GETI GWH04W 5000W MPPT Solar Inverter for Photovoltaic Water Heating

Product detailed description

GETI GWH04W Solar MPPT Controller for Water Heating (5000 W)

The GETI GWH04W delivers uncompromising 5 kW performance, IP65 durability, and the Smart Life app built right into the base unit. It is the ideal choice for those who want maximum savings without compromising on technology.

Maximize the return on your solar panels and keep your gas or electricity bills to a minimum!

Are you looking for a reliable path to energy self-sufficiency? Photovoltaic water heating is one of the fastest-paying investments in the field of renewable energy. The GETI GWH04W smart solar controller represents cutting-edge technology for eco-friendly heating and DHW heating. It can efficiently process clean energy from photovoltaic panels and direct it straight to the heating element of your existing boiler, storage tank, or PTC element with unmatched efficiency.

This state-of-the-art inverter is designed for professional installers and discerning DIY enthusiasts who demand maximum performance, outstanding safety, and a detailed overview of energy production—all in one place.


Key benefits that will take your energy business to the next level:

- Maximum energy yield thanks to MPPT technology: an advanced algorithm continuously searches for the maximum power point (MPP) of the photovoltaic panels. This achieves a maximum inverter efficiency of up to 99%, ensuring optimal water heating even in low light conditions (e.g., on cloudy days or during the winter months).
- Bypass. Intelligent source switching (PV / AC grid). If there isn’t enough sunlight, the system can automatically switch to a backup power source from the home’s 230V grid. This ensures hot water is available 24 hours a day, 7 days a week.
- Simple operation without complex electronics: converts direct current (DC) from the panels into alternating current (AC) with a square-wave waveform, which is ideal for directly powering standard resistive heating coils.
- Wi-Fi connectivity and the Smart Life app.
- Rugged construction for harsh environments: Thanks to its IP65 rating, the controller is protected against dust and water splashes, ensuring trouble-free operation in utility rooms or basements.
- Wide voltage range (60 V to 450 V DC). Support for open-circuit voltage up to 500 V DC (Voc) gives installers and DIY enthusiasts tremendous flexibility. A series of 6 to 10 standard modern panels can be safely connected to the controller without the risk of winter voltage spikes damaging the controller.
- With a rated power of up to 5,000 W (5 kW), it can safely power modern high-performance water heaters or larger storage tanks. You can connect a more powerful photovoltaic array (up to 5,260 Wp), which means you can heat water much faster and the system has a huge reserve.


Technical parameters:

- Model/order number: GETI GWH04W / 04291233
- Rated power: 5000 W
- Maximum power output of the photovoltaic array: 5260 W Max.
- 500 V DC
- MPPT operating voltage range: 60–450 V DC
- Solar water heater startup voltage: 120 V DC
- Maximum PV input current: 36 A
- Number of MPPT strings: 1
- Output waveform: Square wave
- Rated output voltage: 230 V AC (dynamically adjusts to PV panels)
- Maximum efficiency of the converter (DC/AC): 99%
- Acceptable AC input range (mains): 90–280 VAC
- User interface: backlit LCD display + control buttons
- Connectivity: Wi-Fi (2.4 GHz band)
- Operating ambient temperature: -30 °C to +60 °C
- Degree of protection: IP65
- Dimensions: (L × W × H) 308 × 188 × 100 mm
- Net weight: 3.4 kg


Important instructions for installation and proper operation:

- Load type (key to functionality): The controller is designed exclusively for purely resistive loads. It works excellently with standard boiler heating coils, heating rods, PTC elements, or radiant heating elements. The device must not have an inductive or capacitive nature—it is not intended to power motors, circulation pumps, or appliances with their own integrated electronic control unit!
- Heater specifications: The connected power consumption must not exceed 5000 W at 230 V AC, and the heater's internal resistance must not be less than 10.5 ohms.
- Installation instructions: The unit must be installed in a vertical position (perpendicular to the wall) on a non-combustible surface (e.g., concrete, brick) to ensure optimal passive cooling of the heat sink.
- Never enclose the controller in a tight, airtight cabinet.
- Legislation and security.
- The inverter output (L, N) must never be connected to the power grid or grounded (TN-S system).


Contents of the package:

- GETI GWH04W Solar Controller
- External temperature sensor (for accurate monitoring of the water temperature in the boiler)
- Set of screws and wall anchors for wall mounting
- A clear and straightforward user manual in Czech

Invest in a future that pays off. With the GETI GWH04W solar controller, you can convert sunlight into hot water with maximum efficiency, complete safety, and comprehensive statistics right on your smartphone!