This is my small project, got 8 pcs used CALB cell (100Ah, test them got 70-80Ah), make the 12V banks for 12V pump to fix underground water problem.
So, the 12v bank has about 150Ah capacity, I can put on 100W x 3 panels in serials for it. However, seems like the controller will not pull out full juice from the panels into the battery.
I have cheap MPPT controllers, MakeSkyBlue and ESmart3. with setting:
Absorb voltage: 14.4
Float voltage: 14.4
Equalize: 0 (MakeSkyBlue has only option for Li, which I believe for Lithium ion, it just Absorb = Float. ESmart3 has little more option)
The max watts was around 125W, the only way I can pull out more is by increase charge Voltage, 14.6,14.8,.... but of cause it will be too high for LifePo4.
Both controllers work well with my 48V battery bank. But, Seems like they are not so friendly for 12V large capacity bank.
I searched for more information, those RV battery bank (12V system) seems all with Victron or MidNight. On youtube shows charging 12V banks in high Amp. And the MakeSkyBlue and ESmart3 are all with 24 or 48 volt banks.
In my project, I was looking for charge capable around 20A.
So, Which charge controller shall I looking for? or which controller can charge high Amp for 12V large capacity banks? Epever? Victron and Midnight just too expensive.
Thanks
So, the 12v bank has about 150Ah capacity, I can put on 100W x 3 panels in serials for it. However, seems like the controller will not pull out full juice from the panels into the battery.
I have cheap MPPT controllers, MakeSkyBlue and ESmart3. with setting:
Absorb voltage: 14.4
Float voltage: 14.4
Equalize: 0 (MakeSkyBlue has only option for Li, which I believe for Lithium ion, it just Absorb = Float. ESmart3 has little more option)
The max watts was around 125W, the only way I can pull out more is by increase charge Voltage, 14.6,14.8,.... but of cause it will be too high for LifePo4.
Both controllers work well with my 48V battery bank. But, Seems like they are not so friendly for 12V large capacity bank.
I searched for more information, those RV battery bank (12V system) seems all with Victron or MidNight. On youtube shows charging 12V banks in high Amp. And the MakeSkyBlue and ESmart3 are all with 24 or 48 volt banks.
In my project, I was looking for charge capable around 20A.
So, Which charge controller shall I looking for? or which controller can charge high Amp for 12V large capacity banks? Epever? Victron and Midnight just too expensive.
Thanks