Large motors and lipo batteries can produce higher currents than usual, therefore higher temperatures, that could start to melt the standard PVC wire insulations. In order to protect against this, we need high temperature silicone insulated wire that can take the high currents. Heavy gauge stranding and solid wire have a bulky disadvantage to fine stranded wire which allows for more maneuverability in tight spaces and sharp corners. In addition the tinned copper strands allow for easy solderability to components and other wires.