Fox ESS · on the approved battery list
Fox ESS, and how fast a catalogue turns over.
A broad range where current and superseded products share a brand name — and the difference decides eligibility.
Quick answer
Fox ESS holds 11 approved product lines on the Clean Energy Council approved battery list published by the Clean Energy Regulator, across 116 registered configurations from 4.67 to 97.44 kWh usable capacity. 38 of those configurations have already lapsed and can no longer earn certificates. A battery only earns the federal certificates if the exact model is on that list on the day it is installed, so the model number on a quote matters more than the brand on it. Thunderman Electrical and Air Conditioning Services does the licensed electrical side of battery installation across Greater Melbourne under REC 28523 — which brands can be supplied depends on wholesaler arrangements, so ask. Free quote, call 0434 254 474.
What this brand actually does
Stock outlives listings, and the listing is what counts.
Fox ESS has a broad register presence across many product lines, and it is also the clearest example on these pages of how quickly a catalogue turns over. A substantial share of its listed configurations carry approval dates that have already lapsed, with newer lines listed alongside them — and two of its older lines are now entirely lapsed. None of that is a judgement on the hardware, which continues to be widely installed. It is a warning about how a battery is bought: stock of a superseded model can still be sitting in a warehouse and can still be quoted, and it is the listing status on the day of installation that decides whether certificates can be claimed.
Who it suits
And where it's the wrong pick.
It suits a price-conscious buyer working with an installer who checks the register rather than the catalogue, across a range that covers small household systems through to large ones. It is a poorer fit for someone buying on a brochure alone, because the same brand name spans current and superseded products and the brochure will not tell you which is which.
On the register
Fox ESS lines on the register.
Every Fox ESS product line on the approved list, with the usable capacities it is registered across and the date each listing expires. 38 configurations here have already lapsed, including 2 lines that no longer has a current listing at all.
| Brand | Product line | Usable capacity | Sizes | Listing expires | Status |
|---|---|---|---|---|---|
| Fox ESS | 1K5-BAT-4660 | 9.32–41.93 kWh | 8 | 2027-12-31 | Listed |
| Fox ESS | AIO-AC1 | 4.68–9.36 kWh | 6 | 2025-12-21 | Lapsed |
| Fox ESS | AIO-H1 | 4.68–9.36 kWh | 6 | 2025-12-21 | Lapsed |
| Fox ESS | CQ6 | 11.98–83.86 kWh | 13 | 2027-12-31 | Listed |
| Fox ESS | CQ7 | 13.92–97.44 kWh | 52 | 2026-06-30 | Lapsed |
| Fox ESS | ECS2900 | 5.18–18.14 kWh | 6 | not published | Not published |
| Fox ESS | ECS4800 | 8.39–29.35 kWh | 6 | not published | Not published |
| Fox ESS | EP | 4.67–10.36 kWh | 2 | not published | Not published |
| Fox ESS | EP12 Plus (w) | 11.52 kWh | 1 | 2027-12-31 | Listed |
| Fox ESS | EQ4800 | 9.32–41.93 kWh | 8 | 2027-11-14 | Listed |
| Fox ESS | EQ5500 series | 10.92–49.14 kWh | 8 | 2027-12-31 | Listed |
A product line is one family, andsizes is how many separate configurations of it are registered — modular systems are registered once per stack size, which is why some lines show dozens. Usable capacity is the figure the certificate tiers are calculated on, and it is always lower than the nominal capacity printed on the box.Listing expires is the date the Clean Energy Council approval lapses; after it, that configuration can no longer earn certificates. All of it is as published in the Clean Energy Council approved battery list, so you can look up any line yourself.
Which sizes it covers
Certificate bands this range reaches.
Figures from the Clean Energy Council approved battery list, published by the Clean Energy Regulator, as published on 2026-08-20. Check any line yourself atthe register. Read what makes a battery eligible at all onthe eligibility page.
Fox ESS batteries — common questions
What happens if the battery I ordered loses its approval before it is installed?
Certificates are determined by the installation date, not the date the contract was signed — so a listing that lapses between order and install takes the eligibility with it. That is a real risk on long lead times and it is the buyer who wears it unless the contract says otherwise. Two protections are worth asking for: the model number and its current expiry date written into the quote, and a clause covering what happens if the product is superseded before installation. Any installer who checks the register regularly will not find either request unusual.
Which sizes does Fox ESS come in?
Fox ESS holds 11 product lines on the Clean Energy Council approved battery list, registered across 116 separate configurations, running from 4.67 to 97.44 kWh of usable capacity. That covers up to 14 kwh, 14 to 28 kwh, 28 to 50 kwh. Modular ranges are registered once per stack size, so a high configuration count means flexibility rather than a large catalogue of different products.
Are all Fox ESS batteries still approved?
No. 38 of the 116 registered Fox ESS configurations have already lapsed, and 2 product lines have lapsed entirely. A lapsed listing cannot earn certificates from the date it lapsed, whatever stock remains in the warehouse. Take the model number from your quote — not the series name — and check it against the register before you sign.
Does Thunderman install Fox ESS batteries?
Thunderman does the licensed electrical side of a battery installation across Greater Melbourne — the switchboard work, the isolation and protection, the backup circuits and the grid connection — under REC 28523. Which brands Yiannis can supply depends on wholesaler arrangements, so ask rather than assuming from this page: it is a guide to what is on the government register, not a stock list. If you already have a quote for a Fox ESS system from someone else, he is happy to look at the electrical scope in it.
Whichever badge is on it, the switchboard still has to carry it.
Yiannis quotes the electrical side of a battery install — isolation, protection, backup circuits, grid connection — on any brand you've been quoted. Free quote, REC 28523.