Solar · Costs, budgets and timelines · Updated November 2026
Solar Battery Installation Cost and What the Quote Includes
A complete home battery system averages about $10,000, according to HomeAdvisor, with storage typically priced at $400–$750 per kilowatt-hour. Size, the type of inverter and whether you are adding to an existing solar system drive the cost.
Costs at a glance
| Item | Typical cost |
|---|---|
| Complete battery system (average) | About $10,000 |
| Storage price | $400–$750 per kWh |
| 5 kWh battery | About $2,000–$3,800 |
| 14 kWh battery | About $5,600–$10,500 |
| Installation labor | Typically $2,000–$3,500 |
| Adding a battery to an existing solar system | Can add $1,000–$3,000 |
From HomeAdvisor's solar battery storage cost guide.
What a complete quote should list
- Battery brand, model and usable capacity (kWh), and power output (kW).
- Which circuits will be backed up, and whether a critical-loads subpanel is included.
- Inverter or gateway equipment, and whether it works with your existing solar.
- Electrical work: panel upgrades, wiring, disconnects.
- Permits, inspections and utility interconnection paperwork.
- Warranty: years, cycle count or energy throughput, and the capacity guaranteed at the end.
- Monitoring app and any subscription.
Sizing questions to ask
- Which appliances do I want to run during an outage, and for how long?
- Can the battery start large motor loads like central AC or a well pump?
- How will the battery recharge during a multi-day outage?
- Will the battery be used daily for time-of-use savings, and how does that affect its warranty?
Federal tax credits for homeowner-owned residential systems (Section 25D) ended for installations completed after December 31, 2025, according to the IRS. Check your state and utility for current battery incentives.
Comparing outage options? See solar batteries vs. a standby generator.
Sources
- HomeAdvisor: Solar battery storage cost, accessed November 2026
- IRS: FAQs on the modification of sections 25C and 25D under the One Big Beautiful Bill Act, accessed November 2026
Cost figures are national ranges from the sources listed above and in our solar cost guide, not a quote from FixFinch or any contractor.