RoyB wrote:
I'm down to two 85AH battery now after 6 six years of use and trailer is still buttoned up. Planning on setting up again in a couple of weeks here.
...
Roy Ken
Those may not be 85AH any longer. A load test will be needed to estimate their current AH capacity, but who cares?
Yes, what really counts is whether you get a days work out of your batteries.
Are you sure you needed 4 x batteries at the getgo? Would you be better off on 2x that last 3yrs or 4x that last 6yrs?
The life cycle tables for Lifeline AGMs are based on 80% of capacity being end-of-life. If you buy enough batteries you may never reach 80% for rest of your life! :)
I cite my bank as 189AH, but in no way do I believe that is their capacity now. I get a days work in a day. I will be running load tests soon to estimate their capacity.
The youngest battery is in its forth year. I prefer to replace frequently over carrying a large bank. The three AGMs refuse to die so I can test my replacement theory. Maybe my 3x battery, 189AH bank is too big.
HTH;
John