In 2020, e-ppl, via its Midlands-based e-vo facility, partnered with Volta Trucks to bring the revolutionary Volta Zero prototype to life – an all-electric, 16-tonne vehicle designed for safe, zero-emission urban logistics.
Volta’s ambition was clear: develop a vehicle that eliminated tailpipe emissions and enhanced road safety in city environments. But delivering this vision required more than concept – it needed a collaborative build partner able to engineer, adapt, and deliver from the ground up.
The process began with Volta sharing CAD drawings of its chassis concept. From there, e-ppl’s team started a structured evaluation of the build: assessing the design, estimating costs, identifying technical risks, and mapping out the required tooling and footprint within the e-vo facility.
Specialist torque-controlled tools were procured, and bespoke jigs and fixtures were designed to ensure the chassis remained square throughout the build. The team implemented full process control from the start – mapping build stages, validating materials and part supply, installing visual controls, and applying PPE, safety signage, and audit systems to ensure build discipline.
Charging infrastructure and anti-static floor matting were introduced to support live high-voltage work, alongside clearly defined process flow and quality validation.
What began as a chassis-only brief quickly evolved. Following an early review of Volta’s prototype frame in Coventry, e-ppl was asked to manage the entire vehicle build, from frame to cab, battery pack to box body.
One key challenge was cab integration. The cab and chassis were manufactured separately, so ensuring a precise union was essential. e-ppl designed and built a bespoke jig that aligned and secured the cab during mounting, ensuring a consistent fit and eliminating distortion risks.
The entire process was carefully sequenced. Longitudinal chassis rails were installed first to prevent twist. Batteries were placed between these rails, requiring absolute precision. Then came the cab, refrigeration systems (on some models), and box body – all managed within the e-vo build space.
The build team operated across several disciplines: automotive technicians, mechanical fitters, auto electricians, battery specialists, and HV-qualified live workers. Custom tooling was introduced throughout the build, alongside engineered assembly aids and real-time quality controls.
Live working protocols – underpinned by e-ppl’s own HV safety policy – ensured safety during battery handling and commissioning. e-ppl also developed dedicated build books and process documentation, including deviation logs and lean feedback loops.
The Volta Zero presented several engineering firsts. The central driver position, low step entry, 220° field of vision, and bespoke Meritor eAxle powertrain all required careful integration. Some variants included refrigeration systems or roof-mounted hardware, which had to be incorporated without affecting the structure or performance.
Throughout the build phase, e-ppl maintained close collaboration with Volta engineers. The e-vo facility’s open build environment allowed for real-time engagement enabling on-the-spot process adjustments, design reviews, and immediate engineering feedback.
Across several months, e-ppl completed 26 full vehicle prototypes – each one representing a live test platform for Volta’s launch programme. Vehicles were used in hot and cold weather trials, stakeholder demonstrations, customer events, and product validation exercises.
Each unit underwent a full end-of-line inspection before being released for crash, visibility, and durability testing at MIRA.
This programme was about more than building trucks. It demonstrated how e-ppl delivers:
The Volta Zero project highlights e-ppl’s ability to support emerging OEMs with end-to-end manufacturing support – delivering speed, structure, and specialist knowledge under one roof.
