Rivian towing efficiency

I read the test also, and it affirms the towing results I've seen from tests of various Tesla models- moderate towing cuts an EVs range to somewhere between a half and a third of its solo range. A prospective EV owner who wants to do serious towing should think in terms of KWh per mile, not advertised range. The Rivian towing a modest size load consumed power at about 1 KWh per mile, a huge increase in power consumption compared with its EPA estimated range figures which pencil out to about .43 KWh per mile. Towing a high wall travel trailer I imagine would increase the consumption to 1.25-1.5 KWh per mile, cutting the truck's range to under 100 miles. I look forward to seeing a tow test with something like a high profile bumper pull toy hauler, which would be within the Rivian's tow rating, but takes a lot more power to move it down the highway than a car on a flatbed trailer. The main issue with EVs in a towing application is not performance or power, it's range. It's going to take a battery in the 500 KWh range to enable an EV to tow a significant load long distances between charges.