A slew of new companies have emerged in recent years offering fresh takes on RVs, like Lightship , Pebble , and Grounded . Now another startup called Evotrex is coming out of stealth with its own twist: a hybrid RV travel trailer with an integrated gas engine. The new RV will have an onboard battery pack that will power the living quarters and onboard electronics, but the gas engine will recharge that battery pack and extend its range for far longer than a full charge — potentially making