Solar Rater - Sizing A Solar Power System Has Never Been Easier!
Solar Rater makes it easy to determine the solar energy potential for any location on Earth using your Android phone, and it calculates the appropriate size for a photovoltaic (PV; solar power) system at that location.
Pricing: Solar Rater (free); Solar Rater Pro ($4.99)
Shipping: Digital download to Android device immediately after purchase.
Links: Product Details | Download Free Version