Solar inverter GETI GWH02D 4000W MPPT for PV water heating

Product detailed description

The GETI GWH02D solar inverter is particularly suitable for use in photovoltaic water heating systems using the NZÚ and NZÚ light subsidy programme.

Save costs and heat water with solar energy today. Thanks to the GETI GWH02D solar inverter with automatic grid switching and the possibility to independently set the water temperature for PV or AC heating, you can significantly reduce your hot water heating costs. The NZU Light subsidy will then cover up to 100% of the cost of the installed system.

The GETI GWH02D 4000W MPPT inverter developed for PV water heating allows the direct use of PV panel systems to power resistance heating devices such as boilers, heaters, heating mats or heating coils. The inverter is also equipped with an AC input that allows the inverter to be connected to the mains voltage and heat water even when solar radiation is insufficient for heating.

The inverter is equipped with a clear display, a temperature sensor with a length of 3m and an independent temperature setting for heating water from both PV and AC mains. The GETI inverter is compatible with most boilers on the market.

The GETI solar inverter is equipped with a circuit with switching relays that connect its output either to the inverter circuit or directly to the AC grid, for which it is only pass-through. The Geti inverter is therefore only backed up by the grid (this is called bypass). Since the two power sources are separated in this way, it is not possible for the inverter to cause unauthorized overflows to the grid.

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 inverter output must not be connected to the TN-C system.

The system is simple, requiring only the connection of an appropriate number of photovoltaic panels with a maximum output of 4000 W with an operating voltage of 160 ~ 350V DC, a mains voltage of 230C AC and a connection to a resistive load such as a heating coil, electric boiler, electric radiator or underfloor heating and circuit breakers.

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

The maximum output of the system is 4000 W. The inverter has a priority input from the photovoltaic panels and if this voltage drops below 120V, the water heating will be supplied from the 230V AC mains voltage.


Product parameters:
- solar inverter for hot water heating with resistive load (heating coil, boiler)
- temperature sensor
- separate temperature setting for water heating from PV or AC mains
- automatic switching between networks (PV / 230V AC network)
- operating modes: PV only as an island system or or automatic mode PV + grid
- quiet operation thanks to passive cooling
- efficient monitoring of maximum power on panels using MPPT
- high efficiency > 99%


The GETI GWH02D inverter is equipped with a clear LED display that informs the user of the current and set values:
- indication of water heating from PV panels
- indication of water heating from 230V AC mains
- water temperature (PV,AC) current and set
- PV power
- PV voltage
- comparison indication
- error status indication


Technical parameters:
- input voltage (VDC): 160 to 350 (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.
- type of load:resistive with bimetal thermostat (not suitable for electronically controlled thermostats!)
- the value of the resistive load must not be less than 13 Ohm
- mPPT: YES
- pV panel connection: series or series-parallel
- priority input: PV panels
- backup input: mains 230V AC
- working temperature: -25 °C ~ + 55 °C
- efficiency: > 99%
- length of temperature sensor: 3m
- cooling: passive
- input short circuit protection
- overheating protection
- input connection of PV panels: MC4 connectors
- input connection 230V AC: screw terminal
- output connection 230V AC: screw terminal
- material: aluminium + metal
- degree of protection: IP65
- dimensions l x w x h [mm]: 255 x 201 x 95 mm
- weight: 3 kg

This product requires professional installation.

Package contents: 1pcs GETI GWH02D 4000W solar inverter + 1pcs temperature sensor (3m).