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SMA Sunny Boy Storage 2.5
SMA Sunny Boy Storage 2.5

SMA Sunny Boy Storage 2.5

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  • AC-coupled solution allowing storage to be added anywhere in the site, for existing and new PV systems
  • Built-in WiFi
  • Add storage to existing solar systems, without taking liability for the PV system
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SMA Sunny Boy Storage 2.5 is:

  • Simplest solution for adding storage with only 3 components (Inverter, Energy Meter, Battery)
  • Fast, simple, 1-person commissioning using a smartphone
  • Has new warranty with 5 + 5 years
  • Gives you high efficiency transformerless inverter, up to 97% efficient
  • Weigh only 9kg

The Sunny Boy Storage is the battery inverter for high-voltage batteries from important reputable manufacturers. With a charge and discharge power of 2.5 kW, it is ideally suited to handle electricity demand of a private household.

The Sunny Boy Storage is the right solution for people who want to make their home independent from conventional electric utility companies and rising electricity costs by using intermediate storage for their solar energy. This gives you maximum flexibility both now and in the future.

With the Sunny Boy Storage, customers benefit from markedly reduced system and installation costs and flexible applications. Thanks to AC coupling, the battery inverter can be installed or expanded in any location, at any time, regardless of whether or not there is already a PV system installed. The Sunny Boy Storage is a true jack-of-all-trades, one that uses high-voltage technology to make it cost-efficient and light weight. It also uses just a few components, because the most important functions for intelligent battery management are already integrated. This makes the Sunny Boy Storage the ideal choice for putting more sun in your electricity supply.


  • For new and existing systems: reduced installation costs, can be retrofitted and expanded at any time, as needed
  • For almost all PV system types: string inverters, module inverters and power optimizers
  • Can be combined with numerous types of energy: PV, wind energy, combined heat and power plants
  • Choice of lithium-ion battery (currently Tesla Powerwall, additional batteries to follow shortly)


  • Most cost-effective AC-connected battery inverter on the market
  • 97% efficiency allows for optimal use of cached energy
  • Maximum PV yields while meeting all applicable regulations for feed-in limits (e.g., EEG, KfW 275, Zero Export)

Easy to use

  • Quick and straightforward one-person installation, thanks in part to it weighing only 9 kg
  • Simple installation using a smartphone or tablet via WLAN and an intuitive web interface
  • Everything at your fingertips thanks to its direct connection to Sunny Portal / Sunny Places

SMA Sunny Boy Connection

See possible connections with SMA inverters and 3rd party inverters >

Sunny Boy Storage 2.5 Datasheet Warranty  Operating Manual


Additional information

Weight 9.2 kg
Dimensions 45 × 35.7 × 12.2 cm

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