Contacts At Critical Power Supplies

At Critical Power Supplies we are available 24-7 to help you solve your power and energy management problems. Please use any of the following methods to contac us or use our enquiry form and we will respond same working day.

Office Hours

Our telesales opening hours are as follows:
9:00am to 9:00pm Monday to Friday.
9:00am to 5:30pm Saturday.
10:00am to 4:00pm Sunday.

We operate a call back service during Public Holidays while service contract customers are provided with a 24×7 contract number or can log a call via the Service Login Portal

Freephone sales, direct telephone and fax numbers are:

Sales: 0800 978 8988 (freephone number)
Service: 0845 519 3928 (local rates apply) 24×7
Fax: 0845 519 3639 (local rates apply)
International: +44(0)1844 340122

Our Northern Sales Office Direct Number.

Tel: 01302 378 678

Our London Sales Office Direct Number.

Tel: 0203 589 8998

Chat functions outside our website chat

Skype: critical_power_supplies_ltd

Each team has its own generic group email address:

    Sales & Service.

  • Sales: sales[at]
  • Project Team: projects[at]
  • Service: service[at]
  • UK Order Processing: ordersuk[at]
  • International Order Processing: ordersww[at]
  • HQ Functions.

  • Finance: finance[at]
  • HR: hr[at]
  • Marketing: marketing[at]
  • Operations: operations[at]
  • Quality: quality[at]
  • Recruitment: recruitment[at]

Please note [at] represents @ – we do not publish email addresses where possible to avoid spamming spiders.

Outside Working Hours Service

Clients with a 24-7 maintenance contract are provided with a 24-7 technical support and service alarm telephone number. These sites may also be remotely monitored by Critical Power Supplies using specialist monitoring software.

Please do not forget you can use your Service Portal and once logged in report faults, check status of tickets and request PM visits.

If you require assistance outside of our normal working hours and do not have a maintenance contract please call: 0845 519 3928 (local rates apply).

Visiting Critical Power Supplies Head Office

We are always happy to receive visitors to our head office and are based in Thame in Oxfordshire within easy reach of central London, Birmingham, Bristol, Northampton, Reading.

Head Office and Warehouse
Critical Power Supplies Ltd, Unit F, Howland Business Park, Thame, Oxon OX9 3GQ

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