Hold Charge Function

cjohnstone

Been using WW for just over a week now. Works well with Octopus Agile. Gained a lot of insight into the operation of SHP3600 invertor.

I've been monitoring / logging the invertor using RS485 interface and MODBUS commands. Took a while to figure out the register functions given the multiple versions of Glowatt protocal docs available online. (V1.24 seems to work for me).

My question is regards the wonder watt hold charge function - which register sets this mode? I dont see any change in Inverter mode during 'Hold Charge' periods.

I'm thinking this could be spoofed by setting the Stop discharging register to 100%.

regards

admin

cjohnstone

My question is regards the wonder watt hold charge function - which register sets this mode? I dont see any change in Inverter mode during 'Hold Charge' periods.

For Growatt, it's not a specific mode as such, we really just issue another charge instruction, but set the target percentage to the current SOC, which effectively is a hold in practice.

Growatt is far less susceptible to wobbles in that area, compared to Giv.

cjohnstone

Speedy reply appreciated. That's given me further insight into the inner workings of the growatt inverter. Some more bitbashing inverter holding registers ahead.