8 Jan 2018
**06/01/18 @ 17:13**
Given the dire situation of the batteries having about 20% of their capacity the issue would seem to be sulfation although stratification of the electrolyte could be a problem with low use.
Will post comments about action taken from today 6th Jan 2018 until I reconfigure the Victron MPPT then will revert to https://calstock.org.uk/elf.php/2001/01/01/rolls-batteries
I've ordered a Victron Direct to USB cable so that I can configure the MPPT controller. I'm thinking of starting the absorption level at 14.95v and the float at 13.92v, and set the absorption time for 6 hours. Then I will set it to equalise at 15.64 for 3 hours every two weeks.
I have these figures OKed by Phil at Bardens
Sadly DPD, again, didn't get to me yesterday, with the same old excuses, so now have to wait until Monday 8th.
So today I rewired the solar panels such that I can easily bypass the controllers and feed direct to the batteries. Further I can run two panels in parallel or series to boost the input to one set of batteries or the other.
Today I bypassed the Victron to the main batteries and had a voltage of around 14.9 to 15.4 for some 4 hours. The maximum current would have been around 3 amps per 120Ah battery. So only 12Ah per battery. Now I can the problem that has been accumulating.
1. The batteries may not have been charging fully on 14.4v absorption for a few hours most days and
* Given the winter, on a good day like today there vis hardly enough input to run 3 amps (from two batteries) for 8 hours even given the bulk charge before the equalisation charge