Batteries for business: rebates, sizing and when they pay off

Batteries for business are more complicated than for households. The rebates differ by size and state, the savings depend heavily on your tariff, and some of the value (backup) doesn’t show up on a bill at all. This guide explains the discounts, where the money comes from, and how to size one. For a household view, see our guide to the Cheaper Home Batteries Program.

Can a business get the Cheaper Home Batteries discount?

Yes, if the battery and the premises meet the rules. The Clean Energy Regulator’s solar battery page says the program supports households and businesses, and sets these conditions:

You can check a model on the Clean Energy Council’s approved battery list and an installer on Solar Accreditation Australia’s status check. A virtual power plant (VPP) links batteries so an operator can use them together to support the grid. The Regulator’s VPP page explains the capability requirement, and our guide to virtual power plants covers whether to join one.

How big is the federal discount for a business battery?

It is calculated the same way as for households. From 1 May 2026 the factor tapers with battery size: the first 14 kWh earns 100% of the factor, the next 14 kWh earns 60%, and the portion from 28 to 50 kWh earns 15%. The factor is 6.8 certificates per kWh for installations from May to December 2026, then 5.7 from January to June 2027. The date that counts is the installation date, not the contract date. This table uses our own arithmetic from those published rules, rounded, with $35 per certificate as an assumed price.

The last two rows are the same because only the first 50 kWh counts. A larger battery gets no more from the federal scheme, which is why the percentage discount shrinks as size grows. Use our battery discount calculator for a specific size, date and certificate price.

What is the NSW business battery discount?

From 1 September 2026, NSW businesses can get an upfront discount on a battery under the Peak Demand Reduction Scheme. The NSW Government’s batteries for businesses page sets out the basics, and our NSW business battery discount guide goes through the steps. In summary:

• Eligible batteries are from 20 kWh to 30 MWh. There is no current closing date.
• The discount is indicative: about 30 to 40 per cent off if installed with a new or additional solar system, or about 20 to 30 per cent for a battery alone. The actual amount varies with the installer, location, battery model and the costs of securing the discount.
• For the higher rate, new solar must be installed within 90 days before or after the battery. If you already have solar, extra capacity equal to at least 25% of the new battery’s capacity is needed.
• From 20 to 200 kWh, you make a minimum payment toward the battery and installation. From 200 kWh to 30 MWh, no minimum payment applies.
• Residential buildings, data centres and off-grid businesses are excluded, and so are batteries commissioned before 1 September 2026. You also need planning approval.
• You can combine it with the federal battery discount if you meet both sets of rules.

Where does a business battery make money?

A battery doesn’t generate anything. It moves energy in time, and the value depends on what that is worth to you. There are three main sources:

Using more of your solar

A battery stores midday solar surplus and releases it in the evening. That raises self-consumption, so exports at 3 cents or so turn into avoided imports at 25 cents or more. The gain is only as big as your surplus. If your business already uses most of its solar in the day, a battery adds little. See is commercial solar worth it.

Cutting demand charges

Many business tariffs charge for your highest half-hour of demand in a month, on top of the energy you use. A battery can discharge during that peak to shave it. The saving depends on your tariff and how spiky your load is, and one missed peak in a billing period can undo the benefit. Our demand charges guide explains how to read yours.

Backup power

If an outage would spoil stock, stop production or shut the doors, backup has a real dollar value, but it won’t show on a bill. Confirm that the battery and inverter can actually supply your critical loads when the grid is off, and what that loads list is. Not every battery connected to solar provides backup.

Why do batteries often pay back slower than solar?

Solar creates energy and a battery only shifts it, so a battery has to earn its whole cost from the difference between the price of energy at two times, plus any demand and backup value. It also loses some energy in storage, wears out after a set number of cycles, and its warranty and replacement are costs of their own. Both discounts above cut the up-front price, but they cover only part of it. In the worked examples in our worth-it guide, solar alone often pays back in a few years. Treat a battery as a separate investment with its own payback, and run the numbers before bundling it into a solar quote.

How do I size a business battery?

Start with data, not a brochure:

• Get 12 months of half-hourly interval data from your retailer or network. It shows when you use power and when your peaks occur.
• Work out your evening or overnight use that solar could have supplied. That is the energy a battery could displace.
• If you have a demand charge, find the peaks. Check how long they last, since a battery sized for a 30-minute peak may not cover a two-hour one.
• List the loads you need during an outage, and for how long.
• Size to the smaller of surplus solar and the load you want to shift, and compare the cost of each size, not just the headline rebate.

Our commercial solar calculator leaves out batteries and demand charges on purpose, so use a quote with a worked battery model for those. Ask installers to show assumptions, not only results.

Questions to ask before buying: what usable (not nominal) capacity is on the quote, how many certificates the federal discount is applying and at what price, how the warranty counts cycles, and whether a VPP or demand tariff changes the warranty.

This guide is general information, not financial or legal advice. Rules, rebates and prices change, so check the linked sources before you decide. Facts checked 31 October 2026.