Minimum charging current for 50AH 12V LiFePo4 battery?
I'm looking at building a modest solar battery-backup system based on:
100W flexible Renogy solar panel
12V / 50Ah Renogy LiFePo4 battery
Rover Li 20A Renogy MPPT charge controller
What is the MINIMUM safe long-term charging current for a 50AH / 12V LiFePo4 battery?
The 100W panel is rated for about 5.3A under ideal conditions which would be 0.1C, but in winter / cloudy conditions the 100W-rated panel might put out only 0.5 to 1A for extended periods.
Is it OK to charge a 50AH / 12V LiFePo4 battery at only 0.01 to 0.02C for extended periods?
(For example, days to weeks during extended bad weather in the winter months?)