EFP (United States) - AllCarIndex

Electric Fuel Propulsion Corporation (EFP) was an American automotive company based in Detroit, Michigan, that operated from approximately 1966 to 1980. The company focused on the development and production of electric vehicles during a time when the automotive industry was beginning to explore alternative fuel sources.

One of EFP's notable early models was the Mars II, introduced in 1966. This electric car was constructed using the chassis of a Renault R10 sedan and featured a lead-cobalt battery system. The Mars II utilized four 30-volt battery packs, which could be recharged up to 200 times. The vehicle also incorporated dynamic braking technology, allowing the batteries to recharge during deceleration and coasting.

In the early 1970s, EFP expanded its offerings by creating electric-powered versions of the AMC Hornet. The company later introduced the Transformer 1 in 1978, a luxury electric car priced at $30,000. This model was based on a General Motors mid-sized sedan and utilized a lead-cobalt battery system paired with a 32-volt DC motor, achieving a top speed of 70 mph (113 km/h). The Transformer 1 included features such as air conditioning and leather seats, catering to a more upscale market. For extended travel, EFP offered a mobile generator that could be towed behind the vehicle to recharge the batteries during breaks.

EFP also proposed a follow-up model, the Transformer II, which was intended to be based on the chassis and body of a Cadillac Seville. However, the company ultimately ceased operations in 1980, marking the end of its contributions to the electric vehicle sector.