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| The NULITE 500L R290 DC Inverter Heat Pump Water Heater is a high-efficiency, all-in-one domestic hot water solution designed for residential and commercial applications. Featuring an integrated 500L water tank, the system combines heat pump technology and hot water storage in one compact unit, making it an ideal solution for villas, apartments, hotels, guesthouses and commercial hot water projects. Powered by full DC inverter technology, the system delivers efficient and stable hot water production while intelligently adjusting its operation according to actual hot water demand. Using natural R290 refrigerant, it offers an environmentally friendly solution with a COP of up to 3.2 (at 7°C ambient temperature) and an A+ energy efficiency rating. The unit provides a maximum water outlet temperature of up to 75°C and supports reliable operation across an ambient temperature range of -10°C to 50°C. Built with a high-quality Duplex 2205 stainless steel water tank, the NULITE 500L heat pump offers excellent corrosion resistance, high mechanical strength and long-term durability. Its double-wall plate heat exchanger, DC fan motor and advanced inverter compressor technology contribute to reliable system performance. With a 500L integrated storage capacity, it provides a practical all-in-one solution for applications requiring a large and stable domestic hot water supply. Designed for intelligent operation and flexible system integration, the unit supports Wi-Fi and APP remote control, IoT platform management, Modbus communication and OTA software upgrades. It also features automatic defrost, manual and automatic sterilization functions, SG-ready capability and optional PV-driven operation. For larger hot water demands, up to 8 units can be connected through cascade control, providing scalable system capacities from 500L to 4000L. Combining energy efficiency, integrated tank design, smart control and flexible cascade configuration, the NULITE 500L R290 heat pump water heater is an ideal solution for European distributors, wholesalers and professional installers serving residential and commercial hot water markets. Key Features 500L Integrated Water Tank – All-in-One Design Natural R290 Eco-Friendly Refrigerant Full DC Inverter Technology High COP of 3.2 (at 7°C Ambient Temperature) A+ Energy Efficiency Rating Duplex 2205 Stainless Steel Tank Maximum Water Outlet Temperature Up to 75°C Operating Ambient Temperature Range: -10°C to 50°C Double-Wall Plate Heat Exchanger Wi-Fi, APP, IoT & Modbus Smart Control OTA Remote Software Upgrade Automatic Defrost & Sterilization Functions SG-Ready & Optional PV-Driven Operation Cascade Control: Up to 8 Units, 500–4000L System Capacity | |||||||||
NL-AO500-R290
Nulite New Energy
The NULITE 500L R290 DC Inverter Heat Pump Water Heater is a high-efficiency solution for residential and commercial domestic hot water applications. Featuring natural R290 refrigerant and full DC inverter technology, it delivers reliable and energy-efficient hot water production with a 10kW heating capacity and an A+ energy rating (COP 3.2 at 7°C). Equipped with a premium Duplex 2205 stainless steel water tank, it offers excellent corrosion resistance, no anode requirement and maintenance-free operation. The system features a double-wall plate heat exchanger, providing enhanced safety and reliable heat transfer, with hot water temperatures up to 75°C and stable operation at ambient temperatures as low as -10°C. With a 500L storage capacity and an optional cascade function, it is suitable for applications ranging from private residences and villas to hotels, restaurants, gyms and other commercial facilities. Smart control via WiFi, mobile APP and IoT platforms, together with SG-Ready compatibility, optional PV integration, automatic defrost and manual or automatic sterilization functions, ensures convenient operation, energy efficiency and dependable hot water supply.
1. Eco-Friendly R290 Refrigerant
Powered by natural R290 refrigerant, this heat pump provides an environmentally friendly solution for modern domestic hot water applications. With excellent thermodynamic properties and high energy efficiency potential, R290 helps deliver reliable hot water performance while reducing environmental impact. It is an ideal choice for customers seeking sustainable, energy-efficient and future-ready water heating technology.
2. Premium Duplex 2205 Stainless Steel Tank
Built with a high-quality Duplex 2205 stainless steel water tank, this heat pump offers superior corrosion resistance, excellent mechanical strength and long-term durability. Unlike conventional tanks requiring anodes, the Duplex 2205 design eliminates the need for an anode rod, providing maintenance-free operation and reliable performance even under challenging water conditions.
3. High Efficiency Full DC Inverter Technology
Equipped with advanced full DC inverter technology, this heat pump intelligently adjusts its operating capacity according to hot water demand. With a 10kW heating capacity, an A+ energy efficiency rating and a COP of up to 3.2 at 7°C ambient temperature, it delivers efficient and stable hot water production while helping reduce energy consumption and operating costs.
4. 500L Large Capacity & Cascade Function
Featuring a 500L integrated water storage tank, this heat pump provides a reliable hot water supply for residential and commercial applications. Its cascade function supports multiple-unit operation, allowing the system capacity to be expanded according to actual hot water demand. It is an ideal solution for villas, hotels, restaurants, gyms and other facilities requiring a continuous and dependable hot water supply.
Designed with advanced smart control capabilities, the system supports WiFi, mobile APP and IoT platform management for convenient remote monitoring and operation. With SG-Ready compatibility, optional PV integration and intelligent cascade control, it offers flexible energy management and helps users make better use of available energy resources.
Designed to deliver hot water temperatures of up to 75°C, this heat pump meets diverse domestic hot water requirements. It supports stable operation at ambient temperatures as low as -10°C and features automatic defrosting as well as manual and automatic sterilization functions. Combined with a double-wall plate heat exchanger, it provides reliable performance, enhanced operational safety and dependable hot water comfort throughout the year.
Designed with a robust and durable exterior casing, the unit provides reliable protection for internal components against external impacts and environmental conditions. Its refined structure ensures long-lasting durability while maintaining a clean and modern appearance.
Manufactured with premium Duplex 2205 stainless steel, the inner tank offers excellent corrosion resistance, high mechanical strength and outstanding durability. Its robust construction helps extend service life while ensuring reliable performance under challenging water conditions.
One System. Hot Water for Every Need.
Designed to provide a reliable hot water supply for multiple household applications, the NULITE 500L heat pump delivers comfortable hot water whenever and wherever it is needed. From daily washing and showering to relaxing baths and kitchen use, it offers a versatile hot water solution for modern living.
Application Scenarios
Bathroom Faucets
Rain Showers
Bathtubs
Kitchen Sinks
Washbasins
Multiple Hot Water Outlets
Is the 500L water tank suitable for both residential and commercial applications?
Absolutely. A single 500L unit is ideal for most residential households, providing ample hot water for daily family needs. For commercial applications or larger hot water demands, up to 8 units can be connected through the intelligent cascade function, expanding the total storage capacity to 4,000L. This flexible solution makes it suitable for villas, hotels, restaurants, gyms and other large-scale projects.
How energy-efficient is the heat pump?
Can it operate reliably in cold weather?
How durable is the water tank, and what maintenance does it require?
Can the system be expanded to meet higher hot water demands?
