11.6v is well flat. See attached State of Charge (SoC) chart. (Below about 12.3v to 12.4v & you are into significant battery life shortening territory). These are 'rested voltages'. i.e. taken with all loads removed & having let the battery sat for half an hour or so. The readings you have are not very meaningful if taken with the fridge running or any other loads connected....... but your figures are still sufficient to indicate that you are using more than your single panel can replenish.Originally Posted by rafa
Hmmm. Battery never got over 11.6v today and panel produced 42ahr.
Reply With Quote