The Tesla Semi already has one very large guinea pig for an electric fleet: Walmart. The retail juggernaut has some 6,000 trucks and moves merchandise all over the country and as of last May, it was the world's largest retailer. The company eyeing EVs for logistics sends a pretty clear message about the viability of the tech's commercial applications. And Walmart isn't the only company interested in Tesla's truck. According to Bloomberg, trucking logistics company J.B. Hunt and grocery chain Meijer have also reserved multiple Semis.