Hi forum .. I am rather at my wit's end with this problem and I'm hoping someone may have experienced similar or has a clue about what is going on. The retail supplier does not answer emails or respond to phone calls and China seem unable to help, probably because I don't have solarman running (no internet at site as yet).

In a nutshell .. the inverter is paired with a Dyness 5k battery, with a CAN cable connected correctly (battery BMS reveals what looks like the correct parameters). The system is setup as a UPS with minimal parameter changes from the defaults.

After 2 weeks the inverter started flagging the F56 error at the start of load-shedding, sounding the alarm, and shutting down . . . this would repeat every few minutes. The only load on the inverter was basically LED lights. Killing the load, by bypassing the inverter, stops alarm. The monitor screen showed a text message in red .. 'Smart' next to the 'load' icon. All the while the battery stoically reveals no problems .. voltage is steady at 53.14, SOC is close to full.

What emerged after studying the various screens, was that somehow the GEN PORT USE had the 'smart output' ticked with 0W set in the power window. This was corrected .. 'generator input' ticked. The 'smart' message disappeared but the error recurred. As a hunch I upped the 'smart output' power setting to 1300W and all was well, until a 1800W toaster was turned on. Why should that be when 'smart mode' is not selected?

I am beginning to suspect either a finger-poken problem, or a mains borne glitch that corrupted some parameter somewhere in the machine's little brain. I tried a 30 min total shutdown and reboot, but alas, that did not fix the problem.

Next trick is to try a factory reset, but I am apprehensive re the default settings, etc. Any clues anyone, or information, or suggestions please.

Ciao

Do you use the  Gen port / gen charge? if not then you can untick it completely.

What discharge rate (in Amps) is set for your battery?

I remember seen a post here in the past that the problem was something to do with the Max discharge rate.

I'm not using the gen port at all .. how do you untick it .. by double tapping it?

Only charging is via the grid connection. I set nothing up for the battery since I left that up to the BMS. Seem to remember seeing 40A discharge, but 100A charge, which doesn't seem right. However, the inverter max charge setting is 50A I seem to remember.

LS kicks in at 2200 so I will get the owner to try that.

Also remember with 1 battery the owner can only get 50% draw from that dyness (hence the 0.5c). So if its a 4.8kwh battery, that max will be 2.4 and if 5.12 it will be 2.56kwh (in terms of managing load during loadshedding)

Under battery charge menu there should be a gen charge tick box, you can untick it there and then untick any entry in the time of use that has gen charge. Grid charge is fine to leave ticked if the owner wants to use the grid to charge the battery.