Solar array sizer

Panel performance at your site conditions using the guide's field model, array output with derating, motor window checks, and the IEC 62253 four-condition report.

Panel datasheet (STC values)

Pmax, watts

Vmpp, volts

Impp, amps

Voc, volts

Isc, amps

NOCT, degrees C

Temperature coefficient of Voc

Coefficient unit

Datasheets ship both units. The unit must be stated; guessing it is the classic sizing error.

Site conditions

Design-month ambient, degrees C

Peak irradiance, W/m²

Site latitude, degrees

Designed tilt, degrees

Array and motor

Panels in series

Parallel strings

Overall derate factor

System uses an inverter

Guide bands: 0.85 to 0.90 without inverter, 0.82 to 0.85 with.

Motor or inverter minimum, VDC

Maximum, VDC

Maximum current draw, A