Installed the pumps in both boats last weekend. Ended up buying a submersible pump which has an automatic checking function. Every 2.5 minutes it spins the impeller for 1 second and if it detects resistance (water) then it keeps going until the water is pumped out.
Installed the prijons behind the seat and outlet on deck on starboard side the perception is in between the footpeg and the bulkhead. Batteries in both are in the "dry" sections or holds. The beauty of this system is no electrical joints or contacts in the cockpit. The pumps draw .02 amps in checking mode and 1.9amps running, both are 500gph pumps. Battery is a 2.2 amp per hour which should give 1 hour of pumping or I am guessing about 20 - 30 cockpits worth.