4ON 365 Ltd

What 4ON 365 Ltd does

4ON 365 Ltd is a privately held UK critical power and infrastructure specialist founded in 2008 by Lee Gibbins and headquartered in Cheltenham, with additional offices in Leeds and London. The company designs, installs, and maintains critical power systems — including UPS units (10kVA to 10MVA), diesel generators (20kVA to 20MVA), HVAC and cooling, fire suppression, security/access control, and full electrical installations — for enterprise and data centre customers across the UK and selected European markets. Its service portfolio also covers bespoke modular and containerised data centres, containerised UPS/switchgear builds, and specialised builds such as TEMPEST-specification rooms, supported by an in-house 24/7 remote monitoring capability and a proprietary open-source monitoring stack.

A notable differentiator is that 4ON itself operates its own data centre facilities, which it cites as the source of practical, operator-grade expertise that purely engineering-led competitors lack. The company has developed proprietary products including the E-CO2Tainer mobile off-grid EV charging container (combining renewables, bio-diesel, and a 100kVA DC-coupled UPS BESS) and the VFIT variable flow intelligent tile for raised-floor airflow management. Revenue is generated through project-based installation contracts, recurring maintenance agreements at multiple service tiers, equipment sales and hire, and modular/containerised build projects. Customers include SSE, GoDaddy, National Grid, and GTT Communications, and the company holds OEM-grade partnerships with ABB and Schneider Electric plus supply partnerships with Kingspan, Isoclad, and ACT Security Systems.

Name

4ON 365 Ltd

Legal name

4ON 365 Limited

Website

https://4on.co.uk

Company type

Private

Founded year

2008

Operating status

Operating

Headcount range

1–10 employees

Short description

4ON 365 Ltd is a UK-based critical power and data centre infrastructure specialist that designs, installs, and maintains UPS systems, generators, HVAC, modular data centres, and electrical systems for enterprise and data centre customers across the UK and parts of Europe.

Ownership category

akta.pro rank

Product category

Critical Power Infrastructure Services

NAICS

Facilities Support Services (561210)

SIC

Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig Equip (3585), Electric, Gas & Sanitary Services (4900), Services-Facilities Support Management Services (8744)

akta.pro primary industry

Facilities Operations & Maintenance (Power/Cooling/Mechanical) (HDABANAC)

akta.pro secondary industries

HVAC & Industrial Ventilation (Chillers, AHUs, Exhaust, Filtration) (EUAEAFAE), Distribution Network O&M (MV/LV Lines, Switchgear, Transformers) (EUAEAGAE), Building Automation & Controls (BAS/BMS) (HSAPAPAA)

Keywords

• Critical power infrastructure
• UPS systems installation
• Modular data centres
• HVAC services
• Electrical installation services

Headquarters

HQ city

Cheltenham

HQ country

United Kingdom

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Installation Services: Supply, installation and configuration of critical power infrastructure including UPS systems, generators, HVAC, fire suppression, security systems and electrical installations. One-time service revenue from project-based installations.
2. Maintenance Contracts: Ongoing maintenance services for critical power equipment with various levels of cover based on frequency of attendance, parts, labour and incident response times. Regular preventative maintenance visits on quarterly, half yearly or yearly basis.
3. Equipment Sales and Hire: Sale and rental of UPS systems (10kVA to 10MVA), generators (20kVA to 20MVA), HVAC units, and containerised power solutions. Both long and short term hire options available.
4. Modular and Containerised Solutions: Design and build of modular data centres and IT rooms, containerised power and cooling facilities. Complete solutions from initial design through to installation and commissioning.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels4 records

Core offering

4ON 365 Ltd provides end-to-end critical power and HVAC services for UK enterprises, covering the design, installation and maintenance of fixed and containerised generation, UPS, HVAC and cooling systems. The company also designs and builds modular and containerised data centres, IT rooms and server rooms, and supplies related electrical, fire suppression, security and 24/7 remote monitoring solutions. Its named customer base includes SSE, GoDaddy, National Grid and GTT Communications, with projects delivered across the UK and internationally in Sweden, Norway, Belgium, France, Italy and the Netherlands.

Product overview

4ON is a UK-based critical power and data centre solutions provider offering a comprehensive portfolio of products and services for design, build, installation, and maintenance of critical power infrastructure. The core offering includes modular and containerised data centres, UPS systems (10kVA to 10MVA), generators (20kVA to 20MVA), HVAC, fire suppression, security, and electrical systems. Key products include the E-CO2Tainer mobile EV charging solution, VFIT air flow management tiles, and containerised UPS/switchgear builds. The company operates its own data centres and provides 24/7 remote monitoring services, enabling it to offer integrated solutions across the entire critical power lifecycle.

Differentiator

Problem solved

Functional benefit

Products and services

• E-CO2Tainer EV Container Charging Solution Mobile, green, off-grid EV charging container combining renewables and bio-diesel to deliver power to six 22kW EV charge points and two 32a 3-phase sockets, designed for building sites and remote locations without grid infrastructure.
• VFIT (Variable Flow Intelligent Tiles) Intelligent tiles integrated into raised-floor data centres to manage air flow, remove hotspots and improve cooling efficiency of aisle containment systems, configurable to specific environment needs.
• Fresh Air Hybrid Plenum Boxes Enhanced control systems for air handling units that monitor and automatically modulate air mix for optimum energy efficiency while maintaining desired fresh air requirements.
• UPS Enclosures Secure GRP (fibre-glass) enclosures offering complete protection and full environmental control for UPS and battery systems, available in various configurations for temporary or permanent installations.
• Containerised UPS and Switchgear Builds Custom-built containerised UPS or switchgear housings, fully tested and commissioned for tight spaces or external sites, with full functionality and security.
• Containerised Data Centres and Rooms Flexible and rapidly deployable modular data centres housed in refurbished shipping containers or bespoke-built to specification, containing all features of a standard data centre environment.
• Modular Server Rooms Custom-designed and built modular server rooms from 12-rack communications rooms to full-scale 20,000 sq.ft colocation suites, using Isoclad panels and Kingspan raised access flooring.
• TEMPEST Specification Buildings Specially constructed facilities that protect against spurious transmissions and electrical emanations, meeting TEMPEST security specifications for government and defence applications.
• Generator Supply and Installation Diesel-powered backup generators from 20kVA to 20MVA with MTU, Cummins, Perkins and Volvo engines, including LV/MV sets, switchgear and synchronisation services.
• UPS Systems Uninterruptible Power Supply systems from 10kVA to 10MVA for backup power protection, including battery replacement, testing and load bank testing services.
• Data Centre Remote Monitoring 24/7 remote monitoring service using open-source-based tools to track critical power, UPS, generator, fuel levels, faults, efficiency and networking, with automatic engineer deployment when incidents occur.
• HVAC Installation and Maintenance Heating, Ventilation and Air Conditioning systems including DX, chilled water, adiabatic, fresh air hybrid and hot/cold aisle containment, from 5kW to multiple MW capacity.
• Fire Suppression and Detection Waterless fire protection systems including FM200, Novec 1230 and Inergen gas suppression, plus VESDA laser-based smoke detection and optical heat detectors.
• Security, Access Control and CCTV Security systems including ACT-approved access control, CCTV, high-security steel doors, man traps/anti-tailgating and exterior perimeter security solutions.
• Electrical Installation MV/LV distribution, switchgear, transformer installation and maintenance, thermal imaging, power quality monitoring, and periodic electrical testing services.
• Maintenance Contracts (UPS, Generator, HVAC, HV/LV and Data Centre) Recurring preventative maintenance contracts for UPS, generators, HVAC, HV/LV and data centres with tiered levels of cover based on attendance frequency, parts, labour and incident response times (quarterly, half-yearly or yearly visits).

Quantifiable outcome

• Significantly reduced operating costs through smart power solutions
• +1 more outcomes

Named customers4 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Three partnerships are on record, tiered core.

• ABBcoreTechnology or IntegrationABB is a key technology partner for HV and LV maintenance services. As an ABB partner, 4ON can access the full range of spares directly from the manufacturer, including breakdown stock for most devices and accessories.
• Schneider ElectriccoreTechnology or IntegrationSchneider Electric is a partner for HV and LV maintenance services, providing access to spares and supporting maintenance operations.
• ACT Security SystemscoreChannel Partner/ Reseller/ Distributor4ON is an approved installer of ACT Security Systems products, including security and access control systems, CCTV, automated doors and barriers, intercom systems and perimeter protection.

Scale indicators3 records

Recent moves6 records

Expansion highlights6 records

Market position

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/4on-365

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

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 4ON 365 Ltd