A quick and accurate solar design software
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Computation of losses in solar wires :
Calculator : AC and DC electrical wire voltage drop and energy losses
SUNANGLES calculates solar angle data based on date, time, and location.. This free and online tool calculates an array of solar angle data that can be copied into spreadsheets and other documents (declination, hour angle, sun elevation, azimut)
Sunangles
Free online calculation and simulation of solar photovoltaic electrical power in Europe, Asia and Africa
Solar electricity simulator : free worldwide online calculation of solar photovoltaic power
EASYSOLAR solar software 7 days trial for free
Solar photovoltaic applications for smartphone and tablet