Claire, I would have to recommend against your conversion. I've built and used a electric motor
driven, DC system for about 3 years. I didn't have a generator
, so i had to use a DC motor. .75HP motor was not quite enough to push the adequate flow accross 2.5x40" membrane but was drawing a lot of electricity. End result was clogging of pressure vessels ports
, high salt passage
300-450PPM, and a lot of failures with high pressure SS hoses, and fittings.
Ive since converted to an engine driven cat 290 car wash pump, and Ive been very happy with production. I am able to run the watermaker
without the feed pump, I don't have a clutch
so I install the belt every time I run the watermaker. I run it 2.5 hours per week, and keep the engine at 800RPMs This gives me 3+ gpm of brine for 40+ GPH of product. Pump is very "thirsty" as it draws about 10 Inches of vacuum. Its mounted below the waterline, but shares a 1" intake through-hull with engine raw water
I do have a bypass regulator
installed but its not really doing anything. My engine runs very smooth at idle. Im using a needle valve to control the system pressure.