in this DIY video im showing how you can clean the GP1 Hybrid Battery cooling fan also known as IPU module fan.as time goes the hybrid battery cooling fan tend to gather dust and debris may lead to faults and the inverter + the 110v battery will start heating up. cleaning the fan and the air ducts will prevent us from expensive replacements to come.having a air compressor will be helpful but if not a blower or even a vacuum with a blower can be used. for tools all you need is the standard wrench set and a "Star" Allan key set. if you are trying this make sure you don't fiddle with anything else on the hybrid battery unit as it may cause problems and also have a risk of electric shock.so please be careful.