mounting solar panels

It means you always have to park your van in the sun. Also, you have to make sure you have the right type of cell because if shade hits any part of one of the types (mono or poly...I forget) then all the charging stops. Cheers.

wallabyjack5 its all about amp hours out against amp hours back into your batteries, I am currently using two 110watt panels fixed flat to the roof of my new caravan but I also reduced the overall load by having it fitted with all LED lighting and only use the inverter when needed. Only done one trip away for two weeks with it and it was mixed with overcast days and full sun days but never looked like having any low power problems and that was all bush camping in the one spot with no mains power.
Rule of thumb for me has always fit as many panels as you can and as big as you can with the right solar regulator batteries will never be overcharged but more importantly your batteries will last longer as they will be topped back up to max each day regardless of sun conditions.
I have room for one more panel on the roof but at this stage my daily discharge is no where near draining the batteries to harmful levels.

Cheers
Treker