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Updated March 2026
Battery hardware has become cheaper, and the WA policy framework that took effect on 1 May 2026 now pays a directly-quotable rate for VPP activation. This page is an opinionated read of what those two shifts mean for a Perth household sizing a system in 2026.
When solar feed-in tariffs in WA fell from the legacy net feed-in rates to today's DEBS rates (10c/kWh peak, 2c off-peak), uptake did not collapse. The value proposition moved from export credits to self-consumption: a kWh you make and use is worth roughly the A1 retail rate of 32.37c/kWh, rather than the export rate. Battery storage extends the same logic by shifting more solar into self-consumption.
Under the 2026 framework, batteries earn from three stacked sources: avoided purchases at the A1 rate, DEBS export credits during the 3pm–9pm peak window, and Synergy Battery Rewards activation credits at 70¢/kWh during VPP events. The household's share of each depends on system size, usage pattern, and tier.
Specific market-size and CAGR figures vary by source and forecast vintage, so this section sticks to direction rather than putting a number on it. Where a figure is cited below, it traces to a WA-policy or Synergy source — not to an industry forecast.
Stationary storage demand continues to track EV cell production, with most cell output going to vehicles and a smaller (but growing) share to grid and home storage. Next-generation chemistries such as solid-state are in pilot stages as of 2026, and are not yet available in CEC-listed home batteries.
Federal policy on home batteries took effect on 1 May 2026 alongside the WA framework: STCs are now available for storage, with capacity-banded tapering from 5–14 kWh (full entitlement) up to 50 kWh (15% entitlement) and a stated taper schedule running to 2030. The combined federal STC and state rebate move the net price of an eligible battery down at the point of purchase.
WA-specific policy levers (verified): the WA Residential Battery Scheme pays $130/kWh up to a $1,300 cap on the first 10 kWh of usable capacity for Synergy customers, with a 5 kWh minimum. DEBS pays 10c/kWh peak (3pm–9pm) and 2c off-peak. Synergy Battery Rewards pays 70¢/kWh during VPP activation events. CSIP-AUS compliance and Synergy SSL listing are required for scheme eligibility. These figures source from @wattmate/wa-policy; check the calculator for a per-household estimate.
From 1 May 2026, Synergy Battery Rewards pays 70¢ per kWh during VPP activation events. Annual earnings depend on event count and duration — in our modelled cases, a 13.5kWh battery on the standard 30 events/year cap with ~2.5-hour events ends up in a low-three-figure range, before adding DEBS export credits at 10¢/kWh peak (3pm–9pm).
Under the new customer tiers, Tier 2 VPP participants get a dynamic export limit — the network sets the allowable export each interval, against an aggregate connection limit of 30 kVA. Tier 1 (ESM, non-VPP) is capped at 5 kW, and Tier 0 at 1.5 kW.
Synergy's A1 tariff is 32.37c/kWh and the daily supply charge is 116.05c (as of 1 July 2025; 2026 rates not yet announced). Every kWh shifted from grid import to self-consumption avoids that A1 rate. DEBS export pays much less (2–10c/kWh), so the payback case rests on self-consumption, not export.
Stacked rebates apply at the point of sale. The WA Residential Battery Scheme pays $130/kWh up to a $1,300 cap on the first 10 kWh of usable capacity. Federal STCs apply on top, with capacity-banded tapering across 2026–2030. Net out-of-pocket varies with system size, brand pricing, and install date — installer quotes are the authoritative figure for any specific system.
From 1 May 2026, CSIP-AUS compliance (the IEEE 2030.5–based protocol documented in SA HB 218:2023) and Synergy SSL listing are mandatory for WA Battery Scheme eligibility. Equipment that meets these requirements remains eligible for current and future Synergy VPP programs; equipment that does not, will not.
Solar Batteries Perth is an independent information site. We are not an installer and not a manufacturer; we publish product data, WA-specific calculators, and CEC-listing analysis so a household can check a quote against the underlying numbers.
Email us at admin@wattmate.com.au if a figure on this page looks wrong or out of date and we'll check it against the source.
Use Find My Battery to estimate rebate, payback, and matched installers for a specific Perth address — rather than the generalised figures above.