Frankly speaking, it is not difficult to install a pre-packaged VFD / VSD Inverter Constant Pressure Booster Pump system. All you need to do is to find the right location (well-drained, enough space, easy to connect with water supply pipeline and electricity), use the right tools (screwdriver, wrench, tape seal, pipe fitting, multimeter…), and connect the pump system with the pipeline and electricity. After installation is done, check the pump to see if it turn on and off according to the water usage and make sure there is no water leakage.
However, it would be much more difficult to install a non-pre-packaged VFD / VSD Inverter Constant Pressure Booster Pump system. You will need to find the right components such as control box, bottom plate, 5-way connector, pressure sensor, pressure tank, pressure gauge, and check valve to equip with the water pump and the VFD / VSD Inverter and then put them all together. It is very time-consuming and need some technical skill to complete assembling a VFD / VSD Inverter Constant Pressure Booster Pump system. Once the assembling is done, then you can do the installation.