Is Solar Battery Storage Worth It? (Powerwall 3 vs. Enphase 5P)
Residential energy storage prices have dropped while utility peak rates continue to climb. Here is the financial payback math for home solar batteries.
1. The 3 Financial Drivers of Battery Storage Value
Home batteries provide three distinct layers of economic value: Peak Rate Arbitrage, Emergency Blackout Resilience, and 30% Federal ITC Tax Credit qualification.
Net Battery Investment Formula
Net Battery Cost = Gross Installed Price ($11,500) - 30% Tax Credit ($3,450) = $8,050 Net Cost
Calculate Your Home Battery ROI
Input your local peak electricity rates to calculate exact Powerwall and Enphase battery payback horizons.
Launch Battery Payback CalculatorFrequently Asked Questions
How long does a Tesla Powerwall 3 last during a power outage?
A single 13.5 kWh Tesla Powerwall 3 can power essential household loads (refrigerator, lights, Wi-Fi, phone chargers, and TV) for 24 to 36 hours. When paired with rooftop solar panels, it recharges during the day for continuous off-grid backup.