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Colorado Teardrops developing EV-specific teardrop trailer: The Boulder

Trailer-maker Colorado Teardrops is developing an EV adventure camper trailer that can extend the towing range of an EV. The Boulder has a 75 kWh battery pack built into the trailer frame to recharge the EV’s batteries.


The 12-foot teardrop camper model with a queen-sized bed and two bunk beds sleeps 2 adults and two children and starts at $67,000. As a comparison, the company’s conventional Mt. Massive teardrop trailer, also with a queen-sized bed and two bunk beds, starts at $33,100.


EV drivers can recharge their car’s battery pack using the batteries in the Boulder. Drivers can then recharge both the EV and the trailer at a conventional charge point.


Colorad teardrops envisions a line of future EV-specific trailers. The Golden 17-foot EV Trailer would have a 125 kWh pack and sleep up to 4 adults, and provide DC fast charging between the trailer and two vehicle. The Denver 27-foot EV trailer would have a pack capacity of 200 kWh.



I guess just having the extra power to charge the tow vehicle is the compromise on cost. Instead of drive motors and control software to reduce effective trailer load on the BEV to near zero, just include a large battery so you can top off the BEV towing it. And it adds benefit to all towing vehicles as you could run the trailer off grid much longer than traditional 12V FLA batteries.

Still, if I am paying that much extra for a tear drop it is still pain to stop every 100 miles or less to charge for hour or more to go few more miles. Unless the include the "fast charger" hardware this is limited value.


Hitch load sensing with a very small trailer drive motor could enable much better capability such as:
1. En-route power assist using onboard battery.
2. Regenerative braking and charging while slowing and going downhill
3. Smaller onboard battery to lower cost

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