What are the 10 things to avoid when selecting a VFD pump inverter?

Do not select the one which is not easy to be assembled with the water pump you choose
Do not select the one which is not easy to be installed with pipeline and electricity supply
Do not select the one with too big size and cannot fit with the space
Do not select the one doesn’t provide real constant water pressure
Do not select the one doesn’t save energy
Do not select the one cannot reduce pump operating noise
Do not select the one cannot enhance pump performance
Do not select the one doesn’t provide enough protection for water pump
Do not select the one doesn’t have clear indication for necessary operation info and status
Do not select the one which is difficult to do the maintenance and service for
Do not select the one which is difficult to set parameters