2.2kw is roughly an AC 1-1.5 tonnes power depending on make, model and if it is an inverter. You can use that type of wiring for this also. Ensure the following.
Use correct wires all the way to the meter including live, ground and earth. Use good quality socket.
Use correct breaker for the current (power for 240v)
Use an SPD because too many grid tied solars are pushing the voltage too high.
In 3phase use the least voltage phase as all these have slightly different voltage if you have high volts in your area.
For most developed areas apart from cable, breaker and socket everything will work out of the box when using an AC socket already present.
For correct cabling use the following table. Use 7/0.029 only if not shared with anything else and direct from meter.
