Best home battery storage for whole-home backup (2026)

Quick picks

Category	Model	Why it wins	MSRP
Best overall	BYD Battery-Box Premium HVM 8.3	8.28 kWh usable with 9.2 kW continuous output — the strongest power-to-capacity balance here.	$6,300
Best value	Pylontech US5000	4.32 kWh usable for $1,500, with a better power rating than the cheaper rack modules.	$1,500
Best for modular scaling	BYD Battery-Box Premium HVS 10.2	10.24 kWh usable in one stack, 10-year warranty, and enough stored energy for longer outages.	$7,200

If you want the short version: buy the HVM 8.3 if power output matters most, the US5000 if budget matters most, and the HVS 10.2 if you want more runtime per stack. We explain the tradeoffs below, and our affiliate disclosure covers how links on SolarWorld work.

How we picked

We ranked these batteries on usable kWh, continuous kW output, price per usable kWh, chemistry, warranty, and whether the numbers actually fit whole-home backup use instead of just light critical-load coverage. You can see our scoring methodology and the deeper testing criteria at /how-we-test.

What “good” looks like at this price

For whole-home backup, “good” starts around two thresholds: enough usable energy to cover several hours of real household consumption, and enough continuous power to run multiple circuits without constant load juggling. In this lineup, the strongest whole-home candidates sit around 7.68 to 10.24 kWh usable and 7.68 to 9.2 kW continuous output. That is why the BYD stacks dominate the top of this list. By contrast, the cheaper Pylontech rack batteries are excellent value per kWh, but 1.8 to 3.0 kW continuous output is usually too low for a seamless whole-home feel unless you are backing up a very selective subpanel.

Price also splits the field cleanly. The Pylontech US5000 lands at about $347 per usable kWh ($1,500 / 4.32 kWh), while the BYD HVM 8.3 is about $761 per usable kWh ($6,300 / 8.28 kWh). You are paying more for higher output and a more whole-home-ready profile, not just for extra storage. If you have not run your load numbers yet, use our tools to size your system and estimate daily demand with our solar load calculator.

A few baseline facts help frame the market. All seven batteries here use LiFePO4, all carry a 10-year warranty, and all are rated for 6,000 cycles by the manufacturer. For tax planning, the IRS says residential battery storage with a capacity of 3 kWh or greater may qualify for the Residential Clean Energy Credit under current rules; see the latest IRS guidance on the Residential Clean Energy Credit. For battery performance and degradation context, NREL remains a useful reference point on storage system behavior and lifetime considerations in residential applications: NREL energy storage analysis.

Which battery here is actually best for whole-home backup?

The BYD Battery-Box Premium HVM 8.3 is the best fit for whole-home backup in this dataset because it combines 8.28 kWh usable with 9.2 kW continuous output. That 9.2 kW figure is the highest here, and it matters. A battery can have decent stored energy, but if its inverter-side power delivery is too low, you still cannot run larger household loads together.

The runner-up is the BYD Battery-Box Premium HVS 10.2. It gives you more runtime at 10.24 kWh usable, but its continuous output is capped at 7.68 kW, the same as the smaller HVS variants. If your outages are long and your peak simultaneous loads are moderate, the HVS 10.2 may be the smarter buy.

The cheaper Pylontech units make sense for partial-home backup, shed loads, or modular budget builds. For most U.S. homes, a single 1.8 kW battery module is not enough to feel like whole-home backup.

What size battery do you need for whole-home backup?

A rough rule: if your house averages 1 to 2 kW over many hours, then an 8 to 10 kWh battery can cover only part of a day unless solar is recharging it. If you want overnight resilience with some HVAC, refrigeration, lighting, electronics, and pump loads, one small module is rarely enough. That is why the 3.2 to 4.32 kWh usable Pylontech units are budget-friendly but limited as stand-alone whole-home solutions.

Power matters just as much as capacity. A battery with 10 kWh but only 1.8 kW continuous output will struggle to run common overlapping loads. A battery with 8 kWh and 9.2 kW continuous output can support much heavier instantaneous demand, but runtime drops fast if those loads stay on. Use our size your system tool, compare against your utility bills, and browse the full database if you want more than the seven picks here.

The 7 best models

BYD Battery-Box Premium HVM 8.3

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Spec	Value
Usable capacity	8.28 kWh
Continuous output	9.2 kW
Chemistry	LiFePO4
Cycle life	6,000
Warranty	10 years
MSRP	$6,300

The BYD Battery-Box Premium HVM 8.3 is the best all-around whole-home backup pick in this dataset because it has the highest continuous output here at 9.2 kW. That is enough headroom for a much more normal-feeling backup experience than the 1.8 to 3.0 kW budget units.

Its main tradeoff is price per kWh. You are not buying the cheapest storage; you are buying the strongest power delivery in the group. For homes with larger startup loads, that is the right place to spend.

Pros

Pros
Highest continuous output in this lineup at 9.2 kW
8.28 kWh usable is enough for meaningful outage coverage
LiFePO4, 6,000 cycles, and 10-year warranty

Cons

Cons
$6,300 is a steep entry price
Price per usable kWh is much higher than Pylontech US5000
Image not yet available and official product URL not specified by the manufacturer

BYD Battery-Box Premium HVS 10.2

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Spec	Value
Usable capacity	10.24 kWh
Continuous output	7.68 kW
Chemistry	LiFePO4
Cycle life	6,000
Warranty	10 years
MSRP	$7,200

The BYD Battery-Box Premium HVS 10.2 is the best pick here if runtime matters more than peak output. At 10.24 kWh usable, it stores the most energy of any model in this list.

Its limit is that output does not scale with capacity inside this HVS subset. You get the same 7.68 kW continuous rating as the smaller HVS 5.1 and 7.7, so the upgrade buys longer runtime, not more simultaneous load support.

Pros

Pros
Largest usable capacity in this list at 10.24 kWh
7.68 kW is still strong enough for many backup panels
10-year warranty and LiFePO4 chemistry

Cons

Cons
More expensive than HVM 8.3 while offering less output
7.68 kW output stays flat across the HVS range
Image not yet available and official product URL not specified by the manufacturer

BYD Battery-Box Premium HVS 7.7

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Spec	Value
Usable capacity	7.68 kWh
Continuous output	7.68 kW
Chemistry	LiFePO4
Cycle life	6,000
Warranty	10 years
MSRP	$5,800

The BYD Battery-Box Premium HVS 7.7 hits a nice middle ground. It has enough output to feel like a serious backup battery and enough energy to cover a solid block of outage time for disciplined households.

Against the HVM 8.3, you save $500 but give up 0.6 kWh usable and 1.52 kW of output. That makes it a sensible second-tier pick, not the top recommendation.

Pros

Pros
Balanced 7.68 kWh usable and 7.68 kW output
Lower price than the larger BYD options
6,000 cycles and 10-year warranty

Cons

Cons
Less output than the HVM 8.3
Only modest price savings versus stronger BYD options
Image not yet available and official product URL not specified by the manufacturer

BYD Battery-Box Premium HVS 5.1

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Spec	Value
Usable capacity	5.12 kWh
Continuous output	7.68 kW
Chemistry	LiFePO4
Cycle life	6,000
Warranty	10 years
MSRP	$4,200

The BYD Battery-Box Premium HVS 5.1 is unusual in a good way: 7.68 kW of continuous output from just 5.12 kWh usable. That means it can support heavier loads than its capacity suggests, but not for long.

For outage coverage, this is more of a high-power short-duration battery than a full-day resilience tool. If your priority is keeping a lot of circuits available for shorter events, it makes sense. If your priority is overnight runtime, step up to the HVS 7.7 or 10.2.

Pros

Pros
Very strong 7.68 kW output for a 5.12 kWh battery
Lower upfront price than larger BYD stacks
LiFePO4 with 6,000 cycles and 10-year warranty

Cons

Cons
5.12 kWh usable is limited for true whole-home runtime
Costs much more per usable kWh than budget Pylontech options
Image not yet available and official product URL not specified by the manufacturer

Pylontech US5000

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Spec	Value
Usable capacity	4.32 kWh
Continuous output	3.0 kW
Chemistry	LiFePO4
Cycle life	6,000
Warranty	10 years
MSRP	$1,500

The Pylontech US5000 is the clear value pick. It gives you 4.32 kWh usable and 3.0 kW continuous output for $1,500, which is hard to beat on simple dollars-per-kWh math.

The catch is obvious: 3.0 kW is still not whole-home power for many houses. This is best for budget-conscious buyers building a modular system, backing up essentials, or pairing multiple units in a larger design.

Pros

Pros
Best value in this list at $1,500 MSRP
Better output than the 1.8 kW rack options
LiFePO4, 6,000 cycles, 10-year warranty

Cons

Cons
3.0 kW output is limited for whole-home backup
4.32 kWh usable is not enough for long outages alone
Image not yet available and official product URL not specified by the manufacturer

Pylontech Force H1

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Spec	Value
Usable capacity	3.2 kWh
Continuous output	5.5 kW
Chemistry	LiFePO4
Cycle life	6,000
Warranty	10 years
MSRP	$1,900

The Pylontech Force H1 is the niche pick for buyers who need more power than the cheap rack modules provide but cannot stretch to BYD pricing. Its 5.5 kW continuous output is strong relative to its small 3.2 kWh usable capacity.

That same ratio is also the drawback. This battery can support heavier loads, but it will empty quickly under them. Think of it as a high-power bridge battery, not a long-duration whole-home workhorse.

Pros

Pros
5.5 kW output is strong for a sub-$2,000 battery
Useful niche option between cheap rack modules and premium BYD stacks
LiFePO4 with 6,000 cycles and 10-year warranty

Cons

Cons
Only 3.2 kWh usable, so runtime is short
Higher price than US5000 with less stored energy
Image not yet available and official product URL not specified by the manufacturer

Pylontech US3000C

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Spec	Value
Usable capacity	3.2 kWh
Continuous output	1.8 kW
Chemistry	LiFePO4
Cycle life	6,000
Warranty	10 years
MSRP	$1,100

The Pylontech US3000C is the cheapest battery here and still uses the same core chemistry, warranty length, and rated cycle life as the rest. That makes it attractive on paper.

For whole-home backup, the 1.8 kW continuous output is the sticking point. It is fine for a small essential-load setup, networking gear, lights, refrigeration, and careful load management. It is not the battery we would buy for a normal whole-home backup expectation.

Pros

Pros
Lowest entry price in this lineup at $1,100
LiFePO4 chemistry with 6,000 cycles
10-year warranty matches more expensive options

Cons

Cons
1.8 kW continuous output is too low for most whole-home use
3.2 kWh usable means short runtime
Image not yet available and official product URL not specified by the manufacturer

What you give up at this price

The first thing you give up is simplicity. None of the product data provided here includes inverter pairing, surge output, enclosure rating, operating temperature, installation format details, or official product URLs. Those are not small omissions. For a real whole-home backup install, inverter compatibility and surge handling can matter as much as battery capacity. If a field is missing in our data, we will say so plainly rather than guess.

The second compromise is that the cheapest batteries here are only “whole-home” in a loose marketing sense. A 3.2 kWh to 4.32 kWh battery with 1.8 to 3.0 kW continuous output can absolutely be useful, but most households will need either multiple units or aggressive load shedding. If you want one battery that feels closer to seamless backup, the BYD options are the stronger fit, especially the HVM 8.3 and HVS 10.2.

The last tradeoff is cost per capability. Budget models give you attractive dollars per kWh, but not the power ceiling to run a house naturally. Premium models give you better output, but you pay sharply more per usable kWh. That is why we recommend checking your real load profile before you buy, using size your system, comparing options in the full database, and reading our broader battery coverage in the home batteries category.