whoa! i've had to unplug from shore power today and let the solar panels do their thing. They are now in desulfating mode - short bursts into the batteries to break down the sulfated layers.
Its not quite 400w, 380 to be precise. One thing they did was give me a to small fuse wire and fuse (only 15amps) (must have been for 24v) cause although I havnt broken 15amps yet its come close and those wires are very warm!
Mounted on top of my dodger, both panels take up a combined 1.6m2. They sit above our rain catcher with nice airflow underneath. I mounted them so there is only chance of one