Our recommendations when it comes to system sizing is this:
Sit down and list everything that you would ever want to run from your power inverter. Once this is done, look for any appliance with a power rating above 2000watts and strike these off your list (or be sure to include an AC generator in your system).
Then look for any appliance between say 1000 to 2000watts, and work out how essential each of these items are.
It is easy to record the power output of each of your appliances on our appliance usage chart on page 28. Now for the important part; how long will you realistically want to run each appliance over a normal day (if you overstate your true requirements here, your system can become over sized, and cost far more than necessary). For help in sizing your system, have a look at our usage tables at the back of this catalogue.