Hi, I have 2 x 5KW Axpert inverters. Just bought a new 10.5 KW Revov lithium battery pack. I installed it myself and as soon as the batteries supply the load by themselves the inverters cut out and give me an error 72. The voltage output is not stable, it jumps up and down. When I put one inverter of by the off switch, the voltage is stable at around 230. Please can someone help. 
 

6 hours ago, Werner said:

as soon as the batteries supply the load by themselves the inverters cut out and give me an error 72

Error 72 is "current sharing fault". Check that the current sharing cables are installed correctly per the paralleling guide, and that the wires have not come loose.

Edit: they may well have been disturbed when the battery was changed.

Edited January 13, 20205 yr by Coulomb

Hi Werner, did you ever solve error 72? A few of us are getting it and are discussing it here:

 

On 2020/07/15 at 8:54 PM, Denarius said:

Hi Werner, did you ever solve error 72? A few of us are getting it and are discussing it here:

 

am also experiencing the same code SF72 error message. Everytime we need to reboot the system manually. Mine goes off at any percentage. Got hold of the manufacturer of our Rebel Max Inverters- they say that it will happen when there is an overload. Which I do not believe because we were away from home for almost six months and our fridge was switched off. Basically, no usage but it kept going off.