Provides gross income tax deduction for costs of purchasing and installing whole house backup electrical generator or home backup battery system for resident taxpayer's principal residence.

This bill allows New Jersey resident taxpayers to deduct the full cost of purchasing and installing qualifying whole-house backup power systems (either natural gas/propane generators or home battery systems with at least 3 kilowatt-hours capacity) from their gross income. It directly affects homeowners who own a primary residence in New Jersey and install these systems to provide backup electricity during power outages. The deduction covers both the purchase and installation costs, provided the systems meet state and local installation, inspection, and permitting requirements. The bill defines "home backup battery systems" to include common technologies like lithium-ion and lead-acid batteries, and "whole house generators" as permanently connected systems that only activate during outages.