The Real Cost of an Unexpected UPS Failure

A UPS is installed to protect an organisation when the mains supply becomes unstable or fails. Yet the UPS itself contains batteries, fans, capacitors and other components that age and require attention.

If a fault occurs unexpectedly, the cost is rarely limited to an engineer’s visit or a replacement part. The greater cost may be the disruption caused to the systems and services the UPS was installed to protect.

The repair bill is only the beginning

An unexpected UPS fault can result in emergency call-out charges, replacement components, temporary power arrangements and out-of-hours remedial work. If the system is obsolete or parts are no longer readily available, an urgent replacement may also be required.

These direct costs can be overshadowed by the operational impact. Servers may shut down, communications can be interrupted, production may stop and security, access-control or building-management systems may be affected.

Even a brief outage can lead to a much longer recovery. IT systems may need to restart in the correct sequence, databases may require checks and operational equipment may need to be reset before normal service resumes.

The true cost therefore depends not only on the duration of the interruption, but on how many employees, customers and critical processes rely on the protected equipment.

A UPS fault may not cause an immediate blackout

Depending on the nature of the fault, a UPS may transfer the load to static bypass rather than switching it off.

This can keep the connected equipment running, but it may leave the load supplied directly from the incoming mains without battery backup or the same level of power conditioning. A subsequent mains failure could then result in an immediate outage.

An external maintenance bypass can allow the UPS to be isolated for repair or replacement without a planned interruption. However, the critical load remains dependent on the mains while bypassed, so remedial work should be addressed promptly.

Why preventative maintenance matters

Many UPS problems develop gradually rather than appearing without warning.

Batteries lose capacity, fans deteriorate, dust restricts airflow and capacitors and other internal components reach the end of their service life. Loose connections, excessive temperatures and unresolved alarms can further increase the risk of failure.

Preventative maintenance allows a trained engineer to inspect, test and clean the system before deterioration develops into a more serious fault. Typical checks include:

battery condition and charging performance;
fans, capacitors, filters and electrical connections;
alarms, event history, software and firmware;
load levels, ventilation and ambient conditions;
static and maintenance bypass operation.

A detailed service report can then identify corrective work, consumable replacement and lifecycle concerns. This allows repairs and upgrades to be planned, budgeted and completed at a controlled time rather than arranged during an emergency.

The wider benefits include reduced downtime risk, improved system performance, fewer premature component replacements and clearer visibility of the condition and service history of the UPS estate.

Isn’t the manufacturer’s warranty enough?

A warranty and a maintenance agreement perform different functions.

A manufacturer’s warranty may cover eligible parts and labour if the UPS develops a fault, but it does not normally include routine preventative servicing. It may also provide no guaranteed response time or commitment to attend site within the timescale your organisation requires.

For a business dependent on continuous operation, knowing that a repair may eventually be covered is not the same as having regular inspections, technical assistance and a defined emergency response when a problem occurs.

Protecting your organisation with an NSSE maintenance plan

NSSE offers scheduled UPS maintenance agreements tailored to the equipment, site and level of operational risk.

Options include annual or six-monthly servicing, 24/7/365 technical support and emergency cover, with timed site-response options available. Support is available for most leading UPS manufacturers and can cover a single system or multiple units across one or more locations.

Each service includes an assessment and testing of the UPS, batteries, key components and operating environment, followed by a detailed condition report and practical recommendations.

Before treating maintenance as an avoidable expense, consider:

Which systems and services would stop if the UPS failed?
How many employees, customers or site operations would be affected?
How long would safe recovery take?
Is the UPS still supported and are replacement parts available?
When were its batteries and key components last assessed?
Who would respond if it alarmed or transferred to bypass outside normal working hours?

The value of a maintenance agreement should be considered against the potential commercial and operational cost of losing the equipment and services behind the UPS.

Conclusion

The real cost of an unexpected UPS failure may include lost productivity, disrupted operations, emergency work, system recovery and a period during which the critical load is no longer fully protected.

Preventative maintenance cannot eliminate every possible fault. It can, however, identify developing problems, improve lifecycle planning and greatly reduce the likelihood of being forced into an urgent and costly decision.

To discuss the condition of your UPS or arrange an NSSE maintenance support plan, call 0333 222 4000 or email sales@nsse.co.uk.