Basics

Learn the main differences between residential and commercial solar, directly from the experts' mouths.
A solar panel spec sheet provides valuable information about the operating parameters of a panel.
A refresher on some of the key terms and metrics for expressing how much sunlight will reach a solar array.
How does a photovoltaic system work? What components is it made of? And what factors affect how much energy it produces? Read on to find out this and more!
What is an energy load profile is, why does it influence financial returns for solar, and how do you model one?
An introduction to kW and kWh. How do we get to these terms, what do they mean, and how are they used in your electric bill?  
Time of use rates charge different prices for electricity at different times. We explain what you should know—including how they affect solar customers.
Solar panel wiring (stringing) can be complex! We provide a primer on key considerations when deciding how to string solar panels.
A primer on the commercial solar sector, its current scale, factors that have constrained its growth, and forecasts for its expansion.
Solar professionals need to be well versed in electricity — that includes mastering the difference between alternating current (AC) and direct current (DC).