Drivers looking forward to the Ram 1500 REV are in for a nice surprise, with the EV truck boasting a massive battery.

The 1500 REV is a big hit for Ram, with first shipment reservations selling out in less than a week. According to Ars Technica, drivers won’t be disappointed with the EV’s range, thanks to an optional 229 kWh battery that provides a 500 mile range. To be clear, that’s an even bigger battery than the one in GM’s Hummer.

The standard Ram 1500 REV will come with a more modest 168 kWh pack, although that will still provide up to a 350 mile range.