Overview

• The C15 packages a 1.5‑litre four‑cylinder, generator, inverter, cooling and exhaust in a unit about 500×550×275mm that Horse says is no larger than a briefcase.
• The base unit is rated around 94–95 bhp, with a turbocharged version targeting roughly 161–163 bhp for larger vehicles and commercial applications.
• Horse says the module can be mounted in a vehicle’s front trunk or rear compartment, either horizontally or vertically, to simplify integration with existing electric drive units.
• The engine is designed to operate only as a generator within its most efficient rev range and is claimed to run on petrol, synthetic fuels, and ethanol or methanol while meeting Euro 7.
• Horse is marketing the system as a cost‑effective path for OEMs to shift BEV platforms to REEVs, with the company suggesting potential battery downsizing though fuel‑tank packaging details remain unspecified.