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28 to 50 kWh · certificate factor 15%

Past this point the battery is rarely the hard part of the job.

Above 28 kWh of usable capacity the certificate factor falls away sharply, and the questions that decide the project stop being about the product — they are about the connection, the supply and the space. 88 approved product lines from 49 brands offer a size in this range.

Quick answer

Home batteries between 28 and 50 kWh of usable capacity attract the federal certificate factor at 15%. 88 product lines from 49 brands hold an approved configuration in this range, covering 1444 registered sizes from 28.3 to 50 kWh usable. The steep drop in the factor at this size is the government signalling that this is no longer the mainstream household case, and most systems here sit behind a business, a farm or a property with several vehicles. Thunderman Electrical and Air Conditioning Services handles the electrical side of battery installation across Greater Melbourne — switchboard work, isolation, backup circuits and grid connection under REC 28523. Free quote, call 0434 254 474.

What this size does to the house

Network approval, three phases and fire separation.

At this scale the installation has more in common with a small commercial job than a domestic one. The certificate factor drops sharply here, which is the government signalling that this band is no longer the mainstream household case — and in practice most systems this size sit behind a business, a farm shed, a large property with a big daytime load, or a home with several cars charging. The constraints stop being about the battery and start being about everything around it: the distributor's approval and any export limit applied to the address, three-phase supply in most cases, fire separation and siting under AS/NZS 5139, and enough switchboard to isolate and protect it properly. Lead times on network approval matter here in a way they never do on a small residential install.

Who it suits

And who it doesn't.

It suits a site with a genuinely large and predictable daytime or evening load — a workshop, a hospitality fitout, a property running pumps or refrigeration, a household with several vehicles. It does not suit an ordinary suburban home hoping for independence from the grid: the capacity is rarely the binding constraint there, the connection agreement and the inverter capacity are, and a system this size can be approved down to something smaller than the brochure implies. If a retailer quotes this band for a normal house without having asked about the supply, that is worth a second opinion.

Approved ranges in this band

Ranges registered this large.

Far fewer lines reach this far, and the ones that do are usually the top of a modular range rather than a distinct product. Capped at 2 lines per brand so one modular range cannot fill the table — 68 lines shown, 20 more in the register. 13 of the 1444 registered sizes in this band have already lapsed and 8 lapse within six months, which is why the expiry column is there.

BrandProduct lineUsable capacitySizesListing expiresStatus
AforeAF-HT Series31.33–41.77 kWh22027-12-31Listed
Alpha ESSSMILE31.2–46.8 kWh32027-12-31Listed
Alpha ESSSMILE B528.73 kWh12027-10-12Listed
AmbrionAS330–50 kWh142027-12-31Listed
AmbrionHS330–50 kWh62027-12-31Listed
ANKERAnker SOLIX X130 kWh22027-12-31Listed
BLUETTIB500033.17–46.44 kWh32027-12-31Listed
BSLBATTMatchBox HVS31.94–37.27 kWh22027-12-31Listed
BYDBATTERY-BOX HVB29.69 kWh12027-12-31Listed
ChelioniHome30–40 kWh32027-05-21Listed
DeyeAI-W30.72 kWh12027-12-31Listed
DeyeBOS-G-Pro30.72–46.08 kWh42027-12-31Listed
DMEGCH0230.72–46.08 kWh42027-12-31Listed
DynessCygni29.18–43.77 kWh62027-12-31Listed
DynessSTACK10029.18–48.64 kWh52027-12-31Listed
ESYSUNHOME10KWH+H30.85–41.14 kWh22027-12-31Listed
ESYSUNHOMEESYSUNHOME29.18 kWh12026-12-19Lapses soon
EVOLVEEVOLVE40.44 kWh12026-01-13Lapsed
Felicity ESSLUX-X29.88–39.84 kWh32027-12-31Listed
Felicity ESSLUX-Y29.18–48.64 kWh52027-12-31Listed
Fox ESS1K5-BAT-466032.61–41.93 kWh32027-12-31Listed
Fox ESSCQ629.95–47.92 kWh42027-12-31Listed
GoodWeLynx F G228.8 kWh12027-12-31Listed
GrowattALP30–50 kWh52027-12-31Listed
GrowattALP LV30–50 kWh52027-12-31Listed
HGNESSHG-C&I-HV30.72–46.08 kWh42027-12-31Listed
HiconicsHEC230–40 kWh22027-12-31Listed
HiconicsMD-BS30 kWh12027-12-31Listed
HINENNA32.26–46.08 kWh82027-12-31Listed
HINENRechargeable Li-ion Battery Pack41.04 kWh22027-12-31Listed
HYXiPOWERHigh Voltage Battery31.8–42.4 kWh22027-12-31Listed
JEESENGJEEDD28.56–33.33 kWh22027-12-31Listed
Kehua TechNA30–40 kWh32027-05-21Listed
KSTARBlueSpark30.1–40.14 kWh32027-12-31Listed
LIBLIB BSS01L1632.15–48.23 kWh22027-12-31Listed
NAHUINA29.18–38.91 kWh32027-12-31Listed
NEOVOLTBW-BAT28.8–48 kWh3not publishedNot published
NEOVOLTBW-BAT-9.6P36.4–45.5 kWh2not publishedNot published
OLiPowerLPBES30.72–46.08 kWh32027-12-31Listed
PotisEdgeALOE28.8 kWh22027-12-31Listed
PotisEdgeNora-C0630.72–49.15 kWh42027-12-31Listed
PylontechFH3X30.72–35.84 kWh82027-12-31Listed
PylontechForce H329.8–35.84 kWh42027-12-31Listed
PytesPi LV130.72 kWh12027-12-31Listed
Redback TechnologiesRED-P133.25 kWh12027-12-31Listed
RENONXtreme LV28.8 kWh12026-08-17Lapsed
RisenRisen Stack148 kWh12027-12-31Listed
ROYPOWRBmax5.5MH series30.53 kWh12027-12-31Listed
SAJB2S32–44.8 kWh42027-12-31Listed
SelectronicSelectCell39.78 kWh12027-12-31Listed
SigenergySigen Energy Storage System28.3–50 kWh11772027-12-31Listed
SigenergySigenStack Energy Storage System46.8 kWh22027-12-31Listed
SkyVoltSkyVolt S28.74–33.54 kWh22027-12-31Listed
SolaXT-BAT-SYS-HV-S3.629.7–43.1 kWh52026-10-23Lapses soon
SolaXTSYS-HS5130.7–46 kWh42027-12-31Listed
SolplanetAP-H30.72–46.08 kWh42027-12-31Listed
SUMRAYSR-LV10G36.99–46.24 kWh22027-12-31Listed
SUMRAYSR-LV14G41.76 kWh12027-12-31Listed
SungrowSBH30–40 kWh3not publishedNot published
SungrowST050-250CF49.9 kWh12027-12-31Listed
SUNSYNKHigh Voltage32.25–46.08 kWh4not publishedNot published
SwattenSieB-HP-F30.72–46.08 kWh42027-12-31Listed
TeslaPowerwall 3 AC with Backup Gateway 240.5 kWh12027-12-31Listed
TeslaPowerwall 3 and Expansions with Backup Gateway 240.5 kWh32027-12-31Listed
WECO5K0 PRO30–45 kWh42027-12-31Listed
ZRGPPower Base LV-Mate_10029.8–39.73 kWh3not publishedNot published
ZYC EnergySIMPO HV28.8 kWh12027-12-31Listed
ZYC EnergySIMPO HV Pro32.2–48.3 kWh32027-12-31Listed

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.

Wrong size?

Look either side.

Capacities and expiry dates from the Clean Energy Council approved battery list, published by the Clean Energy Regulator, as published on 2026-08-20. Look any line up yourself atthe register.

28 to 50 kWh home batteries — common questions

Is there any point going above 50 kWh?

There can be, but not for the certificates. Certificates can only be claimed on the first 50 kWh of usable capacity, so anything beyond that has to justify itself on its own merits — a genuine load, a resilience requirement, an off-grid or edge-of-grid site. Batteries larger than 50 kWh are registered and installed in Australia and there is nothing wrong with them; they are simply outside what the household program was designed to support. If someone is proposing one, the question to ask is what specific load or outage requirement it is answering, and whether the connection at that address will actually permit it.

How many batteries are approved in the 28 to 50 kWh range?

88 product lines from 49 brands offer at least one approved configuration between 28 and 50 kWh, which works out to 1444 separate registered sizes. 1 of those lines cover this range only — they are built for it rather than reaching into it from above or below. Those are configurations on the Clean Energy Council approved battery list rather than products on a shelf, so a retailer's catalogue will look different in both directions.

What does the certificate factor of 15% mean for this size?

It is the weighting applied to this slice of usable capacity when small-scale technology certificates are calculated — not a price, and not a figure Thunderman sets. The Clean Energy Regulator applies the full factor to the first band of usable capacity and steps it down for the bands above, so a larger battery does not attract proportionally more support. Certificates are also determined by the date the system is installed rather than the date the contract is signed, and nothing can be claimed beyond the first 50 kWh of usable capacity. What that comes to in money depends on the certificate market on the day and on your installer's arrangements, which is why the figure belongs in a written quote rather than on a web page.

Is nominal capacity or usable capacity the one that counts?

Both, for different things, and quotes mix them up constantly. Nominal capacity decides whether a battery is eligible at all — it has to fall between 5 and 100 kWh. Usable capacity is what the tiers are calculated on and what you actually get to use, and it is always the smaller number. In this range the approved configurations run from 28.3 to 50 kWh usable. If a quote gives you one figure and not the other, ask for both before comparing it against anything.

The battery is the easy half. The switchboard decides the job.

Yiannis will look at what the board can actually carry, which circuits are worth keeping alive in an outage, and what the distributor will approve at your address — then quote the whole job. Free quote, REC 28523.

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