I am installing a (new out of the box) Multiplus II 12/3000 on my boat. I have only connected the DC plus and minus (in order to setup the Multiplus before connecting AC). As soon as I connect the DC breaker, the Multiplus trips the battery shortcut protection. The Multiplus on/off switch is off when this happens.
Any ideas?
Thanks,
Villy
PS. It's not reverse polarity.