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Under the 120% rule, solar + utility power must not exceed 120% of the amperage rating on the main service panel's busbar.
The 120% Rule: Derating Your Breaker to Make Room For Solar
Tech/

Under the 120% rule, solar + utility power must not exceed 120% of the amperage rating on your main service panel's busbar. Learn how to derate your breaker to make room for solar.

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Calculate your solar payback period &
How to Calculate Solar Payback Period & Return on Investment
Solar 101/
Solar panels last at least 25 years, the standard panel warranty in the solar industry.
How Long Do Solar Panels Last? An Overview of Solar Panel Lifespan
Solar 101, Solar Panels/
Comparison of monocrystalline vs. polycrystalline solar panels
Monocrystalline vs Polycrystalline Solar Panels: A Quick Overview
Solar Panels/
Comparing ground mount vs. roof mount solar
Ground Mount vs. Roof Mount Solar Panels: Which is Best?
Solar 101//
How to Size an Off-Grid Solar System
How to Size an Off-Grid Solar System
Off-Grid Solar/
Solar Battery Rebates for California PG&E Customers
Solar Battery Rebates for California PG&E Customers
Battery & Storage//
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