I put the alt kit on first month on purchase.. the install is not that involved and would be glad to help you through it.. as for submurged.. I ran up a creek up to the doors, in the snow, psi wash it down and no issues.... even if I did fry it I crossed the part # of it to cross to same one off a Kabota tractor recon available from auto zone for around $70...also second battery should be the same rated cca.. so yea kinda looks like one could with some work squeeze one under the seat.. but why fight it..its unfortunate that the stock krx rectifier won't sustain the draw of the accessories but my dealer was upfront about that on purchase.. if your anticipating a blower taking the pto space.. my take.. by the time they ever come out with a blower kit and at what cost.. you maybe able to trade up on a new release machine that Is already turbo'd .. my alt kit has worked solid.. I run extra lighting, stereo blasting, amps, sub, heater kit on, wiper motor, rugged,,without a second thought.. I never have to worry about a low battery and seldom bother with the tender..