This 1962 Mercury Comet EV Was Born From a Wrecked Nissan Leaf

A real-world example of low-cost EV conversion, circular economy, and practical electrification

Electric vehicle conversions are often portrayed as expensive passion projects reserved for high-end classics and six-figure budgets. In reality, the rapid growth of the EV market has created an entirely new opportunity: reusing mass-produced electric drivetrain components to electrify older vehicles at a fraction of the cost.

A recent project documented by This Old Jalopy proves exactly that. Using parts salvaged from a wrecked 2014 Nissan Leaf, a non-running 1962 Mercury Comet station wagon was transformed into a fully functional electric vehicle — with a total conversion cost kept below $6,000, excluding the car itself.

The result is not just an interesting DIY build, but a compelling case study in affordability, sustainability, and the growing maturity of EV component ecosystems.

Why EV Conversions Are Becoming More Accessible

Traditional EV conversions typically rely on bespoke motors, custom battery packs, and proprietary control systems. These components are expensive and often over-engineered for everyday driving. At the same time, thousands of early-generation EVs — especially Nissan Leafs — are now reaching the end of their road lives due to accidents or body damage, while their electric drivetrains remain perfectly usable.

This shift has created a secondary market for EV components, enabling builders to reuse:

• Factory-tested electric motors

• Integrated battery packs

• OEM inverters and onboard chargers

• Proven battery management systems (BMS)

Instead of reinventing the wheel, this approach repurposes industrial-scale EV technology in a new context.

The Donor Vehicles: A Classic Wagon and a Wrecked EV

The project began with two unlikely partners:

• A 1962 Mercury Comet station wagon, long abandoned and no longer roadworthy

• A wrecked 2014 Nissan Leaf, purchased for approximately $3,000, with its high-voltage system still intact

The Leaf provided nearly everything required to electrify the Comet, including the motor, inverter, onboard charger, and a 24 kWh lithium-ion battery pack.

To bridge the communication gap between Nissan’s OEM systems and the custom vehicle layout, a Resolve EV controller was used. Costing around $900, it allowed the Leaf’s factory electronics — including the BMS — to operate correctly without extensive reprogramming.

Engineering the Conversion: Practical, Not Experimental

Rather than attempting a complex front-wheel-drive setup, the Leaf’s electric motor was mounted to the rear axle of the Mercury Comet. This required significant fabrication, including:

• A custom De Dion axle design

• Reinforced leaf springs

• Shortened CV shafts adapted from the Leaf

Despite the mechanical work involved, the final installation remains visually understated. From the outside, the vehicle still looks like a classic 1960s station wagon — an intentional design choice.

The original 48-module battery pack was disassembled, and usable modules were repackaged into a custom cradle positioned under the hood, replacing the original internal combustion engine. Some damaged modules were replaced, but the majority were reused successfully.

Troubleshooting: Real-World Lessons From EV Integration

As with many grassroots EV projects, the conversion wasn’t flawless on the first attempt.

Initial issues included:

• No motor rotation due to wiring errors

• A failed onboard charger caused by inverted high-voltage terminals

• Incorrect motor direction due to miswired connections

Each issue was resolved methodically, highlighting an important reality of EV conversions: the technology is mature, but precision matters. Once wiring and pre-charge systems were corrected, the drivetrain operated reliably.

Charging, Range, and Usability

The original fuel filler location now houses a J1772 AC charging port, a subtle but symbolic reminder of the car’s transformation from gasoline to electricity.

Based on controller data, the owner estimates a real-world driving range of up to 78 miles (125 km) on a full charge. That figure is remarkably close to the original EPA-rated range of the 2014 Nissan Leaf, demonstrating that the reused battery system retained strong performance.

For a vehicle never intended to be electric, this represents a highly practical outcome — ideal for daily driving, commuting, or local transport.

Why This Project Matters Beyond One Car

This Mercury Comet conversion is more than a hobbyist success story. It reflects broader trends shaping the future of mobility:

• Circular economy principles, extending the life of EV components

• Lower barriers to electrification, especially for independent builders

• Reduced environmental impact, avoiding new manufacturing emissions

• Proof that EV technology scales down, not just up

As EV adoption continues, the availability of second-life batteries, motors, and power electronics will only increase. Projects like this suggest that electrification does not always require new vehicles — sometimes, it simply requires rethinking what we already have.

A Practical Blueprint for Affordable Electrification

By keeping costs low, documenting mistakes transparently, and using mass-market EV components, this build challenges the assumption that EV conversions must be expensive or impractical.

It also sends a clear message: the electrification of transport is no longer limited to factories and billion-dollar supply chains. With the right knowledge and components, it can happen in garages, workshops, and small communities — one vehicle at a time.

And sometimes, it starts with a wrecked Nissan Leaf and a forgotten station wagon.