Can the van not charge it.
Yes but not enough between November to January.
That happens here, but quick plug into garage and my onboard 10amp charger brings les and starter bats up, very seldom have to mind you, i like winter driving away to qt places.
I was wondering about my Probat too now it is 3 years old, though linked to an even older Yuasa LB. They still seem okay and do not normally drop below about 85% as we are very low power users and solar tops them up. I'll do a capacity test out of interest when I get chance.
My probat voltage readings were very high usually 13v hours after it got dark,but a 4 amp load would see 11.9 after three hours use.For the price I was happy with my purchase.I was wondering about my Probat too now it is 3 years old, though linked to an even older Yuasa LB. They still seem okay and do not normally drop below about 85% as we are very low power users and solar tops them up. I'll do a capacity test out of interest when I get chance.
I've said this times and you've demonstrated my point somewhat. It's impossible to have one battery at a higher voltage than the other when they share the same connections. They MUST balance and mixing batteries of different capacities isn't an issue.
I have an Autool BT360 battery tester which uses a conductance / AC impedance method to calculate internal resistance.
I was sorting of hoping you'd got one of these, I'm thinking of buying one and looking for an opinion!!