This Briefcase-Sized Powertrain Could Turn EVs Into Range-Extenders With Ease

- Horse has introduced an ultra-compact, range-extended powertrain.
- It consists of a 1.5-liter four-cylinder engine, a generator, inverter, and cooling package.
- It’s roughly the size of a very large briefcase and could turn EVs into range-extenders.
Automakers who were singing the praises of electric vehicles have suddenly changed their tune and started belting out Ice Ice Baby. They’re now getting a little help from Horse, which has unveiled a new powertrain that makes it easy to convert fully electric vehicles into range-extended EVs.
Set to debut at the Munich Motor Show, the Horse C15 is billed as an ultra-compact range extender that is “no larger than a briefcase.” In fact, in naturally aspirated guise, it measures 19.7 inches (500 mm) long, 21.7 inches (550 mm) wide, and 10.8 inches (275 mm) deep.
More: This Tiny Engine Turns EVs Into Gas Hybrids
While that’s massive for a briefcase, it’s surprisingly compact for a powertrain that consists of a 1.5-liter four-cylinder engine, a generator, inverter, and cooling package. It can be installed horizontally or vertically, and its small size means it could potentially fit into the ‘frunk’ of EVs.
This is where the genius of the idea lives as the C15 could be used to turn battery electric vehicles into range-extenders. This can be done with “minimal modification” and low costs, potentially saving automakers from an embarrassing EV-only mistake.

Horse says the C15 was designed to meet Euro 7 regulations and produces up to 94 hp (70 kW / 95 PS) in naturally aspirated form, which is designed for B- and C-segment vehicles. For larger models, there’s a turbocharged engine offering up to 161 hp (120 kW / 163 PS).The company also said the engine is capable of running on gasoline, ethanol and methanol flex fuels as well as synthetic fuels.
Horse Powertrain CEO Matias Giannini said, “Range extended EVs are the fastest-growing powertrain category in many global markets. The Horse C15 range-extender solution offers OEMs a straightforward and cost-effective way to tap into this opportunity, and adapt their native BEV platforms into REEVs.”
