hi there!
I upgraded my system with the inverter in the title, and I have trouble setting it up correctly with my system, problems I have so far:
>solar charger will not start charging even though it has energy.
>not sure how to setup batteries, I have lifepo4 ones (4 in series) and they have a rudimentary bms, which is not accessible from the outside, no BT or CAN or similar)
>I decided to keep the solar charger (smart solar 150/70) of the prior system connected, currently it is charging the batteries, but the RS will seemingly randomly shut down
so about the shutdowns: in two days I got the #29 "battery overcharge" error code twice, yesterday noon when the solar charger (of the smart solar unit, mind you) went into absorption mode, and voltage was 56.80V, interestingly the RS showed slightly higher values than the solar charger. also the 4 series 12v batteries were not perfectly balanced yet, I have since installed 3 battery balancers from victron, and they are dead on balanced since yesterday evening.
so the second shutdown was weird though, it happened when there was little to no sun in the morning today, the batteries were at about 75% and the voltage was way off the maximum. this led me to try to dive into the menus to fix the issue, and to try to feed the MPPT of the RS instead, but as initially pointed out, I did not even get it to charge at all, not sure why.
so to sum it up, this unit is a bit weird for me, I used to have a cheap chinese inxiii 2400w 24V inverter which workes flawlessly without a single shutdown since about october in my old 24V system, with 4 of the same batteries.
what's happening here?
two thoughts I had:
>maybe I need to change battery preset to anything but lifepo4, albeit my batteries are lifepo4.
>maybe I need to find a way do disable the BMS? why does and inverter have a bms anyway? I was not aware of this initially.
any hints tips or an outright solution would be highly appreciated. if some pro could give me guidance on how to setup the battery that I have (for which there is not preset) that would be awesome.
I had no issues setting up the battery with the smart solar 150/70, but it doesn't have fancy bms tech, either, does it?
cheers,
bill
p.s.: I can't leave my home rn, as a fridge sits on this inverter, and when it decides to protect me (forced protection seems to be quite trendy these days, especially by governments) even though the BMS inside my german made (no, not german assembled, but german made) expensive lifepos is doing a nice job with overvoltage, overcharge, undervoltage, undercharage, overtemp, and undertemp protection.
p.p.s.: some more thoughts/observations:
>battery voltage measurement is exactly 0.05V higher from the RS than either the smart shunt or the MPPT150/70 during charging, I think it is about the opposite (lower by 0.05V) when discharging, but I will report back on this in the evening. what could this indicate?
>just checked in the RS' history tab, there are three errors, some hopefully due to me installing and connecting things, cause I never noticed them before, the are: #29 overcharge protection (we know this one), #10 battery low voltage (probably cause I disconnected the battery when connecting the balancers) #53 Inverter internal DC level (curious about this one). the main takaway here though is the max recorded voltage of my string of 4: 56.96V, which even if the RS shows .05V more than the other devices, is still "only" 14.24 per battery, which has an end of charge voltage of exactly 14.4V, according to spec-sheet. so again, what's happening here?
> is it possible the RS is not really designed or compatible to be used in inverter only mode, with a separate charge controller like I do? to me it seems the RS somehow "thinks" "look, the battery voltage is rising while I am not charging it, so it must be faulty? better shut it down" and then shuts down..?
