there are a ton of suggestions/how to's on this that expand on what Jake said. You DON'T want to mount to the hull and the best way that I've seen is to glue blocks to the hull then a mounting board to the blocks. Attach the charger and amps to the board. That way, you know for certain what you're screwing into/thickness/etc. I think a lot of guys have bought a cheap plastic cutting board from WalMart.