VEU vs STCs — What’s the Difference and Can I Claim Both in Victoria?

If you’ve been getting quotes for a reverse cycle air conditioner, a heat pump hot water system, or solar panels in Melbourne, you’ve almost certainly seen the terms VEU, VEECs, STCs, and Solar Victoria rebate scattered across brochures and quotes — often without any clear explanation of what they actually are, how they differ, or whether you can combine them.

The short answer: they are completely different programs, run by different levels of government, covering different products, with different mechanics. And for hot water heat pumps in particular, you can legally and legitimately stack all three together — potentially saving thousands off a single installation. This guide explains everything in plain English.

Section 1 — The VEU Program and VEECs (Victorian Government)

What Is the VEU Program?

The Victorian Energy Upgrades (VEU) program is a state government initiative administered by the Essential Services Commission (ESC). It has been running since 2009 and was extended to 2045 by the Energy Upgrades for the Future Act 2025.

The VEU program works through a market-based certificate system. When a VEU Trusted Provider like Greentastic installs a qualifying energy-efficient system and decommissions an old inefficient one, they create Victorian Energy Efficiency Certificates (VEECs). Each VEEC represents one tonne of greenhouse gas emissions avoided. Greentastic sells those VEECs to electricity retailers — who are legally required to purchase them to meet annual emissions targets set by the Victorian Government — and the revenue is passed directly to you as an upfront discount on your invoice.

What Products Does the VEU Cover?

The VEU program covers a wide range of energy efficiency upgrades for Victorian households and businesses. The most significant for Melbourne homeowners in 2026 are:

• Reverse cycle air conditioning: replacing ducted gas heaters (up to $5,530 discount) or gas wall heaters (up to $1,610 per unit) with efficient reverse cycle systems
• Heat pump hot water systems: replacing old gas or electric storage hot water with a heat pump (discount of $447–$790 depending on what’s being replaced)
• Heating and cooling upgrades: replacing old split systems, resistance heaters, and evaporative coolers with high-efficiency reverse cycle alternatives
• LED lighting: commercial and industrial lighting upgrades (residential LED subsidies have ended)
• Draught proofing and insulation: ceiling insulation and draughtproofing for eligible homes

Notably, the VEU program does not cover residential solar PV panels — those are handled by a separate Solar Victoria program and the federal STC scheme.

Key VEU Facts at a Glance

Section 2 — STCs: Small-Scale Technology Certificates (Federal Government)

What Are STCs?

STCs are a federal government incentive administered by the Clean Energy Regulator (CER) under the Small-scale Renewable Energy Scheme (SRES). Unlike VEECs — which are a Victorian state certificate — STCs are available in every state and territory across Australia.

Each STC represents one megawatt-hour (MWh) of renewable electricity either generated or displaced by an eligible small-scale system. When you install solar panels or a heat pump hot water system, your installer calculates how many STCs you are entitled to and either trades them on the open market or assigns them to a registered agent, with the value passed to you as an upfront discount.

What Products Do STCs Cover?

• Solar PV panels (residential and small commercial, up to 100kW capacity)
• Solar hot water systems (solar collectors that heat water directly from the sun)
• Heat pump hot water systems (air-source heat pumps that heat water electrically using ambient air heat)
• Small-scale wind turbines and hydro systems (rare in residential context)

Importantly, STCs do NOT apply to reverse cycle air conditioners — even though heat pumps and reverse cycle AC use identical refrigerant technology. The STC scheme applies specifically to solar and water heating applications, not to space conditioning. For reverse cycle AC, the VEU program is the relevant incentive.

How the STC Deeming Period Works

The number of STCs you receive is calculated based on: (1) your system’s size, (2) your location’s solar zone rating (Victoria is Zone 4), and (3) the deeming period — the number of years remaining until the federal SRES scheme ends on 31 December 2030.

The deeming period decreases by one year on 1 January each year. In 2026, the deeming period is 5 years (down from 6 in 2025). This means the STC value of installing solar panels or a heat pump hot water system is approximately 15–20% lower in 2026 than it was in 2025. Every year of delay means fewer STCs and a smaller upfront discount.

Key STC Facts at a Glance

Section 3 — The Full Side-by-Side Comparison

Section 4 — Can You Claim Both VEU and STCs? (The Answer Product-by-Product)

This is where Melbourne homeowners get the most confused — and where the most money is left on the table. The answer depends entirely on which product you’re installing. Here is the definitive breakdown:

Reverse Cycle Air Conditioning — VEU Only (Not STCs)

When you replace a ducted gas heater or gas wall heater with a reverse cycle air conditioner, only the VEU rebate applies. STCs do not cover space heating and cooling systems. However, the VEU discount is substantial — up to $5,530 for ducted replacement or up to $1,610 per gas wall heater replaced. Greentastic applies this discount directly at invoice.

For more detail on reverse cycle rebates, see: VEU Rebate for Ducted Gas Heater Replacement Melbourne 2026.

Solar PV Panels — STCs + Solar Victoria Rebate (Not VEU)

When you install solar panels, STCs apply, but not VEU. Additionally, the Solar Victoria rebate of up to $1,400 (plus an interest-free loan of up to $1,400) can be combined with STCs — so you can stack STCs (~$2,000–$3,000) + Solar Victoria rebate ($1,400) on the same solar installation. These two programs are explicitly designed to work together.

For more detail, see: How to Prioritise Home Energy Upgrades in Melbourne for Maximum ROI.

Heat Pump Hot Water Systems — VEU + STCs + Solar Victoria (Triple Stack)

This is the most powerful rebate stack available in Victoria in 2026. For an eligible heat pump hot water system replacing an old gas or electric unit, all three programs apply simultaneously:

Source: How to Prioritise Home Energy Upgrades in Melbourne for Maximum ROI — Greentastic | energy.vic.gov.au

Solar Batteries — Federal Cheaper Home Batteries Program (Not VEU, Not Standard STCs)

Solar battery storage falls under its own federal program — the Cheaper Home Batteries Program introduced from 1 July 2025. This provides approximately 30% off eligible battery systems, with no income test. STCs do apply to batteries but under separate, more limited rules (government purchases battery STCs directly rather than through the open market). The VEU program does not cover residential solar batteries.

The Complete Product-by-Program Matrix

Section 5 — Real Melbourne Example: Whole-Home Upgrade with Every Rebate

Here is a worked example of a typical 4-bedroom Melbourne home completing a full electrification upgrade with Greentastic as their VEU Trusted Provider. All rebates are applied at invoice — no government portals, no waiting:

Source: How to Prioritise Home Energy Upgrades in Melbourne for Maximum ROI 2026 — Greentastic (confirmed government-sourced figures)

Section 6 — 5 Common Mistakes Melbourne Homeowners Make with These Rebates

1. Assuming VEU and STCs are the same thing. They are entirely separate programs run by different levels of government, covering different products, with different eligibility rules. Confusing them can lead to missed savings or incorrect expectations about what your installer can claim on your behalf.
2. Thinking you need to apply separately for each rebate. You don’t. Greentastic as your VEU Trusted Provider handles all VEEC paperwork. Your installer handles all STC assignment. The Solar Victoria rebate requires your installer to register online before installation. You sign one consent form — Greentastic coordinates the rest.
3. Waiting too long and losing STC value. STC values decline every 1 January as the deeming period shrinks. A hot water heat pump or solar panel installation that attracts a $3,000 STC discount today will attract progressively less in 2027, 2028, and beyond as the scheme approaches its 2030 end date.
4. Claiming Solar Victoria rebate before getting pre-approval. Unlike VEU and STCs (which are applied at invoice), the Solar Victoria hot water rebate requires pre-approval through the Solar Victoria portal before installation begins. If installation proceeds before the QR code is issued, the rebate may be forfeited. Greentastic manages this process for you.
5. Assuming rental properties don’t qualify. Both VEU and STCs apply to rental properties as well as owner-occupied homes. The Solar Victoria rebate requires the owner-occupier to be eligible, not tenants. From 1 March 2027, Victorian landlords have a legal obligation to replace end-of-life gas heaters and hot water systems with efficient electric alternatives — making these rebates directly relevant to every Victorian landlord. See: VEU Rebate for Rental Properties — Landlord Guide Victoria 2026

Section 7 — How Greentastic Applies Both VEU and STCs for You

As a VEU Trusted Provider serving Melbourne and all Victorian suburbs, Greentastic is accredited to create VEECs on your behalf and acts as a registered STC agent. This means for any eligible upgrade:

• Free home assessment — Greentastic confirms VEU eligibility, checks your property against the VEU Register, and identifies every rebate combination available for your specific situation
• Fixed-price written quote — your quote shows the gross installed cost, every rebate applied (VEU discount, STC value, Solar Victoria rebate if applicable), and your net out-of-pocket cost. No surprises.
• Pre-approval handled — for Solar Victoria rebates, Greentastic manages the portal submission and QR code generation before the installation date
• Installation by licensed team — A-grade electricians and licensed plumbers complete your installation to VEU compliance standards
• All certificates created — Greentastic creates and registers your VEECs with the ESC and assigns your STCs to the CER on your behalf. You don’t log in to any government website.
• Compliance documentation provided — Electrical Certificate of Safety (CoES), VBA plumbing certificate, and all VEU documentation issued at completion

Frequently Asked Questions

Can I claim VEU and STCs in the same calendar year?

Yes — confirmed in Greentastic’s ROI guide. VEU discounts, STCs, Solar Victoria rebates, and the federal battery program are all separate programs and can all be claimed in the same calendar year. Greentastic manages all rebate paperwork across every program simultaneously for whole-home projects.

Does the Solar Victoria rebate count toward my VEU minimum contribution?

No. The VEU program requires a minimum customer contribution ($1,000 inc. GST for ducted/multi-split systems). The Solar Victoria rebate is a separate payment that does not affect this requirement. Your invoice shows all rebates and your final contribution clearly.

What if my household income is over $210,000 — do I still qualify for anything?

Yes. VEU has no income test — high-income households qualify for the full VEU discount on reverse cycle AC, heat pump hot water, and other eligible upgrades. STCs also have no income test — all Australian households qualify. Only the Solar Victoria rebate (for solar panels and hot water heat pumps) has an income threshold of $210,000 combined household taxable income. Over that threshold, you still receive VEU + STCs.

My gas heater still works — can I replace it now and still claim VEU?

Yes. You do not need to wait for your gas heater to break down. In fact, proactive replacement while it still works gives you more choice of system, installer, and installation date. The VEU rebate does not require the old system to be broken — only that it exists and is decommissioned as part of the installation. See: VEU Rebate for Ducted Gas Heater Replacement Melbourne 2026

Is there a limit to how many times I can claim VEU at the same property?

Yes. There is a maximum of 5 VEU claims per domestic property at the time of writing, according to the ESC. Each claim can generate up to 90 VEECs, meaning a property could theoretically generate up to 450 VEECs in total across all eligible upgrades. For most Melbourne homes, 1–3 claims (ducted gas heater, wall heaters, hot water) cover the major opportunities.

Which rebate is bigger — VEU or STCs?

For reverse cycle air conditioning, VEU is the only option and delivers the higher value (up to $5,530–$7,200 for gas heater replacements). For heat pump hot water systems, STCs deliver the larger individual value (~$2,500–$3,000) compared to the VEU discount (~$447–$790) — but stacking all three programs for hot water produces the most total saving. For solar panels, STCs are the primary federal incentive and typically deliver $2,000–$3,000+.

Related Greentastic Guides

• How to Prioritise Home Energy Upgrades in Melbourne for Maximum ROI (2026 Guide)
• VEU Rebate for Ducted Gas Heater Replacement Melbourne 2026 — Step by Step
• Benefits of Replacing Your Hot Water System with a Heat Pump in Melbourne
• Maximising Comfort and Efficiency: Upgrading Gas Heating Under the VEU Program
• Air Conditioner and Hot Water Heat Pump Installation in Melbourne
• The Difference Between STC, VEU & Solar Victoria Rebates — Greentastic

Government & Official Sources

• Heating and Cooling Discounts — Victorian Energy Upgrades (energy.vic.gov.au)
• Victorian Energy Efficiency Certificates — Essential Services Commission (esc.vic.gov.au)
• Small-Scale Technology Certificates — Clean Energy Regulator (cer.gov.au)
• Solar Victoria Hot Water Rebate — solar.vic.gov.au
• Save with an All-Electric Home — energy.vic.gov.au