• Tesla is offering free Supercharging to buyers of a $100,000 Cybertruck. The incentive is the latest attempt to increase sales, which have stagnated in recent years. The offer, however, has conditions.

Elon Musk and Tesla are hoping the lure of free fuel will lure people back to the Cybertruck.

The automaker is offering free supercharging to some buyers as an incentive. That could save some customers up to $50 per charge.

The offer is available to people who purchase the Foundation Series Cybertrucks — whose prices start at roughly $95,000. You’ll need to have ordered your truck after Feb. 28 and the offer only lasts for your ownership of the vehicle. It cannot be transferred to another Tesla vehicle or another owner.

Also, if you’re planning to use your Cybertruck as a ride-share or delivery vehicle, Tesla will void the offer.

Supercharging rates vary around the country, based on location and time of day (some have peak rates). Prices can range from anywhere from a few dollars to close to $50. Tesla says people who receive this promotion are still responsible for Supercharger fees, like idle and congestion fees, when applicable.

Free Supercharging is the latest attempt by the company to goose sales, which have been stagnating lately. Discounts on new and used vehicles were offered earlier this year and leasing prices have also been cut.

Tesla reportedly sold 38,965 Cybertrucks last year, well below the 48,500 analysts expected the company would sell.

Beyond its divisive appearance, the Cybertruck has suffered as Tesla CEO Elon Musk has assumed a very prominent position in the Trump administration. That has brought about a backlash which has affected not only sales, but the company’s stock. Tesla shares are down 28% year to date and down 43% from their Dec. 17 high.  

This story was originally featured on Fortune.com