Duracell Dura16 vs Fox ESS ECS Cube
A side-by-side look at the Duracell Dura16 and Fox ESS ECS Cube. Winning figures are highlighted.
| Duracell Duracell Dura16 | Fox ESS Fox ESS ECS Cube | |
|---|---|---|
| Price from | n/a | n/a |
| Usable capacity (base) | 14.4 kWh | 2.59 kWh |
| Power output | 6.6 kW | 3.5 kW |
| Max with expansion | 192 kWh | 15.5 kWh |
| Chemistry | LFP | LFP |
| Backup capable | No | No |
| Warranty | 10 yrs | 10 yrs |
Best value per row highlighted. Prices last checked 15 October 2026.
Duracell Dura16
The Dura16 is a lot of usable storage for the money: 14.4kWh of a 16kWh pack, at 6.6kW, with an 8,000-cycle rating that comfortably outlasts the 10-year warranty on paper. The familiar brand is licensed: it's built and warranty-supported by Puredrive Energy in Gloucestershire, which is worth knowing given how much a battery warranty depends on the company still being there. The catch is tie-in: it's sold only alongside a Duracell inverter, so it suits a new install rather than a retrofit onto an existing hybrid.
Full Duracell Dura16 reviewFox ESS ECS Cube
Modular pricing makes Fox ESS attractive when you want to start small and expand. Pair with a Fox hybrid inverter for the smoothest setup.
Full Fox ESS ECS Cube review