battery charging

Hi, somewhere within the solar-Setup is a faulty part. But I can’t figure out which and where. Maybe you guys can help. Very much appreciated as usual!! • Solar panel (maybe 100W) • Solar controller (of of these typical blue ones) • 2 additional maintenance-free batteries joined with heavy duty...

I need to ask a basic question about charging the batteries in our stock standard 2015 Expanda caravan. Does the stock standard Expanda come with a DC to DC charger which I gather is what should Be used when charging from a car? Recently we upgraded our tow vehicle to a new Patrol which i got...