Fox ESS · 18.64 kWh · HV stack, 1 master + 3 slaves
Fox ESS EQ4800-L4 18.64kWh HV battery stack
Households that have outgrown a smaller battery are where the EQ4800-L4 fits. It bundles one Fox ESS master and three slave modules into an 18.64kWh high-voltage stack, a natural capacity step when a retrofit brings bigger loads into the design.
Description
Retrofit work punishes vague parts lists, and the L4 answers that with one code for a known configuration: master plus three slaves, 18.64kWh. Quoting against an existing system becomes a clean swap-or-supplement decision rather than a module-by-module count. It also gives surveyors a fixed rung between the L3 below and the L5 above, so upsizing a design mid-project is a one-line change on the order. As with everything here, the ex-VAT trade price applies from the first unit, with UK stock behind it.
Specification
| Brand | Fox ESS |
|---|---|
| Part number | FE-HV-EQ-4-4.8-19.2 |
| Capacity | 18.64 kWh |
| Phase | Single-phase |
| Condition | New |
| Category | Battery modules · Li-ion Battery Pack |
| Delivery method | Pallet freight (UN3480 Class 9 dangerous goods) |
What it pairs with
Pair it at family level with Fox ESS single-phase hybrid inverters such as the H1 Gen 2 or K series models. If the design later needs more capacity, EQ4800 slave modules (FE-HV-EQS-4800) extend the same master. EQ stacking depends on module count and firmware revision, so check Fox's current stacking list for the master you are using.
Single-phase listing with a fixed one-master, three-slave build. Capacity above 18.64kWh means adding EQ slave modules rather than swapping the bundle. 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