Fox ESS · 1-phase · current sensor CT clamp
Fox ESS CT clamp for AC, HY and AIO ranges
This is the Fox ESS CT clamp, the current sensor that clips around the incoming supply so a Fox inverter can read import and export. One part number covers the AC, HY and AIO ranges. It belongs on the order of any installer commissioning Fox kit and in the van of anyone servicing it.
Delivery in 3–5 working days (estimate). The dispatch clock starts at cleared payment.
Description
A CT clamp is the sort of part that decides whether a commissioning visit finishes or gets rebooked. They get left on the last job, crushed in the toolbox or found faulty at handover, and without one the inverter cannot see import and export. At trade pricing that makes this an obvious van-stock line: keep a couple in the glovebox and the problem disappears. It covers the Fox AC, HY and AIO ranges from a single part number, which keeps ordering simple for firms fitting more than one Fox platform. The price on this page is the ex-VAT trade price, the same at any quantity.
Specification
| Brand | Fox ESS |
|---|---|
| Part number | FE-AIO-CT |
| Phase | Single-phase |
| Condition | New |
| Category | Parts & accessories · Current Sensor Clamps |
| Delivery method | Parcel courier |
What it pairs with
Its natural partners here are the Fox AC charger inverters, such as the AC 3.7kW and AC 5.0kW Gen 2 units, which take their grid reading from a CT like this one. Where a wired run back to the meter is impractical, the Fox ESS wireless transmitter and receiver for the CHINT DDSU666 CT is the alternative. Pairing can vary by inverter revision, so check Fox's current compatibility list before ordering.
Single-phase only, and it is a sensor rather than a power device: it adds measurement, not capacity or output. Compatibility is listed for the Fox AC, HY and AIO ranges, so check Fox's current list for anything outside them. 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