If you have been looking at solar batteries in Perth, you have almost certainly come across the term VPP — Virtual Power Plant. It comes up in two important contexts: as a requirement of the WA Residential Battery Scheme, and as a source of ongoing bill credits through Synergy Battery Rewards. For some homeowners, joining a VPP sounds like handing control of their battery to someone else. It does not work that way. This post explains exactly what it means, what you actually agree to, and the one detail about Tesla Powerwall 3 that almost no one mentions.
What Is a VPP?
A Virtual Power Plant is a network of home batteries coordinated to act like a single large power source. When the electricity grid comes under pressure — during a Perth heatwave when air conditioners are running flat out across the city, for example — the VPP operator draws small amounts of stored energy from each participating battery to help stabilise supply. The process happens automatically in the background. You will not notice it.
In Perth and the South West Interconnected System (SWIS), the primary VPP program for residential battery owners is Synergy Battery Rewards, operated by WA’s state-owned electricity retailer.
Synergy Battery Rewards: How It Works Day to Day
Synergy Battery Rewards is the VPP that most Perth battery owners will participate in, either voluntarily or as a condition of the WA Residential Battery Scheme.
What actually happens during a VPP event
Before an activation event, Synergy places your battery into a standby window. During this window, your battery is charged to full in preparation — Synergy covers any energy charges you incur during this process. When the activation event starts, Synergy remotely exports a portion of your stored energy to the grid. After the event ends, your battery returns to normal household operation.
The financial return: 70 cents for every kilowatt-hour exported during the event. Those credits appear on your next Synergy electricity bill.
The numbers that matter
At the maximum possible frequency and duration, VPP events account for less than 2% of the year. Your battery operates entirely for your household the other 98% of the time.
What you earn
For a 15 kWh battery fully discharged during a single event, that is $10.50 in bill credits. Across the maximum 30 events per year, that could reach $315 annually — on top of all the savings your battery already generates through self-consuming your own solar energy. Over the two-year minimum commitment and beyond, VPP participation is a genuine income stream, not a cost.
In practice, Synergy does not always run the full 30 events, and batteries are not always fully charged at the start of every event. A realistic figure for most Perth homes is $100–$200 per year in additional bill credits.
The WA Battery Scheme and the Plenti Loan: What the VPP Obligation Means
The WA Residential Battery Scheme provides eligible homeowners with a state rebate of up to $1,300 and access to a no-interest loan of up to $10,000 through Plenti, for households with combined annual income under $210,000. To access either benefit, VPP participation is mandatory.
Important: Tesla Powerwall 3 is not eligible for the WA Residential Battery Scheme rebate or the Plenti no-interest loan. Tesla buyers can access the federal CHBP rebate only. The WA scheme — including the Plenti loan — applies to Sungrow SBH, SigEnergy SigenStor, iStore, Fronius Reserva, and BYD Battery-Box installations.
The obligation is more limited than most people expect:
- Minimum VPP commitment is two years from your installation date
- After two years, you can opt out, switch to a different eligible VPP, or stay enrolled
- Leaving the VPP after two years does not affect your Plenti loan — you continue repaying under the original schedule
- The loan and the VPP obligation are separate — opting out of VPP does not cancel or accelerate the loan
For homeowners who took the Plenti no-interest loan: the two-year VPP obligation runs from installation, then you are free to choose. Loan repayments continue independently on the agreed schedule regardless of what you do with VPP after the two-year period.
What About Tesla Powerwall 3 and VPP?
Tesla Powerwall 3 is not part of Synergy Battery Rewards and is not eligible for the WA Residential Battery Scheme or the Plenti no-interest loan. This means Tesla owners in WA do not have a mandatory or voluntary VPP obligation — and as a result, Tesla’s unlimited cycle warranty applies in full.
Tesla Powerwall 3’s unlimited cycle warranty only applies when the battery is not participating in a VPP. Because Tesla is not connected to any WA VPP program, this condition is met by default and the unlimited warranty stands unaffected.
The trade-off is that Tesla owners cannot access the 70c/kWh Synergy Battery Rewards credits, the WA scheme rebate, or the Plenti no-interest loan. For buyers who want to stack all available incentives, Sungrow SBH, SigEnergy SigenStor, iStore, Fronius Reserva, and BYD are all VPP-eligible and scheme-eligible. For buyers who prioritise the Tesla ecosystem and the unlimited cycle warranty, the trade-off is real but so is the product.
How Positive Energy Solutions Batteries Compare on VPP
Tesla Powerwall 3 is not part of Synergy Battery Rewards and is not eligible for the WA Residential Battery Scheme or Plenti loan — federal CHBP only. All other batteries listed are eligible for both CHBP and the WA Residential Battery Scheme, including the Plenti no-interest loan.
Does VPP Participation Damage Your Battery?
No. A VPP event discharges your battery the same way running the dishwasher or charging an EV does. The battery chemistry does not distinguish between a household load and a grid export event. Modern lithium iron phosphate (LFP) batteries are rated for thousands of charge cycles. The additional cycling from 30 or fewer VPP events per year is negligible compared to the daily cycling that makes up the vast majority of battery use.
The only nuance is the warranty framing specific to Tesla — not because VPP damages the battery, but because Tesla’s warranty terms distinguish between VPP and non-VPP use.
Talk to Positive Energy Solutions About VPP and Your Battery
Positive Energy Solutions installs Sungrow SBH, SigEnergy SigenStor, iStore, Fronius Reserva, and BYD Battery-Box — all of which are compatible with Synergy Battery Rewards and eligible for the WA Residential Battery Scheme, including the Plenti no-interest loan. We handle VPP enrolment as part of the installation process for all eligible systems. We also install Tesla Powerwall 3, which is not part of Synergy Battery Rewards but carries its unlimited cycle warranty unaffected.
Every Positive Energy Solutions installation includes Omnidian performance monitoring, giving you independent visibility of how your system is performing through and outside of VPP events. Contact us for a no-obligation quote and discussion of how VPP applies to your specific situation.
Related guides
- Fronius GEN24 PLUS Backup Power for Perth Homes
- SigEnergy SigenStor Backup Power for Perth Homes
- Sungrow Solar Battery Backup Power for Perth Homes
- Tesla Powerwall 3 Backup Power for Perth Homes
Frequently Asked Questions
Do I lose control of my battery if I join a VPP?
No. Joining Synergy Battery Rewards does not transfer ownership or primary control of your battery. Your battery’s first job remains powering your home. VPP activation is capped at 30 events per year, each no longer than 6 hours. The rest of the time, your battery operates entirely for your household.
What happens during a grid outage while I am in the VPP?
Your battery switches to backup mode and powers your home exactly as it would if you were not in the VPP. Grid outages immediately suspend any VPP operation — your stored energy stays in your battery for your home. This is a fundamental design requirement of how these systems operate.
Can I join Synergy Battery Rewards if I do not take the WA Battery Scheme rebate?
Yes. Synergy Battery Rewards is open to any eligible battery owner on the SWIS, regardless of whether you accessed the state rebate or Plenti loan. If you want the 70c/kWh credits without the scheme, you can enrol voluntarily with no two-year minimum attached.
Can Tesla Powerwall 3 join Synergy Battery Rewards?
No — Tesla Powerwall 3 is not part of Synergy Battery Rewards and is not connected to any WA VPP program. Tesla is also not eligible for the WA Residential Battery Scheme rebate or the Plenti no-interest loan. The federal CHBP rebate applies to Tesla. The upside: because Tesla is not in a VPP, its unlimited cycle warranty applies in full with no cycle-count limits.
How much can I realistically earn from Synergy Battery Rewards?
At 70c/kWh with a 15 kWh battery across 30 events per year, the theoretical maximum is around $315 in annual bill credits. Real-world figures are typically $100–$200 per year, depending on how many events Synergy runs and the charge level of your battery at the start of each event. Over a 10-year battery lifespan, consistent VPP participation can add $1,000–$2,000 in total bill credits.
What is the Plenti loan and how does it relate to the VPP?
Plenti administers the no-interest loan component of the WA Residential Battery Scheme. Eligible households can borrow up to $10,000 no-interest, repayable over up to 10 years. Accessing the loan requires VPP participation for the two-year minimum period from installation. After two years, you can exit the VPP — the loan repayment continues independently under the schedule agreed at installation.
About the Author
Jason Wiktorowicz
Sales Manager, Positive Energy Solutions | Perth, WA
Jason has been at the centre of Western Australia’s energy transition for over a decade. As Orchestration Lead on Project Symphony — WA’s largest virtual power plant pilot — and Stream Lead on Project Encore, he worked directly with AEMO, Western Power and Energy Policy WA to shape how distributed energy resources connect and operate on the SWIS. That work included developing and rolling out CSIP-AUS, now mandatory for all new WA grid connections. He also led Emergency Solar Management (ESM), the first program of its kind in WA, VPP for Schools (VPP4S), which provided direct market benefits through Supplementary Reserve Capacity, and REBAR, the WA Residential Battery Rebate scheme.
His earlier career spanned Synergy, Infinite Energy and Curtin University’s Sustainability Policy Institute, where he co-authored peer-reviewed research on net-zero urban precincts, solar integration and peer-to-peer energy trading, published in the journal Urban Planning in 2018.
At Positive Energy Solutions, Jason leads sales with a focus on system design accuracy and long-term performance. Positive Energy Solutions installs solar and battery systems, EV chargers and heat pumps, and holds partner accreditations with Fronius, SigEnergy, iStore and SunPower. Connect with him on LinkedIn.
