Batteries
Plug-in batteries that pay for themselves.
Every unit charges from the grid, not just from solar — that's what makes the economics work. No rewiring, no landlord sign-off. Savings shown are paired with E.ON Next Smart Saver on average household use, as a guide.
EcoFlow STREAM AC Pro£799
Built for tariff arbitrage. Charges itself when power is cheap.
Grid-charge1.9 kWh (→11.5)3-pin plug-in
Buy at Amazon UK
£176/yr · 4.5 yr paybackDetails
Anker SOLIX Solarbank 3£949
The rugged all-rounder. IP67, expandable, strong UK support.
Grid-charge2.7 kWh (→16.2)3-pin plug-in
Buy at Amazon UK / Anker
£247/yr · 3.8 yr paybackDetails
Marstek Venus E 3.0£849
The value pick. Most kWh for your money.
Grid-charge5.1 kWh (→15.4)3-pin plug-in
Buy at Marstek direct
£295/yr · 2.9 yr paybackDetails
Zendure SolarFlow Hyper 2000£649
The tech pick. Bidirectional AC, learns your usage.
Grid-charge1.9 kWh (→7.7)3-pin plug-in
Buy at Kingdom Solar (UK)
£174/yr · 3.7 yr paybackDetails