What DTGen does

DTGen (legal entity: Dieselec Thistle Generators Limited) is a UK-based power solutions provider founded in 1974 and rebranded from Dieselec Thistle Generators to DTGen on 1 July 2019. The company sells, installs, commissions, and services standby and prime-rated generator systems — diesel sets from 22kVA to 2,500kVA+ via FG Wilson and Cummins partnerships, industrial gas generators from 200kVA to 500kVA via Pramac, and combined heat and power (CHP) cogeneration plants from 2G Energy and TEDOM (20kW–4,500kW). Its offering has expanded into battery energy storage, solar and battery solutions, hybrid generation, EV charging infrastructure, transitional fuels (HVO), and funded energy solutions. Proprietary technology includes the Connect & Control remote monitoring package built on Deep Sea Electronics (DSE 890) controllers with 4G/GPS connectivity for 24/7 equipment monitoring, fault alerts, and fuel tracking, plus synchronisation and load-sharing capabilities for parallel operation across multiple generator sets.

DTGen generates revenue across five streams: generator hardware sales, project delivery (design, installation, testing, commissioning), a generator hire fleet, managed service and maintenance contracts, and control system upgrades. Pricing is enterprise project-based, with deals ranging from a £250k hire fleet investment to multi-million-pound NHS energy centre projects (e.g., University Hospital of North Tees at £14m). The go-to-market is direct enterprise field sales through three offices — Glasgow (HQ, 80,000 sq ft), Birmingham, and Rugby — with regional sales directors and account managers covering Scotland, the Midlands, and Northern England/Wales. The customer base spans NHS hospitals, data centres (Datavita, University of Glasgow), financial institutions (Barclays), retail distribution (Co-op, Greggs), food manufacturing (McGhee's Bakery), utilities and infrastructure (Network Rail PADS approved), education and research (British Antarctic Survey), and local government.

Since November 2023, DTGen has operated as a subsidiary of Flogas Britain within the DCC Energy group (itself part of Dublin-listed DCC plc). The company holds ISO 9001:2015, ISO 14001:2015, and ISO 45001 certifications, Achilles UVDB pre-qualification, and Network Rail PADS approval, gating access to regulated NHS, utility, and rail tenders. Workforce of 70+ personnel with 800+ years of collective experience, supported by an in-house Training Academy and an apprenticeship programme with West of Scotland College. Over 1,200 generators are on active service contracts across the UK, and the company delivered 190 NHS/health installations worth £22.5m over the preceding ten years.

Name

DTGen

Legal name

Dieselec Thistle Generators Limited

Website

https://dtgen.co.uk

Company type

Private

Founded year

1974

Operating status

Operating

Headcount range

51–100 employees

Short description

DTGen is a UK power solutions provider selling, installing, and servicing diesel and gas generators, CHP systems, and emerging energy technologies for NHS hospitals, data centres, financial institutions, utilities, and industrial customers across Great Britain.

Ownership category

akta.pro rank

Product category

Standby Power Generation Equipment

NAICS

Electric Power Generation (22111), Engine, Turbine, and Power Transmission Equipment Manufacturing (3336), Engine, Turbine, and Power Transmission Equipment Manufacturing (33361)

SIC

Cogeneration Services & Small Power Producers (4991), Motors & Generators (3621), Engines & Turbines (3510)

akta.pro primary industry

Diesel Engine Power Plants (Medium/High-Speed Reciprocating) (EUACACAB)

akta.pro secondary industries

Thermal Power Plant Modernization & Life Extension (Boiler/Turbine/Generator) (EUAEALAA), Thermal Power Plant EPC (Gas/Coal/Oil) (EUAEAAAA)

Keywords

• Standby power generation
• Diesel generator systems
• Combined heat power
• Battery energy storage
• Generator maintenance services

Headquarters

HQ city

Milngavie

HQ country

United Kingdom

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Operations, Technology or R&D, Infrastructure, Marketing or Sales, Supply Chain

Revenue model

1. Generator Sales: DTGen sells diesel and gas generator sets ranging from 200kVA to 2500kVA+ from manufacturers including FG Wilson, Pramac, and 2G Energy. Sales include standard configurations and bespoke solutions for complex installations.
2. Generator Installation Projects: Project delivery including design, supply, installation, testing, and commissioning of generator systems. Projects include complex installations such as rooftop placements, underground basement work, containerized systems, and offshore applications.
3. Generator Hire Fleet: Rental equipment fleet available for customers needing backup power during emergencies, routine maintenance, or new installations. Fleet includes towable 22kVA to 550kVA sets, load cables, auxiliary supply cables, and external bulk fuel tanks.
4. Service, Maintenance and Aftercare: Ongoing servicing, contracts, spare parts, and temporary power services. Aftermarket business aims to double within five years. Includes planned preventative maintenance (PPM) programs, 100% full load testing using mobile artificial load banks, and control system upgrades.
5. Control System Upgrades: Generator life extension through control system refurbishment and upgrade services, replacing obsolete control technology with modern digital systems offering remote monitoring and enhanced functionality.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels10 records

Core offering

DTGen sells and services standby and prime-rated diesel and gas generator sets (22kVA to 2500kVA+) from FG Wilson, Pramac, and 2G Energy, alongside complete project delivery (design, supply, installation, testing, commissioning) for mission-critical facilities. The company also supplies combined heat and power (CHP) cogeneration plants, battery energy storage, solar and battery, hybrid generation, EV charging, and the Connect & Control remote monitoring platform, supported by ongoing service, maintenance, hire fleet, and funded energy solutions.

Product overview

DTGen operates as a diversified power solutions provider offering a portfolio of generator products and energy services. The core offering includes FG Wilson diesel generators (22kVA to 2500kVA+) and Pramac gas generators (200kVA-500kVA), supplemented by 2G Energy CHP systems for combined heat and power applications. These are complemented by new energy solutions including battery energy storage, solar & battery, hybrid generation, and EV charging. Service offerings span the complete lifecycle: generator projects (design/install/commissioning), service & maintenance, the Connect & Control remote monitoring add-on module, generator hire fleet, spare parts, and transitional fuels (HVO). The company is a trading brand of Dieselec Thistle Generators Limited, part of Flogas Britain and DCC company.

Differentiator

Problem solved

Functional benefit

Products and services

• Diesel Generators Standby and prime-rated diesel generator sets covering 22kVA to 2500kVA+ capacities, distributed through FG Wilson and Cummins UK dealership partnerships, used for backup power across healthcare, data centres, infrastructure, and industrial applications.
• Pramac Industrial Gas Generators Industrial gas generators ranging from 200kVA to 500kVA (GGW200, GGW300, GGW400, GGW500) offering alternative fuel options for standby power in healthcare, education, manufacturing, and data centre sectors.
• 2G Energy Combined Heat and Power (CHP) Systems Combined heat and power (CHP) cogeneration plants from 2G Energy (20kW to 2,000kW) that capture and utilize waste heat for simultaneous electricity and heating generation, reducing carbon emissions by up to 30% and saving approximately 20% on energy costs.
• Generator Projects (Design, Installation, Commissioning) Full-service project delivery including design, supply, installation, testing, and commissioning of complex standby power systems for large-scale infrastructure projects including rooftop, underground basement, containerized, and offshore installations.
• Generator Service and Maintenance Comprehensive aftercare services including planned preventative maintenance (PPM), emergency repairs, 100% full load testing using mobile artificial load banks, control system upgrades, and lifecycle support for over 1,200 generators on contract across the UK.
• Generator Hire Fleet Rental equipment fleet including towable 22kVA-550kVA generator sets, load cables, auxiliary supply cables, and external bulk fuel tanks for temporary power during emergencies, routine maintenance, or new installations.
• Battery Energy Storage Systems Battery energy storage solutions for energy storage applications and hybrid generation systems, supporting renewable energy integration and backup power requirements.
• Solar & Battery Solutions Solar photovoltaic systems combined with battery storage for renewable energy generation and backup power capabilities.
• Hybrid Generation Systems Integrated power systems combining multiple energy sources including generators, batteries, and renewables for optimized energy management.
• EV Charging Infrastructure Electric vehicle charging infrastructure solutions as part of the broader energy transition offerings portfolio.
• Spare Parts Supply Genuine OEM spare parts supply and management for generator maintenance and repairs across the installed base.
• Transitional Fuels (HVO) Hydrotreated Vegetable Oil (HVO) fuel solutions as environmentally-friendly alternative to conventional diesel, supporting customers' carbon reduction objectives.
• Funded Energy Solutions Funding solutions to support energy transformation projects and infrastructure investments, enabling customers to adopt cleaner power solutions without upfront capital outlay.

Quantifiable outcome

• CHP can reduce carbon emissions by up to 30% compared to separate conventional generation
• +4 more outcomes

Named customers11 records

Segments7 records

Ideal customer profiles6 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration3 records

Feature4 records

Partnerships

Eleven partnerships are on record, tiered core and minor.

• Network RailcoreStrategic or Co-development Partner · 1 July 2024DTGen achieved Network Rail PADS (Product Acceptance) approval, enabling supply of approved generators for railway infrastructure applications.
• TEDOMcoreStrategic or Co-development Partner · 1 February 2024DTGen partners with TEDOM for Combined Heat and Power Solutions. The partnership showcases installations at UWC Atlantic, demonstrating capability in gas CHP cogeneration for educational facilities. TEDOM is a global manufacturer of gas CHP plants.
• Flogas BritaincoreOthers · 1 November 2023DTGen acquired by Flogas Britain as part of DCC Energy group. Flogas Britain broadens its energy proposition with DTGen acquisition, integrating diesel generator capabilities into the Flogas portfolio.
• Cummins UKcoreChannel Partner/ Reseller/ Distributor · 1 June 2023DTGen secured Cummins UK dealership, enabling supply and support of Cummins-powered generator solutions alongside existing FG Wilson and Pramac partnerships.
• Conrad EnergyminorStrategic or Co-development Partner · 1 November 2021Partnership with Conrad Energy to deliver cleaner, cheaper, secure power solutions.
• Pramac UKcoreChannel Partner/ Reseller/ Distributor · 1 January 2019DTGen launched a range of Pramac industrial gas generators (GGW200, GGW300, GGW400, GGW500) ranging from 200kVA to 500kVA as an alternative fuel choice for standby generators. Pramac UK designated DTGen as a UK power partner for Scotland and the North.
• 2G EnergycoreStrategic or Co-development Partner · 1 August 2018Sales and service partnership with 2G Energy, a German manufacturer of gas CHP cogeneration plant from 20kW to 2,000kW. 2G Energy has more than 5,000 installed gas CHP plants across 43 countries. DTGen leverages its 70+ personnel and established UK market position to supply, service, and support 2G products.
• FG WilsoncoreChannel Partner/ Reseller/ DistributorDTGen is a major distributor of FG Wilson diesel generators from 350kVA to 938kVA+. FG Wilson is a global diesel generator manufacturer. DTGen stocks FG Wilson equipment for quick delivery and offers comprehensive generator range with extensive options.
• DCC EnergycoreOthersDCC Energy is the parent company of DTGen. DCC Energy is a leading multi-energy business operating across Great Britain with brands including Certas Energy and Flogas Britain. Rogerio Lopes appointed as Managing Director for GB in June 2026.
• AchillescoreTechnology or IntegrationDTGen maintains Achilles UVDB certification and passes Achilles construction community audits. Achilles provides supply chain risk and performance management, pre-qualification programmes, and industry audits.
• British MarineminorStrategic or Co-development PartnerDTGen maintains British Marine membership, supporting marine sector power generation solutions.

Scale indicators8 records

Recent moves9 records

Expansion highlights6 records

Broad incumbents

• Aggreko plc: Global temporary and stationary power solutions provider headquartered in the UK; overlapping with DTGen in standby and rental gensets for data centres, events, and utilities, though Aggreko operates at significantly larger scale and broader international footprint.
• Caterpillar Inc. Parent of FG Wilson, DTGen's principal diesel genset OEM partner; competes indirectly through dealer-direct enterprise sales and global Cat dealer network servicing similar data centre and infrastructure customers.
• Cummins Inc. Global manufacturer of diesel and gas generator sets including the recently-added Cummins UK dealership arrangement with DTGen; competes at OEM level across the same standby and prime-rated power segments DTGen addresses in the UK.
• Generac Holdings Inc. Owner of Pramac, whose UK gas generator range DTGen distributes; a much larger industrial and residential power equipment manufacturer that competes across standby and prime-rated genset categories globally.
• Centrica Business Solutions: UK energy services division of Centrica offering CHP, BESS, and distributed energy solutions to commercial and industrial customers; overlaps with DTGen's energy solutions portfolio in CHP and battery storage.

Direct peers

• Power Electrics Generators Ltd: UK-based generator sales, hire, and service specialist with overlapping NHS, data centre, and infrastructure customer base; DTGen actually acquired Power Electrics' sales and projects business in 2022, making the residual hire/service business a direct UK peer.
• Critical Power Supplies Ltd: UK specialist in standby generator supply, installation, and maintenance for commercial, healthcare, and data centre clients; competes head-to-head with DTGen on similar mid-market standby power tenders across the UK.
• SOCIUS Ltd (formerly Sharman Quin): UK standby power solutions provider delivering generator sales, installation, and service to commercial and industrial customers; directly comparable in scale, vertical focus, and product mix to DTGen.

Regional players

• Energyst (Caterpillar dealer network): Caterpillar's European rental power solutions arm delivering temporary and standby generator hire; competes with DTGen's hire fleet business and shares the FG Wilson/CAT product lineage.

Emerging players

• Veolia (Cogenco): Operates the Cogenco CHP service business in the UK which is highly comparable to DTGen's 2G Energy/TEDOM CHP offering; competes for the same hospital, university, and industrial gas CHP installation scope.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/DTGenHQ
• LinkedInlinkedin.com/company/2071810

Compliance6 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles17 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about DTGen