The title of this post should probably be Webasto Heater Update. But the real topic is voltage. Anybody out there ever feel like they are cursed to learn things the hard way? I must be, because I learned about the wrong way to run a float charger last winter. You can’t just leave them connected and expect the battery to stay up in use – they don’t work that way. The circuit needs broken every discharge cycle to re-start the top-up. If not, the charge indicator just stays green while they discharge! This behavior is confirmed with a 2nd charger employed in exactly the same wrong way.
So the Webasto implication is simple: Like most forms of portable electronics, they work much better on strong, charged batteries. A green LED indicator means good one time only, in actual practice – use a voltmeter, if in doubt! Problem solved with a plug switch on the charger. Run the heaters, reset the charger. Duh.
