Best Home Battery Systems

Home battery systems are wall-mounted packs wired into your electrical panel that take over instantly when the grid fails — no cords, no starting anything, often so seamlessly you only notice from the app. Paired with solar they can carry a home indefinitely; without it they're sized in the 10-40kWh range for hours-to-days of essential loads. Installed cost is the hurdle, offset in some states by incentives and time-of-use savings.

Outage Geek tracks 13 home battery systems from 12 brands, priced $3,300 to $26,770. The least expensive is the EG4 PowerPro WallMount All Weather at $3,300, and the list below runs cheapest first.

~$3,300

Home Battery System · Battery (LiFePO4)

EG4 PowerPro WallMount All Weather

The DIY community's darling and the reigning value champion of home storage: 14.3kWh of UL9540-listed, heated, IP65 outdoor-rated LiFePO4 for around $3,300 hardware - roughly $230/kWh, a fifth of installed-brand pricing. Price shown is hardware MSRP for the battery alone; you supply the inverter (usually EG4's 18kPV or FlexBOSS21) and either DIY or hire an electrician. Owners commonly build with two or three units (it parallels to 85.8kWh), and owner reports on the hardware are positive. The specs back them up: 8,000-cycle rating, self-heating below freezing, and 200A continuous discharge. The downsides: support is email/forum-grade compared to a dealer network, closed-loop comms with non-EG4 inverters take firmware fiddling, permitting and insurance for self-installs varies by jurisdiction, and 308.6 lbs makes hanging it a genuine engineering project.

10,240 W / 11,520 W surge · up to well pump or a small central AC

capacity: 14,340 Wh
expands to: 85,800 Wh
Transfer switch: transfer-switch ready

Best for DIY and installer-assisted builds chasing maximum storage per dollar with legitimate UL certification.

Full spec sheet

~$5,772

Home Battery System · Battery (LiFePO4)

Enphase IQ Battery 10C

Installers now quote Enphase's fourth-generation battery ahead of the older IQ Battery 5P. Each 10C holds 10 kWh of LFP and carries its own neutral-forming microinverters, so a single unit can island a house without a separate hybrid inverter, and it can be stacked to 80 kWh. Continuous output is 7.08 kW with a 14.16 kW peak, which is a real step up from the 5P but still well short of a Powerwall 3 on the amps a central air conditioner draws at start. It is AC-coupled, which makes it the easy retrofit onto an existing solar array of any brand, though owners say it only feels seamless inside an all-Enphase system. The unit is heavy at 317 lb installed. Enphase publishes no retail price; $5,772 is a distributor's hardware price, and installed quotes with a controller and labor run roughly $13,000.

7,080 W / 14,160 W surge · up to furnace blower, sump pump or a window AC

capacity: 10,000 Wh
expands to: 80,000 Wh
Transfer switch: transfer-switch ready

Best for Homes with Enphase microinverter solar, or an AC-coupled retrofit, that want modular capacity and a long warranty rather than the highest single-unit output.

Full spec sheet

~$6,500

Home Battery System · Battery (LiFePO4)

Enphase IQ Battery 5P

The modular, reliability-first choice - especially for homes already running Enphase microinverters. Each 5kWh module contains six grid-forming microinverters producing 3.84kW continuous (7.68kW peak for motor starts), and you stack modules to fit the budget. Price shown is typical installed cost per module ($5,000-8,000 depending on region and whether a System Controller is included). The 15-year/6,000-cycle warranty is the longest in the industry by five years, and it's the spec owners cite most when justifying the premium. The recurring criticism: per-kWh cost runs $1,000-1,600 installed - roughly double a Powerwall 3 - and whole-home backup realistically needs three-plus modules and the IQ System Controller before it starts a heat pump. Owner sentiment on the no-single-point-of-failure architecture is very positive; sentiment on the final invoice less so.

3,840 W / 7,680 W surge · up to fridge, freezer and the essentials

capacity: 5,000 Wh
expands to: 40,000 Wh
Transfer switch: transfer-switch ready

Best for Enphase-solar homes that want matched, modular storage with the longest warranty available.

Full spec sheet

sonnenSCORE-P10

~$9,500

Home Battery System · Battery (LiFePO4) · 25 dB

sonnenCore+ 10 kWh

A floor-standing cabinet that combines a 4.8 kVA inverter and 10 kWh of LFP in one indoor unit, with a 20 kWh variant (SCORE-P20) and stacking to 60 kWh across three systems. The spec sheet gives a noise emission under 25 dB, so it can sit in a garage or utility room without being heard, which is its best selling point against fan-cooled rivals. Backup power is the soft spot: 4.8 kVA continuous, with a 5-second surge of 8,640 W (36 A at 240 V), so a central air conditioner needs a second cabinet or a load-managed panel. Round-trip efficiency peaks at about 85%, below most rivals. Installers are scarce, and sonnen publishes no price; $9,500 is the sonnenCore's hardware launch price, and installed jobs commonly land between $12,000 and $18,000.

4,800 W / 8,640 W surge · up to furnace blower, sump pump or a window AC

capacity: 10,000 Wh
expands to: 60,000 Wh
Transfer switch: transfer-switch ready

Best for Homes that want a silent indoor battery on a modest essentials panel, or buyers in sonnen's virtual power plant programs.

Full spec sheet

BluettiEP900

~$10,298

Home Battery System · Battery (LiFePO4) · 50 dB

Bluetti EP900 + 2x B500

Bluetti's whole-home system is a 9 kW hybrid inverter that takes two to four B500 packs of 4.96 kWh each, so the entry configuration is about 9.9 kWh and the ceiling is 19.8 kWh per inverter. The thing to read carefully is that 9 kW applies on-grid; the datasheet says maximum off-grid output is 7.6 kW, which is the number that matters in an outage. It is split-phase, IP65-rated for outdoor mounting, and switches in under 10 ms. The inverter weighs 105.8 lb and each B500 weighs about 128 lb, so a two-pack stack is a lot to get onto a wall or pad. Compared with Tesla and Enphase the brand has a thin installer network, so many buyers end up with an electrician unfamiliar with the gear; the 10-year warranty is on par with Duracell. The price is an authorized dealer's list for the two-battery package with the Home Integration Kit; the B500 alone lists at $3,999 on Bluetti's site.

7,600 W · up to well pump or a small central AC

capacity: 9,920 Wh
expands to: 19,840 Wh
Transfer switch: transfer-switch ready

Best for DIY-minded owners with a good electrician who want a modular whole-home LFP system and a lower entry cost than the big three.

Full spec sheet

Lion EnergySanctuary 3

~$10,298

Home Battery System · Battery (LiFePO4)

Lion Energy Sanctuary 3 (1 inverter, 1 battery)

A Utah company's answer to Powerwall pricing: a 12 kW split-phase inverter that takes up to 18 kW of solar and a floor-standing 14.3 kWh LFP battery, sold as a package with wiring and distribution boxes. The spec sheet shows one inverter running up to six batteries, 85.8 kWh in all, and two inverters for 24 kW, so it grows past what most households need. Sanctuary has far less track record than Tesla or Enphase, and owners lean on the Texas-based support line. The warranty requires the system to stay online so Lion can monitor it, which some buyers dislike. Lion publishes no surge rating. The battery alone weighs 290 lb. Lion sells by quote through certified installers; $10,298 is a distributor's price for one inverter and one battery, and the battery alone runs about $4,329.

12,000 W · up to well pump or a small central AC

capacity: 14,300 Wh
expands to: 85,800 Wh
Transfer switch: transfer-switch ready

Best for Cost-conscious owners with a good installer who want a large inverter and lots of capacity growth without Powerwall pricing.

Full spec sheet

~$12,000

Home Battery System · Battery (NMC)

SolarEdge Home Battery

The default add-on for the millions of homes already running SolarEdge inverters. Its DC-coupled architecture is the technical selling point: solar charges the battery without a DC-AC-DC round trip, giving 94.5%+ efficiency - the best path from panel to stored kWh of anything here. 9.7kWh usable, 5kW continuous (7.5kW/10s peak), stacking three-high to 29.1kWh on one Home Hub inverter. Price shown is a typical installed cost; projects commonly land $7,000-15,000 depending on region and wiring. The caveats: it's NMC chemistry in an increasingly LFP world, 5kW continuous won't start big HVAC without careful load design, and it only works within the SolarEdge ecosystem. Owners also report mixed experiences with SolarEdge support, and the company has been through post-2023 corporate turbulence. For existing SolarEdge homes though, nothing else integrates as cleanly.

5,000 W / 7,500 W surge · up to furnace blower, sump pump or a window AC

capacity: 9,700 Wh
expands to: 29,100 Wh
Transfer switch: transfer-switch ready

Best for Existing SolarEdge solar homes that want maximum round-trip efficiency without replacing their inverter.

Full spec sheet

~$13,000

Home Battery System · Battery (LiFePO4)

Anker SOLIX X1

Anker's professionally-installed system, built from slim 5kWh modules into the best-looking cabinet in the business. Price shown is a typical installed 15kWh configuration (~$9,750-11,000 hardware plus $1,500-5,000 installation). The 6kW/12kW-peak power module handles essential-loads or whole-home duty, modules run at full power from -4°F thanks to per-pack thermal management, and systems parallel to a monstrous 180kWh. Reviewers praise the modular economics - add 5kWh at a time instead of a whole second cabinet. The catch: installer coverage is uneven, with one central California buyer quoted quickly while another nearby could not get an Anker installer to call back, and 12kWh usable from the '15kWh' stack (90.2% round-trip) needs reading of the fine print.

6,000 W / 12,000 W surge · up to furnace blower, sump pump or a window AC

capacity: 15,000 Wh
expands to: 180,000 Wh
Transfer switch: transfer-switch ready

Best for Design-conscious homeowners in covered markets who want granular 5kWh-at-a-time expansion.

Full spec sheet

~$15,000

Home Battery System · Battery (LiFePO4)

Tesla Powerwall 3

The reference point every other home battery is measured against. Price shown is typical installed cost ($13,000-16,500 in 2026, roughly $9,300-11,500 hardware). One unit delivers 11.5kW continuous with a 185A locked-rotor start rating - enough to run and start central air - plus an integrated 6-MPPT solar inverter that eliminates a separate inverter purchase. LFP chemistry, 97.5% efficiency, 10-year warranty. In the quotes owners share, it usually comes in cheaper than a comparable Enphase or FranklinWH system. The complaints are real though: some owners describe long support delays, though one early owner says support improved through 2025, and quote quality varies enormously by installer. Expansion packs (13.5kWh, no inverter) bring a unit to 54kWh.

11,500 W · up to well pump or a small central AC

capacity: 13,500 Wh
expands to: 54,000 Wh
Transfer switch: transfer-switch ready

Best for Whole-home backup with solar where maximum power and lowest installed $/kWh win.

Full spec sheet

~$16,000

Home Battery System · Battery (LiFePO4)

FranklinWH aPower 2

The Powerwall alternative that installers experienced with FranklinWH speak highly of. One cabinet holds 15kWh - the most storage per unit of any mainstream battery - with 10kW continuous and a 15kW/10-second surge rated to start a 5-ton air conditioner. Price shown is typical installed cost with the aGate controller ($12,000-20,000 depending on market). Because it's AC-coupled, it retrofits onto any existing solar inverter brand - the single biggest reason people pick it over Powerwall 3. The aGate handles whole-home transfer plus generator and even EV-as-load integration. The main owner gripe is that quotes vary widely between dealers. Expansion runs to a ridiculous 225kWh across 15 units.

10,000 W / 15,000 W surge · up to well pump or a small central AC

capacity: 15,000 Wh
expands to: 225,000 Wh
Transfer switch: transfer-switch ready

Best for Whole-home backup retrofits on existing solar where single-cabinet capacity and surge matter.

Full spec sheet

~$18,000

Home Battery System · Battery (LiFePO4)

EcoFlow OCEAN Pro

EcoFlow's 2026 leap from portable stations into permanently-installed storage, and on paper it's a monster: 10kWh IP67 modules stacking to 80kWh per inverter, a hybrid inverter platform rated to 24kW output with 205A LRA motor-start, 40kW of solar input, an integrated Smart Electrical Panel 40 and 11.5kW EV charger, plus a 15-year warranty that beats everyone except Enphase's on paper. Pricing is quote-only through certified installers - the price shown is an estimated installed starting system (inverter + battery + smart panel) based on early published system ranges; treat it as directional, not gospel. One early owner reports the AI-driven time-of-use optimization working well; the cautions are a brand-new installer network, unproven long-term support for installed products from a portable-power company, and unknown service logistics.

24,000 W · up to whole home with central air

capacity: 10,000 Wh
expands to: 80,000 Wh
Transfer switch: transfer-switch ready

Best for Early adopters wanting one vendor for battery, smart panel, EV charging, and solar at whole-home scale.

Full spec sheet

~$24,000

Home Battery System · Battery

Generac PWRcell 2

The generator company's modular battery play: a cabinet holding three to six 3kWh modules (9-18kWh), so you can start small and slot in ~$2,500 modules later - a genuinely different upgrade path from fixed-capacity rivals. Price shown is estimated installed cost for a full 18kWh cabinet; a 9kWh starter system runs $17,000-21,000 installed, which is expensive per kWh next to a Powerwall 3. Where it earns its keep is ecosystem: PWRmanager load management sheds circuits automatically, it integrates cleanly with Generac standby generators for indefinite outages, and every system ships with an Ecobee smart thermostat. The baggage: failures of the SnapRS rapid-shutdown devices in first-generation PWRcell systems left Generac's battery line with a reliability reputation to rebuild, and dealer-only pricing makes apples-to-apples quotes difficult.

10,500 W · up to well pump or a small central AC

capacity: 18,000 Wh
expands to: 36,000 Wh
Transfer switch: transfer-switch ready

Best for Generac-generator households that want battery + generator orchestration from one dealer.

Full spec sheet

Duracell Power Center Max Hybrid 15kW/40kWh

~$26,770

Home Battery System · Battery (LiFePO4)

Duracell Power Center Max Hybrid 15kW/40kWh

The Max Hybrid is the value play among whole-home batteries: a 15 kW split-phase hybrid inverter with three MPPT inputs, a generator input, 200A backup, and 5 kWh LFP modules that stack to 80 kWh per inverter. The 15-40 configuration is one of several; the same inverter is sold with banks from 15 kWh up to 80 kWh. Installers like the price per kWh, which undercuts the Powerwall and Enphase by a wide margin, and 15 kW continuous means an air conditioner and an oven can run together. The catch owners and installers raise is the paperwork around it: the product pages list no certifications, so confirm UL 9540 status and local utility interconnection approval before you sign. The 10-year warranty guarantees 70% capacity, shorter than Enphase. The $26,770 is a distributor's price for the 15 kW/40 kWh package. Published peak-output figures range from 24 kW to 30 kW.

15,000 W / 24,000 W surge · up to well pump or a small central AC

capacity: 40,000 Wh
expands to: 80,000 Wh
Transfer switch: transfer-switch ready

Best for Big homes with electric heat or cooking that want whole-home backup and growth room at a lower price per kWh than Tesla or Enphase.

Full spec sheet