Calculateur de Batterie Solaire — États-Unis

The U.S. electricity market is famously fragmented — rates range from under $0.10/kWh in Idaho to over $0.30/kWh in California and the Northeast. This means solar + battery payback varies dramatically by location, but the fundamentals have never been stronger nationwide. The Inflation Reduction Act (IRA) locked in the federal Investment Tax Credit (ITC) at 30% through 2032, making solar more affordable than ever.

Solar irradiance averages 4.5 kWh/m²/day nationally, but the Southwest (Arizona, Nevada, New Mexico) regularly exceeds 6.0, while the Pacific Northwest sees 3.5-4.0. Battery storage is increasingly critical as net metering policies shift — California's NEM 3.0 slashed export rates by ~75%, making self-consumption with batteries far more attractive than sending power to the grid.

Key advantage: The 30% federal ITC is available to all homeowners with tax liability. Combined with state-level incentives (like California's SGIP battery rebate, New York's NY-Sun, or Massachusetts' SMART program), the effective cost of a solar + battery system can be reduced by 40-50%. With ERCOT's grid reliability concerns in Texas and frequent PG&E public safety power shutoffs in California, battery backup provides both financial and resilience value.