Fox ESS · 4.03 kWh · 1-phase HV battery master · type B
Fox ESS ECS4100 4.03kWh HV battery (master)
Step up a block size and you arrive at the ECS4100 master: a 4.03kWh HV module in the V2 connector B build for installers whose storage targets outgrow the 2.88kWh class. Quote it when the customer's capacity target sits well above entry level.
Delivery in 3–5 working days (estimate). The dispatch clock starts at cleared payment.
Description
Fewer, larger modules change the economics of a bigger battery bank. Reaching a given capacity with 4.03kWh blocks trims the module count against the 2.9-class alternatives in this range, which shortens install time and simplifies the tower. As the master, this is the controlling unit an ECS4100 stack forms around, with same-series slaves supplying the growth. It carries connector B, so hold that standard through the whole tower and across any future extension the customer asks for.
Specification
| Brand | Fox ESS |
|---|---|
| Part number | FE-HV-ECM-4100 |
| Capacity | 4.03 kWh |
| Phase | Single-phase |
| Condition | New |
| Category | Batteries · Li-ion Battery Pack |
| Delivery method | Pallet freight (UN3480 Class 9 dangerous goods) |
Datasheets & manuals
What it pairs with
The matching expansion part is the ECS4100 4.03kWh slave in connector B (FE-HV-ECS-4100), stocked here for towers that go beyond one module. Communications across Fox HV stacks sit with the Fox HV BMS-V2, and the family-level inverter partner is a Fox hybrid. Revision and firmware set the hard rules, so verify the build against Fox ESS's current stacking list.
V2 build with connector B on a single-phase ecosystem; slaves joining the stack must match both revision and connector. For anything this page can't settle, ask the trade desk before ordering or consult a competent installer.
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Last updated 2026-07-19