sonnenBatterie 10
An all-in-one home battery with built-in inverter and energy management, available with 5, 10 or 20 kWh of usable LFP storage.
- Best for all-in-one 5 to 20 kWh
- Installed battery
- 5 to 20 kWh
- 10-year warranty
- Made by sonnen.
- Capacity: 5, 10 or 20 kWh usable (5.5, 11 or 22 kWh nominal), in one or two cabinets.
- Power: 3.4 kW inverter on the 5 and 10 kWh versions, 4.6 kW on the 20 kWh version, charging and discharging.
- Complete package: inverter and energy management are built in, and no extra hardware is needed for energy management.
- Backup power in a grid outage is optional and needs sonnenProtect 4000. The data sheet is for Germany, Austria and Switzerland.
Not tested by us
We have not tested the sonnenBatterie 10. The figures on this page come from the sources listed at the end of the page, checked on 11 November 2026, and we do not show prices. "Best for" is based on what the maker says the product is designed for, not on our own tests.
Key figures
5 to 20 kWh
Usable battery capacity
10,000
Cycles
10 years
Warranty
Specifications
Last checked on 11 November 2026. The grey text under each name explains what the value means.
| Specification | Value |
|---|---|
| Storage | |
| CapacityHow much energy the battery stores. Bigger means longer runtime or more of your own solar power used later. | Nominal 5.5 / 11 / 22 kWh; usable 5 / 10 / 20 kWh (models 10/5.5, 10/11 and 10/22) |
| Battery chemistryLFP (lithium iron phosphate) cells are known for long life and stable behaviour with heat. | Lithium iron phosphate (LFP) |
| Cycle lifeHow many full charge and discharge cycles the cells are rated for before they hold less than the stated share of their original capacity. | 10,000 cycles; battery lifetime designed for 20 years (the data sheet adds footnotes we could not read) |
| ExpansionExtra battery units that add storage to the same system. | Modular up to 22 kWh in one system; cascading of 2, 3, 6 or 9 units gives 10 to 180 kWh usable (the 'performance' variants expand to 55 kWh) |
| Power | |
| AC outputThe power it can deliver through its sockets or inverter, in watts. | Inverter nominal power (charging and discharging) 3.4 kW for the 5.5 and 11 kWh versions and 4.6 kW for the 22 kWh version |
| Round-trip efficiencyThe share of the energy you put in that comes back out. The rest is lost as heat. | Not stated as one figure: maximum inverter efficiency 95.4% and maximum battery efficiency 95.9% |
| Backup in a power cutWhether it can keep selected circuits running during a grid outage. | Optional, with sonnenProtect 4000: the battery then switches to backup mode automatically |
| Solar | |
| Solar inverterTurns the DC power from solar panels into AC for the home. Built in means no separate solar inverter is needed. | The 10 version is AC-coupled; sonnen also sells a DC variant, the sonnenBatterie 10 hybrid (not covered here) |
| Connection and housing | |
| Grid connectionThe supply type it is built for. Check it matches your home's supply. | Single phase, 230 V, 50 Hz |
| Dimensions (H × W × D)Check the wall or floor space before you buy, including room for airflow and cables. | Per cabinet 172 to 184 × 69 × 27 cm; the 22 kWh version uses two cabinets. Minimum installation space 187 × 89 × 127 cm (one cabinet) or 187 × 173 × 127 cm (two) |
| WeightMatters for lifting, wall mounting and moving it. | 98 kg (5.5 kWh), 138 kg (11 kWh), 257 kg (22 kWh) |
| Protection ratingIP ratings show protection from dust and water. IP55 and IP65 are rated for outdoor-style exposure; check the installation guidance. | IP30 (indoor use) |
| Operating temperatureThe range it is rated to work in. Cold and heat can reduce performance. | Ambient -5 to 45 °C (the data sheet adds a footnote we could not read) |
| CertificationsSafety and grid standards the maker says the product meets. | VDE-AR-N 4105, CEI 0-21, UN 38.3, IEC 62619, IEC 62109-1, IEC 62040-1, VDE-AR-E 2510-2, VDE-AR-N 2510-50 and EU EMC and low-voltage directives |
| Warranty | |
| WarrantyThe period the maker covers. Read the terms: conditions and capacity guarantees differ. | 10 years |
Compatible with
What sonnen says this product works with. Anything not listed here is not confirmed.
- Other components
- None needed: sonnen calls it a complete system with energy management built in.
- Backup
- sonnenProtect 4000 for backup power during a grid outage.
- Tariffs
- Works with sonnen's dynamic tariff EnergyDynamic, including for homes without solar panels (Germany).
Rules where you live
An installed battery normally needs a qualified electrician, and in many countries you must also tell your grid operator, especially if it can export. This is not a plug-in battery. Rules, incentives and tax treatment differ by country: see our country guides for what applies where you live.
Strengths and things to check
Strengths
- Inverter and energy management built in
- 5, 10 or 20 kWh usable LFP storage
- 10,000 cycles and a 10-year warranty
- Expandable by cascading units up to 180 kWh
Worth checking before you buy
- Heavy: 98 to 257 kg per system
- IP30, so indoor installation only
- Backup power is an optional extra
- Our sources are the German pages: other markets may differ
Change log
We record changes to this page here, so you can see when figures such as the warranty were last updated.
- 11 November 2026
- Page published. Figures are from the German sonnen product page and the sonnenBatterie 10 data sheet (German, file vk03). Warranty at publication: 10 years. sonnen's UK site could not be loaded when we checked, so UK availability is not confirmed.
Where this information comes from
We have not tested this battery. Every figure above comes from sonnen's German product page for the sonnenBatterie 10 and its German data sheet, last checked on 11 November 2026 and translated by us. The page headline says 'Bis zu 22 kW Kapazität', which we read as 22 kWh. A value that these sources do not state is shown as not stated.
We do not show prices, because they depend on the installer's quote.
- Manufacturer sonnenBatterie 10 data sheet (German)
- Manufacturer sonnen sonnenBatterie 10 page (Germany)
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Common questions about sonnenBatterie 10
How much does the sonnenBatterie 10 store?
sonnen offers 5, 10 or 20 kWh of usable capacity (5.5, 11 or 22 kWh nominal). Systems can be expanded to 22 kWh, and cascaded units reach up to 180 kWh usable.
Does it give backup power in an outage?
Only with the optional sonnenProtect 4000. Without it the battery does not supply power during a grid outage.
How long is the warranty?
sonnen states 10 years and a cycle rating of 10,000 cycles. The data sheet footnotes on the conditions were not readable, so check the terms with your installer.
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