Mussels wrote:I don't have the stop start, the second battery is also a perquisite of a few other options. The split charge always charges the main battery first and moves on to the second battery and I've found before in winter electric heaters and lights mean there is a net loss sometimes and I'd like to charge up the second battery at home. This may be what prevents my heated screen from coming on sometimes.
I could only get to the negative terminal under the seat so I've connected the charger to the jump start point under the bonnet and it seems to be working. I don't know however if it's only charging one battery or how to check the voltage in either battery independently.
Jump start point charges start battery only.