growatt sph issues

[marsbuild]

I have a growatt sph 6000with four lithium ion batteries and 14 solar pannels.
We have had issues with the system tripping and then two fridges, a freezer and a water pump all blowing.
We think this could be that when the power trips the inverter switches to EPS, but the installer has the Eps running the whole distribution board and the EPS only supplies a maximum of 3kw/h so if we have a few things running were are trying to draw to much and this causes the issues.
But someone also mentioned that the inverter could be modified sign wave rather than pure sign wave and this could be the issue.
Does anyone know which the Growatt SPH 6000 is?

Thanks

 

[10thwave]

I have similar issues with mine, if i disconnect grid power, turn changeover to EPS loads (garage consumer unit) it blows the glass fuses in the alarm system and gate PSU, seems like there is a surge during the switching process.

Growatt do an automated changeover unit https://www.alternergy.co.uk/growatt-ats-switch-1ph though i am at a loss how this would switch the loads any different to how i am doing it.

Does your system incorporate an automatic transfer switch ?

Jack