Growatt Inverter (SPH6000 BL-UP) any way to put into standby and then turn back on?

I am fairly new to HA, and have my HA connected to Solar Assistant via MQTT. I also have the Growatt integration. These all work fine.
However my inverters (I’ve 4 in parallel) are playing up and I need to put each one into standby mode, and then turn them back on again. I can do this via the ShineApp, but I’d like to automate it , as this resetting needs to be done in the middle of the night