A Tesla Semi electric truck traveled over 1,000 miles in a single day in a real-world test for a new independent study.

There have been a lot of doubts about class 8 battery-electric semi-trucks. Many didn’t think that they would ever be able to compete with diesel trucks.

Bill Gates was among those doubters. Gates argued that all-electric semi-trucks like the Tesla Semi would “probably never” work because batteries would be too heavy.

He didn’t see them achieving a range of 500 miles, which is needed for long-haul trucking.

Tesla proved him wrong last year with a 500-mile trip with a load on one charge.

The North American Council for Freight Efficiency (NACFE) has been conducting a study as part of its new Run on Less program to test several electric trucks in real-world conditions and release the data in real time.

There are three new Tesla Semi trucks in the program this year, and we reported on the first data coming earlier this month.、

Michael Lohscheller, Nikola Motor’s new CEO, said just last month after one of its hydrogen fuel cell trucks traveled 900 miles in a day:

I defy anyone to find another zero-emission vehicle truck anywhere that can run up to 900 miles in a day.

Well, I found one. The Tesla Semi.

The data-gathering part of the study has just concluded, and we expect NACFE to release more conclusions from the data soon.