Buying GuideHow to Size a Solar Battery for Your Home
A step-by-step framework for matching battery capacity to your real-world energy usage and backup goals.
8 min read
New: 2025 home battery buyer's reportStore the sun.
Store the sun.
Power your home on your terms.
Compare premium solar batteries, size your system with our free calculator, and switch to clean, reliable energy, backed by independent guides, not sales pitches.
4.9/5 from 3,200+ homeowners
10-year warranty on storage
94% charged
~36 hrs backup remaining
38,000+
Homes powered
120+
Products compared
$1,940
Avg. annual savings
4.9★
Customer rating
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The smartest way to go solar-powered
We blend premium products, transparent advice, and real testing so you can switch to stored energy with total confidence.
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Every product is tested and ranked on performance, never pay-to-play placement.
10-year warranties
We only list storage backed by long, transferable warranties and proven chemistry.
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Cut grid reliance and carbon by storing the solar you already generate.
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Connect with vetted local installers and get fixed-price quotes upfront.
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Plain-English guides that explain trade-offs so you buy once, correctly.
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Battery capacity calculator
Estimate the right battery size for your home, see projected savings, and get product recommendations. No signup required.
24 kWh
1 days
6 kWh
Estimates only. Assumes 90% usable depth of discharge and a $0.18/kWh blended rate. For illustration, not a quote.
Recommended capacity
26.5 kWh
25%
Solar offset
$394
Est. savings/yr
876 kg
CO₂ cut/yr
Loved by homeowners
Real switchers, real savings
The capacity calculator nailed our sizing. Two outages this summer and we never noticed. The lights just stayed on.
Marcus Reed
Austin, TX
I compared six batteries in one afternoon. The guides are genuinely independent and saved us thousands.
Priya Nair
San Diego, CA
Installation was painless and our power bill dropped by 80%. Energy4Solar made the whole thing feel effortless.
Tom & Elena Vasquez
Denver, CO
Premium feel, honest advice, and great prices. This is how buying energy storage should work.
Dana Whitfield
Portland, OR
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