✔ NZ Stocked
🛡 Official Warranty
📞 Need help? 0800 464 664
Reduce your water heating electricity use with the Rheem AmbiPower MDc-180. This heat pump water heater draws warmth from the surrounding air and transfers it into your water, providing an efficient alternative to traditional electric storage water heating without relying on direct sunlight.
178L Storage Up To 4 People Air Source Heating Electric Backup ElementThe MDc-180 is a nominal 180L model with an actual storage capacity of 178 litres.
Allow approximately 3 hours to heat a fully cold tank using the heat pump, based on an air temperature of 19°C and heating water from 15°C to 60°C. This is an estimate calculated from Rheem’s published recovery rate. Colder conditions can increase heating time.
This water heater requires electricity. For an off-grid installation, the power system must accommodate both heat pump operation and the higher demand of the backup element. Discuss suitability with your installer before purchasing.
Have the unit installed by qualified professionals, with the location, airflow, drainage, plumbing and electrical supply assessed before installation.
As a general budgeting guide, allow approximately $2,000–$4,000 for installation. This is an indicative allowance, not a fixed quote. Your local installer can provide an accurate price for your property.
Need Help Choosing? Download Brochure| Model | Rheem AmbiPower MDc-180 — A551180C5 |
| Storage Capacity | 178L (nominal 180L model) |
| Household Size | Up to 4 people, depending on hot water demand |
| Estimated Full Heating Time | Approximately 3 hours at 19°C air temperature, heating water from 15°C to 60°C |
| Heat Pump Recovery Rate | 60L/hour at a 45°C temperature rise and 19°C air temperature |
| Rated Heat Pump Power Input | 683W |
| Backup Element | 2.4kW |
| Recommended Electrical Circuit | 15A |
| Coefficient Of Performance | 4.5 at Rheem’s 19°C test conditions |
| Dimensions | 1810mm high × 532mm wide × 576mm deep |
The MDc-180 is a nominal 180L model with a specified storage capacity of 178 litres.
Allow approximately 3 hours to heat a fully cold tank using the heat pump, based on 19°C air temperature and heating water from 15°C to 60°C.
This is a calculated estimate rather than a guaranteed heating time. Air temperature, humidity, incoming water temperature and hot water drawn during heating will affect the result.
It requires electricity to operate. The heat pump extracts warmth from the surrounding air, so direct sunlight is not required.
It may be suitable where the power system can support its electrical demand. Your installer should assess inverter capacity, battery storage, available generation and the 2.4kW backup element before recommending it for your setup.
Consider how much hot water your household uses, including shower duration, baths and people using hot water close together. Ask your installer to assess capacity against your daily routine.
Allow approximately $2,000–$4,000 as a general budgeting guide. The final cost depends on the work required at your property. Obtain a tailored quote from your local qualified installer.
Rheem’s “up to 70%” claim is based on modelling under specified conditions when replacing a similar-sized electric water heater. Actual savings depend on location, hot water consumption, electricity tariffs and the system being replaced.
Choosing the right water heater depends on household demand, available power and installation requirements. Contact The Off Grid Store if you need help comparing your options.
Contact UsWe get it. You've got a lot of choice when it comes to online retailers.
Here's why we think you should shop with us at The Off Grid Store.
We can deliver to almost anywhere in New Zealand, unfortunately there are a few exceptions such as Chatham Islands and for larger items and Great Barrier Island. Best prices online guaranteed.
30 Day Easy Returns. Not happy with your product, we'll take it back no
questions asked.
Great Service. We pride ourselves on the best service, anywhere.
Your Satisfaction Guaranteed. We handpick our products for quality, we
know you'll love them. But if there is ever something wrong, we'll fix it.
| Rheem | N & S Island | N & S Island Rural |
|---|---|---|
| Rheem Gas 16L LPG Continuous Flow Water Heater | $25.00 | $30.00 |
| Rheem Gas 20L LPG Continuous Flow Water Heater | $25.00 | $30.00 |
| Rheem Gas 26L LPG Continuous Flow Water Heater | $25.00 | $30.00 |
| Rheem Gas 27L LPG Continuous Flow Water Heater | $25.00 | $30.00 |
| Rheem AmbiPower280e Hot Water Heat Pump | From $100 | Call for Quote |
| Rheem AmbiPower MDC-180 Heat Pump 2.4kW | From $100 | Call for Quote |
| Rheem HDC270 Ambiheat Heat Pump Side Vent | From $100 | Call for Quote |
Reduce your water heating electricity use with the Rheem AmbiPower MDc-180. This heat pump water heater draws warmth from the surrounding air and transfers it into your water, providing an efficient alternative to traditional electric storage water heating without relying on direct sunlight.
178L Storage Up To 4 People Air Source Heating Electric Backup ElementThe MDc-180 is a nominal 180L model with an actual storage capacity of 178 litres.
Allow approximately 3 hours to heat a fully cold tank using the heat pump, based on an air temperature of 19°C and heating water from 15°C to 60°C. This is an estimate calculated from Rheem’s published recovery rate. Colder conditions can increase heating time.
This water heater requires electricity. For an off-grid installation, the power system must accommodate both heat pump operation and the higher demand of the backup element. Discuss suitability with your installer before purchasing.
Have the unit installed by qualified professionals, with the location, airflow, drainage, plumbing and electrical supply assessed before installation.
As a general budgeting guide, allow approximately $2,000–$4,000 for installation. This is an indicative allowance, not a fixed quote. Your local installer can provide an accurate price for your property.
Need Help Choosing? Download Brochure| Model | Rheem AmbiPower MDc-180 — A551180C5 |
| Storage Capacity | 178L (nominal 180L model) |
| Household Size | Up to 4 people, depending on hot water demand |
| Estimated Full Heating Time | Approximately 3 hours at 19°C air temperature, heating water from 15°C to 60°C |
| Heat Pump Recovery Rate | 60L/hour at a 45°C temperature rise and 19°C air temperature |
| Rated Heat Pump Power Input | 683W |
| Backup Element | 2.4kW |
| Recommended Electrical Circuit | 15A |
| Coefficient Of Performance | 4.5 at Rheem’s 19°C test conditions |
| Dimensions | 1810mm high × 532mm wide × 576mm deep |
The MDc-180 is a nominal 180L model with a specified storage capacity of 178 litres.
Allow approximately 3 hours to heat a fully cold tank using the heat pump, based on 19°C air temperature and heating water from 15°C to 60°C.
This is a calculated estimate rather than a guaranteed heating time. Air temperature, humidity, incoming water temperature and hot water drawn during heating will affect the result.
It requires electricity to operate. The heat pump extracts warmth from the surrounding air, so direct sunlight is not required.
It may be suitable where the power system can support its electrical demand. Your installer should assess inverter capacity, battery storage, available generation and the 2.4kW backup element before recommending it for your setup.
Consider how much hot water your household uses, including shower duration, baths and people using hot water close together. Ask your installer to assess capacity against your daily routine.
Allow approximately $2,000–$4,000 as a general budgeting guide. The final cost depends on the work required at your property. Obtain a tailored quote from your local qualified installer.
Rheem’s “up to 70%” claim is based on modelling under specified conditions when replacing a similar-sized electric water heater. Actual savings depend on location, hot water consumption, electricity tariffs and the system being replaced.
Choosing the right water heater depends on household demand, available power and installation requirements. Contact The Off Grid Store if you need help comparing your options.
Contact UsWe get it. You've got a lot of choice when it comes to online retailers.
Here's why we think you should shop with us at The Off Grid Store.
We can deliver to almost anywhere in New Zealand, unfortunately there are a few exceptions such as Chatham Islands and for larger items and Great Barrier Island. Best prices online guaranteed.
30 Day Easy Returns. Not happy with your product, we'll take it back no
questions asked.
Great Service. We pride ourselves on the best service, anywhere.
Your Satisfaction Guaranteed. We handpick our products for quality, we
know you'll love them. But if there is ever something wrong, we'll fix it.
| Rheem | N & S Island | N & S Island Rural |
|---|---|---|
| Rheem Gas 16L LPG Continuous Flow Water Heater | $25.00 | $30.00 |
| Rheem Gas 20L LPG Continuous Flow Water Heater | $25.00 | $30.00 |
| Rheem Gas 26L LPG Continuous Flow Water Heater | $25.00 | $30.00 |
| Rheem Gas 27L LPG Continuous Flow Water Heater | $25.00 | $30.00 |
| Rheem AmbiPower280e Hot Water Heat Pump | From $100 | Call for Quote |
| Rheem AmbiPower MDC-180 Heat Pump 2.4kW | From $100 | Call for Quote |
| Rheem HDC270 Ambiheat Heat Pump Side Vent | From $100 | Call for Quote |
