Eco 10 (10 kWh)
The Sonnen Eco is built around LFP chemistry and an unusually long warranty. The right unit when the install is part of a considered architectural plant room, longevity matters more than headline price, and the household intends to live with the system long enough to see the warranty out.
- Round-trip efficiency
- Above 89%
- Running cost
- £-560/yr
- Installed
- £9,500 to £12,500 installed
Editorial render. Not a manufacturer photograph; we do not redistribute press imagery without a licence.
Primary question · When does the Sonnen Eco premium pay back over a Powerwall or GivEnergy?
Long-term owners on architectural projects where the warranty length is the deciding factor.
£9,500 to £12,500 installed
- Long warranty and cycle life
- LFP chemistry from a brand that has used it for a decade
- Architectural floor-standing form
- Premium pricing per usable kWh
- Smaller UK installer pool than GivEnergy
Open the cost planner to estimate your installed price.
Key specifications
- Usable capacity
- 10 kWh
- Continuous power
- 4.6 kW
- Round-trip efficiency
- Above 89%
- Warranty
- 15 years or 15,000 cycles
- , Long warranty and cycle life
- , LFP chemistry from a brand that has used it for a decade
- , Architectural floor-standing form
- , Premium pricing per usable kWh
- , Smaller UK installer pool than GivEnergy
Tesla★★★★★Powerwall 3 (13.5 kWh)- Round-trip efficiency
- Above 90%
- Running cost
- £-780/yr
Solar + battery togetherTime-of-use tariffsApp-first householdsReadHouse Verdict9.4/10
GivEnergy★★★★★All-In-One 13.5 kWh- Round-trip efficiency
- Above 88%
- Running cost
- £-760/yr
Single-cabinet plant roomsBritish installer supportTariff-led householdsReadHouse Verdict9.0/10
If your brief matches "long-term owners on architectural projects where the warranty length is the deciding factor.", the Eco 10 (10 kWh) is a confident pick. If it doesn't, the alternatives above are more honest answers.
Estimate your installed cost
The planner uses your specific home; not a brochure number.