>It sounds like you don't experience much battery drain from hotel loads at anchor, or you run the generator a fair amount. We use very little DC in the course of a day. The refrigerator uses DC of course, but since we will be replacing it with a more efficient model in the near future that power draw will decrease. (The refrigerator on the boat now refuses to die even though we thought it was on its last legs back in September.) At night we use one or two reading lights and that's it. We don't use the electric anchor light, not because of the current draw but because we prefer the wonderful oil lamp a friend gave us for Christmas many years ago. The stove/oven is propane. We'd like to replace the reading light bulbs with LEDs but they do not make them with the big screw bases that our 1973 vintage lights have. We typically run the generator for about 45 minutes once a day when we're out if we're not going to be running the main engines. This heats water for showers and washing dishes and throws some charge back in the batteries. But doubling our house battery amp hours would be nice even though it would only be 400 ah or so. We learned to be frugal with DC on the narrowboats we hire in the UK, and this habit has carried over into the way we boat here. So we don't anticipate ever using any more DC on a daily basis than we do now simply because we'd have a bit more reserve. ____________________ C. Marin Faure GB36-403 "La Perouse" Bellingham, Washington