Synergy battery rewards: how VPP earnings actually work

What is Synergy battery rewards?

Synergy Battery Rewards is Western Australia's Virtual Power Plant (VPP) program for the SWIS network. When you join, Synergy can remotely discharge your battery during peak demand (typically 3–9pm on very hot or very cold days) to help stabilise the grid. In return, you receive VPP activation credits at 70¢/kWh during events — roughly $100–180/year for a 10–13 kWh battery in the modelled scenarios below. The program is currently open only to customers installing a compatible battery through the WA Residential Battery Scheme.

How much can you earn?

Battery Rewards pays 70¢/kWh during activation events, and Synergy runs no more than 30 of them a year. The modelled range below assumes 15–25 events at ~70% discharge:

These figures cover activation credits only. DEBS peak exports (10¢/kWh, 3–9pm) add another $50–100/year in the same modelled scenarios. Day-to-day self-consumption from the battery is the larger driver of bill reduction (~$1,000–1,500/year, modelled).

Eligibility requirements

How VPP events work

When grid demand is high — typically consecutive 30–35°C+ days when air-conditioning load peaks across the network — Synergy may trigger a VPP event:

1. No advance notice: Synergy does not tell you an event is coming. Events and credits appear on your quarterly activity statement.
2. Standby window: for about two hours beforehand the battery is held and charged to full so there is more to deliver.
3. Battery discharge: Synergy remotely discharges the battery to export to the grid, typically for 2–4 hours inside the 3–9pm peak. Your household load is served first; the excess is exported.
4. Payment: 70¢/kWh VPP activation credit, plus DEBS peak export (10¢/kWh) on the exported kWh. Grid energy used during the standby window is compensated with energy offset credits.
5. Recharge: the battery recharges overnight or from solar the following day.

Battery wear

VPP participation adds some cycling. The figures most installers and warranty documents quote:

• Event frequency: capped at 30 activation events per year, not daily.
• Partial discharge: Synergy typically discharges 50–80% of usable capacity per event.
• Warranty impact: adds roughly 2–4% to the annual cycle count.
• Trade-off: the ~$100–180/year credit on a 10–13 kWh battery is modelled to exceed the marginal wear cost.

Most battery warranties allow 4,000–6,000 cycles over 10 years. VPP adds at most 30 cycles per year, small against daily self-consumption cycling. Energy Policy WA frames it as the VPP accessing the battery for less than 2% of the year, with the same effect on battery life as normal household use. Always confirm how VPP cycles count under your specific warranty.

VPP vs DEBS: what's the difference?

Key point: both can run together. VPP members still earn DEBS export rates on kWh sent during a dispatch, in addition to the 70¢/kWh activation credit.

VPP and the WA battery scheme

Under the current WA framework, VPP participation (Tier 2 registration) is required to access the WA Battery Scheme benefits:

• $130/kWh rebate up to $1,300 (10kWh max eligible) for Synergy customers
• Up to $10,000 interest-free loan (household income threshold: $210,000)

Note: Battery Rewards is a contract you sign up to, not an automatic enrolment. Your installer handles the Tier 2 registration during commissioning. The agreement runs an initial two-year term — during that term you can only end it if you no longer live at the property or life-support equipment is required there. After the initial term you can leave at any time on a minimum of 20 business days' notice.

How to join

1. Check SSL compatibility: confirm your inverter and battery models are listed under DER-Storage on Synergy's Supported Solutions List.
2. Be on an eligible tariff: Home Plan (A1), Home Business Plan (K1), Midday Saver, or the Electric Vehicle Add On.
3. Installation and registration: the installer handles Tier 2 registration and commissioning tests against Synergy's utility server.
4. Sign the Battery Rewards agreement: arranged at commissioning, on an initial two-year term.
5. Payment start: activation credits begin once commissioning is complete.

Is VPP worth it?

In the modelled scenarios above, the annual credit (~$100–180 for a 10–13 kWh battery, based on 70¢/kWh × 15–25 events × ~70% discharge) sits well above the marginal cost of the added cycling. DEBS export rates still apply during a dispatch.

Where VPP fits less well: a household that needs full battery capacity reserved for evening peak (heavy machinery on a workshop circuit, peak-window EV charging, or backup-first sizing) may prefer to stay out and keep manual control — but that also forfeits the WA Residential Battery Scheme rebate and loan, and the two-year term means the decision is not easily reversed once signed. You can set a reserved minimum charge in your battery app that Synergy cannot draw on during an event, though raising it reduces the credits you earn. Most households find dispatch events do not materially affect daily usage.