Instant asset write-off, STC discounts and rising grid tariffs mean WA businesses are seeing full payback in under 3 years. Here's the maths.
Why the numbers are so good right now
- Synergy business tariffs up 21% since 2023
- STCs discount ~30% of upfront cost
- Instant asset write-off allows immediate depreciation for eligible businesses
- Peak-demand charges slashed by self-consumption
Example: 100 kW warehouse system
| Amount | |
|---|---|
| System cost (before rebate) | $110,000 |
| STC discount | −$33,000 |
| Net investment | $77,000 |
| Annual bill savings | $28,000 |
| Payback period | 2.75 years |
| 25-year net benefit | $620,000+ |
Financing without capex
- PPA (Power Purchase Agreement): no upfront cost, pay per kWh at ~40% below grid
- Chattel mortgage: own the asset, deduct interest + depreciation
- Operating lease: off-balance-sheet, 100% deductible payments
What sectors are installing right now?
- Cold storage & food processing (24/7 load = fast payback)
- Manufacturing (high daytime demand)
- Aged care & hospitality
- Warehousing (huge unused roof space)
Book a free feasibility study — we'll model your actual interval data and produce a bank-ready business case.
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