Home batteries
Virtual power plants in Melbourne: should your battery join one?
A virtual power plant (VPP) links home batteries over the internet so an operator can run them together, like one power station, and pays the owners in bill credits or other payments. For a Melbourne home, as anywhere in Victoria, joining is your choice: the federal battery rebate needs a battery that can join a VPP, not membership. New to batteries? Start with solar batteries.
In return you give up some control and add battery cycles. Weigh it against the Midday Power Saver’s free grid power from 11 am to 2 pm.
Updated
What is a virtual power plant?
The Clean Energy Regulator describes a virtual power plant as a network of small, distributed energy resources (like solar batteries) that together behave like a single power plant. Solar Victoria puts it simply: a VPP connects batteries in an energy sharing network, which helps manage energy flow and reduce reliance on the grid in times of higher demand.
- Connect: the battery and its inverter stay online. The Clean Energy Regulator says a VPP needs an ongoing internet connection to talk to the operator and respond to grid signals.
- Call: when the grid needs help, the operator calls an event. ARENA lists the jobs: responding to energy shortfalls, providing frequency control ancillary services and network support.
- Respond: the battery charges, discharges or holds its energy automatically, and you can watch it in an app or web portal.
- Get paid: the operator rewards you as its terms say, generally through direct payments or bill credits.
How often events happen, and how far the operator may run your battery down, are set by each VPP’s terms.
How do VPPs pay Victorian battery owners?
Each VPP sets its own rewards, and many combine them. Solar Victoria lists three, and the Clean Energy Regulator adds potential financial benefits from higher feed-in tariffs.
- Upfront battery discount: a discount that reduces the cost of installing the battery.
- Bill credits for energy shared: a credit on your bill for power your battery shares with the VPP.
- Bill discount: a discount on your energy bill while you are a member.
- A higher feed-in tariff: some VPP plans pay more for exported power. Victoria has had no minimum feed-in tariff since 1 July 2025.
Solar Victoria says what you save depends on which VPP program you join and how often your battery’s energy is shared into the VPP network. Count the whole year, not the sign-up credit: if the VPP requires its own electricity plan, a generous credit on a dearer plan can leave you worse off.
How to compare VPP plans
VPP offers change often and each has its own conditions, so we don’t publish a table of them. Compare the ones you’re considering on their own terms, and use the free Victorian Government tool, Victorian Energy Compare, to find the best plan you could have without one.
- Your battery is on its list. Solar Victoria warns that many VPPs accept only specific batteries. Check the exact battery and inverter model.
- You meet its conditions: a VPP may ask for a minimum solar or battery size, that you own the home, an internet connection and no life support equipment. The example below asks for all four.
- Price its plan. Work out a year on the plan the VPP requires, from your own usage, and set it against the best plan Victorian Energy Compare finds you without the VPP.
- Add a year of payments: sign-up, ongoing and per-event credits, noting which are paid when the battery isn’t used.
- Read the limits and exit terms: energy per year, how low it may drain the battery, contract length, exit fees, and whether you repay an upfront discount if you leave.
What one VPP’s terms look like
An example of what to read, not a recommendation: on 2 November 2026 the ENGIE VPP page, a VPP open to Victorians, named seven compatible battery brands, including AlphaESS but not Sungrow. Each brand then has its own model list, so check your exact battery. For Victorian sign-ups after 22 April 2026, ENGIE may charge, discharge or hold up to 400 kWh in your battery in a rolling 12 months: 40 times the capacity of the 10 kWh minimum battery it accepts (our arithmetic). Its monthly credits are paid even when the battery isn’t used. Terms change, so read the current page before you sign.
The battery rebate needs a VPP-capable battery, not membership
To earn the federal Cheaper Home Batteries Program discount, a grid-connected battery and its inverter must be able to join a virtual power plant. Joining is optional: when the battery goes in, later, or never. The Clean Energy Regulator notes that joining later may need upgrades. Solar Victoria says a VPP-ready system can respond to remote requests to charge or discharge the battery; report its state of charge and voltage and measure power flow at the battery terminals; and help keep the network secure and reliable.
Victoria’s own VPP pilot, for Solar Homes battery rebate customers, closed to new applications on 31 December 2022, and there is no Victorian battery rebate today.
What you give up when you join a VPP
- Control: Solar Victoria says you won’t have full control of your battery, because the VPP provider can access it at any time.
- Cycling and warranty: every event adds cycles. Solar Victoria says this could shorten the battery’s life or affect its warranty; see our batteries’ warranties.
- Backup reserve: energy the VPP sends out isn’t there for your evening or a blackout, so ask whether you can keep a reserve. Backup also depends on the inverter’s wiring: see home battery backup.
- Lock-in: Solar Victoria warns you might need a contract with a particular retailer, at its rates, or face an exit fee.
- An always-on connection: the battery has to stay online.
A VPP suits a battery that often sits full or idle, on a plan that still works out cheaper with the VPP’s conditions.
VPP vs Midday Power Saver vs a time-of-use plan
A VPP is one way to earn from a battery. The other two run it for your own bill: the Midday Power Saver, with free grid power from 11 am to 2 pm (up to 24 kWh a day) to charge it, or a time-of-use plan, where it covers the evening peak.
| Virtual power plant | Midday Power Saver | Time-of-use plan | |
|---|---|---|---|
| How the battery earns | Credits for letting the VPP use it | Charges free at midday, then covers the 4 pm to 9 pm peak | Stores solar for the 4 pm to 9 pm peak |
| Who runs the battery | The operator during events | You | You |
| Peak rate avoided | Set by the VPP’s plan | Up to 39.75c–49.82c per kWh | VDO 37.57c–47.64c per kWh |
| Main risk | Less control, more cycling, exit fees | Paying more if you can’t shift use to midday | Evening use once the battery is empty |
The Victorian Government estimates the Midday Power Saver saves $149 to $428 a year for households that move 5% to 30% of their use into the free hours. VPP earnings have no such benchmark. Whether a VPP works alongside a given plan is up to the VPP and the retailer.
Which of our batteries work with which VPPs?
Which battery brands we install is being confirmed; this table shows the two our previous website listed, Sungrow and Alpha ESS. Both makers’ datasheets name VPP use, but each VPP chooses which batteries it accepts, model by model. Your written quote names the exact battery and inverter, so you can check them against a VPP’s list before you sign.
| Battery | Datasheet on VPPs | Warranty and VPP use | On the ENGIE VPP list |
|---|---|---|---|
| Sungrow SBR with the SH-RS / SH-T hybrid inverter | “VPP Ready”: Sungrow SH8.0RS/SH10RS datasheet (AU, Version 2). Communication: RS485, WLAN, Ethernet, CAN. | Must be monitored in iSolarCloud. Ends at most 126 months after manufacture. No throughput limit for daily self-consumption and backup; 35.84 MWh for other uses on an SBR128. Any other use, or a mix that includes one, has the limit, so ask Sungrow how it counts VPP events. | Brand not listed |
| Alpha ESS SMILE-G3 with the SMILE-G3-S5 / B5 inverter | “Faster Response for VPP Control”: Alpha ESS SMILE-G3-S5/B5 datasheet (AU, V01, 11 December 2025). Communication: Ethernet, WiFi, Modbus, API. | This October 2024 document covers the SMILE-G3-S5 and SMILE-G3-B5 systems but is older than the 9.3 kWh module and doesn’t name it, so ask for the current terms with your quote. Capacity guarantee: throughput under 3.12 MWh per kWh of usable capacity. Installed by an SAA accredited installer with an Alpha Installer ID; needs an internet connection. By our arithmetic that limit is about 3,120 full cycles, or 8.5 years at one cycle a day, and VPP events add to it. | Brand listed, but not the SMILE-G3-BAT-9.3S module: its SMILE-G3 batteries are SMILE-G3-BAT-10.1P, SMILE-G3-BAT-9.3P and SMILE-G3-BAT-4.0S. One 9.3 kWh module is under its 10 kWh minimum. Ask ENGIE. |
Other VPPs accept other brands, so check each one. For sizes, backup and full warranties, see the Sungrow battery and Alpha ESS battery pages.
Virtual power plants: your questions
What is a VPP in solar?
A VPP, or virtual power plant, is a group of home batteries, usually charged by rooftop solar, that an operator links over the internet and runs together like one power station. The Clean Energy Regulator calls it a network of small, distributed energy resources (like solar batteries). The operator draws on the batteries when the grid needs support and pays members through direct payments or bill credits.
Do I need solar panels to join a virtual power plant?
Usually, yes. Solar Victoria says you need solar panels and a battery installed to take part in a VPP program, and each VPP sets its own minimums. One VPP open to Victorians, for example, asks for a 5 to 15 kW solar inverter and a battery of at least 10 kWh. Check the conditions before you buy a battery for a VPP.
Does joining a VPP affect my battery warranty?
It can. Solar Victoria says a VPP using your battery could shorten its life or affect its warranty, and the Clean Energy Regulator tells owners to check how discharges affect theirs. Some makers set no throughput limit for home self-consumption but do set one for other uses, so ask the VPP and the maker how events count before you join. Our batteries and VPPs
Does the Victorian Government pay households to join a VPP?
Not through Solar Victoria today. Its VPP pilot, which offered battery rebate customers a place in a VPP, closed to new applications on 31 December 2022, and Victoria has no battery rebate today. The federal Cheaper Home Batteries Program needs a battery that can join a VPP, but you don’t have to join. Payments for joining come from the VPPs themselves, and some offer a battery discount. The battery rebate
Which pays more, a VPP or the Midday Power Saver?
It depends on your home. The Victorian Government estimates the Midday Power Saver saves $149 to $428 a year for households that move 5% to 30% of their use into the free hours. A VPP pays what its terms say, on top of the plan it may require. Work out a year of each before you choose. Free electricity in Victoria
Is a VPP worth it for a Melbourne battery?
In Melbourne a VPP competes with your own evening peak. On the Victorian Default Offer, power from 4 pm to 9 pm costs 37.57c to 47.64c a kWh across the five network areas, from Jemena to AusNet Services, and a battery that empties into that peak every night avoids that rate on each kWh it supplies. Energy a VPP sends out during an event isn’t there for your evening.
So a VPP suits a Melbourne battery that often sits full, such as one bigger than your evening use. Before you sign, price a year on the VPP’s plan against your best plan on Victorian Energy Compare. At a free inspection our Mount Waverley team names the exact battery and inverter, so you can check them against a VPP’s list.
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