Heat Pump Hot Water Systems Compared: Neopower, Emerald, iStore, Powerbay & Midea
Heat Pump Hot Water Systems Compared: Neopower, Emerald, iStore, Powerbay & Midea
A side-by-side look at eight popular heat pump hot water models, plus exactly what you can currently claim under VEU, Solar Victoria and Federal STCs.
Hot water can account for up to 30% of a Victorian household’s energy use, and replacing an old electric or gas system with a heat pump can cut that cost by as much as 75%. But with so many brands and model numbers on the market, working out which system actually suits your home — and which rebates you qualify for — isn’t always straightforward. Here’s how eight commonly quoted systems stack up.
The systems at a glance
| System | Size | Model | Refrigerant | COP | Tank warranty |
|---|---|---|---|---|---|
| Neopower Black Shield Locally made | 320L | NA45‑320B | R290 | 5.4 | 7 years |
| Emerald Select | 270L | HPA1‑S270 | R290 | 4.41 | 5 years |
| Emerald Select | 320L | HPA1‑S320 | R290 | ~4.4* | 5 years |
| Emerald Pro (with E‑Heater) | 270L | EE‑HWS‑A1‑270E | R290 | ~4.5* | 7 years |
| Emerald Pro (with E‑Heater) | 320L | EE‑HWS‑A1‑320E | R290 | ~4.5* | 7 years |
| iStore | 270L | R290‑FL02 | R290 | 4.8 | 5 years (parts & labour) |
| Powerbay Gen II | 300L | PBG2‑300RE‑HYBRID | R290 | 4.15 | Manufacturer warranty — confirm current term |
| Midea (R290 Smart Saver) | 280L | R290 Smart Saver | R290 | Varies with ambient temp | 7 years |
*Emerald Select 320L and Emerald Pro COP figures are estimated in line with the published Select/Pro range performance, as Emerald has not published a separate figure for every tank size. All other specifications sourced from manufacturer datasheets and product documentation. Confirm exact current specification and warranty terms with your installer before purchase, as brands update models periodically.
Why nearly everyone has moved to R290
Every system on this list — except older superseded Midea models — now runs on R290 (propane), a natural refrigerant with a Global Warming Potential of just 3, compared to 1,430 for older R134a systems. R290 also delivers strong heat-transfer efficiency, which is part of why COP ratings across this generation of heat pumps have climbed into the 4.1–5.4 range.
What you can actually claim: VEU, Solar Victoria & STCs
Three government programs can be stacked on a single heat pump hot water installation in Victoria:
| Program | Administered by | Amount | Key requirement |
|---|---|---|---|
| Solar Victoria Hot Water Rebate | Solar Victoria (State) | Up to $1,000 (up to $1,400 for locally made products) | Owner-occupier; combined income under $150,000/yr; pre-approval required |
| Victorian Energy Upgrades (VEU) | Essential Services Commission | ~$560–$910 indicative, varies with VEEC market | Property 2+ years old; replacing inefficient system; min. $200 customer contribution |
| Federal STCs | Clean Energy Regulator | ~$300–$600 depending on system and zone | CEC-approved product; applied by installer at point of sale |
Stacked together, this can bring the combined saving up to roughly $2,030 for a locally made product, or up to around $1,630 for other eligible products, before the additional STC value is applied.
Only one of these brands is currently on the locally made list
Of the eight systems compared here, Neopower is the only brand currently on Solar Victoria’s locally made incentive list — the list that unlocks the higher $1,400 rebate tier rather than the standard $1,000. That doesn’t make the other systems ineligible for rebates; it simply means they currently sit in the standard tier. Brand eligibility on the locally made list is reviewed and updated periodically, so it’s worth confirming current status at the time you install.
Matching system size to your household
- 2–4 people: a 220–270L system (Emerald Select 270L, iStore 270L, Emerald Pro 270L) is typically sufficient.
- 4–6 people: a 300–320L system (Neopower 320L, Emerald 320L range, Powerbay 300L, Midea 280L) gives more headroom for back-to-back showers and peak demand.
- All-in-one vs split: every system compared here is an all-in-one design (tank and compressor combined), which is generally simpler and cheaper to install than a split system with a separate outdoor unit.
Frequently Asked Questions
Which heat pump hot water brand is eligible for the higher $1,400 Solar Victoria rebate?
Of the systems compared here, Neopower is currently on Solar Victoria’s locally made incentive list, qualifying eligible households for up to $1,400 rather than the standard $1,000. This list is updated periodically, so confirm current status before installing.
How much can I save by stacking VEU, Solar Victoria and STC rebates?
Combining all three can reduce the upfront cost by up to roughly $2,030 for a locally made product, or up to around $1,630 for other eligible products, plus the additional STC value on top.
What size heat pump hot water system do I need?
As a general guide, 220–270L systems suit two to four people, while 300–320L systems suit larger households of four to six or more. Your installer should confirm sizing based on your actual usage and number of bathrooms.
This article is general guidance only. Rebate amounts, VEEC/STC market prices and product specifications are indicative and subject to change. Always confirm current eligibility and figures with an accredited provider before proceeding.
Not sure which system is right for your home?
Climate Green is a VEU-accredited provider and Solar Victoria authorised retailer. We’ll confirm your rebate eligibility across all three programs and recommend the right size and brand for your household.
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