25/02/2023
This is the only way to properly test an AGM/Deep cycle or lithium battery.
Constant load over time at either a C5, C10 or C20 rate. These two batteries tested good with a quick battery test. The left one has 28Ah capacity, the right still getting tested.
Now I’m a bit concerned as the batteries aren’t that old and the charging/cutoff system is working fine.
They do hold their surface voltage very well up until they just die.
If you want a battery tested properly I can load test any system up to about 50A constant and 66A maximum short time test. I can only test 12V batteries currently.