Advice on Lithium Solar setup
Hello, I'm about to move into a conversion van full-time, 80% boondocking, and would like your advice about what I'm planning. My electrical requirements won't be much. I don't expect to use more t...
Forum Discussion
brulaz wrote:Itinerant1 wrote:
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Brulaz if you haven't seen this post at the airstream forum it might help with your questions. Around post #31 is where a Battleborn partner starts to explain/ answer questions.
http://www.airforums.com/forums/f449/battle-born-lifepo4-batteries-162132-3.html
Thanks. That's very useful.
It does seem that using a cc/cv power supply or single stage charger set to 14.6V (3.65V per cell) will charge BB to ~95% max, with current tapering off during the cv phase (14.6V) due to increased battery resistance. 3.65V per cell is right at the midpoint of the Voltage versus SOC knee. Here's a generic graph where the cv is set to 4.2V per cell (16.8V for 4 cells):
Apparently LiFePO4 cells can handle over charging to 4.2V per cell without damage or major heat generation.
You can also charge at lower voltages than 14.6V but it will be slower, and apparently reach a lower SOC, and apparently the higher voltages are needed for cell-to-cell balancing in the Battle Born BMS.
This info if used will put an end to lfp much sooner. Never subject the cell to hit 4.2 volts.
