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| 11kW–120kW DC Inverter Geothermal / Water Source Heat Pump NULITE DC Inverter Geothermal / Water Source Heat Pump is a high-efficiency solution designed for heating, cooling and domestic hot water applications. With a wide capacity range from 11kW to 120kW heating capacity, the series provides flexible solutions for villas, apartments, hotels, commercial buildings and large-scale projects. Powered by full DC inverter technology and Mitsubishi inverter compressor, the system intelligently adjusts output according to actual demand, improving energy efficiency, reducing operating costs and maintaining stable indoor comfort. By utilizing stable underground or water source energy, it delivers reliable performance with excellent seasonal efficiency. Featuring Mitsubishi inverter compressor, Sagimaw 4-way valve, electronic expansion valve and high-efficiency plate heat exchanger, the unit ensures efficient heat transfer, precise refrigerant control and long-term reliability. Supporting heating, cooling and domestic hot water, it can be widely integrated with floor heating, fan coils, radiators and hot water tanks. With Wi-Fi, RS485 and multi-language controller, NULITE R32 Geothermal / Water Source Heat Pump provides smart control, flexible system integration and an energy-saving solution for modern residential and commercial buildings. Key Features - 11kW–120kW Heating Capacity - Full DC Inverter Technology - Mitsubishi Full Inverter Compressor - Heating, Cooling & DHW Function - Stable Ground / Water Source Performance - High Efficiency COP up to 6.03 - Wi-Fi, RS485 & Multi-language Control | |||||||||
NL-G2SII/R32
Nulite New Energy
The NULITE R32 DC Inverter Water Source Heat Pump is a high-efficiency renewable energy solution designed for residential and light commercial buildings, integrating heating, cooling and domestic hot water in one system. Powered by R32 refrigerant and DC inverter technology, it delivers efficient, stable and reliable performance by utilizing the consistent energy available from ground or water sources. Compatible with underfloor heating, fan coils, radiators and DHW tanks, it offers flexible system integration for different building applications. With intelligent control, quiet operation and stable year-round performance, it provides an energy-efficient and practical solution for modern heating and cooling systems.
PV Energy-Saving Operation
Supports optional solar PV power connection, allowing this series to make better use of clean electricity during daily operation. By combining geothermal or water source energy with photovoltaic power, it helps reduce grid dependence, lower operating costs, and create a more sustainable heating and cooling solution.
Ground & Water Source Application
This model is suitable for different geothermal and water source systems, including ground loops, water loops, and open water source applications. It makes full use of stable underground or water energy, delivering efficient performance for residential heating, cooling, and domestic hot water throughout different seasons.
Heating, Cooling & DHW in One
One integrated system can provide space heating, cooling, and domestic hot water, helping simplify system design and reduce the need for separate equipment. It is suitable for villas, apartments, and residential projects that require year-round comfort with reliable hot water and indoor temperature control.
Mitsubishi DC Inverter Technology
Equipped with a Mitsubishi DC inverter compressor, the heat pump adjusts output according to real-time demand. This helps improve energy efficiency, reduce frequent start-stop operation, maintain stable indoor comfort, and support long-term reliable performance under different heating and cooling load conditions.
Smart Control
The unit features a multi-language controller, Wi-Fi control, RS485 communication, and linked switch signal connection for smarter and more flexible system management. Users can easily monitor operating status, adjust settings, and control the system remotely, while RS485 connectivity supports integration with residential and project-based control systems.
Third-party thermostats are supported for heat pump control. Depending on the Nulite controller configuration, third-party thermostats can manage either a single zone or multiple zones, allowing users to easily turn the unit on or off and switch between different operating modes.
This heat pump utilises PV DC direct-drive technology. DC power from the photovoltaic system drives the compressor directly, eliminating the need for inverters or batteries and maximising solar energy utilisation. It achieves up to 90% energy savings in bright daytime conditions. Grid power and PV power transition seamlessly: the system runs on PV power first, and mains power automatically makes up for any PV power shortage.
The NULITE R32 DC Inverter Water Source Heat Pump is designed to meet European market requirements with CE certification and Declaration of Conformity (DOC). It complies with relevant European safety, health and environmental protection standards. Combined with strict quality control, reliable components and stable system design, it provides a safe, efficient and dependable solution for residential and light commercial heating, cooling and domestic hot water applications.
• Compact Integrated Design
Space-saving structure for easier installation and flexible system planning.
• R32 DC Inverter Technology
Adjusts heating and cooling output according to actual demand for stable comfort and improved efficiency.
• Flexible System Compatibility
Works with underfloor heating, fan coils, radiators and domestic hot water systems.
• Intelligent Control
Supports Wi-Fi, RS485 and multi-language control for convenient operation and system management.
Designed around the stable nature of ground and water sources, the NULITE R290 geothermal heat pump operates smoothly without the noise of an outdoor fan. Intelligent inverter control adjusts output precisely to actual demand, reducing frequent starts and unnecessary mechanical stress.
The stable operating environment, durable internal structure and carefully selected core components help reduce wear over time—giving users less noise, fewer maintenance concerns and reliable year-round comfort.
Smarter Heat Transfer, Lower Cooling Temperatures
NULITE Ground Source Heat Pump features two plate heat exchangers working together with a DC inverter compressor to provide active liquid cooling.
The first heat exchanger absorbs heat from the equipment's circulating liquid, cooling it before sending it back to the equipment. The compressor then transfers the collected heat to the second heat exchanger, where it is released into the ground-source loop.
Unlike passive cooling, which relies on natural ground temperatures, active liquid cooling can deliver coolant temperatures lower than the ground-loop temperature, providing more flexible and reliable cooling for connected equipment.
Lower Cooling Temperatures, Greater Flexibility, Reliable Performance
NULITE Active Liquid Cooling Technology uses compressor-driven refrigeration to deliver lower coolant temperatures, even below the ground-loop temperature. It provides flexible cooling solutions for equipment requiring precise temperature control and consistent cooling performance.
1. Lower Coolant Temperatures
Unlike passive cooling, active liquid cooling can reduce coolant temperatures below the ground-loop temperature, meeting equipment demands for lower-temperature cooling.
2. Stable Temperature Control
DC inverter technology adjusts cooling output according to actual demand, helping maintain stable coolant temperatures and reduce unnecessary temperature fluctuations.
3. Reliable Cooling Performance
When natural ground-source cooling cannot provide sufficiently low temperatures, active refrigeration continues to deliver the required cooling effect within the system's operating range.
Designed for flexible connection with floor heating, fan coils, radiators and domestic hot water systems.
Proper installation should include suitable circulation, filtration, expansion and safety components according to the project design. Hydraulic and electrical connections must follow the product manual and local installation standards.
Heating · Cooling · Domestic Hot Water
Residential Houses
Cold Climate Regions
Villas and Large Homes
Small Hotels and Guesthouses
Commercial Buildings
80+ Countries & Regions Worldwide
NULITE Water & Ground Source Heat Pumps have been installed across 80+ countries and regions worldwide, serving a wide range of residential and commercial projects.
Successful installations can be found in markets such as Germany, France, the Netherlands, Poland, Romania, Serbia, Slovakia, Turkey and more.
Real Projects. Proven Performance. Global Experience.
What Installation Options Are Available for the R32 Geothermal & Water Source Heat Pump?
The NULITE R32 Geothermal & Water Source Heat Pump supports four installation configurations: Pool/Lake/River Loop, Vertical Ground Loop, Horizontal Ground Loop, and Open Loop Well System. This flexibility allows customers to choose the most suitable solution based on available land, water resources, site conditions and installation budget.
Which Installation Method Is Best for My Property?
Can I Install a Geothermal Heat Pump If I Have Limited Outdoor Space?
Can I Use a Nearby Lake, River or Groundwater as the Heat Source?
Does the Installation Method Affect the Heat Pump's Efficiency and Operating Costs?
