Solar batteries have quickly become one of the most important parts of modern home energy systems. As electricity rates rise and utility export credits fall, more homeowners are investing in battery storage to take control of their energy use. But one of the first questions homeowners ask is: how much does a solar battery actually cost in 2025, and what will change in 2026?
The answer depends on the size, type, and brand of battery you choose, as well as where you live and what incentives you qualify for. This guide breaks down everything you need to know about solar battery pricing, installation, and savings across the United States.
What Impacts Solar Battery Cost?
The total cost of a solar battery system includes more than just the battery itself. Several key factors influence the overall price:
- Battery capacity (kWh): Larger batteries store more energy and cost more overall, but often have a lower cost per kilowatt-hour.
- Battery chemistry: Lithium Iron Phosphate (LFP) and Nickel Manganese Cobalt (NMC) are the most common chemistries, each with different price and performance points.
- Efficiency and lifespan: Premium models with higher round-trip efficiency (90%+) and longer warranties (10+ years) command higher prices.
- Installation and integration: Adding a battery to an existing solar system can require new inverters, wiring, or electrical upgrades.
- Brand and warranty: Systems from top-tier brands like Tesla, Enphase, and FranklinWH often cost more but come with robust performance guarantees.
- Incentives and location: State and federal programs can significantly reduce out-of-pocket costs.
Average Solar Battery Costs in 2025
As of early 2025, the average cost to install a home solar battery in the U.S. ranges between $9,000 and $18,000 before incentives. After applying the 30% federal tax credit, most homeowners pay $6,000 to $12,000 for a complete setup.
| Battery Size | Average Installed Cost (Before Incentives) | After 30% Federal Tax Credit | Typical Brand Examples |
|---|---|---|---|
| 5 kWh | $5,000–$7,000 | $3,500–$4,900 | Enphase IQ Battery 5P |
| 10 kWh | $9,000–$13,000 | $6,300–$9,100 | Tesla Powerwall, FranklinWH |
| 13.5 kWh | $12,000–$16,000 | $8,400–$11,200 | LG RESU Prime, SolarEdge Energy Bank |
| 20 kWh | $16,000–$22,000 | $11,200–$15,400 | Generac PWRcell, Panasonic EverVolt |
- Average cost per usable kWh: $700–$1,000 installed
- Typical labor cost: $1,000–$3,000
- Most common total system range: $10,000–$20,000 after incentives
For a deeper dive into specific models and performance, explore our Best Solar Battery for Home guide.
Incentives and Rebates in 2025
Incentives can cut thousands off the cost of a solar battery system. Here are the major programs available in 2025:
| Incentive Type | Description | Estimated Savings |
|---|---|---|
| Federal Investment Tax Credit (ITC) | 30% credit on total system cost (through 2032) | $3,000–$6,000 |
| SGIP (California) | $150–$1,000 per kWh for residential customers | $1,500–$10,000 |
| State/Utility Rebates | Additional programs in HI, MA, NY, and others | $500–$2,500 |
Pro tip: In California, homeowners combining solar panels and batteries can save up to $10,000 with SGIP and federal incentives together.
Solar Battery Cost by Type
The type of battery you choose impacts both the upfront cost and long-term value. Here’s a 2025 comparison by chemistry:
| Battery Type | Average Cost/kWh | Lifespan (Cycles) | Efficiency | Maintenance | Typical Use |
|---|---|---|---|---|---|
| Lead-Acid | $400–$600 | 2,000 | 75% | High | Off-grid or backup |
| Lithium-Ion (NMC) | $700–$900 | 4,000–6,000 | 90–93% | Low | Grid-tied homes |
| Lithium-Iron Phosphate (LFP) | $800–$1,000 | 6,000–10,000 | 93–96% | Low | Modern homes and hot climates |
| Flow / Sodium-Ion | $1,000–$1,300 | 10,000+ | 80–90% | Moderate | Large or future-proof setups |
For a closer comparison of battery types and their advantages, see Which Type of Battery Is Best for a Home Solar System?
Popular Battery Brands and Their Costs
- 13.5 kWh usable capacity
- Cost: $12,500–$15,000 installed
- Efficiency: ~90%
- Warranty: 10 years
- Integrated inverter and seamless backup switch
- 5 kWh per module (stackable)
- Cost: $5,500–$6,500 per unit
- Compact, modular, and ideal for small-to-mid homes
- 13.6 kWh capacity
- Cost: $13,000–$16,000
- Paired with aPowerHub controller for hybrid systems
Generac PWRcell
- Modular system expandable up to 36 kWh
- Cost: $16,000–$20,000
- High surge capacity for whole-home backup
SolarEdge Energy Bank
- 10 kWh capacity
- Cost: $11,000–$14,000
- Pairs seamlessly with SolarEdge inverters
2026 Price Predictions
Experts expect solar battery prices to continue declining through 2026. Based on data from BloombergNEF and Wood Mackenzie, lithium battery pack costs are projected to drop 8–12% year over year, reaching approximately $550–$850 per usable kWh installed by late 2026.
Factors influencing 2026 pricing trends include:
- Expanded domestic battery manufacturing under the Inflation Reduction Act (IRA).
- Increased adoption of lithium-iron-phosphate (LFP) technology due to its safety and cost advantages.
- Supply chain stabilization post-2024, reducing transportation and raw material costs.
- Growth of virtual power plant (VPP) participation, allowing homeowners to monetize stored energy.
By 2026, a typical 10 kWh home battery system could cost $8,000–$11,000 before incentives, putting clean energy storage within reach for more households than ever.
Cost vs. Savings: Is It Worth It?
Solar batteries can significantly reduce electricity costs and increase energy independence. Let’s look at the savings potential:
- Average energy bill reduction: 60–80% for solar + battery homes
- Payback period: 7–12 years depending on TOU rates and incentives
- Lifetime savings: $10,000–$20,000 over 10–15 years
Example:
A 10 kWh battery costing $10,000 (after incentives) saves about $1,200 per year in TOU rate management and backup value, paying for itself in roughly 8 years.
Additional Cost Considerations
- Inverter upgrades: Hybrid or replacement inverters may add $1,000–$3,000.
- Electrical panel upgrades: Homes with older wiring may need $500–$2,000 in updates.
- Permit and inspection fees: Typically $300–$1,000.
- EV charger integration: Adding a Level 2 charger can cost $1,000–$2,000 more but enhances total system value.
Are Solar Batteries Worth It in 2025–2026?
For most homeowners, yes. Under NEM 3.0 and with rising TOU rates, batteries allow you to use more of your solar energy, reduce grid reliance, and protect against outages.
They are especially worthwhile if you:
- Live in a state with frequent blackouts or wildfire shutoffs (California, Texas, Florida)
- Pay high evening utility rates
- Want to future-proof your home for electric vehicles or VPP programs
Conclusion
In 2025, a typical solar battery installation costs $9,000–$18,000 before incentives and $6,000–$12,000 after credits. By 2026, continued cost declines are expected to make home energy storage even more accessible, with prices averaging 8–12% lower than current levels.
If you are considering solar battery storage, NRG Clean Power can design a system that fits your home and budget.
Get a free customized quote today and discover how much you can save with a solar + battery solution.
FAQ
How much does it cost to add a battery to existing solar panels?
Retrofitting usually costs $10,000–$14,000 depending on inverter compatibility.
Can I finance a solar battery?
Yes. Most installers offer loans with 0–2.99% APR, spreading payments over 5–10 years.
What is the cheapest solar battery in 2025?
Lead-acid systems remain the most affordable but have shorter lifespans and lower efficiency.
How long do solar batteries last?
Most lithium batteries last 10–15 years or 6,000+ cycles.
Are solar batteries safe?
Yes. Modern lithium batteries include built-in management systems that prevent overheating and overcharging.