If you are moving from a utility-connected home in the 'burbs' to an off-grid home in the boonies, you will have the opportunity (perhaps necessity) of downsizing your electricity usage. In order to calculate how large your home power system needs to be, run the calculator to check . Compare and adjust your plans according to your budget and lifestyle. Please also refer to the daily sun hours in USA if you are USA customers, other customers from outside the coutries, please check the daily sun hours in your coutry. Run the System Sizing Calculator first with numbers from your current electricity usage. You can aslo refer to the eletric appliance power consumption chart (PDF) , The daily energy values listed in the PDF file are for the most efficient units in their class and the information was obtained from Consumer Guide to Home and the General Electric website. Use the power consumption to calculate the power you will need. These figures are approximate an