Hi,

I have for repair inverterEASUN iSolar SMR II 5.5kW ( REVO-VM II 5.5kW ).

Inverter start, after few seconds no battery show on display and inverter not get power, no any error.

I test with other controller board, work good, i think is firmware problem or microcontroller.

First to change controller need to test with new firmware

Edited January 11, 20233 yr by mihaigsm2003
Added foto

1 hour ago, mihaigsm2003 said:

EASUN iSolar SMR II 5.5kW

5.5 kW is a non-standard size for an Axpert. So this appears to be a clone, even though EASun appear to resell legitimate (non-clone) Voltronic inverters as well. 

Or maybe this is a clone manufacturer illegally using the EASun brand.

In any case, I don't think that you can use standard Axpert firmware for these, unless 5.5 kW is a straight-out lie and it's actually an Axpert MKS II 5.0 kW.