Your Backup Generator May Become Part of the Power Grid

21 August 2026

Executive Summary

Large companies traditionally install backup generation to protect themselves from the electricity grid.

In parts of the United States, grid operators are increasingly looking at those generators to help protect the grid itself.

PJM Interconnection — America’s largest regional electricity grid operator, serving approximately 67 million people — has proposed a framework under which data centres and other exceptionally large electricity users could be required to reduce or transfer demand during grid emergencies, including potentially switching onto on-site backup generation before residential customers face forced outages.

The proposal comes after PJM’s latest capacity auction left it around 6.8 GW short of its reliability requirement. PJM has separately proposed procuring additional capacity to close that gap.

The commercial lesson extends far beyond data centres:

Emergency power may no longer be something a business uses only when the grid fails. It may become something the grid expects the business to use before failure occurs.

UK Impact

The precise PJM proposal does not apply in Britain.

But the risk principle is highly relevant to UK businesses operating large electricity loads.

These include:

• Data centres.
• Manufacturing plants.
• Cold storage.
• Warehouses.
• Hospitals.
• Telecommunications facilities.
• Large commercial estates.
• Industrial processing.

As electricity systems become more constrained, large consumers may increasingly encounter:

• Demand-response agreements.
• Interruptible tariffs.
• Emergency curtailment arrangements.
• On-site generation requirements.
• Capacity restrictions.
• Higher connection costs.

That means businesses should understand whether “backup” systems are being designed only for rare emergencies or may eventually become part of normal grid resilience.

Global Impact

PJM has already created formal procedures for emergency use of backup generators by large loads.

Its current emergency framework includes specific actions and warnings relating to Emergency Use of Back-Up Generators, while a 2026 update to its emergency operations manual notes previous requests to the US Department of Energy to permit large loads to operate emergency generation during stressed system conditions.

That raises important second-order questions.

A generator intended for a few hours of emergency use may have:

• Limited fuel storage.
• Emissions restrictions.
• Maintenance constraints.
• Limited run-time assumptions.
• Different insurance considerations.

If businesses are expected to operate those systems more frequently, resilience calculations can change materially.

Our View

Businesses with critical backup generation should test whether it remains adequate under a future of more frequent grid intervention.

Companies should ask:

• How many hours can our generators run continuously?
• How much fuel is stored on site?
• How quickly can fuel be replenished during a wider grid emergency?
• Do environmental permits restrict generator operating hours?
• Has equipment been tested under full production load?
• Can all critical systems operate simultaneously?
• What happens if generators are already running when the grid subsequently fails?
• Are maintenance intervals based upon emergency-only use?
• Who controls the decision to transfer from grid to generator?
• Does insurance treat extended generator operation differently?
• Are critical suppliers exposed to the same grid constraint?

A backup system should not merely be capable of starting.

It must be capable of sustaining the business for as long as the real-world scenario requires.

The changing question may therefore be:

“How long can we operate without the grid?”

rather than simply:

“Do we own a generator?”

Risk Indicator: ELEVATED

Disclaimer

The information contained within these Market Alerts is provided for general market awareness and informational purposes only. It does not constitute financial, legal, investment, regulatory or insurance advice. Whilst every effort has been made to ensure accuracy at the time of publication using multiple reputable and independently verified sources, geopolitical events, legislation, regulation and market conditions may change rapidly. Readers should obtain appropriate professional advice before acting upon any information contained herein.

Invictus Risk Solutions LLP – Helping organisations stay ahead of emerging risks through informed insight and independent analysis.