Yes, friend of mine who had and has V8 petrol American Cobalt ski boats has blowers fitted as standard. When you turn the ignition to 1 the blowers fired up and it is recommended to run them for 4 mins before setting off, and us the manual fan at tick over and low speed.
This is the risks of vapour associated with inboard petrol tanks and engines.
For you trev, I guess what you do will need solar power to run. Look at the Ctek solar range, you put it between the panel and you battery to ensure you don't over charge them.
Rob