly fixed with patched firmware; few factory firmwares fix this problem. Voltronic seems to be blind to this and a few other problems with their firmware, for reasons that are beyond me.

What main (U1) firmware are you running? There is patched firmware for most Max models to address this issue, and you can do it at home without the help of your supplier.

Thanks a lot i will check the per hour problem.

when i press the arrows on the inverter

Says: U18206

U22221

U30000

Solar assistant says firmware 82.06

All the inverters are the same

The only thing i could find about timer for charger was setting 100. But the 4 inverters are the same, CSO,SNU,OSO at 00:00

I found another strange thing, this happend only when solar is in play, today was a very cloudy day so i stay only in utility mode, and now at night the inverters respect the rule of 2amp each for 1-2, 3-4 no charge

On 2025/08/09 at 4:57 AM, Coulomb said:

At a very wild guess: Something corrupted the EEPROM, and now there are charge source settings set to take effect at a particular hour or set of hours. It could also be per-hour charge source priority as well.

Yes, it happens at 31 minutes past the hour, but very likely the time was never set properly, and/or the time has drifted so now it thinks that 7:31am is on an hour boundary.

Use whatever monitoring software you have, or the front panel, to reset the per-hour charge priority and output source priority.

The "stuck at 90 V" issue is mostly fixed with patched firmware; few factory firmwares fix this problem. Voltronic seems to be blind to this and a few other problems with their firmware, for reasons that are beyond me.

What main (U1) firmware are you running? There is patched firmware for most Max models to address this issue, and you can do it at home without the help of your supplier.

Still with the same problem, i have tried everything, any ideas?? Thanks!

On 2025/08/09 at 4:57 AM, Coulomb said:

At a very wild guess: Something corrupted the EEPROM, and now there are charge source settings set to take effect at a particular hour or set of hours. It could also be per-hour charge source priority as well.

Yes, it happens at 31 minutes past the hour, but very likely the time was never set properly, and/or the time has drifted so now it thinks that 7:31am is on an hour boundary.

Use whatever monitoring software you have, or the front panel, to reset the per-hour charge priority and output source priority.

The "stuck at 90 V" issue is mostly fixed with patched firmware; few factory firmwares fix this problem. Voltronic seems to be blind to this and a few other problems with their firmware, for reasons that are beyond me.

What main (U1) firmware are you running? There is patched firmware for most Max models to address this issue, and you can do it at home without the help of your supplier.

Hi, can you point me in the right direction for firmware update?? I allready power cycle the inverters and the problem remains, as soon as i have any solar production the inverters charge from the grid until a force them to go to SBU