B320 Hybrid Retrofit System

Tailpipe emissions from buses cause significant air quality issues and legislation around the world is tightening up, forcing operators to upgrade existing vehicles or buy new. This is often a very expensive proposition – a different solution is needed.

Vantage Power’s hybrid retrofit system replaces all the existing components in the bus engine bay – from the engine and gearbox through to the air compressor and cooling packs – with a brand new Euro VI hybrid system.

Upgrade your bus to get the latest emissions standard, a 40% reduction in fuel consumption, and an all new warrantied driveline.


40% fuel consumption reduction

Regenerative braking, engine speed/torque optimisation and a 75% reduction in idling time contribute to excellent fuel economy.

Euro VI

Each B320 comes installed with a brand new and certified Euro VI engine, guaranteeing best in class emissions and a new manufacturer’s warranty.

Lifetime battery warranty

Vantage Power designs, manufactures and tests its own battery packs, meaning we’re confident standing behind our battery packs for their whole life.

VPVision as standard

VPVision – Vantage Power’s industry-leading telemetry solution – is included as standard with all turnkey products, giving you and your customers unparalleled control and insight.

Zero net costs

The B320 pays for itself and then some. With financing options available retrofitting to hybrid need not cost you anything upfront, and can be fully incorporated into normal operating expenditure.

Improved noise and comfort

On a typical route the B320 System runs in engine-off mode for over 50% of the time, and cuts idling by over 70%. Improve driver and passenger comfort with less noise and vibration.

Retrofit Overview

Find out more about our different technologies

Complete B320 system

A fully integrated series-hybrid system on modular sub-frames

Cooling system

All components are liquid cooled for optimal performance, using an integrated cooling system

Energy Storage System

A lithium-ion battery, with integrated liquid thermal management system, giving peak power of 125kW at an operating voltage of 520-610V


Cummins ISB4.5 Euro VI, Power: 134kW (180bhp), 4 cylinder, 4.5L displacement, permanent magnet generator


Demountable sub-frames facilitating removal of components from vehicle, reversible to fit either side differential inputs, mounts to existing vehicle chassis without modification

Drive Motor

Electric motor integrated with single-stage epicyclic gearbox, giving a peak power of 210kW (283bhp), suitable for vehicles up to 18t GVW

Retrofitting in 3 simple steps

Step 1: Strip out existing powertrain

Either you or VP’s installation partners strip the existing engine, gearbox, cooling packs, ancillaries and axle from your bus. These are parts you can use for spares, saving you money elsewhere in your operations.

Step 2: Installation of hybrid modules

The engine bay is cleaned and a brand new, warrantied, Euro VI hybrid powertrain is installed. Existing vehicle electronics and cabin space remain unaffected.

Step 3: Commissioning and sign off

The bus has a full diagnostics sweep performed on it before being tested and then signed off. Legal paperwork is completed and the bus is then returned.

Customer Test Drive

What’s it like to drive a vehicle powered by the Vantage Power B320 System?

Customer Testimonial

RATPDev London on why they are retrofitting with Vantage Power.

VPVision Telemetry

All our (R)ePower systems come pre-installed with our industry leading telemetry, monitoring, maintenance and spare parts portal.

VPVision is an advanced cloud based telemetry system for buses, trucks and other heavy-duty vehicles to:

  • Reduce component failure and warranty support costs;
  • Improve fleet up-time through predictive analytics;
  • Monitor and ensure compliance.


VPVision has been developed from the ground up for vehicle OEM’s, tier 1 suppliers of major vehicle systems, fleet operators and transit authorities where vehicle up-time and legislation compliance are of paramount importance.

Forget traditional telemetry where reams of data need to be poured over to gain any useful insights.

Choose VPVision to do the work for you.













Get in Touch

Unit 7 Greenford Park, Ockham Drive, Greenford London UB6 0FD

+44 (0)208 8130 850