Altenergyweb Solar Panel Estimator
Desired Daily Production (KWH)
Panel Size (Watts)
Local Insolation Value KWH/m 2 /Day
Overall System Efficiency (percent)
Number of Panels Needed
To estimate the number of solar panels you need for photovoltaic installation, enter numbers for desired daily electric production, panel size, local insolation value, and system efficiency. The calculator recomputes when you click outside a box.

For guidelines on using this estimator go to   Altenergy Solar Panel Estimator Guidelines

For a primer on solar panels click on   Altenergy Solar Panel Basics