Hi everyone,
I installed a brand new Multiplus 12/3000 yesterday with 4 Lion energy 1300 lithium batteries. I used all 4/0 cabling and the ones between the batteries are exactly the same length. I'm currently hooked into a stable 50 AMP plug on my house and have a BMV-712 installed. I also have the Smart Dongle. My absorption and float rates are configured at 13.9. When monitoring voltage from the BMV or the Smart dongle, my voltage is bouncing hard between 13.5 and 14.3. If I change the absorption rate to 14.4 or 14.6 per Lion Energy, my voltage will bounce between 14 and 15 volts. I was told my voltage should be stable and not bounce like this.
Below are the steps of troubleshooting I've been able to do thus far and looking for assistance, as I'm not an expert by any means.
- Updated software to v469
- Turned off 150/100 MPPT charge controller(I don't have panels yet anyway, but just in case)
- Voltage is bouncing at all the batteries with multiplus charging in absorption
- With inverter off, Voltage is stable at 13.6ish volts at all batteries individually and off parallel leads
- Turning inverter back on, voltage bounces again at each battery and main leads from battery to inverter
- Changed absorption charge rate in multiplus settings, 14.4,14.6, etc.. still bounces, but higher
I'm not sure what else to do now and looking for troubleshooting guidance. Should I open up the Multiplus and measure the voltage coming out of the terminals where the battery leads come out of? Should that voltage be stable?
Thank you,
Dale