Fox ESS · 4.14 kWh · 1-phase HV battery module (master)
Fox ESS ECS 4.14kWh HV battery (master)
The ECS 4300 master is the 4.14kWh module that starts a Fox ESS high-voltage battery stack. Spec it on new installs: every ECS tower starts with one master, and slave modules grow the stack from there.
Delivery in 3–5 working days (estimate). The dispatch clock starts at cleared payment.
Description
For a new design the master is the first line on the parts list, so this is the SKU that anchors the quote. From there the maths is simple: 4.14kWh per module, stacked up to the figure the customer signed off. Trade buyers rate that predictability, because the same master starts a modest two-module tower or a taller one, and the survey notes barely change between jobs. Stock position and price sit on this page, and the ex-VAT figure you see is the figure that lands on the invoice.
Specification
| Brand | Fox ESS |
|---|---|
| Part number | FE-HV-ECM-4300 |
| Capacity | 4.14 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
Build the tower with the ECS 4.14kWh slave modules listed alongside, then pair the stack with a Fox single-phase hybrid such as the H1 5.0kW Gen 2. Stack limits and inverter matching depend on model and firmware revisions, so confirm the final design against Fox ESS's current pairing and stacking list before ordering the full kit.
Single-phase ecosystem. This is the head unit of a stack: grow capacity with matching ECS slave modules rather than mixing battery series. For anything this page can't settle, ask the trade desk before ordering or consult a competent installer.
Often bought alongside
Last updated 2026-07-19