Why isn the inverter built into the Power Pak?
There are many types of power models in use throughout the world. The Power Pak stores 12VDC power and that power is then transformed through the use of inverters and converters to power the appliances. For example, if the Power pak is being used in Europe, then a standard AC appliance requires 230VAC/50Hz. The same appliance in America will require 120VAC/60Hz. Inverters should be chosen according to the appliances that they will provide power to. There are many other variables and additional answers can be found here.