Hello community. I come to you because 6 weeks ago I changed my agm battery to a lifepo4 and the mppt has since used to switch to Float when the battery is not full.
I bought the 230ah battery from an individual who built them himself for use on a motorhome, so with a Bluesolar 100/30 mppt.
The problem was presented for the first time in factory settings wheel number 7. So I bought a ve.direct cable and carried out several test settings but the problem persists. Example today :
absorption 14v and float 13.40 settings re-bulk 0.11v: 3 hours of bulk then switch directly to the float
Basically it's been since I have this battery that I have never managed to fully charge it, except yesterday with the following settings: absorption 14.20 and float 13.60v, however arrived at 100% of the battery the mppt remained in absorption and created an overvoltage on one of the cells (3.92v)
If I manage to go up to 100% charge (13.3v) the mppt does not cut and in this case remains in absorption. This creates an overvoltage on cell number 2. Moreover, even after the security lockout of the bms the mppt remains in absorption.
The BMS is a JBD 150A
I unfortunately tried to lower the absorption to 13.80v which results in an immediate switch to absorption at sunrise and causes a little later the switch to Float while the battery is at a fairly random percentage (the mppt has already gone to Float at 40% battery capacity).
I post some pictures of my bms settings.
I need you help, the winter is coming and im 100% dependent on solar
Thanks for any help or any tips for résolve this problem. Peace!
( This post is translated to french sorry for syntax errors)
Solar panel : 2*240w BPSolar 24v
Victron mppt Bluesolar 100/30
Bms JBD 150A for 4 cells "grade a+"
I bought the 230ah battery from an individual who built them himself for use on a motorhome, so with a Bluesolar 100/30 mppt.
The problem was presented for the first time in factory settings wheel number 7. So I bought a ve.direct cable and carried out several test settings but the problem persists. Example today :
absorption 14v and float 13.40 settings re-bulk 0.11v: 3 hours of bulk then switch directly to the float
Basically it's been since I have this battery that I have never managed to fully charge it, except yesterday with the following settings: absorption 14.20 and float 13.60v, however arrived at 100% of the battery the mppt remained in absorption and created an overvoltage on one of the cells (3.92v)
If I manage to go up to 100% charge (13.3v) the mppt does not cut and in this case remains in absorption. This creates an overvoltage on cell number 2. Moreover, even after the security lockout of the bms the mppt remains in absorption.
The BMS is a JBD 150A
I unfortunately tried to lower the absorption to 13.80v which results in an immediate switch to absorption at sunrise and causes a little later the switch to Float while the battery is at a fairly random percentage (the mppt has already gone to Float at 40% battery capacity).
I post some pictures of my bms settings.
I need you help, the winter is coming and im 100% dependent on solar
Thanks for any help or any tips for résolve this problem. Peace!
( This post is translated to french sorry for syntax errors)
Solar panel : 2*240w BPSolar 24v
Victron mppt Bluesolar 100/30
Bms JBD 150A for 4 cells "grade a+"
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