I have set up two systems on EasySolar II GX (Multiplus II GX) with a 5kWh LFP battery.
The one is running ESS, the other just a Virtual Switch rule.
For the reasons that were mentioned (from) a lot here, that the Inverter always feeds-in some W and Wh to the grid, when a high load switches off - and I do not want any trace of it to the grid meter - I usually run them in offgrid (while the sun is shinning). For the ESS system, this is “Inverter only” selection for MP II. When SOC goes low, I manually switch to “On”, thus the battery is sustained to 30, 40% (or whatever “Optimised” directs it to…).
[for the second system I am auto doing this with Virtual Switch (for SOC <40%), for the ESS need to figure how to do it auto, through NoteRed - this is another cup of tea]
Last night, the battery dropped from 40% to <10% very steep, something not envisaged (that’s another question - topic), so the morning came with a Low Bat shutdown. The sun was far from being able to revive the battery, I had physical access to the inverter, so I needed to select “On” mode, thus to be able to connect to grid, provide power to house and charge the battery to minimum SOC.
But I could not. WiFi was down (all systems not powered), and anyway I doubt I have access through LAN, when in shutdown. I tried to cycle the power physical switch, to off, then to on, but MPII has “memory”, wakes up to “Inverter only” and does not engage the grid relays. I did bt VictronConnect, but I do not have any real control there, only option is a link to VRM portal, where of course there is no connection to the inverter.
I had to make a hardware bypass cable, to feed house from grid and wait for the sun to rise to charge the battery. I am thinking a spdt mains switch, to select MPII-0-Grid, in (future) cases of MPII failure.
How can I access settings (Inverter control) from bluetooth VictronConnect, when in such shutdown condition?
TIA