特斯拉解释：商业超充站越忙，每度电成本反而越低

Getting more drivers through a Supercharger naturally means more revenue, but Tesla says there is another financial benefit for businesses operating charging stations – the electricity itself can effectively become cheaper on a per-kWh basis as utilization increases.

The company launched Supercharger for Business in 2025, giving businesses the ability to own and operate Supercharger sites while using Tesla’s charging hardware and software. In April, Tesla went a step further by publishing hardware pricing and a financial calculator designed to give prospective operators a clearer picture of costs and potential returns.

Now the company has published another guide to help educate potential customers, this time taking on one of the more complicated pieces of that calculation – how commercial electricity billing works, with a particular focus on demand charges and how they affect charging economics.

Commercial electricity bills typically include fixed fees, energy supply and delivery charges, taxes and demand charges. Unlike the electricity itself, demand charges are generally based on the site’s highest power draw during the billing period.

That means one period when several vehicles are charging simultaneously can establish a site’s demand charge for the month. Once that peak has been reached, additional charging sessions within the same capacity may have little or no impact on that portion of the bill.

This is where higher utilization becomes particularly valuable. Instead of simply bringing in more charging revenue, additional sessions spread those largely fixed demand charges across more electricity sold. Tesla refers to this as “demand charge dilution,” with the site’s average all-in energy cost per kWh declining as utilization rises.

Tesla’s illustrative curve shows just how significant that effect could be. Moving from one session per stall per day to five could reduce the average energy cost by more than half.

As utilization continues climbing, the savings eventually flatten out as average costs approach the underlying energy charge.

For Supercharger for Business operators, that creates a double benefit from a busy location: more charging sessions generate more revenue, while lowering the average cost of delivering every kWh sold at the same time.

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