GWH03W 4000W MPPT- convert solar energy to electricity used to heat water

In a time of rising energy prices and increasing awareness of climate change, there is an urgent need for innovative solutions that can deliver efficient and sustainable heating. Both private households and commercial enterprises seek technologies that can reduce energy consumption, minimize costs, and have a low environmental impact. The new GETI GWH03W 4000W MPPT inverter is one of the answers to this demand, converting solar energy into electricity used to heat water.

Introduction to the GETI GWH03W Inverter

The GETI GWH03W 4000W MPPT inverter, developed for PV water heating, allows you to use solar panels to power resistive heating devices such as boilers, heaters, heating mats, or heating coils directly. With an AC input, the inverter can also connect to the mains voltage, ensuring water heating even when there is insufficient sunlight.

Advanced Features

The inverter is equipped with remote control and monitoring via a WiFi network in combination with a user-friendly app. It has a large, clear LED display, a temperature sensor with a 3-meter cable, and independent temperature settings for heating water from both solar panels and the grid. The GETI inverter also has a forced heating function, accessible only via the app, allowing you to activate heating from the grid as needed. It is compatible with most boilers on the market.

Installation and Usage

The GETI GWH inverter is suitable for resistive loads with a bimetal thermostat (not suitable for electronically controlled thermostats). The inverter output (L, N) must not be connected to the grid or ground! The output must not be connected to the TN-C system. Examples of resistive heating elements include electric radiators, ovens, water heaters, electric kettles, underfloor heating, fan heaters, tumble dryers, electric fireplaces, and electric grills and stovetops.

In most hot water tanks, there is a resistive heating element (electric heater), which is powered by energy from the sun?s rays. Solar energy is converted into electricity used to heat the hot water.

Simple Installation

The system is simple and requires only the connection of the correct number of solar panels with a maximum power of 4000 W, an operating voltage of 160 ~ 420V DC, a mains voltage of 230V AC, and connection to a resistive load, such as a heating coil, an electric boiler, an electric radiator, or underfloor heating, along with fuse elements. The DC generated in the solar panels is converted into AC in the inverter, which can then be used to power the heating devices.

System Capacity and Efficiency

The system's maximum power is 4000 W. The inverter has a priority input from solar panels, and in the event of insufficient power from these panels, the system is supported by mains voltage of 230V AC. In other words, if there is not enough sunlight, it automatically switches to heating from the grid, ensuring you always have hot water.

Product Parameters

Water heating using a resistive load (heating coil, boiler)

Remote monitoring via WiFi network

Forced water heating from the grid, controlled remotely

Temperature sensor

Independent temperature setting for heating water from solar panels and the grid

Automatic switching between networks (PV / 230V AC grid)

Operating modes: only PV as an island system or automatic mode PV + grid

Quiet operation thanks to passive cooling

Effective monitoring of the maximum power on the panels using MPPT

High efficiency > 99%

Indications on LED display: water heating from PV panels, water heating from 230V AC grid, current and set water temperature (PV, AC), PV output, PV voltage, traffic indication, error status indication

Technical Specifications

Input voltage (VDC): 160 to 420 (VDC)

Input voltage (VAC): 230 V AC

Output voltage (VAC): 0-260 V AC (VAC)

Maximum power: 4000 W

Input current from PV: 20A max.

AC output current: 20A max.

Load type: resistive with bimetal thermostat (not suitable for electronically controlled thermostats!)

The value of the resistive load must not be lower than 13 Ohm

MPPT function: YES

WiFi: YES

Connection of PV panels: Series or series-parallel

Priority input: PV panels

Backup input: mains 230V AC

Operating temperature: -25 °C ~ + 55 °C

Efficiency: > 99%

Length of temperature sensor: 3m

Cooling: passive

Protection against short circuit at the input

Protection against overheating

Input connection of PV panels: MC4 connectors

Input connection 230V AC: screw terminal

Output connection 230V AC: screw terminal

Material: Aluminum + metal

Degree of protection: IP33

Dimensions L x W x H [mm]: 195 x 183 x 100 mm

Weight: 2.35 kg

Packaging and Contents

Packing: 1 pc

Package contents: 1 pc solar inverter GETI GWH03W 4000 W, 1 pc temperature sensor (3m)

Conclusion

If your main goal is efficient and economical water heating with minimal complexity, the GETI GWH03W is an excellent solution. Designed for direct use of solar energy to heat water, it offers several unique advantages.

Direct Water Heating: The GETI GWH03W uses solar energy directly to heat water via resistive loads such as electric heaters and boilers. This eliminates the need to convert and store energy, which can reduce losses and increase efficiency.

Automatic Fallback: The system has an AC input that allows automatic switching to the grid when solar energy is insufficient, ensuring you always have hot water regardless of solar conditions.

Remote Monitoring and Control: With WiFi and an accompanying app, users can monitor and control the system remotely, providing increased flexibility and control.

High Efficiency: With over 99% efficiency and the use of MPPT (Maximum Power Point Tracking) technology, the inverter ensures maximum utilization of solar energy.

Economic and Efficient: No need for expensive battery storage solutions or complex grid connections. Save on electricity and use significantly less power for heating hot water.

Simple Installation: Requires only the connection of solar panels and a resistive load, making installation simple and cost-effective.

Environmentally Friendly: Reduces the need for fossil fuels by using renewable solar energy directly for heating.

Solar panels must be purchased separately. You need to be able to achieve a voltage of 160 ~ 420V DC (this can be done with 4-6 standard panels connected in series), and a max. power of 4000 watts.

Installation of the GETI GWH03W must be carried out by a certified electrician to ensure proper and safe setup.