6-55 ah batteries in the house bank currently? Those are small batteries commonly seen on scooters. A group 24 battery is usually around 75 ah and they are pretty small. But they will be changed as you state.
The washer is the big hit. I think your numbers are a bit low. I would figure on a factor of 10 for the inverter - in other words 1000 watts takes about 100 amps @ 12 volts. That translates to about 162 ah per load.
1 hour twice a day with your existing alternator is 160 AH - almost enough for a load of clothes. If the alt outputs 14 volts plus you probably don't need a separate regulator. The battery bank will accept whatever it can put out up to about 80% soc. At 2 hours a day you won't get to 80% charge with the engine alone.
How many watts of solar panels are you planning for?
I think unless the solar can supply a great deal of the AH you need you will be running the engine more than 2 hours a day.
Now without the washer.....
It sounds like a great trip though.
Living aboard in Victoria Harbour
Last edited by mitiempo; 03-06-2011 at 12:20 AM.