EcoFlow PowerGlow Immersion Heater – Immersion Heater Water Heating Element for Solar Storage

EcoFlow PowerGlow Smart Heating Element: Maximum PV self-consumption optimization through intelligent water heating

The EcoFlow PowerGlow smart heating element is the perfect technological bridge for homeowners and energy self-suppliers looking to convert their unused photovoltaic surplus into thermal energy with high efficiency. Instead of feeding valuable solar power into the public grid at low rates, this smart system stores the energy directly as hot water in your existing water heater. Thanks to an outstanding efficiency of over 99% at nominal power and seamless integration into the EcoFlow app, you can control your heat supply in a fully automatic, intelligent, and maximally cost-efficient manner.

Highlights of the EcoFlow PowerGlow 3.5 kW version (1-phase & 3-phase)

• Flexible grid integration: Available as a 1-phase version (EF RD-P1-3K5-S1) for the classic 230 V grid or as a 3-phase version (EF RD-P3-3K5-S1) for symmetrical load distribution.
• Maximum energy utilization: Converts PV surpluses precisely with a heating output of 3,500 watts and operates almost without loss, thanks to an efficiency of >99%.
• Compact dimensions: With a heating element length of 375 mm and a total weight of approx. 2.7 kg, this version can be integrated horizontally into even more compact water tanks with ease.
• Comprehensive thread layout: Equipped with a robust G 1 1/2" standard screw thread for uncomplicated and durable mounting in the tank.
• Galvanic isolation: Offers optimal protection against corrosion and electrical fault currents in the system via integrated galvanic separation.

Highlights of the EcoFlow PowerGlow High-Power versions (6 kW & 9 kW)

• Brute heating power: Offers enormous power reserves of either 6,000 watts (EF RD-P3-6K0-S1) or 9,000 watts (EF RD-P3-9K0-S1) for the rapid heating of large water volumes.
• Three-phase power: Connection is made securely via the 400 V 3N grid, which guarantees stable power consumption for demanding thermal processes.
• Extended immersion depth: Features an optimized heating element length of 550 mm from the seal to ensure uniform and efficient heating of the entire tank core.
• Smart interface variety: Full connectivity thanks to Ethernet RJ45, Wi-Fi, RS485, and Bluetooth for fail-safe communication with inverters and smart home systems.
• Precise temperature monitoring: Includes a 2-meter external temperature sensor for exact recording as well as an integrated safety temperature control with automatic shutdown at 85 °C.

Technical Specifications: EcoFlow PowerGlow Series

Professional advantage: The EcoFlow PowerGlow series is the ultimate tool for solar and heating installers to implement sector coupling without complex system architectures. Thanks to the four integrated communication paths (Ethernet, Wi-Fi, RS485, and Bluetooth) and precise Modbus capability, the smart heating element can be seamlessly integrated into the EcoFlow PowerOcean ecosystem or any third-party inverter. The mechanical G 1 1/2" or G 1 3/4" / G 2 1/4" standard thread with a defined wrench size of 55 mm and a tightening torque of 50 Nm guarantees fast, process-reliable installation. Complete galvanic isolation, a robust mechanical pressure range of up to 10 bar, and double protection via the external sensor and safety temperature limiter (STB) function ensure maximum operational safety for continuous use—a true relief for fast commissioning and minimal maintenance efforts.