Fox ESS · 12.0 kW · 3-phase hybrid/AC inverter
Fox ESS H3 Smart 12kW hybrid/AC inverter
Plenty of three-phase PV was fitted years before storage made sense, and the H3 Smart 12kW is the hybrid/AC inverter for the installer bringing those sites up to date. Run AC-coupled, it adds battery capability around the existing generation; run as a hybrid, it can replace the old inverter outright.
Delivery in 3–5 working days from order (estimate).
Description
Retrofit work rewards hardware that does not force the decision early. Survey an ageing three-phase array and the right answer might be to keep the original inverter and AC-couple, or to strip it out and centralise on one hybrid; this unit covers both routes at the top rating of the Smart range. For the wholesale buyer that translates to one box quoted against several possible outcomes, which is how retrofit margins survive contact with the site.
Specification
| Brand | Fox ESS |
|---|---|
| Part number | FE-H3-12.0-SMART |
| Power rating | 12 kW |
| Phase | Three-phase |
| Condition | New |
| Category | Hybrid inverters · Hybrid Inverter |
| Delivery method | Parcel courier |
What it pairs with
Pair it with the higher-capacity Fox stacks listed alongside, the EQ4800 towers among them, and meter the board with the Fox 3PH CHINT DTSU666 where export limitation applies. A WLAN stick covers monitoring where the site has usable Wi-Fi; the 4G-2 dongle steps in where it does not. Battery-to-firmware pairing changes by revision, so work from Fox ESS's current compatibility list.
Three-phase only. The rating makes it the largest H3 Smart in this catalogue; beyond it the H3 Pro is the next step. For anything this page can't settle, ask the trade desk before ordering or consult a competent installer.
Often bought alongside
Last updated 2026-09-08