sonnen Battery Guide: sonnenCore+, Evo and Home Battery 11

A sonnen battery is an AC-coupled, lithium iron phosphate home storage system that sonnen says will pair with any solar array, backed by a 10-year or 10,000-cycle warranty. sonnen’s US site lists three models in October 2026: the indoor sonnenCore+, the outdoor sonnenEvo, and the newer indoor/outdoor sonnenHome Battery 11, which stacks up to 60 kWh. This guide uses sonnen’s US spec sheets, product pages and factory limited warranty for every figure. We haven’t tested a sonnen battery ourselves.

The Current sonnen Battery Lineup

Model	Install location	Capacity per unit	Max stacked	Warranty
sonnenHome Battery 11	Indoor or outdoor (NEMA Type 3R)	10 kWh (small cabinet) or 10/20 kWh (large cabinet)	Up to 60 kWh	10 yr or 10,000 cycles
sonnenCore+	Indoor (IP30)	10 kWh (SCORE-P10) or 20 kWh (SCORE-P20)	3 units, 60 kWh	10 yr or 10,000 cycles
sonnenEvo	Outdoor (IP56)	10 kWh	3 units, 30 kWh	10 yr or 10,000 cycles

Source: sonnen US residential pages, sonnenCore+ technical specifications, sonnenHome Battery 11 tech specs and sonnen Factory Limited Warranty (Nov 25, 2025).

sonnenHome Battery 11 Specs

Spec	sonnenHome Battery 11
Usable capacity	10 kWh (small cabinet), 10 or 20 kWh (large cabinet)
Nominal power	6,000 W
Backup power	6 kW continuous, 7.2 kW for 30 min, 8.64 kW for 5 s, 12 kW for 450 ms
Max round-trip efficiency	86.02%
Grid integration	AC-coupled
Max supported PV per system	6 kW AC
Operating temperature	−4 °F to 122 °F
Chemistry	Lithium iron phosphate, 5 kWh modules
Enclosure	NEMA Type 3R, indoor or outdoor
Certifications	UL 9540, UL 1741, UL 1973, UL 9540A

Source: sonnenHome Battery 11 engineering design tech specs.

sonnen says the Home Battery 11 supports wall-mounted, wall-supported and floor-mounted installation, and that its sonnenHub has integrated load shedding. It’s designed for sonnen’s virtual power plant program, sonnenVPP.

sonnenCore+ Specs

Spec	1 unit	2 units	3 units
Usable capacity (P10 / P20)	10 / 20 kWh	20 / 40 kWh	30 / 60 kWh
Nominal power (grid-tied at 104 °F)	4.8 kVA	9.6 kVA	14.4 kVA
Off-grid continuous current	0–25 A	0–50 A	0–75 A
On-grid pass-through	35 A	200 A (with AC Connections module)	200 A (with AC Connections module)

Source: sonnenCore+ technical specifications. Units must be all 10 kWh or all 20 kWh.

The sonnenCore+ is AC-coupled, indoor-rated (IP30), uses lithium iron phosphate cells in 5 kWh modules, lists 94.4% peak inverter efficiency and is rated under 25 dB. sonnen recommends up to 6 kVA of PV per system.

sonnenEvo

sonnen describes the sonnenEvo as its first outdoor home battery for the Americas, an integrated AC-coupled system with an IP56 rating. Each unit holds a 10 kWh sonnenModule 4 made of two 5.0 kWh LFP modules, and up to three units stack for 30 kWh. sonnen estimates lifetime throughput of up to 90 MWh per system under its 10-year/10,000-cycle warranty.

Backup, Load Shedding and Solar Recharge

sonnen says the sonnenHub that comes with the Home Battery 11 has integrated load shedding, so it can drop selected loads during an outage instead of relying on a separate exclusive loads panel. sonnen also offers a VPP Smart Breaker solution, built with ADAPT Energy, that sheds hard-to-relocate loads right where they sit in the panel. That matters because a 6 kW battery can’t start everything at once.

Recharging in an outage has limits too. sonnen’s sonnenCore+ spec sheet notes that in off-grid mode the battery can accept at most 4.48 kW of charging for one system, 8.3 kW for a two-unit stack and 11.8 kW for three. A large solar array won’t refill the battery faster than that while the grid is down. The Home Battery 11 spec sheet lists 6 kW as the maximum supported AC power from PV per system.

Warranty in Detail

sonnen’s Factory Limited Warranty (dated November 25, 2025) covers sonnenCore+, sonnenEvo and sonnenHome Battery 11 for the earlier of 10,000 cycles or 120 months after installation by an authorized installer, including the inverter, battery modules, cabinet and components. Key conditions in the document:

The system must be installed and commissioned by a certified sonnen installer.
sonnen requires continuous internet access to the battery.
For the Home Battery 11, the warranty can pass to a new owner of the building if the system stays in its original location.

Compare terms across brands in home battery warranties compared.

What the Specs Mean

Power is modest per unit. One sonnenCore+ supplies 4.8 kVA, and one Home Battery 11 supplies 6 kW continuous. Larger loads need stacking or load shedding.
Very long cycle rating. 10,000 cycles is far more than daily use for 10 years would need (3,650 cycles).
AC coupling. sonnen batteries work alongside any existing solar inverter, which makes them a retrofit option.

How It Compares to Powerwall 3, Enphase 5P and FranklinWH

Spec	sonnenHome Battery 11	sonnenCore+ (P20)	Tesla Powerwall 3	Enphase IQ Battery 5P	FranklinWH aPower 2
Usable energy	10 or 20 kWh	20 kWh	13.5 kWh	5.0 kWh	15 kWh
Continuous power	6 kW	4.8 kVA	Up to 11.5 kW	3.84 kVA	10 kW
Coupling	AC	AC	DC solar input built in	AC	AC
Chemistry	LFP	LFP	LFP	LFP	LFP
Warranty	10 yr or 10,000 cycles	10 yr or 10,000 cycles	10 yr, 70% (US)	15 yr or 6,000 cycles	15 yr or 60 MWh

Figures from each maker’s US documents.

Versus Powerwall 3: sonnen stores more per cabinet but supplies less continuous power per unit. See our Tesla Powerwall 3 review.
Versus Enphase 5P and FranklinWH: all three are AC-coupled retrofit options. FranklinWH leads on power per unit, Enphase on granular sizing, and sonnen on cycle rating.

Who It Suits

Homes with existing solar that want an AC-coupled battery with a high cycle rating.
Owners interested in virtual power plant programs. sonnen’s California sonnenConnect program pays enrolled owners who meet its requirements.
Homes with indoor space (Core+) or a need for outdoor mounting (Evo, Home Battery 11).

Who Should Look Elsewhere

Homes that want large motor loads started from a single unit.
Owners who can’t keep the battery online, since sonnen’s warranty requires internet access.

Sizing Example

Illustrative inputs: a home with 15 kWh of nightly use and a 5 kW evening peak.

Power: 5 kW is above one sonnenCore+ (4.8 kVA) but within one Home Battery 11 (6 kW).
Energy: 15 kWh ÷ 0.9 (10% reserve) ≈ 16.7 kWh, so a 20 kWh cabinet.
Choice: one 20 kWh sonnenHome Battery 11 meets both, or two 10 kWh sonnenCore+ units (20 kWh, 9.6 kVA) for more power indoors.
Cycles check: one full cycle a day for 10 years is about 3,650 cycles, well under 10,000.

See how many batteries to power a house.

Price and Incentives

sonnen sells through certified installers, and we aren’t publishing a price we can’t verify. There’s no 30% federal credit for homeowner-owned systems installed after December 31, 2025 (IRS). Check state and utility battery programs.

Electrical work can be dangerous: follow the manual, fuse and size every cable correctly, and use a licensed electrician for anything connected to household wiring.

FAQ

What sonnen batteries are sold in the US?

sonnen’s US site lists the sonnenHome Battery 11, sonnenCore+ and sonnenEvo.

What is the sonnen battery warranty?

10 years or 10,000 cycles, whichever comes first, covering the inverter, modules, cabinet and components, with certified installation and internet connection required.

Can a sonnen battery work with my existing solar?

Yes. sonnen batteries are AC-coupled, and sonnen says they work with new or existing solar systems.

How many sonnen batteries can I stack?

Up to three sonnenCore+ or sonnenEvo units per home. sonnen lists up to 60 kWh for the Core+ and Home Battery 11.

Is sonnen LFP?

Yes. sonnen uses lithium iron phosphate cells in all its home batteries.

Sources: sonnen, US residential pages, sonnenCore+ technical specifications, sonnenHome Battery 11 engineering design tech specs, sonnenEvo page, FAQ and Factory Limited Warranty (sonnenusa.com); Tesla Powerwall 3 Datasheet; Enphase IQ Battery 5P datasheet; FranklinWH aPower 2 datasheet; IRS, Residential Clean Energy Credit. Accessed Oct 2026.