Should you take the 'free' heat pump hot water offer? Usually don't — and the reason is arithmetic, not outrage.

Not literally free, no — and a genuinely $0 offer is not compliant with either state scheme. In Victoria, hot water upgrades under the Victorian Energy Upgrades program carry a mandatory minimum customer contribution of $200 including GST, and in New South Wales the Energy Savings Scheme requires a minimum co-payment of $200 excluding GST — $220 with GST — after the rules were tightened in 2024. So a compliant 'free' offer is really a two-hundred-dollars-and-up offer, and anyone quoting literally zero dollars should make you cautious immediately. The mechanism behind the discount is legal and real: installing an efficient heat pump creates tradeable energy-efficiency certificates — VEECs in Victoria, ESCs in NSW — which you sign over to the provider, who sells them, on top of any state rebate. The subsidy is genuine. The problem is what the near-zero price usually selects for: the cheapest approved hardware, high-volume installs and thin after-sales support.

Through certificates, not charity. When a heat pump replaces an inefficient electric or gas water heater, the installation creates energy-efficiency certificates — VEECs under the Victorian Energy Upgrades program, ESCs under the NSW Energy Savings Scheme — representing the energy the upgrade is expected to save over its life. You assign those certificates to the provider as part of the paperwork, and the provider sells them. On a quality unit installed properly, that certificate value takes a healthy chunk off a real price. But on the cheapest imported hardware, certificate revenue plus rebates can cover most of the seller's hardware and installation cost — which is why near-free blitz offers overwhelmingly feature entry-level units you have never heard of. The maths only works at speed and scale with minimal cost per job. That is not an accusation against every operator; it is simply the arithmetic that explains why the flyer, the ad or the knock exists.

The catch is rarely the price itself — it is what the price selects for, and the regulators have documented the pattern. In March 2023 the NSW scheme administrator, IPART, published a formal notice about heat pump water heater installations: units not fit for purpose — oversized, undersized or wrong for the site — incorrect installations creating safety issues, old water heaters left on site, and even staged photos used to claim ineligible sites. NSW responded in 2024 by lifting the minimum customer payment from $33 to $200 excluding GST, and Victoria banned cold-call telemarketing from 1 May 2024 and doorknocking from 1 August 2024 under the VEU program — bans introduced specifically because of pressure-selling complaints. Beyond compliance, the longer-term catch is the unit itself: winter performance, noise, refrigerant, warranty depth, and whether the company that installed it still exists when you need a warranty honoured.

Not all of them, and it would be dishonest to claim every discounted unit is junk — both schemes only pay certificates on systems from approved product registers. But the incentive structure pushes the free-offer channel toward the cheapest approved hardware, and industry observers have warned about a wave of low-cost units with marginal real-world efficiency entering Australia on the back of subsidy schemes. The practical differences show up later: how well the compressor performs on cold mornings, how loud the unit is beside a bedroom wall, the refrigerant it uses, how many years the tank and compressor warranties actually run — and whether the installer will still answer the phone. Judge the specific unit, not the discount: ask for the brand and model in writing, look up independent reviews, and compare the warranty terms line by line against a quality unit.

When four things line up. First, you were already planning to replace your hot water system — a subsidy is a reason to choose a heat pump, not a reason to replace a working system you had no plans to touch. Second, the quote names a quality unit — brand and model in writing — that reviews well independently, not just 'a heat pump'. Third, it is installed by a reputable local installer who will answer the phone in year five, with warranty terms you have actually read. Fourth, the paperwork is compliant: you are charged at least the legal minimum co-payment for your state and you understand you are assigning the certificates. Meet all four and a subsidised heat pump is a genuinely good deal — heat pump hot water is excellent technology done right. Our separate guide on whether heat pump hot water is worth it covers the economics and the specs that separate quality from junk.

Yes — and we would rather tell you that plainly than pretend otherwise. Mission Green sells heat pump hot water systems, so a paid installation earns us more than you taking a free-offer unit does. That conflict of interest is exactly why this page shows its working: the co-payment rules, the certificate economics and the regulator findings are all sourced so you can check them without trusting us. And the test cuts both ways — run the same checklist on us: named unit, warranty terms in writing, refrigerant, noise rating, winter performance, an installer who answers the phone. If a subsidised offer passes that checklist, take it with our blessing. If neither the free offer nor our quote stacks up, keep your current system until it dies — that is sometimes the honest answer too.