Yeah, I know my usage pretty well. LOL! This won't be to cover normal usage. This will be to cover future convection oven use. I'm a weekender so I don't need much. From BFL' calc's this should even work in the winter. There is one campsite where morning fog can be an issue at times but usually when we go there's full sun. Honestly, 300W is probably more than we need BUT that amount will make up for less than ideal conditions and still perform in the winter too. Typically, our usage is under 70Ah per day but we have used over 100 before. This rig has some serious parasitic draws that don't help much either (3.6A just from the entertainment centers). I do have a couple of wireless on/off power strips to turn off the larger draw items overnight. I've got enough battery to cover them but I just to don't like the idea of that much draw just when it's doing nothing.