First VASS electric Defender prototype with Tesla Model 3 motor and compact 35 kWh battery pack

EV conversion prototype / final commissioning

First VASS EV Defender Prototype Final Testing and Commissioning

The first VASS EV Defender prototype used a Tesla Model 3 motor in place of the transfer case, a compact 35 kWh battery pack, 7 kW AC charging and 30 kW CCS. The vehicle was completed in early 2022 and remains in use as a practical coastal run-around.

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Vehicle
Classic Land Rover Defender EV prototype
Project
EV conversion prototype / final commissioning

Project introduction

The objective

Finish and prove the first VASS prototype electric Defender so it could be used reliably as a simple summer house run-around, suitable for local journeys and trips to the coast without constant attention.

The brief

As part of the original VASS team, the task was to further test, commission and finish the prototype so the vehicle could operate reliably, charge correctly and behave consistently in normal use.

Engineering challenge

Problem, then system response

01 — Challenge
  • Working within the limits of an early small battery pack
  • Keeping power and CCS charging conservative enough to protect the battery
  • Turning a prototype into a vehicle that did not require constant workshop attention
  • Validating the usability of a compact-range Defender EV concept

System architecture

Systems brought together

  1. 01Tesla Model 3 motor mounted in place of the transfer case
  2. 0235 kWh battery pack
  3. 037 kW AC charger
  4. 0430 kW limited CCS charging
  5. 05High-voltage safety system
  6. 06EV control and commissioning workflow

Engineering & integration

Turning architecture into a vehicle

VASS scope
  • Final EV system testing and commissioning
  • Drivability testing
  • Start-up and shut-down behaviour checks
  • 7 kW AC charging checks
  • 30 kW CCS charging validation
  • Fault finding and reliability improvements
  • General EV system refinement before regular use

Commissioning & result

Development outcome

Outcome

The vehicle was finished in early 2022 and is still being used. It proved that a compact electric Defender could work well for short-range, lifestyle use and provided valuable experience for later, higher-power VASS EV Defender projects.

For similar programmes

This project is a strong example for clients who do not need a large touring battery. A smaller, lighter and simpler EV conversion can make sense when the vehicle is mainly used for short trips, local driving or coastal/summer house use.

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