Victron stuff is nice, but like much of the rest of the solar industry, they nickle and dime you to death.Still need to wire in the smart shunt and the rest of the 12v system, kind of pissed that absolutely none of this stuff came with teh VE Direct cables. WTF. How does the cerbo GX not come with VE cables?! So dumb.
The BMS shuts off charging, the SCC still thinks it needs to shove max current and keeps rising the voltage in an attempt.I mean, how else would I fully charge these. A traditional charger? I don't have AC. I mean I guess I could run a generator for a few hours but they both read 12.8V or so when disconnected.
Is the voltage spike the output of the MPPT? How would a battery BMS cause a voltage spike?
I mean, how else would I fully charge these. A traditional charger? I don't have AC. I mean I guess I could run a generator for a few hours but they both read 12.8V or so when disconnected.
Is the voltage spike the output of the MPPT? How would a battery BMS cause a voltage spike?
The BMS shuts off charging, the SCC still thinks it needs to shove max current and keeps rising the voltage in an attempt.
Check your inter cell connections, you have a picture of the setup and wiring? Any cheap circuit breakers?
Measured impedance and its .1ohm.So no smart shunt installed?
Can you measure the impedance of the battery + terminal to the MPPT battery + terminal?
Another option is measuring the battery terminals to verify if they are seeing the voltage spike.
The controller may think the battery terminal is climbing, but if there is a bad connection the actual battery terminals may not be climbing as high.
If the terminal voltages are seeing the spike in voltage which is most likely, you’ll have to lower the voltage settings, the SCC should throttle back current so the BMS high voltage disconnect never operates.
Just an idea.
Also mad props for spending what $1000-$1500 in Victron gear for a <700w PV system. When are you ordering a 3k Multiplus?
That’s odd. Both batteries read 13.13v when disconnected but when I hooked them up individually to the SCC it’s saying it’s 12.8V which I verified on the terminals.Have you tried to draw any load on the batteries to bring their state of charge down?
What does the SCC show for voltage if you shut off charging on the main screen?
Terminals of the SCC or the batteries?
First connection to the battery should be the SCC, then you could double stack the inter battery connections.
Again cross up that negative SCC lead to the bottom battery negative terminal.