Gross Capacity 7.5 cu.ft. The system was designed to power our energy efficient ConServ refrigerator, and our computer, scanner, and printer.
Any extra power goes towards our household loads.
Most of the summer, just the solar array was able to power these loads without difficulty, and without draining the batteries. We put the Air 403 up in a weekend in autumn , and were initially disappointed. You could hear it just a little bit inside our house, but I'm sure if it were mounted to our shop or house, it would've been much noisier. I'm pleased with the system's performance, but I do plan to add more solar modules as soon as I can. My house faces due south, and an additional row of solar panels above the existing modules or on the shop is very easy to envision .