This finds rebates on a large variety of energy saving projects. Enter your zip code, and Energy Star returns a list of available rebates in your area. This is hard to find on the EStar site, so...
On-line calculators to estimate current and past values of the magnetic field.
This program creates sun path charts in Cartesian coordinates for: (1) "typical" dates of each month (i.e.; days receiving about the mean amount of solar radiation for a day in the given month); (2)...
This programs derives a table of secular change in magnetic declination for a specified point in the conterminous United States. It utilizes the USD polynomial & the IGRF spherical harmonic models....
PVWATTS calculates electrical energy produced by a grid-connected photovoltaic (PV) system. Researchers at the National Renewable Energy Laboratory developed PVWATTS to permit non-experts to quickly...
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