Running High-Power Equipment on Limited Electrical Service

Most facilities assume that if they don’t have enough incoming power, they simply can’t run large equipment. That assumption is usually what drives expensive utility upgrades, long delays, and sometimes abandoned projects.

But the real limitation isn’t always the amount of power available — it’s how that power is delivered over time.

A typical small facility might have a 100-amp, 240-volt single-phase service. That equates to roughly 24 kW of continuous available power. On the other hand, equipment like MRI machines, CT scanners, or industrial systems can demand 80 to 120 kW during operation. At face value, that gap makes the installation seem impossible.

The shift comes from separating two concepts that are often treated as the same: energy and power.

• Energy (kWh) is what you accumulate over time
• Power (kW) is what you need instantly

If you can store energy gradually and deliver it quickly, you no longer need the utility to match peak demand.

The System Approach

To make this work, the system is built in layers:

• Phase conversion transforms single-phase input into usable three-phase power
• Voltage transformation steps that power up to 480V for equipment compatibility
• Battery energy storage absorbs energy slowly and releases it at high output when required

The battery system is what fundamentally changes the equation.

Understanding the Math

Consider a piece of equipment that requires 100 kW to operate, while the building can only supply 24 kW. That leaves a gap of 76 kW. Instead of trying to source that from the grid, the battery system fills it.

Over time, the system stores energy during low-demand periods and releases it during high-demand events. For example:

• A 120 kWh battery system can support ~76 kW for about 1.5 hours
• Shorter, higher-demand bursts are easily handled within that capacity

This creates a controlled cycle:

• Low demand → batteries recharge
• High demand → batteries discharge

Where This Model Works

This approach is particularly effective when loads are intermittent rather than continuous. It is commonly applied in:

• Medical imaging systems
• Industrial machinery with duty cycles
• Agricultural or rural facilities
• Locations where 3-phase power is unavailable or cost-prohibitive

The Takeaway

Instead of designing around peak demand, the system is designed around average available power.

• Stay within utility limits over time
• Use stored energy to handle peaks

That’s how facilities with limited electrical service can operate equipment that would otherwise require a major infrastructure upgrade.