TL;DR
- Unused power is hard to find – Stranded capacity hides in power budgets, uneven loads, idle servers, cooling limits, and backup reserves.
- Meters alone cannot show the full picture – Effective colocation capacity management needs real-time data from across the power chain.
- Modius OpenData® brings that data together – Teams can track power, cooling, and equipment across sites to find capacity they may be able to sell.
The Problem: Hidden Capacity in Colocation Data Centers
One in four data centers uses less than 40% of its available UPS capacity, according to Uptime Institute’s 2024 survey. However, unused power is not always ready to sell.
Many colocation providers still use spreadsheets, old power budgets, and separate monitoring tools. This makes it hard to know how much power is truly available.
By the time data center operators confirm capacity, a tenant may have chosen another provider.
This affects both retail colocation and wholesale colocation. Both need accurate data on power, cooling, and colocation infrastructure.
AI and cloud services are also driving demand for more power per rack.
Unlike an on-premises data center, a colocation site serves many tenants. Each has its own power needs and service agreements.
Why Is Stranded Colocation Power Hard to Find?
A facility meter may show spare power. However, it cannot tell operators where that power is or whether they can use it. Stranded data center power often hides in five places.
1. Power Budgets That Are Too High
A rack assigned 10 kW may use only 3–4 kW. Across hundreds of racks, that gap can expand. Meanwhile, AI tenants may need 30–50 kW per rack. Teams must check real power use and contracts before reclaiming capacity.
2. Uneven Power Loads
A 30-amp circuit may deliver only 20 amps of usable capacity when one phase carries too much load.
Monitoring each circuit helps teams find these gaps.
3. Idle Servers
Research from Anthesis Group and Stanford’s Jonathan Koomey found that up to 30% of servers were “comatose.”
These servers use power and cooling but do no useful work.
4. Cooling Limits
A rack may have spare power but not enough cooling.
For example, cooling built for 8 kW per rack may not support a 30-kW AI rack.
As power density rises, teams must check power and cooling together.
5. Backup Power Reserves
Some sites may hold more backup capacity than needed in certain areas.
But protecting data center uptime comes first.
Teams must review power outages, natural disasters, equipment failures, and service agreements before changing backup reserves.
What Does Full-Chain Visibility Require?
Data center infrastructure management (DCIM) helps teams see how power moves through a facility. With data center infrastructure management DCIM tools, operators can track capacity across their power systems.
To find stranded power, operators need data from five levels:
- Facility and utility feed: Shows total spare power but not where it is available.
- UPS and switchgear – Shows power loads and backup needs, an uninterruptible power supply (UPS) helps maintain power during an outage.
- PDUs and floor distribution: Reveals uneven loads and unused power allocations. Revenue-grade meters can support accurate billing.
- Branch circuits: Shows risks and capacity limits at each breaker.
- Racks and servers: Compares assigned power with actual use.
The problem is that this data often sits in separate systems.
Colocation software and DCIM colocation tools can bring it together.
This helps colocation operations teams manage power across sites that support management services, internet services, and carrier-neutral connectivity.
Five Ways to Reclaim Stranded Capacity
Better colocation management starts with knowing where power goes.
Here are five ways to find more usable capacity.
- Use real power data – Replace old estimates with measured demand. A 500-rack site at 40% average use may have hundreds of kilowatts worth checking.
- Balance electrical loads – Find circuits with uneven loads and correct them where safe.
- Remove idle equipment – Shut down approved unused servers to free power, cooling, and space.
- Review backup reserves – Check whether reserved capacity matches real needs. Keep all required safety margins.
- Plan for future demand – Track power trends to support long-term growth and match colocation offers with available capacity.
These steps improve colocation capacity management and colocation management services.
They also help teams get more from existing physical infrastructure.
The Commercial Case for Reclaiming Power
At one site, stranded power is an operating problem.
Across 20 or 40 sites, it can become a major revenue opportunity.
Recovering 2–3% of capacity across a 100 MW portfolio could create 2–3 MW of power to sell.
At CBRE’s reported rate of $184 per kW per month, 1 MW could generate about $2.2 million in annual recurring revenue.
That assumes all recovered power can be sold at that rate. Actual revenue will vary.
Why PUE Is Not Enough
Data center energy efficiency matters, but it does not tell the whole story.
Power usage effectiveness (PUE) compares total facility energy with IT energy use.
PUE data center benchmarks help teams measure efficiency.
However, PUE cannot show which racks or circuits have spare capacity.
Teams need both energy metrics and real power data.
How Modius OpenData Helps Find Stranded Capacity
Modius OpenData® connects power, cooling, environmental, and equipment data in one real-time view.
As data center infrastructure management software, it helps teams:
- Check available power: Compare reserved capacity with real demand.
- Find hidden gaps: Track capacity from the UPS to individual racks.
- Spot operating issues: Find idle loads, uneven power use, and cooling limits.
- Compare sites: Bring data from different vendors into one view.
- Support new tenants: Show where available capacity may support high-density workloads.
The goal is simple: help operators make better use of the infrastructure they already own.
Instead of relying on estimates, teams can use real data to decide what capacity is safe to sell.
Schedule a personalized demo to see how Modius OpenData can help.
Frequently Asked Questions
What Is Data Center Operations Management?
Data center operations management covers power, cooling, capacity, equipment, and uptime. In colocation facilities, teams must also manage tenant needs, contracts, and shared systems.
What Is the Difference Between Reserved Power and Actual Use?
Reserved power is the amount set aside for a tenant. Actual use is what the equipment draws. The difference between the two may reveal stranded capacity, however not all stranded capacity can be sold.
Modius OpenData® tracks actual power use, helping teams find gaps between reserved capacity and real demand.
How Do Providers Set Safe Power Oversubscription Limits?
Teams review peak demand, tenant use, backup needs, and service agreements. However, there is no single safe ratio for every facility.
Modius OpenData® provides historical and real-time power data to help teams set safer oversubscription limits.
Can Providers Reclaim Capacity Without Building New Infrastructure?
Sometimes. Teams can adjust power budgets, balance loads, and remove idle equipment. Other problems, such as cooling limits, may need new hardware.
Modius OpenData® helps teams find unused power and capacity limits before investing in new infrastructure.
What Is the Difference Between Retail and Wholesale Colocation?
Retail colocation usually serves smaller deployments, such as racks or cages. Wholesale colocation supports larger suites and power commitments. Both need accurate power data.
Customers may include businesses moving from in-house data centers or deploying systems that support public clouds.
Modius OpenData® helps both retail and wholesale providers monitor power and capacity across racks, facilities, and sites.
References
- Uptime Institute. 2024 Global Data Center Survey.
- Anthesis Group and Koomey. Comatose Servers Redux.
- Data Center Knowledge. Why AI Data Center Projects Face Years of Delays After Approval.
- CBRE. North America Data Center Trends H2 2024.