We have purchased a lifepo4
pack of 8 x CALB 100AH cells. Hopefully I will get them installed in the next few days! Battery
I am trying to work
out how to setup the Bluesolar MMPT 75/15 regulator
and the Victron BMV 700 to get an accurate SOC etc with my charging
profiles used and add a low voltage disconnect using the BMV at about 20% SOC. If I could get some help with the specific values for parameters for our setup it would be most appreciated as this will be our first experience with lifepo4
. Our chargers and profile settings will be:
- Redarc BCDC1225 set to "AGM/GEL". Max charge: 14.6v Float: 13.3v (used when moving to and from locations, will manually turn this off at times on long trips if needed)
- Projecta mains charger
set to "GEL". Max charge: 14.1v Float: 13.7v (used occasionally when preparing for trips to get Fridge cold and/or charge battery. “Float” high but will not be left on for long after charging
- Victron MMPT from solar
set to something appropriate for my setup like Max charge: 14.0v Float: 13.2v (I think I should leave "absorption" off)
Victron seem to recommend the following for BMV70x. "For “solar systems” it is recommended 0.3v below “Absorption” voltage and “non solar” 0.3v below “Float” voltage. As my MMPT can create a profile maybe I set it for the Redarc “Float” level. Therefore 13.3 – 0.3 = 13.0v. Therefore the Victron BMV700 values for our pack would be:
Charged voltage: 13.0, Tail Current
: 4% (use default) , Charged Detection Time: 3 min (use default) and Peukert Exponent: 1.05 (lifepo4 recommendation). Do these seem reasonable in my case or should the charged voltage level be higher?
As I can program the MMPT, what would be the recommended values to start charging with solar
What parameter values should I set the LVD at to get a disconnect at about 20% SOC?
The LVD will be turning ON/OFF via this BCU connected to a latching relay.
BMV Manual: https://www.victronenergy.com/upload...S-SE-PT-IT.pdf