ProgramsUp to date · Jan 15, 2026
WAP (Weatherization Assistance Program)
A federal program that provides free energy efficiency improvements to low-income homes, including insulation, air sealing, and heating system upgrades.
Why It Matters
Weatherizing a home before installing solar reduces the system size needed, lowering costs. WAP improvements can cut energy bills 20-30%.
Related Tools
Related Terms
LIHEAP (Low Income Home Energy Assistance Program)
A federally funded program that helps low-income households pay energy bills and weatherize homes. Administered by states with varying benefit levels.
Load Profile
A pattern of your electricity usage throughout the day and year. Important for sizing solar and battery systems.