Land Rover Defender
Defender 90 and 110 conversion engineering, from complete vehicle integration to focused support for battery, charging and control systems.
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Specialist vehicle engineering
EV Conversions &
Specialist Vehicle Engineering
VASS engineers complete and part-built EV projects, high-voltage systems, wiring and diagnostics for classic and specialist vehicles.Core expertise
Focused support for the systems that make a specialist vehicle work properly.
From a complete classic conversion to one defined integration or diagnostic package, VASS approaches the vehicle as one connected system.
EV Conversions
Complete and partial conversion support for classics and specialist vehicles.
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High-Voltage EV Systems
Safe, serviceable architecture covering protection, isolation, routing and controls.
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EV Diagnostics & CAN Bus
Structured fault finding across BMS, inverter, charging, controls and communications.
Explore service →Vehicles & project types
Classic platforms. Bespoke engineering.
Established conversion experience alongside project-led support for restoration shops, specialist vehicle builders and private clients.
Classic Mini
Compact EV packaging and whole-vehicle integration developed around the Mini’s size, balance and original character.
Explore Mini conversions →Fiat & SEAT 600
A development platform exploring compact, serviceable electrification for Fiat and SEAT 600 projects—not a finished production kit.
Discuss a 600 project →Bespoke development
Engineering support for unusual vehicles, specialist builders and projects that do not fit an off-the-shelf conversion package.
Explore engineering services →Inside the projects
The engineering, in practice.
Explore the starting point, the work VASS carried out and the outcome recorded for each project.
Full EV conversion / bespoke systems integration
UAE Puma Defender EV with 100 kWh Tesla Battery and Active Cooling
The briefCreate a left-hand-drive electric Defender suitable for UAE conditions, with the performance and usability of a modern EV while retaining the character of the original vehicle. The conversion needed to feel complete rather than like a collection of aftermarket EV parts.
The vehicle became one of the most complete and factory-feeling EV Defender projects VASS worked on. The EV drivetrain, selector, gauges, cabin AC and active battery cooling were developed into a coherent system, then tested in a 50 C heat-soak environment to prove the cooling strategy under difficult static conditions.
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Classic car EV conversion / full restoration support
Tesla Small Drive Unit Classic Mini EV Conversion
The Mini became a very fast and characterful EV restomod. Early testing showed that even a limited power output could overwhelm the original wheels and chassis setup, so the car was progressively upgraded with better brakes, wider tyres, drivetrain improvements and smoother torque delivery. The final setup offered a usable eco mode for normal driving and a stronger sport mode for more aggressive performance.
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Electric aircraft electrical integration / control systems support
Skyfly Electric Aircraft Electrical and Control Integration Support
The aircraft progressed through staged testing, including remote-control operation, tethered hovering and early low-level flight. The work helped prove the electrical and control system integration needed for the aircraft to continue into further development and testing.
Explore projectWhy VASS
Engineering-led support for vehicles that need more than a generic kit.
One practical partner across electrical, mechanical and control-system decisions.
Real EV conversion experience
Decisions grounded in complete vehicles, packaging constraints and road use.
Connected-system knowledge
High voltage, CAN, wiring and mechanical integration considered together.
Support that fits the project
Focused help for workshops and private clients, from one fault to a full build.
Engineering, not kit fitting
Clear problem solving for unusual vehicles, incomplete builds and bespoke requirements.
Clear project communication
Defined scope, honest next steps and practical support throughout the work.
Working with VASS
A clear route from enquiry to engineering.
Share the vehicle, its current build stage and the outcome you need. The initial project review is free; any further diagnostic or engineering work is scoped and agreed before it starts.
Tell us what you have
Describe the vehicle, the work already completed and what you want to achieve. Existing components, photos and documentation help establish the starting point.
Review the next step
The free initial review helps identify the questions to resolve and whether VASS is the right fit. Further investigation may be needed before a specification or quotation can be agreed.
Agree the scope
Define the work, responsibilities and expected outputs. Any further assessment, diagnostic or engineering work is agreed before it begins.
Develop and test
Engineering and testing follow the agreed scope, with the vehicle systems considered together. The project determines the commissioning work and handover information required.
Technical journal
Useful thinking from the workshop.
Classic Car EV Conversion Safety: High Voltage, BMS, Isolation and IVA Considerations
A practical safety guide for owners considering a classic EV conversion, covering high voltage, BMS, isolation, contactors, diagnostics and approval considerations.
Read article →Classic Car EV Conversion Cost UK: What Owners Should Budget For
A practical guide to the real cost drivers behind a UK classic car EV conversion, written for owners who want a reliable, safe and usable result.
Read article →What Goes Wrong in Poorly Built EV Conversions?
A diagnostic-focused article for owners and workshops dealing with unfinished, unreliable or badly integrated EV conversions.
Read article →
Workshop & development support
Engineering support behind your customer project.
VASS works with restoration workshops, restomod builders and specialist vehicle teams that need EV systems expertise without handing over the complete vehicle programme.
- Feasibility, architecture and component review
- Battery, high-voltage, controls and CAN integration
- Diagnostics, commissioning and part-built project recovery
Start a conversation
Ready to discuss your vehicle?
Tell VASS what you are building, which parts are already in place and where the project needs support. We will help define a realistic next step.