Here is some detail of the test I did at home to see if the two 100s did it too or was it just the 250. I see I ran the two 100s as a bank, so not individually as I reported earlier. Batteries were full at beginning according to 0.5/100 method the day before.
Method was use the full kettle with cold water till the kettle clicked off, boiling. Then dump the hot water, rinse with cold, and refill with cold for next run. Numbers from the Trimetric. I took turns so each had a little rest before its next run.
Runs in sequence for the 200 and 250 showing: before start voltage, initial voltage after start (the drop), and voltage when kettle clicked off, immediate bounce back voltage, and time of run. (Time variations probably due to different water temps at start)
Kettle 90 amps was 45% for the 200 as rated, and 36% of the 250. EDIT- when it happened earlier when camping, it was with the whole bank so 90 amps was then 20%.
Run 1.
200- 13.4, 12.4, 12.1, 12.9, 9 minutes
250- 13.0, 11.9, 11.9, 12.9, 8 minutes
Run 2
200- 13.0, 12.1, 12.0, 12.8, 9 minutes
250- 12.9, 11.9, 11.8, 12.8, 10 minutes\
Run 3
200- 12.9, 12.0, 11.8, 12.7, 8 minutes
250- 12.8, 11.8, 11.6, 12.5, 10 minutes
Run 4
200- 12.8, 11.7, rapid drop to 11.1, 3 minutes inverter quit 10.3v
250- 12.7, 11.6, rapid drop to 11.1, 4 minutes inverter quit 10.3v
Separated the two 100s and resting no loads --45 minutes later-- voltages : 250- 12.77, 100(1)- 12.76, 100(2)- 12.82
( 13.0 is full, 12.4 is 50%, 12.7 is about 75% resting.
Notes:
Run 4 initial voltage drop seemed ok, but then the running voltage drop fell right off
Run 3 showed first sign of trouble with the 250
Similar results for the 200 and 250 but with 45% vs 36% draws indicate the 250 is in worse shape than the two 100s? But they all did it whatever shape they are in.
One of the 100s might be in better shape than the other based on the 45 minute bounce back voltages.
