I have an Enginer (ReGo) 4KW system that I want to sell for parts. Currently not charging . . . was told the battery pack is very good but something wrong with BMS. The system is still in vehicle (St Paul, MN) and I am told will cost around $500 to remove. There are some parts of the system I want to keep intact . . . there is a heating system in the car tied to the AC, so I will need the bumper plugin, plus I want to keep the dash switch for EV mode. Any interest? Offer?