Solar panels are great, but they only generate power when the sun is shining. A solar battery system lets you:
- Store extra energy for nighttime or outages,
- Potentially shift your usage away from peak pricing, and
- Increase your home’s resilience when the grid goes down.
This guide walks through the top solar battery options in 2026 and helps you decide if one actually makes sense for your home.
Quick Comparison: Best Solar Batteries 2026
| Battery System | Usable Capacity | Power Output | Warranty | Installed Cost (Est.) |
|---|---|---|---|---|
| Tesla Powerwall 3 | 13.5 kWh | 11.5 kW continuous | 10 years / 70% capacity | $12,000–$16,000 |
| Enphase IQ Battery 5P | 5 kWh (stackable) | 3.84 kW per unit | 15 years / 70% capacity | $8,000–$14,000 (2 units) |
| FranklinWH aPower 2 | 13.6 kWh | 10 kW continuous | 12 years / 70% capacity | $13,000–$17,000 |
Installed costs are estimates and vary significantly by region, installer, and system configuration. Request quotes from local installers for accurate pricing.
Our Top Picks — Reviewed
Tesla Powerwall 3
The Powerwall 3 is the most widely installed home solar battery in the U.S., and Tesla’s 2024 redesign made it even better. It now includes an integrated solar inverter, which simplifies installation and reduces the number of components in your system. With 13.5 kWh of usable storage and 11.5 kW of continuous power output, it can handle most whole-home loads during an outage.
✓ Why We Like It
- Integrated inverter simplifies installation
- Strong 11.5 kW continuous output
- Excellent app monitoring and grid management
- Wide installer network across the U.S.
- Competitive pricing vs. previous generation
✗ Worth Knowing
- Must be purchased through Tesla-certified installers
- Integrated inverter means you can’t mix with non-Tesla solar easily
- 10-year warranty (shorter than some competitors)
Best for: New solar installations, homeowners who want a proven, widely-supported system with strong backup capability.
Estimated installed cost: $12,000–$16,000 (before incentives)
Learn More at Tesla →Enphase IQ Battery 5P
Enphase takes a different approach: instead of one large battery, the IQ Battery 5P is a modular 5 kWh unit that you can stack. Most homeowners install 2–3 units for 10–15 kWh of total storage. This flexibility is a real advantage if you want to start small and expand later, or if your roof and solar layout makes a single large battery impractical.
✓ Why We Like It
- Modular—add capacity as your needs grow
- Best-in-class 15-year warranty
- Pairs seamlessly with Enphase microinverter systems
- Excellent Enlighten monitoring app
✗ Worth Knowing
- Lower per-unit power output than Powerwall
- Best value when paired with Enphase solar
- Can get expensive if you need large capacity
Best for: Homeowners with existing Enphase solar systems, or those who want to start with a smaller battery and expand over time.
Estimated installed cost: $8,000–$14,000 for a 2-unit (10 kWh) system
Learn More at Enphase →FranklinWH aPower 2
FranklinWH is a newer name in the home battery market, but the aPower 2 has earned strong reviews for its whole-home backup capability. At 13.6 kWh and 10 kW continuous output, it’s designed to keep your entire home running during extended outages—not just essential circuits. It also uses lithium iron phosphate (LFP) chemistry, which is safer and typically more durable than older lithium-ion chemistries.
✓ Why We Like It
- LFP chemistry for safety and longevity
- Whole-home backup capability
- 12-year warranty
- Works with most solar inverter brands
✗ Worth Knowing
- Smaller installer network than Tesla
- Newer brand with less long-term track record
Best for: Homeowners in areas with frequent outages who want to keep the whole house running, not just essential circuits.
Estimated installed cost: $13,000–$17,000 (before incentives)
Learn More at FranklinWH →Do You Actually Need a Battery?
Short answer: It depends on why you’re going solar in the first place.
A battery makes the most sense if:
- You have frequent power outages. If your area loses power regularly—from storms, grid instability, or other causes—a battery gives you backup power without a generator.
- Your utility has time-of-use (TOU) pricing. If electricity costs more during peak hours (typically 4–9 PM), a battery lets you store cheap solar energy and avoid buying expensive peak-hour power.
- Net metering rates in your area are poor. In states where utilities pay very little for excess solar energy fed back to the grid, storing that energy yourself makes more financial sense.
A battery is less critical if:
- Your utility offers full retail net metering (you get credited at the same rate you pay).
- Power outages in your area are rare and brief.
- Your main goal is simply reducing your monthly bill—solar alone will do that.
The honest answer is that most homeowners who add a battery do it for peace of mind and backup power, not purely for financial return. The financial case is strongest in states with poor net metering or high peak pricing. Talk to a local solar installer to run the numbers for your specific utility and usage.
Tax Credits and Incentives for Solar Batteries
Solar battery systems installed alongside solar panels may qualify for the federal solar Investment Tax Credit (ITC). Battery-only installations (without solar) may also qualify under certain conditions. Visit IRS.gov or consult a tax professional for current eligibility and rates, as these programs can change.
Many states and utilities also offer additional rebates for battery storage. Your solar installer should be able to walk you through what’s available in your area.
Want to Cut Your Energy Bill Without Guessing?
Download our free Energy Savings Guide—25 proven, homeowner-tested ways to use less energy and stay comfortable.
Get the Free Guide →⚡ Also Consider: Portable Backup Power (Available on Amazon)
Not ready for a full solar battery install? These Amazon-available options provide backup power for essentials during outages:
- Jackery Explorer 2000 Pro — 2,160Wh portable power station, powers fridges and essentials for 24+ hours
- EcoFlow DELTA Pro — 3,600Wh expandable to 25kWh, solar-compatible, whole-home backup capable
- Bluetti AC200P — 2,000Wh, 2,000W AC output, 700W solar input, excellent value
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