Virtual power plants in summer: what to ask before you join
Verified 17 October 2026
A virtual power plant (VPP) lets a company use your battery in return for a benefit. Hot summer evenings are a time the grid is under strain, and a time a VPP may call on your battery. Here is what to ask before you say yes.
What a VPP is
It is a group of home batteries run together by a retailer or another company. The government's solar guide says the operator controls your battery for some or all of the time, in return for a benefit. Those benefits can include:
- lower electricity prices, or a zero bill guarantee,
- a higher feed-in rate,
- a discount on the battery itself, or
- a regular payment in place of a bill.
Why summer matters
The grid is under the most strain on hot evenings, when cooling demand is high. The Australian Energy Market Operator's report for January to March 2026 compared example homes. Those with solar and a battery kept sending power to the grid for longer in the evening peak (4pm to 9pm) than those with solar alone. A VPP is one way a battery can be used in that window.
What to ask before you join
- What do I get, and how does it show on my bill? Ask whether it is a credit, a lower rate or a payment, and when it appears.
- How often will you use my battery, and when? More use means more charging and discharging, which can shorten the battery's life.
- What happens in a blackout? A VPP can leave you with no stored power if the grid goes down. Some programs keep part of your battery back for that. Ask if yours does.
- Does it affect my warranty? Check with the battery maker as well as the retailer.
- Does my battery need the internet? Joining needs an ongoing connection.
- How do I leave? Ask how long the deal lasts and whether there is an exit fee. By law you have 10 business days to cancel a new energy contract without paying exit fees. A VPP agreement can have its own terms, so check how to leave it.
Each VPP has different benefits and different risks, and the government's guide says it can be hard to work out the best deal. Read the details before you sign, and look for reviews from other owners.
How PowerLens treats VPP offers
A bill can't price a VPP offer. Where your power goes hour by hour decides whether a VPP plan suits you, and only detailed meter readings show that. So PowerLens doesn't price VPP plans from a bill alone. Adding your meter data file (NEM12), the detailed usage record from your smart meter, is free. PowerLens then prices the electricity side of those plans against your real half hours and adds an estimate of the VPP benefit, based on VPP terms we check by hand.
PowerLens doesn't sign you up to a VPP or control your battery. Retailers never pay us, and they can't buy a place in your results. No saving is guaranteed.
Next: should you switch plans after a battery, or start with a recent bill.