The power quality solutions we design and install will work seamlessly for many years, but it's best practice to have them regularly checked. We recommend an annual service by one of our skilled Power Quality Service Engineers to make sure your system is running as it should, preventing downtime and delivering excellent cost and energy savings for your business.
Left unchecked, they can slowly deteriorate, allowing hundreds of pounds a month in reactive power charges increased CO2 emissions to creep back in, or worse, complete system failure.
Experts you can rely on
We've got an incredibly strong team of fully employed Power Capacitors Service Engineers covering the whole of the UK from our central Midlands base. Many of them joined us when we first set up Site Services in 2001, giving us decades of specialist technical expertise to deliver the very best service.
Our 5 Star Annual Service
A Power Capacitors Service Engineer or team will come to your site/s.
They work through an extensive 56-point list of checks, including environment, loading and suitability checks to accommodate changes in supply.
They interrogate the relay to determine the number of operations attributed to each capacitor.
Capacitors and contactors that are coming to the end of their life are replaced – avoiding reactive charges, downtime and emergency call-outs.
Full records are kept of all equipment and service history.
Our system lets you connect multiple modules in parallel, easily expanding capacity as demands grow-no technical limits holding you back.
Our engineers are trained to service and maintain ALL makes of power quality equipment, not just our own.
Our report will highlight major load or supply changes i.e. introduction of solar generation or EV charging and the subsequent effects these may have on the existing PFC/Power Quality scheme - our team of experts will advise on upgrades or reworks to sure your equipment is suitable for your system.

- One fixed annual service cost for 5 years
- One supplier account
- One site induction
- One visit per site
- One invoice – submitted after each service visit – no up-front payments required.

FAQs
Servicing helps identify issues like unnoticed capacitor failures that can lead to increased reactive power charges and potentially catastrophic failures if left unchecked.
It is recommended to service your Power Quality equipment annually.
Power Capacitors Ltd engineers perform a 56-point check, including environment, load, and suitability checks, and interrogate the relay to assess capacitor usage.
- Avoids unexpected reactive charges.
- Prevents equipment failures.
- Reduces the need for costly call-outs.
- Ensures optimal system performance.
Yes, they can maintain and service all makes of Power Quality equipment.
Power Capacitors offers a consolidated service:
- One supplier account
- One site induction
- One visit per site
- One invoice
- This saves time and administrative effort.
Yes, full service and equipment history is recorded and managed by Power Capacitors.
Yes, a fixed price service contract over 5 years is offered. It includes automatic service reminders and no upfront costs – invoicing is done after each service.
Power Capacitors Ltd has over 50 years of experience and operates the largest team of Power Quality engineers in the UK.
Find out more
Talk to our specialist After Sales Team to find out how we can develop a service package that works for you - that keeps your equipment and your business running seamlessly.
What our customers say
HVAC systems
Defence
Pulp & paper