I’m trying to understand what the MK3-USB and Cerbo GX switch setting of “Inverter Only” does
when connected to Multiplus. The physical switch on the unit only has On/Off/Charger Only, and the manual documents these setting. It’s not referenced in documentation.
I’m trying to get to a situation of “Inverter on, with passthru and charger off” but it looks like “Interver Only” doesn’t offer passthru
Have you tried to put it in charger only and reduce your current limit to 0?
Interesting concept, I’ll try “Inverter ON” with Charging current 0, that should give me Inverter protection, with passthru, and no charge
Well you can do that but that is not what I suggested. When the inverter is in Charge Only, you get only pass through power with no inverter function. The Inverter will only charge using the ac input current limit that you set. to include no charge function when set at 0.
Inverter only, will drop the grid connection, so it can neither passthrough nor charge. Other chargers (PV etc) can still charge, but the multi can’t. Loads are driven from battery or other DC sources.
I think the only way to have pass through with inverter on and no charge is to set the Multiplus to “On” and go into the Multiplus settings using the Mk3 and disable charger (uncheck enable charger) or set charge current to 0.
Yep, I’ll agree. I have the MK3-USB and do that today. I’m looking for a way to do it from the Cerbo GX that’s in the helm. I don’t want to leave the helm to shut down the “Charger” that is located in the salon.
That is one thing that as far as I know can not be done natively from the Cerbo GX.
If you want a project, there is an assistant tjat can be programmed in the Multiplus called “charge current control”. You need to set a switch on the aux input on the Multiplus and configure the assistant to have 0A and say 90A charge currents, 0A below 2V and 90A above. The switch could be one of the Cerbo relays.
