The opportunity
A different kind of Greater Manchester commute
Water buses are not a replacement for buses, trams or trains. They are a complementary mode that may serve selected corridors where waterway geography, journey times and passenger demand make sense.
Potential benefits
- A quieter and calmer passenger experience.
- Productive travel time away from congested roads.
- New connections between waterfront communities, employment areas, visitor destinations and existing public transport.
- Regeneration of underused waterside locations.
- Integration with walking, cycling, tram, rail and bus journeys.
- A regional demonstrator for modular clean-maritime technology.
- Potential deployment of the resulting vessel and energy platform in other UK and international cities.
“The aim is not to put a boat on every canal. It is to identify the corridors where water transport can provide a genuinely useful, enjoyable and commercially sustainable journey.”
Project positioning
Project positioning
A distinct project, with a separate learning pathway
GM WaterLink is a distinct Snowball project rather than an extension of the KIMIA road-vehicle project. It could investigate adapting relevant learning from the modular 48V hot-swap battery programme for marine use through a separate licensing, engineering and validation workstream.
This project does not claim
- That the KIMIA road vehicle and the water bus are the same vehicle platform.
- That existing automotive battery components are automatically suitable for marine certification.
- That a single 48V battery can directly power a full passenger water bus.
- That existing KIMIA partners have committed to the water-bus project.
- That GMCA or TfGM has approved the service.
- That proposed canals and waterways are already suitable for scheduled passenger services.
Snowball Momentum's role
Snowball Momentum is the project-convening and collaboration platform bringing together transport authorities, waterway owners, marine engineers, battery specialists, hydrogen experts, local authorities, investors, researchers and potential operators.
GM WaterLink is a working project name. Nothing on this page implies approval, commissioning or endorsement by GMCA, TfGM, the Bee Network, Manchester City Council, Trafford Council, Salford City Council, Peel, the Canal & River Trust or any other organisation. Routes, partnerships, costs, performance figures and launch dates are proposals subject to feasibility studies, regulatory approval and partner participation.
Proposed first feasibility corridor
Sale - Stretford - Old Trafford - Castlefield
The Bridgewater Canal corridor should be investigated as the first potential demonstrator because it could connect residential communities, employment locations, leisure destinations and central Manchester, and because it is largely constructed on one level.
Concept map
Indicative study locations - not approved terminals
Sale or Waterside
Indicative study location - not an approved terminal- Residents and employment
- Town-centre residential population plus civic, retail and cultural employment.
- Walking and cycling links
- Existing towpath walking and cycling links to Sale town centre.
- Interchange potential
- Metrolink Altrincham line interchange potential.
- Dock or pontoon requirements
- Pontoon feasibility and towpath widening to be assessed.
- Accessibility considerations
- Level boarding and step-free towpath access required.
- Battery exchange infrastructure
- Candidate terminal for battery module exchange and charging cabinets.
- Visitor and leisure demand
- Leisure, evening and Waterside venue demand to be researched.
- Key permissions required
- Bridgewater Canal Company consent, Trafford planning, landowner agreement.
- Technical constraints to study
- Turning space, mooring conflicts and towpath user safety require survey.
Estimated water journey time
To be validated
Target service frequency
To be modelled
Potential daily demand
Research required
Dock feasibility
Partner assessment required
Navigation constraints
Survey required
Long-term vision
A possible Greater Manchester water-mobility network
Corridors below are illustrative study candidates only. Each would require its own feasibility work before any service could be considered.
Locks, water depth, bridge clearance, turning space, navigation restrictions, waterway condition, other boat users, biodiversity and terminal availability may prevent some routes from supporting a frequent commuter service.
Modular battery system
From vehicle battery swapping to modular marine energy
The proposed 48V architecture is a modular building block rather than a claim that an entire passenger vessel would operate from one basic 48V pack. Multiple certified modules could be safely combined through a purpose-designed marine electrical architecture.
Standardised 48V battery modules
A common low-voltage building block designed for repeatable manufacture and handling.
Marine-rated enclosures
Sealed, corrosion-resistant housings suited to a working waterway environment.
Independent monitoring and isolation
Each module monitored and individually isolatable for safety and servicing.
Propulsion-energy banks
Groups of certified modules combined into the vessel's energy system.
Power conversion
Conversion into the propulsion voltage required by the vessel architecture.
Electric propulsion motors
Quiet rear or underfloor drive suited to low-wash canal operation.
Dockside exchange and charging
Terminal-side exchange, charging and diagnostic stations.
Battery software
Health, usage and traceability data across the module fleet.
Potential benefits
- Lower-voltage serviceable modules.
- Easier removal and replacement than a single large fixed battery.
- Charging batteries away from the vessel.
- Reduced vessel downtime.
- Battery health monitoring.
- Replacement of individual modules rather than an entire propulsion pack.
- Potential reuse across vehicles, boats and stationary energy systems where certification permits.
- Reduced peak grid demand by charging modules intelligently.
- The ability to hold charged reserves at selected terminals.
Still to be proven
No technical specifications have been fixed at this stage.
Energy exchange hubs
The water-bus stop could also become an energy hub
Rapid module exchange
Battery modules are exchanged at selected termini, allowing the vessel to return to service without waiting for a full recharge.
Opportunity charging
The vessel receives a controlled charge while passengers board and disembark.
Overnight charging
Batteries or complete vessels are charged during lower-demand periods, with charged modules prepared for the following day.
Smart-energy dashboard
Illustrative data onlyModules available
Illustrative
Modules charging
Illustrative
State of charge
Illustrative
State of health
Illustrative
Predicted route demand
Illustrative
Electricity cost periods
Illustrative
Renewable energy contribution
Illustrative
Vessel allocation
Illustrative
Maintenance alerts
Illustrative
Hydrogen workstream
Could hydrogen extend the operating range?
Hydrogen is an optional research and development pathway, not a requirement for the first battery-electric demonstrator. The project should independently assess whether a hydrogen fuel cell, hydrogen combustion generator, renewable liquid fuel or additional batteries provide the best range-extension solution.
Battery electric
Best suited to predictable routes where shore charging or battery exchange is available.
Battery plus hydrogen fuel cell
A fuel cell generates electricity to support the batteries and propulsion system on longer routes or during extended operation.
Battery plus hydrogen combustion generator
A hydrogen-fuelled engine drives a generator that supplies electrical energy to the battery or propulsion system.
| Criterion | Battery electric | Battery + fuel cell | Battery + H2 combustion |
|---|---|---|---|
| Energy efficiency | Highest well-to-wake efficiency where shore power is available | Lower than direct battery use due to conversion losses | Lowest of the three configurations |
| Noise | Very quiet | Quiet, with auxiliary system noise | Engine and generator noise requires mitigation |
| Vibration | Minimal | Low | Higher; isolation engineering required |
| Local emissions | None at point of use | Water vapour at point of use | Water vapour plus combustion by-products to be assessed |
| Refuelling infrastructure | Shore charging or module exchange | Hydrogen supply and bunkering required | Hydrogen supply and bunkering required |
| Vessel packaging | Distributed modular mass | Stack, storage and ventilation volume required | Engine, generator and storage volume required |
| Safety engineering | Established marine battery practice, still to be certified for this design | Hydrogen hazard management required | Hydrogen hazard management required |
| Regulatory complexity | Lowest of the three | Risk-based approval with the Maritime and Coastguard Agency | Risk-based approval with the Maritime and Coastguard Agency |
| Technology maturity | Most mature for inland passenger vessels | Emerging in marine applications | Early stage in marine applications |
| Maintenance | Module-level replacement | Specialist stack servicing | Conventional engine plus hydrogen-specific servicing |
| Capital cost | Lowest for a first demonstrator | Higher; to be quantified | Higher; to be quantified |
| Potential route suitability | Predictable corridors with terminal energy access | Longer or more demanding routes | Longer routes where fuel-cell supply is unavailable |
Recommendation
“The first demonstrator should remain battery-first. Hydrogen should proceed only where route modelling shows a genuine operational requirement and where safe, low-carbon fuel supply can be secured.”
Any hydrogen installation would require
- Early regulatory engagement
- Hazard and operability studies
- Ventilation and leak detection
- Safe fuel storage
- Emergency procedures
- Specialist crew training
- Approved refuelling arrangements
- Independent marine engineering
- Confirmation of the hydrogen's production method and lifecycle carbon impact
Hydrogen is not automatically zero-carbon.
Passenger experience
Designed to make the journey part of the day
Inside the vessel
Calm commute
A quieter journey that gives passengers time to work, read or decompress.
Fully accessible
Terminals and vessels designed with disabled passengers from the beginning rather than added later.
Connected journey
Potential integration with contactless ticketing and Greater Manchester's wider public-transport network, subject to agreement.
Useful beyond commuting
Possible event, education, visitor, hospital, university and regeneration services outside peak periods.
Use cases
Where a water bus could earn its place
Light urban logistics
ExploratoryInvestigate whether a separate vessel configuration could move parcels, catering supplies, waste or time-sensitive goods during off-peak periods. Passenger and freight operations would not automatically use the same vessel.
Feasibility gates
Five gates between concept and demonstrator
Statuses are shown as Not started, Researching, Partner needed, Under discussion, Evidence secured or Completed.
Corridor viability
- Waterway ownership
- Navigation rights
- Locks and restrictions
- Water depth
- Bridge clearance
- Speed limits
- Turning and passing space
- Terminal locations
- Ecological impact
- Passenger demand
Vessel architecture
- Capacity
- Accessibility
- Hull design
- Propulsion requirement
- Battery mass
- Stability
- Range
- Charging and swapping
- Crew requirements
- Emergency systems
Regulation and permissions
- Passenger-vessel requirements
- Maritime and inland-waterway regulation
- Waterway-owner approval
- Local planning permission
- Environmental permits
- Insurance
- Hydrogen approvals where relevant
Commercial model
- Capital cost
- Operating cost
- Fare model
- Public subsidy requirement
- Sponsorship
- Concession model
- Operator procurement
- Off-peak revenue
- Fleet utilisation
Demonstrator
- One vessel
- Two or three viable terminals
- Defined operating period
- Real passenger trials
- Energy and reliability monitoring
- Accessibility evaluation
- Public feedback
- Evidence for scale-up
Proposed consortium
The stakeholder ecosystem we need to build
Every organisation below is listed as a potential stakeholder only. No organisation is marked beyond that status unless confirmed project information is entered by an administrator.
Public transport and regional leadership
- Greater Manchester Combined AuthorityPotential stakeholder
- Transport for Greater ManchesterPotential stakeholder
- Relevant local authoritiesPotential stakeholder
- Potential future public-transport operatorPotential stakeholder
Waterway and land interests
- Bridgewater Canal CompanyPotential stakeholder
- Canal & River TrustPotential stakeholder
- Peel PortsPotential stakeholder
- Waterside landownersPotential stakeholder
- Regeneration developersPotential stakeholder
- Terminal-location ownersPotential stakeholder
Marine delivery
- Naval architectPotential stakeholder
- UK boatbuilder or shipyardPotential stakeholder
- Passenger-vessel operatorPotential stakeholder
- Marine electrical integratorPotential stakeholder
- Classification and certification expertisePotential stakeholder
- Accessibility specialistPotential stakeholder
- Marine insurerPotential stakeholder
Energy technology
- Modular battery technology partnerPotential stakeholder
- Battery-management specialistPotential stakeholder
- Electric propulsion supplierPotential stakeholder
- Charging-infrastructure companyPotential stakeholder
- Grid and local-energy partnerPotential stakeholder
- Hydrogen fuel-cell specialistPotential stakeholder
- Hydrogen-engine specialistPotential stakeholder
- Safe hydrogen supply and storage partnerPotential stakeholder
Research and evidence
- Hydrodynamics and vessel-design researchersPotential stakeholder
- Transport-modelling specialistsPotential stakeholder
- Battery and power-electronics researchersPotential stakeholder
- Hydrogen safety expertisePotential stakeholder
- Environmental and biodiversity specialistsPotential stakeholder
- Behavioural and passenger-demand researchersPotential stakeholder
- Lifecycle carbon analystsPotential stakeholder
Commercial and community
- Major employersPotential stakeholder
- Waterfront developersPotential stakeholder
- Event venuesPotential stakeholder
- Universities and collegesPotential stakeholder
- Hospitals and public-sector campusesPotential stakeholder
- Cycling and accessibility groupsPotential stakeholder
- Community organisationsPotential stakeholder
- Tourism and visitor-economy partnersPotential stakeholder
- Investors and clean-transport fundsPotential stakeholder
What the project needs now
Help us determine whether this idea can become a real service
Waterway feasibility partner
Assess navigation constraints, ownership, permissions and possible terminal sites.
Marine design lead
Develop the vessel requirements and initial naval architecture.
Battery and propulsion partner
Define a safe modular marine-energy architecture using 48V building blocks.
Passenger-demand partner
Model potential journeys, interchange behaviour, fares and demand.
Regulatory adviser
Develop the certification and approvals roadmap.
Hydrogen engineering partner
Compare fuel-cell and hydrogen-combustion range-extender options.
Local authority or transport sponsor
Help connect the demonstrator to regional transport and regeneration objectives.
Pilot-site partner
Offer a waterside location that could host a study terminal, pontoon or energy hub.