Rail Vehicle Dispensation: Great Western Railway Class 230 Fast Charge Unit
The title of this post, is the same as that of this page on the UK Government web site.
The page is an interesting read, but I do feel, that it marks a big step on introducing the Class 230 trains on the Greenford Branch between West Ealing and Greenford stations.
I should say, that I’ve used the Class 230 trains several times and there are trains and platforms with worse passenger access problems on the UK network.
Battery-Powered Train Breaks Distance Record
The title of this post, is the same as that of this article on the BBC.
This is the sub-heading.
A battery-powered train has broken the world record for the longest railway journey on a single charge.
These three introductory paragraphs add more details.
The Great Western Railway (GWR) train – a specially adapted former District Line train – travelled overnight along a 200-mile (322km) route from Reading and back again, via London Paddington and Oxford.
It reached 140 miles (225km), breaking the record on Brunel’s Maidenhead Bridge at about 04:00 BST.
The previous record of 139 miles (224km) was set by German train company Stadler Deutschland in Berlin on 10 December 2021.
This was an impressive demonstration of the capabilities of battery-electric trains.
Will This Record Be Beaten?
200 miles is impressive, but there was also this paragraph in the article.
At the end of the journey GWR said there was a remaining battery charge of 22% which it estimated would have allowed the train to travel about a further 58 miles (93km).
So it looks like 258 miles should be possible.
Four other companies are also developing battery-electric trains.
- Alstom at Derby
- CAF at Newport
- Hitachi at Newton Aycliffe
- Siemens at Goole
- Stadler in Switzerland.
Note.
- All except Stadler have UK factories.
- Siemens and Stadler have delivered trains in Germany.
- This page on the Hitachi Rail web site is entitled Intercity Battery Trains.
- This page on the Hitachi Rail web site is entitled Hitachi Wins New UK Contract To Build Intercity Battery Trains. The customer is Grand Central Trains.
- Hitachi have been running a prototype for some months, in the UK.
The competition is hotting up and the record will certainly be soundly beaten.
GWR Battery-Powered Trains Could Be Used In Future
The title of this post, is the same as that of this article on the BBC.
This is the sub-heading.
Battery-powered trains could be used more frequently after a successful trial by Great Western Railway (GWR).
These three paragraphs give more details.
The rail company says using former underground trains and a rapid-charging system has shown the technology could replace its existing diesel fleet.
The year-long trial was held in west London but the trains will eventually be rolled out in the Thames Valley.
GWR says it can now prove the concept works and hopes to take the initiative to government.
A couple of weeks ago, I used similar trains between Wrexham Central and Shotton stations, which I wrote about in Vivarail Trains And Wrexham Central Station – 6th June 2025.
Changing For Chester At Shotton Station – 6th June 2025
From Wrexham Central station, I took the Borderlands Line to Shotton, where I changed to a train for Chester.
This Google Map shows the station.
Note.
- The station logo in the top-right corner of the map indicates the low-level station on the North Wales Coast Line.
- The second logo at the bootom of the map indicates the high-level station on the Borderlands line.
- It was quite a long walk between the two pairs of platforms.
- There were no lifts or facilities.
The Wikipedia entry for Shotton station gives this summary of future plans.
In March 2015 Network Rail published the draft version of their Welsh Route Study. It contained a proposal to build a new interchange station that would replace the existing High and Low Level stations, allowing for greater connectivity between the North Wales Coast Main Line and the Borderlands Line. The document recommended a transport planning study to establish the cost, feasibility and benefits of the proposed scheme.
In £2.1bn North Wales Rail Overhaul Plans Unveiled, match funding for step-free access at Shotton station is mentioned.
It certainly is a station in need of improvement. Especially, where step-free access is concerned.
It also needs a few more trains, as I waited an hour.
The Bay Platform At Greenford Station
These pictures show Greenford station.
I have some observations to make.
Electrification
Tests for the new battery-electric train would appear to be taking place soon, but there is no electrification or Vivarail/GWR Fast Charge system.
This leads me to the conclusion, that all charging will be done at West Ealing station.
What Length Of Train That Can Be Accommodated In Platform 2 At Greenford Station?
Consider.
- The two-car Class 165 train shown in the pictures is 47 metres long.
- FirstGroup’s test Class 230 train appears from a GWR video, to be three-cars, which would make it 54.663 metres long.
- The test Class 230 train would appear to be nearly eight metres longer, than the current train that works the route.
From the pictures it appears that there is sufficient space in the platform to accommodate the longer train.
Great Western Railway’s Battery Train Sets New Distance Record
The title of this post, is the same as that of this press release from Great Western Railway.
This is the sub-heading.
Great Western Railway’s innovative FastCharge battery trial has achieved another significant step – just days after laying claim to a battery train UK distance record without recharging.
These two paragraphs add more detail.
The train demonstrated its capability on Wednesday by travelling a UK record of 86 miles (138km) on battery power alone and without recharging.
Today the Class 230 battery train completed a 70-mile move from Long Marston to Reading Train Care Depot – using just 45 per cent of its battery capacity. GWR’s team of specialist engineers on board the train claim it could have travelled more than 120 miles on a single charge.
There is also this impressive video.
Note.
- In the video, the train is cruising at 36 mph.
- The top speed of the D78 Stock was 45 mph.
- The train looks in excellent condition.
This is a total game-changer for battery-electric trains in the UK.
The train makers, who have demonstrated battery-electric trains; Alstom/Bombardier, CAF, Hitachi, Siemens and Stadler will have to up their distances on battery power to at least 86 miles and possibly 120 miles, as who would want their new product to be outdistanced by second-hand forty-year-old upcycled London Underground trains?
I have some further thoughts.
The Trains Performance In The Real World
Dr. Simon Green, who is GWR’s Engineering Director, said this.
It’s also worth noting that in reaching the 86 miles on Wednesday, the train was operating in a real-world environment, at speeds of up to 60mph, stopping and starting over a hilly route, with elevation changes of up to 200m.
The train exceeded the 84 miles (135km) recorded by a Stadler Class 777 under test conditions in 2022 – believed to have been the greatest distance travelled by a battery train designed for the UK.
Note that the train was running at up to 60 mph.
Timings For The Mid-Cornwall Metro
This map shows the Mid-Cornwall Metro.
I have been looking at the Mid-Cornwall Metro and this service will share the Cornish Main Line with faster services between Par and Truro.
- Expresses and the Mid-Cornwall Metro will both stop at Par, St. Austell and Truro.
- Par and Truro is a distance of 19 miles.
- Expresses between Penzance and Plymouth take around 22-23 minutes to go between Par and Truro.
- This is an average speed of around 50-52 mph.
It looks to me, that there is scope for the Mid-Cornwall Metro and the express trains to run at similar speeds between Par and Truro.
- If the Mid-Cornwall Metro used Class 230 trains running on batteries, these trains should be fast enough to keep out of the way of the expresses.
- Par station has an island platform, where the Mid-Cornwall Metro uses one side (Platform 3) and expresses use the other (Platform 2).
Perhaps, if the timetable was something like this, it would give the best services to passengers.
- All expresses would use Platform 2, if they were stopping at Par station. The current track layout allows this.
- For Westbound passengers the Mid-Cornwall Metro would stop in Platform 3 and the express would stop in Platform 2, so that passengers going to beyond Truro on the Cornish Main Line could to the express on the other platform.
- Between Par and Truro, the Mid-Cornwall Metro would run a couple of minutes behind the express.
- Passengers for the Falmouth Branch could swap trains at Par on wait for the Metro at St. Austell or Truro.
- For Eastbound passengers, between Par and Truro, the Mid-Cornwall Metro would run a couple of minutes behind the express.
- At Par, the Mid-Cornwall Metro would stop in Platform 3 and the express would stop in Platform 2.
- The express would wait at Par for the Mid-Cornwall Metro.
- Passengers for Plymouth and London Paddington would change trains at Par for the express on the other platform.
- Passengers for the Newquay Branch on the express would swap trains at Par or wait for the Metro at St. Austell or Truro.
I suspect there are other patterns, but something like this will combine express services with the Mid-Cornwall Metro.
Simon’s Vision
Simon Green also says this about his vision of how the trains and the related FastCharge technology could be used.
GWR’s FastCharge technology has been designed to solve the problem of delivering reliable, battery-only trains capable of fulfilling timetable services on branch lines, eliminating the use of diesel traction and helping to meet the Government and wider rail industry’s target to reach net-zero carbon emissions by 2050.
The use of batteries for extended operation has typically been constrained by their range and meant widespread implementation has, until now, not been possible. It also negates the need for overhead electric lines which are expensive, time consuming to install and impact the landscape.
He’s judging the system as a whole, which is the only way to do it.
Where Could Class 230 Trains Be Used On The Great Western Railway?
These are a few ideas.
- Slough and Windsor & Eton Central – 2.8 miles – 3 cars – FastCharge at Slough
- Maidenhead and Marlow – 7.1 miles – 2 or possibly 3 cars – FastCharge at Maidenhead
- Twyford and Henley-on-Thames – 4.6 miles – 3 cars – FastCharge at Twyford
- Reading and Basingstoke – 15.4 miles – 3 cars – FastCharge at Basingstoke
- Weston-super-Mare and Severn Beach – 32.5 miles – 3 cars – FastCharge at Severn Beach
- Bristol Temple Meads to Avonmouth 8.9 miles – 2 cars – FastCharge at Avonmouth
Bourne End station, where there is a reverse may restrict the length of the service to Marlow.
Decarbonising The Mid-Cornwall Metro
Although the Mid-Cornwall Metro will probably run initially using what diesel multiple units, after a year or so, the route will be converted to zero-carbon operation.
Newquay To Falmouth Docks
This map shows the Mid-Cornwall Metro.
These are current timings.
- By train can take almost three hours with changes at Par and Truro.
- By car should take 45 minutes to drive the 24.4 miles according to Google.
Note.
- The train timings are for a typical British Rail-era Diesel Multiple Unit on the branches and something smarter between Truro and Par.
- A Day Return ticket would cost £8.90 without a Railcard.
- If there was a through train, that meant you didn’t have to change trains, I estimate that the time could be as low as one hour and 35 minutes.
I feel that most travellers, who had access to a car, would use that to travel between Newquay and Truro.
Newquay To Falmouth Docks By Electric Train
I have ridden in three battery-electric trains.
- Class 379 train – Manningtree and Harwich in passenger service.
- Class 230 train – Vivarail demonstration
- Class 777 train- Liverpool Central and Headbolt Lane in passenger service.
Note.
- All were mouse-quiet.
- There was no detectable difference, when running on battery power in the trains.
It is my view that battery-electric trains are no second-class solution.
Consider.
- Newquay and Par is 20.8 miles.
- Falmouth Docks and Par is 30.8 miles.
- Newquay and Falmouth Docks is 51.6 miles.
- The maximum speed between Par and Newquay is around 30 mph
- The maximum speed between Par and Falmouth Docks is around 50-70 mph
- There are twelve intermediate stations.
- There is a reverse at Par station.
- Charging would be easy to install at Falmouth Docks, Newquay and Par.
- In Par Station – 10th February 2024, I suggested that Par station could be fully-electrified, so that expresses could have a Splash-and-Dash on their way to London and Penzance. If all platforms at Par were electrified the Mid-Cornwall Metro trains could charge from the electrification, as they reversed.
There are two main ways that the Mid-Cornwall Metro might operate.
- There would be chargers at Newquay and Falmouth Docks and trains would shuttle the 51.6 miles between the two stations.
- There would only be charging at Par and trains would after charging at Par go alternatively to Newquay and Falmouth Docks.
The first might need smaller batteries and the second would only need one charger.
Newquay To Falmouth Docks By Hydrogen-Powered Train
There is only one hydrogen-powered train in service and that is the Alstom Coradia iLint, which is running in Germany.
I feel it is very much an interim design, as Alstom has taken a diesel-mechanical Lint train and swapped the diesel for a hydrogen-powered electricity generator and an electric motor.
But Alstom are putting together a hydrogen-powered train based on an Aventra.
Note.
- The train is three cars.
- I would envisage performance of the hydrogen train would be very similar to that of a similar battery-electric train.
- I wouldn’t be surprised that refuelling of the train would not be a problem, as with all the china clay working nearby, there may well be developments to use hydrogen in the industry to decarbonise the mining.
The Mid-Cornwall Metro and Alstom’s Hydrogen Aventra could be ideal for each other.
Conclusion
I believe, that although the Mid-Cornwall Metro will start operation with diesel multiple units, it will be running in a zero-carbon mode within a few years.
GWR Trialling Transformative Ultra-Rapid Charging Train Battery
The title of this post is the same as that of this article on Rail Technology Magazine.
This is the sub-heading.
Great Western Railway (GWR) has begun trialling a potentially groundbreaking battery innovation called FastCharge. If the trial is successful, it is hoped that the technology could transform branch line services and accelerate the decarbonisation of the network.
This is the first paragraph.
This innovative system, which has been developed over three years, eliminates the need for diesel trains on branch lines by powering battery-operated units with ultra-rapid charging. The system boasts an impressive 2,000kW charging capacity, eight times more powerful than a Tesla Supercharger, allowing trains to fully recharge in just 3.5 minutes at West Ealing station, the trial’s first real-world location.
I took these pictures of the trial installation at West Ealing station, this morning.
Note.
- Platform 5 is used by the trains to and from Greenford station.
- Two sets of charging rails have been installed between the rails, in Platform 5.
- The rails in the charging rails could be aluminium. This would not be surprising, as it is a good electrical conductor.
- The two shorter outside charging rails could be connected together.
- The yellow parts of the charging rails are plastic, so are probably for warning purposes.
- Two white containers have been installed alongside the track.
In Great Western Railway Updates EHRT On Its Upcoming Operational Trial Of Fast Charge Tech, I described the components of the Fast Charge system in this paragraph.
The Fast Charge system consists of three key components: retractable charging shoe gear, which is mounted to the underframe of the train; short (4m) charging rails mounted between the underframe of the train; and the Fast Charge Battery Bank (FCBB) installed beside the track, acting as an energy buffer between the train and the grid.
The charging rails are clearly visible in my images and the Fast Charge Battery Bank is probably in the white containers.
These are my thoughts.
The Engineering Is Of A High Quality
Or it certainly appears so from the platform and in the pictures, that I took.
How Much Energy Will Be Taken On Board at Each Charge At West Ealing?
According to the Rail Technology Magazine article, the Fast Charge Battery Bank will have to supply 2,000 KW for 3.5 minutes to fully-charge the train at West Ealing station.
This is 7,000 KW-minutes or 117 KWh.
In D-Train Order For Marston Vale Confirmed, this is said about the batteries on a Class 230 train.
- The train has four battery rafts, each with a capacity of 106 kWh
- Range is up to fifty miles with a ten minute charge at each end of the journey.
- Range will increase as battery technology improves.
I wonder if the Class 230 train, that will run between West Ealing and Greenford, will only have one 106 kWh battery.
- This will be less weight and therefor better acceleration.
- 117 kWh in the Fast Charge Battery Bank will be sufficient to fully-charge the single battery.
- The route is only five miles for a round trip.
I can see costs dropping.
What Batteries Will Be Used In The Fast Charge Battery Bank?
I think there are four main possibilities.
- New lithium-ion batteries
- Refurbished second-hand electric vehicle batteries
- New lead-acid batteries.
- It might be possible to use supercapacitors
Note.
- Lead-acid batteries can lose charge in cold weather.
- Supercapacitors don’t care about the weather.
- The weight of lead-acid batteries would not be a problem in a stationary application.
If there is only one battery on the train, I can see the supercapacitors handling it.
What Voltage Is Used In The Charging Rails?
Consider.
- The Vivarail Class 230 trains are built from redundant London Underground D78 Stock trains.
- The D78 Stock trains were built to run on London Underground lines, when that had voltages of 0 and 630 VDC.
- So I wouldn’t be surprised if the trains were designed around this voltage.
- If the charging rails worked at 630 VDC, then to have a 2,000kW charger, this would mean a charging current of 3175 Amps.
This would explain the fat cables connecting the charging rails to the Fast Charge Battery Bank.
An alternative voltage to use could be 3,000 VDC, as some trains are built to this voltage and therefor the electronics and transformers must be available. This would reduce the charging current to 667 Amps, which might be able to use smaller cables.
It may come down to what is convenient for the output voltage of the batteries.
Why Are There Two Sets Of Charging Rails?
They are both shown in this image.
Note.
- The two sets of charging rails are about forty metres apart.
- The Fast Charge Battery Banks are another twenty metres further on.
It’s not the layout you’d expect for running a single two-car train running every half hour.
But could it be that two separate sets of charging rails can operate a more frequent service with this layout of charging rails?
Great Western Railway Updates EHRT On Its Upcoming Operational Trial Of Fast Charge Tech
The title of this post, is the same as that of this article on Electric and Hybrid Rail Technology.
This is the sub-heading.
Great Western Railway’s senior program manager, Sonya Johns, speaks to Electric & Hybrid Rail Technology about the firm’s progress on developing ex-Vivarail Fast Charge technology for battery-powered trains, ahead of operational trials due to commence in 2024.
The article is a must-read as it describes the progress since First Group, acquired the assets and intellectual property of Vivarail and its Fast Charge battery train technology.
This paragraph describes the components of the Fast Charge technology.
The Fast Charge system consists of three key components: retractable charging shoe gear, which is mounted to the underframe of the train; short (4m) charging rails mounted between the underframe of the train; and the Fast Charge Battery Bank (FCBB) installed beside the track, acting as an energy buffer between the train and the grid.
This paragraph outlines the benefits of the system.
The Fast Charge system has several benefits, according to Johns, including high charging power, enabling the train to be recharged in around 10 minutes; a standard DNO connection, avoiding costly power supply upgrades; full automation, with no driver interaction required; low safety risk (the charging rails are never live unless fully covered by the train); and minimal disruption during installation, as the FCBB is manufactured offsite and the charging rails are attached to existing sleepers.
This sounds like a system, that has been designed by someone fed up with regulators saying no to innovative ideas.
Other points from the article include.
- The shoe gear has been designed to be easily installed on any rolling stock.
- The one-year trial of the Fast Charge technology and the Class 230 battery train on the West Ealing and Greenford line will commence in spring 2024.
- GWR will capture and analyze data during the trial to understand how the technology performs in different conditions.
The article finishes with this paragraph.
The work, according to GWR, is part of its commitment to reduce the carbon emissions of its train fleet with a view to removing all diesel-only traction from the network by 2040, in line with the Government’s Transport Decarbonisation Plan.
Adrian Shooter would have been pleased if he was here to see it.
New Mobile Rail Charging Facility For Long Marston
The title of this post, is the same as that of this article from Rail Technology Magazine.
This is the sub-heading.
Porterbrook has signed a £1.7 million deal with Siemens Mobility to purchase an innovative Rail Charging Converter (RCC) for its Long Marston Rail Innovation Centre. The cutting-edge technology will make battery charging and 25kV power supply possible in areas of the UK railway where overhead line equipment is not currently available.
This first paragraph describes the system.
The RCC is a modular and containerised system that uses power electronics to provide a fully compliant, standard connection between the modern three-wire electricity grid and the single-wire railway. It essentially reduces the electrification infrastructure needed by being able to plug into existing power cables and deliver the ideal power supply for trains.
These two paragraphs describe how the RCC was designed and funded, and how it will be used in the future.
The original development of the RCC was supported by the Department for Transport through Innovate UK’s First of a Kind programme. The team will install the novel charging solution at Long Marston, enabling the charging of trains with batteries, fed from existing standard local power supply cables.
Compatible with all overhead line equipment powered trains, the small, low-cost design of the RCC enables the removal of diesel passenger train operation on routes without continuous electrification.
I suspect we’ll see other manufacturers like Hitachi ABB Power Grids and Furrer+Frey launch similar products.
This page gives full details of the award to Siemens Mobility.
Project Title: 25kV Battery Train Charging Station Demonstration
Lead Organisation: Siemens Mobility Ltd.
Project Grant: £59,910
Public Description:
The UK rail industry is committed to decarbonisation, including the removal of diesel trains by 2040.
Replacing diesel trains with electric, hydrogen or battery bi-mode rolling stock provides faster, smoother and more reliable journeys, as well as eliminating local pollution and greatly reducing carbon dioxide.
To enable clean, green electric bi-mode operation without continuous electrification requires enhancement of the power supply to existing electrification and novel charging facilities to support bi-mode trains.
No small, low-cost solution is currently available for charging facilities that are compatible with standard UK trains and locally available power supplies and space.
Siemens Mobility, working with ROSCO, TOCs and Network Rail, will deliver a novel AC charging solution enabling simple installation of small, low-cost rapid charging facilities fed from existing standard local power supply cables.
Compatible with all OLE-powered trains, the novel design enables the removal of diesel passenger train operation on non-electrified routes across the UK, while minimising land requirements and modifications required to existing station structures.
£59,910 seems to be good value for the helping with the design of a universal charging system for 25 KVAC battery-electric trains in the UK.
I have a few thoughts.
Will The Rail Charging Converter (RCC) Charge Third Rail Trains?
As new third-rail systems are effectively systems non grata, I suspect that third-rail trains will be charged by fitting a pantograph and the appropriate electrical gubbins.
Most modern third-rail electrical multiple units have a roof that is ready for a pantograph and can be converted into dual-voltage trains.
What Trains Will Be Able To Be Charged Using An RCC?
I suspect it will be any train with a battery, a pantograph and the appropriate electrical gubbins.
Battery-electric trains that could have a pantograph include.
- Alstom Electrostar and Aventra
- CAF Civity
- Hitachi Class 385 train
- Hitachi Class 800 train
- Siemens Desiro and Mireo
- Stadler Class 777 train
- Stadler Flirt and Akku
- Vivarail Class 230 train
I suspect it could charge all trains in the UK, where batteries have been proposed to be added.
What Is Meant By Mobile?
I suspect transportable and temporary would be a better description.
This gallery show Felixstowe station and a Class 755 train, which can be fitted with batteries.
Suppose that testing was to be done at Felixstowe of a battery-electric Class 755 train.
- The containerised electrical system would be placed somewhere convenient.
- A short length of overhead wire would be erected in the platform.
- The system would then be connected together and to the electrical supply.
- After testing, it could be used to charge a train.
It would be very convenient for operation of the railway, if it could be installed and taken out overnight.
Conclusion
It looks a well-designed system.
The Anonymous Widower 