Home solar batteries cost $8,000-$16,000 installed. See pricing for Tesla Powerwall, Enphase, and other popular battery systems.
Adding battery storage to a solar system lets you store excess energy for nighttime use or power outages. Battery prices have dropped 40% since 2020. Here are 2026 costs for popular systems.
Single Battery (10-13 kWh)
Dual Battery System (20-26 kWh)
Tesla Powerwall 3 (13.5 kWh)
Enphase IQ Battery (15 kWh)
A 10 kWh battery covers essential loads for 8-12 hours. Whole-home backup typically needs 20+ kWh.
Lithium iron phosphate (LFP) batteries last longer (10,000+ cycles) than NMC but have lower energy density.
Retrofitting batteries to an existing solar system costs $1,000-$2,000 more than installing both together.
The 30% ITC applies to batteries installed with solar, reducing a $10,000 battery to $7,000 net cost.
Compare prices from top-rated local pros.
Batteries make financial sense in areas with time-of-use rates, no net metering, or frequent outages. In states with strong net metering, the ROI is longer.
Most home batteries are warrantied for 10-15 years and retain 70-80% of original capacity at end of warranty.
Compare prices from top-rated, licensed professionals in your area.