Client
Ensuring power continuity for leading data centre
Data Centre Temporary Power
This case study shows how MEMS Power Generation supported a London data centre during a prolonged power outage. A fully managed Data Centre Temporary Power solution avoided downtime, protected SLA commitments, and maintained uninterrupted operations.
A major London data centre experienced a critical power failure after a localised ground fault damaged underground high-voltage lines. The resulting phase-to-ground short tripped the breaker, cutting off utility power. While the site’s N+1 redundancy and UPS bridged the initial gap, the outage was expected to last three weeks — far beyond typical backup runtimes.
To prevent unplanned downtime and avoid risk to SLA obligations, the operator brought in MEMS Power Generation to deliver a fully managed Data Centre Temporary Power solution, including generator hire, fuel oversight, and remote monitoring.
Understanding N+1 Redundancy
Data centres rely on N+1 redundancy to maintain uptime. This configuration means having at least one additional power source beyond the required number (N) to support normal operations. However, in extended outages, this margin can become inadequate if backup generators experience mechanical failures or fuel supply issues.
Without further contingency planning, an N+1 setup may not be sufficient for prolonged power disruptions. That’s why data centres turn to temporary power solutions, such as those provided by MEMS Power Generation, to maintain resilience.
Challenges of Prolonged Power Outages in Data Centres
Even brief power outages can lead to significant financial and operational losses:
- Financial Impact: Studies estimate that network downtime costs around £4,192 per minute, equating to approximately £251,520 per hour.
- Reputational Damage: Downtime can erode trust and damage customer relationships. Major outages often result in negative press, with long-term brand consequences.
- Operational Disruption: Services and business functions halt, affecting everything from customer support to supply chain management.
Temporary Power Solutions for Data Centres
To strengthen the data centre’s power infrastructure during the three-week outage, MEMS deployed:
- Temporary Power Solution:
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- 2 × 800 kVA generators operating in parallel as a 1600 kVA system
- 12 sets of 240mm cables
- A standalone 800 kVA generator with six additional sets of 240mm cables
- Site Preparation & Support:
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- Installation completed outside standard hours to minimise disruption.
- Acoustic curtains and Heras fencing were deployed for noise and security management.
- 24/7 on-site monitoring for operational oversight.
- MEMS Connect Remote Monitoring:
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- Live tracking of generator performance
- Remote diagnostics for enhanced reliability
- Fuel Management Service:
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- Continuous fuel supply oversight to ensure uninterrupted generator performance
Notable Outage in Recent History
Nottingham City Council Data Centre Outage (March 2025)
A major outage affected Nottingham City Council when an electrical fault at Loxley House caused a power failure at its central data centre. The disruption took down internal systems, phone lines, and public-facing online services, with issues lasting several days.
The fault was traced to a failure in the high-voltage switchgear’s safety circuitry, which prevented the site from restoring power quickly. Engineers had to carry out extensive repairs and testing before services could be returned online.
This incident highlights how a single fault can have widespread operational consequences. It reinforces the need for robust backup power strategies that go beyond standard on-site systems, particularly for organisations with critical public service responsibilities.
The Results
With a MEMS solution in place, the data centre achieved:
- Uninterrupted Operations – The additional power ensured business continuity and compliance with SLA obligations.
- Enhanced Resilience – Strengthened power security beyond standard N+1 redundancy.
- Cost Avoidance – Prevented potential financial penalties and lost revenue from downtime.
- Client Satisfaction – Stakeholders praised the fast, proactive response and reliability of the MEMS solution.
Key Takeaways
- N+1 redundancy is not foolproof. Temporary power solutions provide additional resilience in long-duration outages.
- MEMS delivers fully managed power solutions, from generator hire to fuel management and remote monitoring.
- A proactive approach prevents major disruptions, saving companies from financial and reputational harm.
How MEMS Supports Data Centre Emergencies
- 24/7 Availability – Rapid response at any time of day.
- Custom Power Plans – Tailored solutions for site-specific requirements.
- End-to-end Management – MEMS handles everything, from logistics to on-site support.
For mission-critical environments like data centres, power resilience isn’t optional, it’s essential. MEMS ensures you stay operational, no matter the challenge.
What’s your data centre power contingency plan?
Our technical team works directly with yours to solve problems fast. Whether it’s a prolonged outage or added resilience during planned works, MEMS provides the support you need to stay operational.
Need backup power support? Speak to our team today about your contingency requirements.
