Alpine_Junky
New Member
Looking to understand how to set up charge controller -
DIY Battery: LF280K - 16 cell configured for 48V system with Overkill BMS - 18650 Grade A cells
Charge Controllers - 2 Midnight Classic 200's - both running 2 strings of 6 panels rated at 380w each panel (12 panels x 380 = 4,560 watts). Has shunt and whizbang in master controller. One set of panels gets morning sun and the other afternoon. Northern location with crappy aspect...
Inverter is a Schneider 4048 - expect generator run time in winter - paired with Harbor Freight inverter super quiet 9500 genny. Was thinking of adding a better charger down the line if it makes sense -- still sorting through optimal charge rates for gen assisted charging to balance gen run time and battery life.
Understanding Will's settings below - I can easily set the charge controller to these values.
The curve ball that I can't quite figure out how to set up the charge controller. I was able to locate this documentation but its somewhat generic (I believe improperly refers to the BMS doing the charging) https://www.midniteftp.com/support/kb/faq.php?id=75
48V 16S LiFePO4 Battery w/ BMS
If you want your LiFePO4 cells to last a long time, you can set your absorption to Victron's custom LiFePO4 charge profile recommendation:
Float should be 13.6V/27.2V/54.4V
Low voltage disconnect should be 12V/24V/48V
DIY Battery: LF280K - 16 cell configured for 48V system with Overkill BMS - 18650 Grade A cells
Charge Controllers - 2 Midnight Classic 200's - both running 2 strings of 6 panels rated at 380w each panel (12 panels x 380 = 4,560 watts). Has shunt and whizbang in master controller. One set of panels gets morning sun and the other afternoon. Northern location with crappy aspect...
Inverter is a Schneider 4048 - expect generator run time in winter - paired with Harbor Freight inverter super quiet 9500 genny. Was thinking of adding a better charger down the line if it makes sense -- still sorting through optimal charge rates for gen assisted charging to balance gen run time and battery life.
Understanding Will's settings below - I can easily set the charge controller to these values.
The curve ball that I can't quite figure out how to set up the charge controller. I was able to locate this documentation but its somewhat generic (I believe improperly refers to the BMS doing the charging) https://www.midniteftp.com/support/kb/faq.php?id=75
48V 16S LiFePO4 Battery w/ BMS
- Absorption: 58V
- Float: 54.4V
- Inverter Cut-off: 42.8V-48V
If you want your LiFePO4 cells to last a long time, you can set your absorption to Victron's custom LiFePO4 charge profile recommendation:
- 48V Battery: 56.4V
Float should be 13.6V/27.2V/54.4V
Low voltage disconnect should be 12V/24V/48V
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