GETI GWH03W 4000W MPPT solar inverter for PV water heating

The GETI GWH03W 4000W MPPT inverter developed for PV water heating allows the direct use of photovoltaic panel systems to power resistance heating devices such as boilers, heaters, heating mats or heating coils. In addition, the inverter is equipped with an AC input, which allows connecting the inverter to the mains voltage and heating the water even when there is insufficient sunlight for heating.

The inverter is equipped with remote control and supervision via a WiFi network and a clear App., a large clear LED display, a temperature sensor with a length of 3m and independent temperature setting for heating water from both the PV and AC networks. The GETI inverter also has a forced heating function. The function is only available in the App and through it you can activate heating from the network if necessary. The inverter is compatible with most boilers on the market.

Note: The GETI GWH inverter is only 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 mains or earth! The output of the inverter must not be connected to the TN-C system.

The system is simple, it only requires the connection of the appropriate number of photovoltaic panels with a maximum power of 4000 W with an operating voltage of 160 ~ 420V DC, a mains voltage of 230C AC and a connection with a resistive load, e.g. a heating coil, an electric boiler, an electric radiator or underfloor heating and fuses elements.

The direct current generated in the panels, which cannot be fed directly to the heating devices, is converted into alternating current in the inverter, which can be used to power the heating devices.

The maximum power of the system is 4000 W. The inverter has a priority input from the photovoltaic panels, and in the event of a lack of power on these panels, the system is backed up by power from the mains voltage of 230V AC.


Product parameters:

- water heating using a resistive load (heating coil, boiler)
- remote supervision via WiFi network
- remote monitoring
- forced water heating from the network remotely.
- temperature sensor
- independent temperature setting for heating from PV and AC
- automatic switching between networks (PV / network 230V AC)
- working modes: only PV as an island system or automatic mode PV + grid
- quiet operation, which ensures passive cooling
- effective monitoring of the maximum power on the panels using MPPT
- high efficiency > 99%

The GETI GWH03W inverter is equipped with a clear LED display that informs the user about the current and set values:

- indication of water heating from PV panels
- indication of water heating from the 230V AC network
- water temperature (PV, AC) current and set
- PV output
- PV voltage
- traffic indication
- error status indication

Technical parameters:

- 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 entry: PV panels
- backup input: mains 230V AC
- working temperature: -25 °C ~ + 55 °C
- efficiency: > 99%
- length of the 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
- 230V AC output connection: 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: 1 pc

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