We’ve heard about range-extending trailers which could allow EVs to become range-extended plug-in hybrids, but how about this: a trailer with its own battery storage, regenerative braking and even electric-drive assist. That’s the idea behind German camper trailer firm Knaus Tabbert’s concept, on display this summer at Düsseldorf’s Caravan Salon. And besides adding hybrid capabilities to the car that happens to be towing the trailer, the trailer itself can use the energy gained through regenerative braking for its climate control, refrigerator, lights and more. Autobild reports:
Here’s how it works: Two AC generators, each with 850 watts of power are connected to each wheel of the caravan. The energy generated during the drive is stored in lead-acid batteries, which add an extra weightof 70 to 80 kilos. Starting at a speed of about ten km/h the generators begin feeding electricity to the batteries, and the maximum charge power is available by about 35 km/h. If the Caravan’s electricity use is limited to seven hours per day (total power 100 watts), campers can take advantage of up to four days of independence from an external power supply.
Even if you don’t understand German, you might enjoy the video above, which demonstrates many of the promised functions of this system. Outside of videos though, the system still is not ripe for public sale, according to its developer. There’s still no word on when it will be ready or how much it will cost, but it’s one of many small ways that hybrid technology is seeping into nearly every form of transportation.