Mark,
working from Melb for the time being. I have resolved the Lithium charge issue. Spoke with a different tech at ITECH yesterday and he suggested just using the charger that achieved the 13.95V charge, on each of the other batteries. Got me thinking this was the Victron 30amp unit with single output. I was also using another Victron 30amp unit but it has 3 outlets. Penny dropped there is only 10amp/leg on the second one, so made up some new leads last night and hooked the 30amp unit to the second battery, and the second 30amp unit with three legs to the 3rd lithium and left overnight.
Bingo, battery 2 charged to 13.9, battery 3 charged to 13.9, so came down to state of discharge and inability of a 10amp charge rate to lift the baseline. Currently charging battery 4 with a 30amp Victron and expect all resolved. Checked the Optima this morning also, with the new ground isolation switch in place, sitting at 13V after 2 days, has not budged - great when a plan comes off.






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