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Home Forums General Discussion Can I stay off grid and break even -with purchased systems? Re: Can I stay off grid and break even -with purchased systems?


You can definitely do what you are proposing to do. Batteries are actually happiest when they are fully charged. You will need a good charge controller to ensure proper battery charging, and management of your dump load. You wil also need to check your batteries on a regular basis (say once every 30 – 60 days). You may want to consider purchasing a generator as well. I would suggest you do not cheap out on a generator, especially since you are likely to be there for a long time. Get a diesel generator that has an automatic transfer switch so that when the batteries get to low when there is no wind, the system will automatically start itself, even when you aren’t around. The dump load can be your water heater for winter time.

As for type of battery – you are also correct that you cannot use car batteries. You will need to purchase probably four or more deep cycle lead acid batteries. When you see them, compare them next to a car battery and it will quickly become obvious why the car battery just doesn’t cut in off grid scenarios!

The pump I use at my house is an AC powered Grundfos SQFlex. It is designed for remote pumping solar and wind operations, and can draw up to 250 ft of head at about 7 amps – which is quite amazing. The trick is to purchase a large enough expansion tank, which provides the needed water pressure for your piping system.

Hope this helps!