I have a water pump of 2.2 kW running perfectly with a 3 kW VFD at my mountain house, where the power supply is rated just 3.5 kW max.
If I do not switch on the induction kitchen or the oven, it works without problems.
Here at home my system has 6.5 kW from mains, plus 6 kW from the solar panels, plus other 6 kW from the LG battery. I think that here I could easily run a 5 kW motor driven by a 7.5 kW VFD...
In other countries (France, for example, where there are a lot of super-Phoenix nuclear plants and electricity comes almost for free) the standard home systems are 15 kW.
All these system are indeed 220V single phase, so you need a three-phases VFD for running a 3-phases motor. The nice thing of a VFD is that, if the system has not enough power, you can reduce the power requirement by slowing down slightly the motor. You have full control... If instead you simply buy a new 220V motor single phase (which is also less efficient, as it uses capacitors for creating the additional rotated phase signals) and it draws too much current, you have no way to slow it down for reducing the power requirement.
If I do not switch on the induction kitchen or the oven, it works without problems.
Here at home my system has 6.5 kW from mains, plus 6 kW from the solar panels, plus other 6 kW from the LG battery. I think that here I could easily run a 5 kW motor driven by a 7.5 kW VFD...
In other countries (France, for example, where there are a lot of super-Phoenix nuclear plants and electricity comes almost for free) the standard home systems are 15 kW.
All these system are indeed 220V single phase, so you need a three-phases VFD for running a 3-phases motor. The nice thing of a VFD is that, if the system has not enough power, you can reduce the power requirement by slowing down slightly the motor. You have full control... If instead you simply buy a new 220V motor single phase (which is also less efficient, as it uses capacitors for creating the additional rotated phase signals) and it draws too much current, you have no way to slow it down for reducing the power requirement.