Renewable Grid-Tie Energy System
Minimum System Size Calculator
How big should your Grid-Intertied home power system be?
This calculator will give you an approximate system wattage so that you can get an idea of cost and components needed for your system. Please work with experienced Wholesale Solar staff to design a system which fits within your budget and can be expanded as needed.
For an approximate system cost please see our Grid-Tie System Cost Guide
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SUN HOURS/DAY ZONE MAP
How Many Sun Hours a Day Do You Get?
Zone 1 6 hours
Zone 2 5.5 hours
Zone 3 5 hours
Zone 4 4.5 hours
Zone 5 4.2 hours
Zone 6 3.5 hours
The figures at the left indicate the average (over the course of the year) amount of insolation (full sun hours) for these zones. These figures are based on the yearly average; consequently, systems based on these figures will provide more power in summer and less in winter. Winter figures for daily solar gain may be from 25% to 50% LESS than these average figures. We do have additional insolation data available for other parts of the world;
e-mail us the location of your solar project.
