Hello. Recently purchased a custom built Class B. 4 100ah Lithium batteries (Battleborn), 400w Solar, DC/DC charger, 3000w Inverter, BMV-700 (all Victron). Discovered the BM shunt was wired backward, showing usage when actually charging and vice-versa. This was fixed yesterday. Other than getting bad readings for watt usage, amp usage and projected battery life, would the mis-wiring impact the actual generation and storage of power to the batteries, or was it just a BM readout problem?
if all you did was get load and Batt swapped, with the shunt in the -ve side, then no problem. this is easily corrected. No long term impact.
Thank you! While it was Mia-wired, was the charging system operating properly or was it being mis-led by the readings and incorrectly providing charging?
While BMV-700 was mis-wired, was the inverter and solar system performing properly, or did the “backward” readouts noted on the BMV also cause a charging problem? As soon as I corrected the problem, I noticed that the daily charging activity on VictronConnect was very stable, moving from bulk to absorption to float consistently day to day, vs. running on bulk almost all the time prior to correcting the issue.
Hi Tom,
I can’t say on that, as this is a situation I’ve never studied or tried in detail.
From what you report on the system staying in ‘Bulk’ mode this would suggest that the wrong SOC information was holding the charger in that mode. With lithium this won’t affect the battery like it would with lead acid, provided the Absorption voltage was set correctly. It may even be beneficial, in allowing the batteries to fully balance.