Battery Storage
Alpha ESS Smile G3 10.1kWh All-in-One IP65
Korean-engineered AIO storage system. 10.1kWh + hybrid inverter, IP65-rated for outdoor install.
£2001.89 ex VAT
How it scores
Scores based on published manufacturer specifications and weighted criteria — not lab testing. Methodology.
Specifications
- Chemistry
- LiFePO4
- Weight kg
- 140
- Usable kWh
- 10.1
- Warranty years
- 10
- Ac or dc coupled
- AC
- Inverter built in
- Yes
- Round trip eff %
- 95
- Depth of discharge %
- 95
What I noticed
Alpha ESS Smile G3 series is a popular alternative to GivEnergy and Tesla in the UK installer market. The 10.1kWh AIO combines battery cells with a hybrid inverter in a single IP65 weatherproof cabinet, similar to the GivEnergy AIO but at a noticeably lower price for slightly less capacity.
The Smile G3 platform includes back-up power output (with the optional back-up box) so the system can provide partial off-grid running during grid outages. Battery management is via the Alpha Cloud app and web portal — Alpha ESS's installer reporting tools are notably mature.
Who it suits
UK homeowners who want AIO simplicity without paying GivEnergy or Tesla pricing. At £2000 ex VAT for 10.1kWh + inverter, this is one of the strongest £/kWh propositions in the AIO category.
What I'd watch for
UK installer familiarity is moderate — established but lower than GivEnergy. Warranty terms vary by installer scheme; confirm before commit. The G3 generation is the current product; verify you're not getting older G2 stock at the same price.
Smile G3 10.1kWh All-in-One IP65 head-to-heads
Side-by-side scoring vs each alternative in our shortlist.
Other Battery Storage on my shortlist
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