The "EZ Calculator" provided by SHARP uses your zip code and current electric bill to create a solar system simulation.
KYOCERA
The PV Calculator is a tool to help you determine the variable costs and benefits of installing a photovoltaic (PV) power system at your home or business.
BP
And an Enviromental aspect… Find out your size of the carbon footprint with BP Carbon Footprint Calculator. It is just something relaxing between the heavy calculations, or not?
Calculators by the Infinite Power of Texas (Not a manufacturer but has a very useful information!)
Use this Solar Water Heating calculator to explore the energy usage of your water heater, and to estimate whether a solar water heater could save you money.
Photovoltaic System Economics calculator gives you the answer if you are thinking about putting a photovoltaic (solar electric) array on top of your house and disconnecting your electric company or of staying attached to the grid and selling electricity back to them. See it here.
Solar is universal & will work almost anywhere….but sun hours differ. Here is a list of calculators & tables to help you to estimate & choose your solar electric system.