SA commercial battery rebate examples
Four design examples — not named customer case studies. How a Powering Business-style formula hits a seventy-five thousand dollar cap per Australian Business Number, and what “maximise the rebate” actually means under that cap.
September 2026 · design examplesDesign examples, not case studies
These are design examples. They are not named customer case studies. No shop, shed, or depot on this page is a published TOGS job. The sizes are order-of-magnitude sketches so the grant maths is visible.
The last published South Australia Powering Business Grant (Business Growth Fund Round 3) paid three hundred dollars per kilowatt-hour of battery — nominal capacity, including inverter and battery-management gear — and two hundred and fifty dollars per kilowatt of solar installed with that battery. The grant is the lesser of that capacity formula or half of eligible out-of-pocket spend. The hard cap is seventy-five thousand dollars per Australian Business Number (ABN). The site is a network-connected electricity customer. A home office on the house meter is usually out.
Round 3 applications closed on 31 October 2025, or when the twenty million dollar pool ran out. As at 17 September 2026 a later 2026 round was unconfirmed. Treat the rates below as the last published formula. Confirm a live round on the SA Government grant page before anyone treats the dollars as cash on a job.
Federal Small-scale Technology Certificates (STCs) under the Small-scale Renewable Energy Scheme (SRES) sit in a different bucket. For an eligible battery they are a few thousand dollars — about seven thousand at mid-2026 certificate prices — on the first fifty kilowatt-hours of usable storage, tapering after fourteen. They are not New South Wales Peak Demand Reduction Scheme (PDRS) Peak Reduction Certificates. Those NSW certificates are where six-figure lines become real on a multi-megawatt-hour battery. SA is not that scheme.
What “maximise the rebate” means
Two hundred and fifty kilowatt-hours of battery at three hundred dollars each is seventy-five thousand dollars on the capacity formula alone. Four hundred kilowatt-hours is one hundred and twenty thousand on the formula, then the cap cuts it back to seventy-five thousand. Extra battery past the cap is not an infinite rebate. The useful move is often more solar kilowatts plus the right battery kilowatt-hours up to the cap — kit the load will actually cycle.
The grant is also limited to half of eligible spend. A cheap quote that inflates the “rebate” above half the real outlay fails that test.
Cold store / food processing
Load shape, in plain English. Compressors run day and night. The packing floor, lights, and office sit on daylight. Night is the fridge holding temperature. The hungriest half-hour often lands when the plant starts in the morning, or when the dock doors stay open.
Solar vs battery. Solar covers the day shift and refills the pack. The battery earns its keep on the night compressors and on flattening the half-hour that sets a demand charge. This is the load shape where storage is doing real work, not sitting for show.
~80–150 kW solar · 150–250 kWh battery
A two-hundred kilowatt-hour pack at three hundred dollars each is sixty thousand dollars. Add sixty kilowatts of solar at two hundred and fifty dollars each and the formula is seventy-five thousand. The cap is full.
400 kWh does not grow the grant
Four hundred kilowatt-hours of battery alone is one hundred and twenty thousand on the formula. The grant still stops at seventy-five thousand dollars.
Maximise the rebate here: size the pack for the night run and the demand spike, then add solar until the formula meets seventy-five thousand. A giant battery past two hundred and fifty kilowatt-hours does not grow the grant. It only grows the invoice.
Federal STCs: a two-hundred kilowatt-hour pack sits over the one-hundred kilowatt-hour federal battery window, so those certificates are zero on the battery. Solar STCs on an array up to one hundred kilowatts are a separate, smaller line — thousands, not a second grant. Do not fold them into one “rebate” number and call it SA.
Workshop / light industrial
Load shape. Day-heavy. Welders, compressors, lights, and the office from about seven to five. Evening is security, maybe a leftover cool room, maybe a vehicle on charge. The expensive half-hour is often late afternoon when tools overlap.
Solar vs battery. Solar does most of the daily work. The battery covers the late-afternoon peak, the start-up spike, and a short outage so the workshop keeps trading. This is not a night factory.
~100–160 kW solar · 80–120 kWh battery
One hundred kilowatt-hours of battery is thirty thousand dollars on the formula. One hundred and twenty kilowatts of solar is another thirty thousand. Combined: sixty thousand. Room under the cap.
More solar, or a little more storage
Another sixty kilowatts of solar, or another fifty kilowatt-hours of battery, is how this example reaches seventy-five thousand dollars.
Maximise the rebate: more solar kilowatts plus a battery sized to the peak, up to the cap. A four-hundred kilowatt-hour wall on a day-only workshop is grant-cap theatre.
Federal STCs: at one hundred kilowatt-hours nominal this example can still sit inside the federal battery window. That is about seven thousand dollars extra at mid-2026 prices — thousands, not six figures. Stack it beside the SA grant when a round is open and the grant rules allow third-party contributions to be treated that way. Read the agreement. Do not invent a combined headline.
Irrigation / pumping shed
Load shape. Day-heavy pumping while the sun is up. Night is near-idle. A bore, a pivot, a packing-shed washdown on a timer.
Solar vs battery. This is a solar-direct job first. The pump can run when the array is making power. A large battery on a day-only pump is kit that barely cycles. The contrast with the cold store is the point of this example.
Modest battery · large solar
Fifty kilowatt-hours of battery is fifteen thousand dollars. Two hundred and forty kilowatts of solar is sixty thousand. Combined: seventy-five thousand. Almost all of it from solar.
A 250 kWh pack that sleeps
Stuffing a two-hundred-and-fifty kilowatt-hour pack onto a pump that sleeps at night “to maximise the rebate” buys storage the load will not use. The grant then pays for the first slice of a battery that sits.
A pumping shed with no National Metering Identifier (NMI) — no network connection — is outside Powering Business. Off-grid pumping is a fuel-and-reliability design, not this grant.
Federal STCs: a fifty kilowatt-hour pack can still claim them. Still thousands. Still not NSW PDRS.
Remote commercial near mining service towns
Load shape. A depot, workshop, or lodge on the edge of Whyalla, Port Augusta, Roxby Downs, or Coober Pedy. Day trade plus night accommodation or yard lights. The feeder is long. Diesel already lives in the yard for the hours the wire is sick.
Solar vs battery. Same intuition as the workshop, with more weight on backup and on eating diesel hours. The commercial case is reliability and fuel. The grant, when it exists, is a bonus on a network-connected site.
Same seventy-five thousand cap
One hundred and fifty kilowatt-hours of battery is forty-five thousand dollars. Another one hundred and twenty kilowatts of solar is thirty thousand. Cap full — when a round is open and the ABN qualifies.
Not this calculator
A multi-megawatt-hour mining job is Australian Renewable Energy Agency (ARENA) project funding, a state strategic grant, or a power-purchase agreement. Competitive, site-specific money. Not a rebate stamp for every diesel site.
Powering Business is not a mining-capex tool. Large primary-generation solar farms are excluded. An islanded camp with no network connection is out.
Federal STCs remain thousands on a small eligible battery. They do not become eight hundred and eighty thousand dollars because the town is near a mine. That six-figure neighbourhood is NSW PDRS on a multi-megawatt-hour grid battery, or someone forgot the caps.
Three buckets. Do not mix them.
Small batteries: federal STCs, roughly low thousands. SA grants: up to seventy-five thousand dollars when a round is open. Big six-figure “rebates” are almost always NSW peak-demand certificates on a multi-megawatt-hour battery — or someone forgot the caps.
Why a battery can still make sense
Tariffs, backup, honest stacking, and diesel hours — with or without a live grant — live in Why commercial batteries can make sense in SA.
Want a sketch for the real shed?
If you want a plant sized for the load you actually run — Adelaide Hills, regional SA, or a mining-adjacent depot — talk to The Off Grid Shop.
Prefer to talk it through? Call or text 0483 927 257 — Lismore HQ, local voices.
Grant questions, answered
Are these real named customer jobs?
No. These are design examples. They are not named customer case studies.
Is the South Australia Powering Business grant open in September 2026?
Round 3 closed on 31 October 2025, or when the twenty million dollar pool ran out. As at 17 September 2026 a later 2026 round was unconfirmed. Confirm a live round on the SA Government grant page before treating the dollars as cash on a job.
What is the SA commercial grant cap?
Seventy-five thousand dollars per Australian Business Number (ABN), and also no more than half of eligible out-of-pocket spend. The last published rates were three hundred dollars per kilowatt-hour of battery and two hundred and fifty dollars per kilowatt of solar installed with that battery.
Are Small-scale Technology Certificates a six-figure line?
No. Small-scale Technology Certificates (STCs) on an eligible battery are a few thousand dollars — about seven thousand at mid-2026 prices. Six-figure certificate lines belong to the New South Wales Peak Demand Reduction Scheme on a multi-megawatt-hour battery.
What does maximise the rebate mean under the cap?
Reach the seventy-five thousand dollar cap with solar kilowatts and battery kilowatt-hours the load will actually cycle. Extra battery past the cap is not an infinite rebate. It only grows the invoice.