WA SB6008

Establishes a residential battery incentive grant program administered by the Department of Commerce to provide upfront payments for grid-connected home battery systems (minimum 5 kWh capacity)

Sets incentive amounts at up to $13,800 for low-income and moderate-income customers and up to $8,100 for all other customers, with applications accepted from July 1, 2026 through June 30, 2036

Requires at least 40% of program funding be reserved for low-income, moderate-income, or tribal households, and caps single utility awards at 35% of biennial funding with investor-owned utilities limited to 50% total

Mandates electric utilities with more than 100,000 retail customers implement a flexible demand program by December 31, 2026, allowing utilities to dispatch enrolled batteries during peak load events

Exempts grant funds received by utilities from business and occupation (B&O) tax under chapter 82.04 RCW