Panel Shading This tool lets you calculate the degree to which parallel rows of flat solar collector panels (solar thermal or PV) shade each other. It can also be used to calculate the panel power, relative to full, direct sun. Please read the important instructions, notes, and FAQ pages before using this tool. You may click on the input labels for additional help.

Beta Release: Please send questions, problems, and suggestions to the author.

INPUTS
panel height		latitude	° North South
panel thickness		show values	None Sun % Shading % Power % Power % (with glass)
panel spacing		orientation	NORTH 5° E of N 10° E of N 15° E of N 20° E of N 25° E of N 30° E of N 35° E of N 40° E of N NORTHEAST 40° N of E 35° N of E 30° N of E 25° N of E 20° N of E 15° N of E 10° N of E 5° N of E EAST 5° S of E 10° S of E 15° S of E 20° S of E 25° S of E 30° S of E 35° S of E 40° S of E SOUTHEAST 40° E of S 35° E of S 30° E of S 25° E of S 20° E of S 15° E of S 10° E of S 5° E of S SOUTH 5° W of S 10° W of S 15° W of S 20° W of S 25° W of S 30° W of S 35° W of S 40° W of S SOUTHWEST 40° S of W 35° S of W 30° S of W 25° S of W 20° S of W 15° S of W 10° S of W 5° S of W WEST 5° N of W 10° N of W 15° N of W 20° N of W 25° N of W 30° N of W 35° N of W 40° N of W NORTHWEST 40° W of N 35° W of N 30° W of N 25° W of N 20° W of N 15° W of N 10° W of N 5° W of N
panel tilt	°	surface slope	°
MORNING   AFTERNOON     4:00 5:00 6:00 7:00 8:00 9:00 10:00 11:00 12:00 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00   Jan                                   Jan Feb                                   Feb Mar                                   Mar Apr                                   Apr May                                   May Jun                                   Jun Jul                                   Jul Aug                                   Aug Sep                                   Sep Oct                                   Oct Nov                                   Nov Dec                                   Dec   4:00 5:00 6:00 7:00 8:00 9:00 10:00 11:00 12:00 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00     MORNING   AFTERNOON

Mailing List

The author maintains a private mailing list of users of the SunAngle suite of solar design tools, and is happy to send you very occasional notices about software upgrades and other items of interest. Such notices do not typically occur more frequently than a few times a year.

Join Mailing List