FREE EV Charging?

I have gotten phone calls and emails from potential guests wanting to plug their cars in while they are here. What did I miss? Is that supposed to be a free perk at all 2-3 star hotels now? I’m not sure how ev charging works but we don’t have one that is a charging station. Letting you just charge your car overnight for a room under 200 a night and the highest charge per kw in the nation doesn’t sound like a good thing for us. Who offers this? Should I put it on the website that we don’t allow ev charging? There isn’t an accessible outlet in the parking area and I’m not about to run hundreds of feet of extension cords either. Trying to meet the 500 character limit so I’m Just looking for some feedback on what the rest of you do when you get a request from a guest to charge their ev for free when they spend the night. Thoughts?