Fox ESS ECS4100 / EP12
Stackable4 – 46 kWh
Modular, stackable: in steps of 4.03 kWh up to 28.21 kWh (ECS4100) or 11.52 kWh up to 46.08 kWh (EP12).
In the first half of 2026, Fox ESS became Europe's largest battery brand. You stack modules: the ECS4100 in steps of 4.03 kWh up to 28.21 kWh, the EP12 in steps of 11.52 kWh up to 46.08 kWh.
ECS4100 / EP12 in detail.
All the manufacturer's data at a glance. During the consultation we choose the right output and set-up together.
Request a quote| Capacity (usable) |
|
|---|---|
| Cell chemistry | LFP |
| Extras | Modular, stackable |
Figures according to manufacturer and distributor documents. Price on request: you get a tailored quote after free, no-obligation advice.
The ECS4100 / EP12 alongside the other home batteries.
| HuaweiLUNA2000 S1 | TeslaPowerwall 3 | SigenergySigenStor | Fox ESSECS4100 / EP12 | BYDBattery-Box Premium HVS / HVM | |
|---|---|---|---|---|---|
| Positioning | Expandable | Built-in inverter | Battery and inverter in one | Stackable | Suits many inverters |
| Capacity | 6.9 / 13.8 / 20.7 kWh (7 / 14 / 21 kWh) | 13.5 kWh | 5 – 48 kWh | ECS4100: 4.03 kWh per module, up to 28.21 kWh · EP12: 11.52 kWh per unit, up to 46.08 kWh | HVS: 5.1 – 12.8 kWh · HVM: 8.3 – 22.1 kWh |
| Power | 3.5 kW per battery module · 10 kW power module | 5 kW continuous | up to 10 kW continuous | On request | On request |
| Cell chemistry | LFP (lithium iron phosphate) | LFP | LFP | LFP | LFP |
| Dimensions | 590 × 255 mm footprint; height 510 / 870 / 1230 mm | 1099 × 609 × 193 mm | On request | On request | On request |
| Warranty | 15 years (Huawei) | 10 years | On request | On request | On request |
Questions about your home battery.
A battery mainly pays off if you have a lot of solar power left over during the day and use a lot in the evening. We look at your consumption and your solar panels and tell you honestly whether a battery makes sense for you.
That depends on how much you use in the evening and at night, and how much surplus your panels produce during the day. A battery that is too big never fills up, one that is too small soon runs empty. We calculate it from your consumption data.
Lithium iron phosphate: a cell chemistry that is more stable and handles more charge cycles than older lithium batteries. Every system in our range uses LFP.
Only if the system has a backup power function and is connected that way. Not every set-up does this as standard. Let us know if you want it and we'll take it into account.
Complete the whole.
Your Fox ESS ECS4100 / EP12, expertly installed.
We visit you with no obligation, look at your home and prepare a tailored quote.
Active in Belgium and the Netherlands