SMA Home Storage
A slim, stackable high-voltage battery of 3.28 kWh modules, usable from 3.28 to 19.68 kWh, with IP65 protection and a 10-year warranty when registered.
- Best for slim, stackable setups
- Installed battery
- 3.28 to 19.68 kWh
- IP65
- Made by SMA.
- Energy: 3.28 kWh usable per module (LiFePO₄). A system holds 1 to 6 modules in series, so 3.28 to 19.68 kWh (the product page text says up to 16.4).
- A battery only: it connects to an SMA hybrid inverter (Sunny Boy Smart Energy or Sunny Tripower Smart Energy), with different module counts allowed per inverter model.
- Rated for about 8,000 cycles on the product page, IP65, and mountable on the floor, on the wall or back-to-back.
- SMA gives 10 years of warranty if you register within 30 days; without registration it is 2 years.
Not tested by us
We have not tested the SMA Home Storage. 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
19.68 kWh
Maximum with 6 modules
IP65
Protection rating
10 years
Warranty when registered
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. | 3.28 kWh usable per module (HS-BM-3.28-10, 96 V nominal), measured at 100% depth of discharge and a 4-hour charge or discharge at +25 °C. Systems of 1 to 6 modules give 3.28, 6.56, 9.84, 13.12, 16.40 and 19.68 kWh. |
| Battery chemistryLFP (lithium iron phosphate) cells are known for long life and stable behaviour with heat. | Lithium iron phosphate (LiFePO₄) |
| Depth of dischargeHow much of the battery can be emptied without harming it. 90% means 10% is kept in reserve. | 100% in the capacity figure above; SMA does not state a separate depth-of-discharge setting |
| 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. | About 8,000 cycles according to the product page; the manual does not state a cycle figure |
| ExpansionExtra battery units that add storage to the same system. | 1 to 6 modules per system, connected in series; the product page says it can be scaled from 3.2 kWh to 16.4 (the unit is missing on the page; the manual lists up to 19.68 kWh) |
| Power | |
| Charge and discharge powerHow fast the battery can take in and give out energy. It sets how many devices it can serve at once. | Maximum charge and discharge current 36 A; nominal voltage 96 V per module, so 192 V with 2 modules up to 576 V with 6 |
| Round-trip efficiencyThe share of the energy you put in that comes back out. The rest is lost as heat. | Maximum battery efficiency 94.5%. SMA also cites an SPI of 92.8% for the whole SMA Home Storage Solution in the 2025 HTW Berlin inspection, which includes the inverter. |
| Backup in a power cutWhether it can keep selected circuits running during a grid outage. | SMA says the battery has an integrated black-start function for backup supply when combined with an SMA hybrid inverter |
| Efficiency and standby useLosses when charging, discharging and doing nothing. | Self-consumption of 2 W per module |
| Solar | |
| Solar inverterTurns the DC power from solar panels into AC for the home. Built in means no separate solar inverter is needed. | None: this is the battery only. It works with SMA hybrid inverters |
| Connection and housing | |
| Grid connectionThe supply type it is built for. Check it matches your home's supply. | Not applicable: the battery connects to an SMA hybrid inverter by DC (MC4) and a data cable (RJ45, SMA battery interface) |
| Operating voltageThe range of solar panel voltage the unit can use. Panels outside this range will not charge it properly. | 90 to 108 V with 1 module, 180 to 216 V with 2, 270 to 324 V with 3, 360 to 432 V with 4, 450 to 540 V with 5 and 540 to 648 V with 6 |
| Dimensions (W × H × D)Width, height and depth of the unit, so you can check that it fits. | 610 × 483 × 214.6 mm per battery module; the height of 1, 2 or 3 modules mounted together is 483, 969 and 1,455 mm, plus 106 mm for the base |
| WeightMatters for lifting, wall mounting and moving it. | 38 kg per battery module |
| Protection ratingIP ratings show protection from dust and water. IP55 and IP65 are rated for outdoor-style exposure; check the installation guidance. | IP65, protection class I; outdoor installation possible; installation height up to 3,000 m above sea level; humidity 5 to 95% without condensation |
| Operating temperatureThe range it is rated to work in. Cold and heat can reduce performance. | Charging 0 to 50 °C; discharging -10 to +50 °C; cooled passively through the enclosure with an interior fan |
| ConnectivityHow you monitor and control it, usually through an app. | RJ45 communication terminal with the SMA battery interface protocol |
| CertificationsSafety and grid standards the maker says the product meets. | CE, UN 38.3, IEC 62619, IEC 62477 and VDE 2510-50 |
| Warranty | |
| WarrantyThe period the maker covers. Read the terms: conditions and capacity guarantees differ. | 10 years when you register the device within 30 days (2 years without registration), plus a 12-year performance warranty while the operating temperature is observed |
Compatible with
What SMA says this product works with. Anything not listed here is not confirmed.
- Inverters
- SMA says the battery works with SMA hybrid inverters: Sunny Boy Smart Energy (firmware 3.08.03.R or later) and Sunny Tripower Smart Energy (firmware 3.04.16.R or later). The manual lists STPx.0-3SE-40, SBSExx-50, STPHxx-60 and STPHxx-70 types, each with different allowed module counts.
- Expansion
- 1 to 6 modules, in series, in one system.
- Mounting
- Floor, wall or back-to-back mounting.
- Smart Connected service
- Available in AT, BE, CH, DE, NL and IT according to the manual.
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
- Slim, stackable modules from 3.28 kWh to 19.68 kWh
- IP65 and outdoor installation possible
- 10-year warranty when registered, 12-year performance warranty
- Integrated black-start function with an SMA hybrid inverter
- Floor, wall or back-to-back mounting
Worth checking before you buy
- A battery only: you need a compatible SMA hybrid inverter
- The 10-year warranty needs registration within 30 days; otherwise 2 years
- The product page and the manual disagree on the maximum capacity
- Cycle life is only given as about 8,000 on the product page
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 SMA's Home Storage product page and the SMA Home Storage manual (technical data). Warranty at publication: 10 years if registered within 30 days, otherwise 2 years. The product page text says 16.4 kWh as the maximum; the manual lists 19.68 kWh and we show the manual.
Where this information comes from
We have not tested this battery. Every figure above comes from SMA's Home Storage product page and the SMA Home Storage manual (general data, DC connection, efficiency, climatic conditions and equipment pages), last checked on 11 November 2026. The dimensions and weight are for one module. A value these sources do not state is shown as not stated.
We do not show prices, because they depend on the installer's quote.
- Manufacturer SMA: Home Storage manual, DC connection
- Manufacturer SMA: Home Storage manual, general data
- Manufacturer SMA: Home Storage product page
- Manufacturer SMA: Home Storage manual, efficiency
- Manufacturer SMA: Home Storage manual, equipment
- Manufacturer SMA: Home Storage manual, climatic conditions
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Common questions about SMA Home Storage
How much does the SMA Home Storage store?
SMA lists 3.28 kWh usable per module and systems of 1 to 6 modules, so 3.28 to 19.68 kWh. The product page text mentions 16.4, so check the manual for your order.
Which inverters does it work with?
SMA says it works with its hybrid inverters, the Sunny Boy Smart Energy and the Sunny Tripower Smart Energy, with module counts that depend on the inverter type.
What does the warranty cover?
SMA gives 10 years if you register the device within 30 days and 2 years without registration, plus a 12-year performance warranty under the stated operating temperature. The SMA limited factory warranty conditions apply.
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