Solar planning, made clear
Understand solar before you commit
Practical explanations of the numbers, the equipment and the questions worth asking.
Buying solar
Understand solar installation costs
Compare cash price, loan terms, exclusions and lifetime costs.
Read the guideUtility tariffsHow net metering changes savings
Separate electricity you use at home from electricity you export.
Read the guideBackup planningChoose a battery that fits your needs
Estimate energy capacity and check continuous and startup power.
Read the guidePlug-in solarCompare balcony solar kit sizes
Look at usable output, mounting, safety and total ownership cost.
Read the guideTax rulesResidential solar tax credit in 2026
Understand the §25D expiration and avoid misleading installer claims.
Read the guideBefore you buyYour plug-in solar readiness checklist
Check local rules, product instructions and your electrical installation.
Read the guideBehind the numbers
Our calculation methodology
Inspect the formulas, defaults, exclusions and data provenance.
Read the guidePlug-in systemsState rules and verification
Find primary bill records and the questions to check locally.
Read the guideTransparencyHow we publish and correct
Read our approach to sources, assumptions and corrections.
Read the guide