Mex's 20% AGM Rule Sucks.
Mex says deep cycle AGMs need to be recharged at a 20% of Bank AH rate even if they are not Lifelines (which do specify that). My AGMs are not that brand, and no mention is made of a minimum charg...
Forum Discussion
pianotuna wrote:
Hi,
At -15 c charging voltage should be about 13.99 volts; gassing 16.86
At -10 c c v should be 13.92 volts; gassing 16.86
at 25 c c v should be 13.5 volts; gassing 14.34
at 45 c c v should be 13.26 volts; gassing 13.89full_mosey wrote:
My log shows a temperature range of -13 to 45C for the bank in the van this year. Try to pick a fixed ABS Voltage/Current for that!
I can say without looking that the ABS at -13C was 15V because I set that as max. On 2018-07-20, the charge controller set the ABS at 12.89V based on the the battery temp of 45C which is 20C above a baseline 14.4V at 25C. Actually, charging was suspended as the Amps logged were 0.002415771484375 which is essentially zero.
HTH;
John
My bad. I stand corrected.
The log entry dated 2018-07-20 17:03:00 was showing Float stage set at 12.89V(13.5V - 20C * -0.03V/C=12.9V). The battery was higher at 12.91V giving 0A float charge.
HTH;
John
