CEL Building Services Ltd
"Just a quick note to confirm that the UPS units successfully completed their site acceptance test today and I would just like to place on record my thanks for the service you and your engineers provided. The time restraints placed on us were challenging to say the least, to complete the testing so professionally, and with a day to spare was a great achievement. Once again ,please pass on my sincere thanks to your engineers for their excellent performance. I look forward to working with you and your team in the future."
Site Manager for CEL Building Services

EMCOR Facilities Services
"I would like to add a big thank you to all involved for their quick response to resolving an urgent situation which was in the early hours. Once again very professional and knowledgeable. I was greatly impressed but not surprised that CPS carried the spares to repair an old unit. Over the years I found CPS to be always very helpful with resolving problems, accommodating with arranging service dates, courteous at all times and who's expertise UPS field is exceptional. Once again thanks to everyone else at CPS."
Electrical Technician for EMCOR

Phoenix Electrical Ltd
"Just a quick email to say thanks for your hard work and efforts. You aided in what was potentially a difficult project and provided support to which the Client has expressed their gratitude to the teams in achieving the Infrastructure handover on time. Also you have my personal thanks! Please pass this to all in your organisation that were involved. I look forward to working with you in the future."
Senior Contracts Manager for Phoenix Electrical

Coda Scisys
“Consistent uninterrupted power is key to our business operation and we have been able to work with Constant Power Services over the last seven years to ensure it’s provision at several of our sites. We have found CPS to be a reliable and resourceful provider offering us the knowledge, skills and service required to both upgrade and support our power equipment Working closely alongside other consultants and ourselves CPS have been able to ensure our latest project at our CODA Harrogate office has gone smoothly and reached completion within timescales and with minimum business disruption. We look forward to continuing our business relationship with them for both new and existing work.”
Group Facilities Manager for Coda

Peoples Choice Insurance
“The whole project was carried out swiftly, on time an in budget. CPS are without doubt one of the most professional and knowledgeable companies in their field that I have had the pleasure of working with. By working through the weekend, and other unsociable hours, they have installed a superb back up system without a single minute of lost sales time.”
Facilities Manager for Peoples Choice

National Grid
“National Grid plc have used the services of Constant Power Services for over 15 years for the design, supply, installation and maintenance of Uninterruptible Power Supply systems form 1.5MVA to 30kVA. I have found them to be an extremely reliable, efficient and dedicated company who will always endeavour to provide support no matter when, or what is requested of them, for example: National Grid recently experienced a complete failure of a static 100kVA unit supporting 24/7 systems at a major National Grid site. The supplier of the UPS (not CPS) stated the UPS was beyond repair and could not source a replacement for several days. After consulting with senior engineers at CPS, a new 125kVA UPS unit was supplied, installed and fully operational within 48 hours. CPS is a company my colleagues and I have come to respect and rely upon and as Engineering Manager responsible for 24/7 operations throughout the UK, I have no hesitation recommending CPS.”
Engineering Manager for National Grid

Port of London Authority
"The Port of London Authority (PLA) operates a number of key installations dealing with safety of navigation and monitoring of vessel movements on the Thames. Constant Power Services (CPS) has provided the PLA with a high quality service since 1999, installing and maintaining Uninterruptible Power Supplies (UPS) at 14 sites (approximately 75% of our requirements) along the Thames. CPS has a professional approach to all aspects of their work from the first enquiry through installation and commissioning continuing on to the maintenance and servicing. The reliability of their products has resulted in the gradual increase in the number of CPS UPS units used by the PLA and the comprehensive maintenance agreement helps to prevent unbudgeted repair costs becoming an issue on the extremely rare occasions that a fault may occur."
Electrical Systems Engineer for PLA

London Borough of Newham
“Newham Council have used the professional services of Constant Power Services Ltd since 1993, for provision of Power Supplies; renovation and servicing of existing Generator sets, the provision of new sets and rental of Standby Generator Sets. These systems have been inter-linked with new UPS Systems ranging from 40kVA to 125kVA as well as small UPS Systems for local communications equipment, all supplied and installed by CPS. Their professional approach to new enquiries from myself and other Council Officers has enabled essential Computer and Communication Services to be protected from supply failures and subsequent loss of these services. Their after-sales service and Maintenance staff are meticulous in their attitude and attendance when dealing either routine Maintenance visits or Emergency Calls to Council sites. CPS will be prominent in assisting Newham Council in supply and installation of Standby Power as it moves to the future provision of Computer and Communication services to its multicultural community.”
Principal Engineer for London Borough of Newham

J P Boden & Co Ltd
“Just to let you know how impressed we all were with the excellent job CPS did on the UPS upgrade for Boden. Even though we kept your guys hanging around due to system problems they were professionalism personified. There was minimal disruption and the job was a credit to CPS. Please pass on our thanks to your electricians as well. A great job all round.”
Technical Services Manager for J P Boden & Co Ltd