Stiebel Eltron’s SHP-O is an R290 heat pump that can be installed outdoors or indoors, controlled through an app and linked to solar through SG Ready. The older WWK models use R134a.
Key facts
| Feature | Detail |
|---|---|
| Refrigerant | R290 (152 g) in the SHP-O; R134a in the WWK |
| Efficiency | SHP-O COP 4.27 (200 L) and 4.21 (300 L), EN 16147 at 20 °C air |
| Operating range | SHP-O -5 °C to 43 °C; the element takes over in colder weather |
| Noise | 47 dB(A) at 2 m (SHP-O) |
| Tanks | 200 or 300 L (SHP-O); 220 or 302 L (WWK) |
| Install | Outdoors, or indoors with 13 m³ of space |
| Solar | SG Ready, for a compatible solar inverter or energy manager |
| Warranty | SHP-O: cylinder 7 years, sealed system 5 years, with labour |
Models
| Model | Tank | Heat pump | Notes |
|---|---|---|---|
| SHP-O 200 Plus | 200 L | R290; 1.5 kW element | COP 4.27; 98 kg |
| SHP-O 300 Plus | 300 L | R290; 1.5 kW element | COP 4.21; 117 kg |
| SHP-O 201 / 301 Premium | 200 / 300 L | R290 | Adds active defrost |
| WWK 222 H | 220 L | R134a; 1.7 kW element | Seasonal COP 3.94 (zone 2) |
| WWK 302 H | 302 L | R134a; 1.7 kW element | Seasonal COP 3.58 (zone 2) |
Warranty
For the SHP-O, Stiebel Eltron gives 7 years on the cylinder and condenser and 5 years on the sealed refrigeration system (compressor included), with labour, plus 2 years on other components and 1 year on the relief valve. The WWK 222H and 302H have 5 years on the cylinder and condenser and 2 years on the sealed system. Units installed through Solar Victoria’s Solar Homes program from 1 July 2023 have five years on every component.
Support in Australia
Stiebel Eltron Australia handles warranty registration and claims.
Strengths
- Can go indoors (with 13 m³ of space) as well as outside
- Low-GWP R290 in the SHP-O
- App control and SG Ready solar connection
- 7-year cylinder warranty on the SHP-O
Watch for
- Rated to -5 °C before it relies on the element
- The WWK models use R134a and have 2 years on the sealed system
- Its 2026 catalogue and product page differ on some SHP-O figures: check the current data sheet
Our take
If the only good spot is inside, in a garage or laundry, the SHP-O is built for it, and its warranty is solid. In a cold climate, a CO2 system will lean less on its element.
Before you buy
- Check the exact model is on the Clean Energy Regulator’s register, which sets its STCs, and, in Victoria, eligible for the Solar Victoria rebate if you want it.
- Plan where it goes. A heat pump needs airflow and makes some noise, so keep it away from bedroom windows and your neighbours’ fence.
- Ask about your water. Warranties can exclude very hard or salty water, and unfiltered bore or rain water, so check yours is covered.
- Compare quotes from hot water retailers near you, and read heat pump vs solar hot water.
Sources
Specifications and warranties change. We use the manufacturer’s own documents and say when one isn’t published; check the current version with your installer before you sign.