This article is part of Utilities Business Review Insights series featuring expert contributions nominated by our subscribers and reviewed by our editorial team.

Hannah Storrs, Zonar | Utilities Business Review | Utility Product Innovation of the Year

The hidden cost of downtime in energy and utility fleets

Hannah Storrs, Sr. Manager of Content , Zonar

Utility Resilience Architect

Editor’s Note: For energy and utility fleet leaders, downtime carries consequences beyond repair costs, affecting service reliability, crew productivity and customer trust. This perspective matters because it urges readers to treat fleet visibility, maintenance discipline and asset readiness as core requirements for resilient utility operations.

For energy and utility fleet managers, a breakdown is never just a mechanical problem. When a vehicle goes down on a project-based contract, the ripple starts immediately.

On a job where you committed 15 vehicles, losing two means you're solving a logistics problem instead of finishing the work. SLAs slip and contracts are lost.

In energy and utility work, what doesn't get done has real downstream consequences. Delays on infrastructure contracts can trigger penalty clauses, damage client relationships and affect future contract opportunities.

Mixed fleet maintenance

Energy and utility fleets run mixed equipment across multiple job sites, often on tight timelines. Keeping tabs on vehicle health for a fleet including bucket trucks, digger derricks, light-duty vehicles manually is not realistic. The diagnostic picture is fragmented from the start.

That fragmentation creates a pattern where problems build quietly until they become failures. A minor fault that could have been addressed early turns into a component replacement, a tow and a day or more of lost productivity.

Waiting for a warning light is an expensive strategy.

Most predictive maintenance tools are built for homogeneous fleets. Energy and utility operators rarely run one. By the time anyone notices something is wrong, the problem has been building for a while.

What catching it early looks like
Predictive maintenance platforms give fleet managers and mechanics a continuous view of vehicle health across every make and model in the fleet. When a fault code appears, the platform surfaces not just the code, but how serious the issue is, how fast it's progressing and what action is recommended.

That context turns a fault code from noise into a decision.

Hot Line Construction, Inc., an 800-vehicle mixed fleet contractor, was mid-demo of a predictive maintenance platform when the system flagged a coolant issue on a vehicle. The driver was confident he could make it back to the yard, just five miles out. The data said stop.

By stopping the vehicle, Hot Line avoided a roughly $40,000 engine replacement that day. Before the platform, the company lost one engine per year to critical failure. That's a loss they now prevent every year.

Maintenance is not just a repair strategy

The shift predictive maintenance enables is straightforward. Maintenance teams spend less time reacting to what's already broken and more time preventing the compounding damage that happens when a minor issue goes unaddressed in the field.

  • Downtime costs a fleet an average of $448 to $760 per vehicle, per day. That's the number most managers know. The number they don't track is what doesn't get done while that vehicle sits.



For fleets running on project timelines, that means fewer vehicles pulled from active jobs. Fewer gaps in crew productivity. Fewer situations where pulling resources from one project creates a second problem downstream.

The data is there. The question is whether it's surfaced in time to act on it.

See the full picture

This article covers one piece of a larger operational challenge. The Zonar white paper No room for downtime: How energy and utility fleets manage uptime, safety and asset visibility goes deeper into predictive maintenance, worker safety, OSHA compliance, asset tracking and the challenge of unifying fleet data across a complex operation.

Download the white paper: https://www.zonar.com/whitepapers/how-energy-and-utility-fleets-manage-uptime

Talk to a Zonar specialist: https://www.zonar.com

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