Heat pump hot water, with the brands and refrigerants that hold up.

Top heat pump hot water brands in AU 2026

The brand matters less than the refrigerant and the install location. CO2 (R744) handles cold climates best; R290 (propane) is the new mainstream standard with good efficiency in temperate zones. Avoid R134a — being phased out.

• Reclaim Energy

  CO2 (R744) refrigerant, split system

  Highest COP in AU market (5.3), best cold-weather performance

  Best for: Cold-climate homes (alpine VIC, Hobart, Canberra) and homeowners prioritising lifetime efficiency

  Top tier

• Sanden Eco Plus

  CO2 (R744), 10-year tank / 6-year heat pump warranty

  Quietest on market (37 dB), longest warranty

  Best for: Noise-sensitive installs (near bedrooms), long-hold homeowners

  ~$4,500 installed

• iStore

  270 L tank, dedicated solar-boost input

  Most-installed by AU plumbers, best value, solar-boost ready

  Best for: Homeowners with existing solar PV — runs on excess solar when the inverter signals

  Value-to-mid tier

• Stiebel Eltron

  Integrated or split, 100+ years thermal heritage

  German engineering, durability-focused

  Best for: Buyers prioritising long service life over headline COP

  Upper-mid tier

• Rheem AmbiPower

  R290 (propane) refrigerant, 270 L

  Volume mainstream player, COP 4.5–5.2 (280e)

  Best for: Temperate-climate homes (Sydney, Brisbane, Perth) wanting mainstream brand support

  ~$2,899 installed

Typical installed pricing 2026 (4-person household, 270–315 L)

Heat pump rebates work via federal STCs (24–28 STCs for a 250 L unit in Zone 3 = ~$1,000 point-of-sale discount). Victorian homeowners can stack the Solar Homes Hot Water Rebate ($1,000 standard, $1,400 if locally made) plus VEU (Victorian Energy Upgrades) for a combined ~$1,560–$1,960 off.

• Volume tier (Rheem AmbiPower 270L) — $2,500 – $3,500 (After ~$1,000 federal STC)
  Best mainstream choice for temperate climates. Net $1,500–$2,500.
• Mid tier (iStore 270L, Aquatech) — $3,000 – $4,000 (After ~$1,000 federal STC)
  Better warranties, solar-boost ready. Net $2,000–$3,000.
• Top tier (Sanden Eco Plus 315L, Reclaim) — $4,000 – $5,000 (After ~$1,000 federal STC)
  CO2 refrigerant, top warranties. Net $3,000–$4,000 — less in VIC after Solar Homes stack.

Federal STCs apply nationwide (~$1,000 typical, point-of-sale). Victoria stacks Solar Homes Hot Water Rebate ($1,000, or $1,400 locally made) plus Victorian Energy Upgrades. NSW Peak Demand Reduction Scheme applies to heat pumps but exact 2026 dollar values need installer confirmation. No state rebate currently in QLD, SA, TAS, or WA for hot water heat pumps.

What actually matters

• COP is the efficiency number that matters. Coefficient of Performance = heat output ÷ electrical input. A COP of 4 means 1 kWh of electricity delivers 4 kWh of heat. Excellent: 5.0+ (Reclaim 5.3, Rheem AmbiPower 280e 5.2). Good: 4.0–4.5. Typical: 3.5–4.0. Anything below 3.5 in 2026 is sub-spec.
• Refrigerant choice should match your climate. CO2 (R744) — Sanden, Reclaim. Operates down to −25°C, best for alpine/cold. GWP = 1. R290 (propane) — Rheem, mainstream new units. Down to −7°C, mainstream AU standard. GWP = 3, slightly flammable so install location restrictions apply. R134a — older synthetic, GWP ~1430, being phased out. Avoid.
• In Victoria, apply BEFORE install. The Solar Homes Hot Water Rebate must be applied for before the system is installed. Wrong order = no rebate. This is the single most expensive single mistake on a $4k system — and it’s common.

What goes wrong

• Heat pump hot water is not the same as heat pump space heating (which is the reverse-cycle air-con system). The brands and rebates are different. This page covers hot water only.
• Tank size matters more than installed COP for most households. A 4-person home with a 250 L tank that runs out in the evening is a worse outcome than a 315 L tank with a slightly lower COP.
• The federal STC value for hot water depends on your zone (same zones as solar PV) and the rated annual electricity savings. The $1,000 figure used here is a typical Zone 3 figure — your installer will calculate the exact STC count.

Common questions

Is a heat pump hot water system worth it in Australia 2026?

For most owner-occupied AU homes with existing solar PV, yes. Federal STCs cover ~$1,000 upfront, the system uses 65–75% less power than a resistive element, and any excess solar can heat the water for free during the day. Payback typically 2–4 years vs gas hot water; faster against electric resistive.

CO2 vs R290 refrigerant — which is better?

Depends on climate. CO2 (Sanden, Reclaim) outperforms R290 in cold conditions — Alpine VIC, Hobart, Canberra. R290 (Rheem AmbiPower, Aquatech) is the volume choice for temperate AU climates and is now the mainstream new-install standard. Both are vastly better than older R134a units.

How much do I save vs a gas hot water system?

A 4-person household running gas hot water in 2026 typically spends $700–$1,200/yr on gas for water heating. A heat pump system on the same household uses ~1,500–2,500 kWh/yr of electricity (~$400–$700 at retail rates, less if powered by solar). Net annual saving usually $300–$800. Over 10 years, that pays for the unit twice over.

Can I run a heat pump on excess solar?

Yes — iStore, Aquatech, and several others have a "solar-boost" input that lets your solar inverter signal the heat pump to run when excess solar is available. Effectively free hot water during the day. Requires installer setup with a CT clamp on the switchboard or inverter API integration.

How long do heat pump hot water systems last?

Tanks typically last 10–15 years (Sanden offers 10-year tank warranty, longest on market). Heat pump compressor 6–10 years depending on brand. The tank is the wear-out component; the compressor can usually be replaced separately at end of life.

Sources

• pumpswap.com.au — Heat pump brand guide
• solar.vic.gov.au — Hot Water Rebate
• cleanenergyregulator.gov.au — STC for hot water
• solarchoice.net.au — Heat pumps compared