Tenant's friend to install electrical line/car charger

[John Williams]

Hi, I have a trustworthy tenant who is interested in installing a car charger. The unit is in a large, multifamily complex with subterranean parking. The assigned parking spot is nearly 300 feet from the electrical room, so significant conduit/wiring will need to be installed in the garage's ceiling. 

The tenet's friend is an electrical contractor, who will install everything at no cost to the tenant. Seems too good to be true, but again, the tenant is trustworthy. Any ideas on how I can protect myself if something goes wrong? I have scheduled a site walk with the HOA President and contractor. I will require the contractor warranty the work for 1 year, and provide the same documentation that they would provide to a paying customer. Thank you!