OTRwSolar
Solar Enthusiast
- Joined
- Apr 5, 2021
- Messages
- 208
I'm used to using standard RV converters. Their charging curves are very linear from 0 to 100%.
Just installed a 12v Victron Multiplus II 3000 (charging 304ah 4s EVE cells via a JBD 200a BMS). Set the battery type to lithium, fixed mode, absorption 14.25v, and float 13.5v. Charging is very linear as battery voltage approaches 14.25v. The LED charge indicator goes from bulk to absorption.
However, when charge current drops to approx. 2-4a, charge voltage suddenly spikes causing the charge current to increase to 10-12a. You can hear the Multiplus hum slightly louder at the same time. This current spike subsides within a few min. leaving the battery at a final voltage of 14.50v.
Thinking this was a fluke, I discharged the battery approx. 2-3% and charged it back to 100% 3 times. Did the same thing every time.
Is this normal charge behavior for the Multiplus 3000?
Just installed a 12v Victron Multiplus II 3000 (charging 304ah 4s EVE cells via a JBD 200a BMS). Set the battery type to lithium, fixed mode, absorption 14.25v, and float 13.5v. Charging is very linear as battery voltage approaches 14.25v. The LED charge indicator goes from bulk to absorption.
However, when charge current drops to approx. 2-4a, charge voltage suddenly spikes causing the charge current to increase to 10-12a. You can hear the Multiplus hum slightly louder at the same time. This current spike subsides within a few min. leaving the battery at a final voltage of 14.50v.
Thinking this was a fluke, I discharged the battery approx. 2-3% and charged it back to 100% 3 times. Did the same thing every time.
Is this normal charge behavior for the Multiplus 3000?