Sponsor upside
Sell the sponsorship for 3-5x the rental cost
A secure charging station solves a real attendee problem, so it can command more than passive logo placement. Premium events may be able to price the activation even higher based on traffic, placement, and audience value.
Charging station and charging lounge sponsorships already appear in public event sponsorship materials, often priced from several thousand dollars to $15,000+ depending on event size, placement, and sponsor benefits.
Source examples: download the third-party charging sponsorship proof sheet.
A useful attendee service can become sponsor-funded event margin.