No they won't move. Smaller batteries never moved in Portgarth.
Other vessels will be far more concerned about my bow wave
I've made a shield over the gears so that when water gets in it is not distributed everywhere but will just trickle away to the volumous keel for evacuation by bilge pump
The ESC''s are waterproof and fan cooled but to be honest I doubt they will break sweat. Anyway they are fixed with double sided tape to the hull skin that will also be cold.
The battery tray is overly long to allow for balancing fore or aft.
Probably load test this Saturday