there is a squealing noise coming from my electrical pannel

You are probably better off replacing the fan with the bad bearing. Lube is only a very short term fix. A new fan is only about $20 and will solve the problem for many years!

You will need to start by disassembly of the electrical compartment to the point that you find a converter/charger. It should have a fan on one end, and that needs to go someplace like Radio Shack or Grainger.com to compare your set up with what they have for sale. Pick something the same voltage and nearly the same size.

Good luck!

Fred.