Power is often easy to overlook when everything is working as you expect. But, for a commercial facility, an outage can quickly affect production, equipment, safety, data, and customer operations.
A reliable commercial power system is crucial to keeping your facility operating when utility power is interrupted. But beyond just looking at the generator size, you need to consider four critical things. How much power your facility uses, which loads are critical, how quickly the backup power must respond, and what the system will cost to operate. This will help you pick the right power generation system for your facility.
In this guide, Curtis Power Solutions outlines seven factors to consider when evaluating commercial power generation systems and related electrical infrastructure.
A reliable commercial power system is critical to keeping your facility operating when utility power is interrupted.It should match your facility’s load requirements, operating conditions, and reliability needs while remaining practical to maintain and expand.
Choosing the right power system for your facility can help you do a number of things:
The right solution will depend on your facility's specific load profile and operational priorities.
Choosing the right system requires looking beyond generator size and upfront cost. Factors that you should consider for that include the following:
Start with your actual electrical load rather than estimating based on the size of your building. Review historical utility bills, interval load data, equipment ratings, operating schedules, and seasonal changes in demand.
Pay particular attention to large motors and other equipment with significant starting or inrush loads. A generator may have enough running capacity but still struggle if several large loads start simultaneously. You should add a safety margin of around 10% to 25% to account for this.
Separating essential and nonessential loads can help you size the system more appropriately and avoid paying for unnecessary capacity.
Calculate the potential cost of downtime, including lost production, spoiled inventory, interrupted services, equipment damage, and labor costs. This helps you determine whether a conventional standby generator is sufficient or whether your facility needs a more resilient system.
Response time also matters. A standby generator can typically take several seconds to start and transfer the load. For equipment that cannot tolerate even a brief interruption, a UPS can provide power during the transition.
For critical facilities, the power generation system may therefore combine:
You can also check our guide on NFPA 110 Requirements for Emergency Power to ensure you are equipped to power your hospital, data center, or a mission-critical industry site.
The purchase price is only one part of the total cost of your commercial power system. You should look at the full cost of ownership, including fuel, maintenance, service, testing, replacement parts, and expected operating hours before picking your equipment.
Different technologies also make sense under different operating conditions.
Combined heat and power (CHP) - CHP generates electricity while capturing heat that would otherwise be wasted. These CHP systems typically achieve total system efficiencies of 65% to 80%, with some systems approaching 90%. CHP is particularly useful if your facility has consistent electrical and thermal loads that can use the recovered heat.
Your facility's electrical requirements may look very different five or ten years from now. That’s why it’s important to consider planned expansions, additional production equipment, building additions, electrification projects, and HVAC upgrades before finalizing your system.
This doesn’t mean you should install excess generation capacity today. Instead, look for a system architecture that can be expanded without replacing major components or you may consider Power Generator Rental for your short-term needs.
You can consider options like modular generator configurations, paralleling equipment, expandable switchgear, and additional transfer switches. Your power generation system provider can help you ensure that your equipment can scale as your operations grow.
A generator does not operate in isolation. It has to work with your facility's existing electrical distribution system. That’s why it’s important to check the compatibility of your proposed system before selecting equipment.
Evaluate if it’s compatible with your voltage and phase requirements, main distribution equipment, automatic transfer switches, switchgear, and circuit breakers. You should also determine how power will be transferred during an outage and which loads will receive backup power.
Emergency standby power systems in locations that are seismically active or face high wind loading of up to 150 mph require a special certification and installation process. You can read more about this in our article on Seismic Certification.
Your commercial power equipment needs regular inspection, testing, and maintenance to remain dependable when an outage occurs. Your evaluation should account for applicable electrical, fire, emissions, fuel-storage, and emergency-power requirements.
Common standards and requirements may include OSHA, NFPA 70, and NFPA 70E. Depending on your facility, you might need additional standards or requirements if you run a healthcare facility, data center, or provide emergency services.
You can check our guide on Commercial Generator Rental Safety Checklist to learn what safety measures you need in place before renting your equipment.
Besides the equipment, your provider's ability to design, integrate, commission, maintain, and troubleshoot the system can have a major effect on its long-term performance.
Look for a provider like Curtis Power Solutions that can support the complete system rather than supplying a generator and leaving the rest to other contractors. Someone who provides ongoing support for remote monitoring, maintenance, upgrading your equipment, and offers spare parts and accessories too.
You can check our range of Power Generation Equipment and spare parts and discuss what your facility needs.
To sum up our discussion, we’ve designed a simple commercial power system checklist to use before selecting or upgrading a system.
Asking the right questions before selecting equipment can help reduce downtime and ensure your system is properly matched to your facility’s needs.
An upgrade may be worth evaluating when your existing system no longer matches your facility's operational requirements.
Common warning signs may include:
A load assessment and system review can help you determine whether maintenance, targeted upgrades, additional generation, or a complete system redesign makes the most sense for your facility.
When choosing a commercial power system, you need to look beyond generator size and purchase price.
You need to consider your facility's actual load profile, the consequences of downtime, response requirements, operating costs, future expansion, electrical compatibility, maintenance, and regulatory requirements.
For some facilities, a conventional standby generator may provide the right solution. Others may benefit from a combination of generators, UPS systems, switchgear, CHP, energy storage, or other distributed power technologies. The right approach is to start with the facility's requirements and design the power system around them.
At Curtis Power Solutions, we help commercial, institutional, and government facilities evaluate and implement power generation systems ranging from standby and prime power to CHP and other integrated solutions. Contact Our Team to discuss your needs.
When you’re choosing a commercial power system you should evaluate your total electrical load, the available fuel type, and your system integration needs to ensure reliable operations.
To determine the power requirements of your facility, calculate your total electrical load by conducting an equipment inventory and reviewing past utility bills. Add an additional 25% safety margin.
Commercial power systems can improve reliability through technologies such as digital monitoring, IoT sensors, UPS systems, BESS, and factory-tested integrated switchgear, which help facilities detect issues, maintain power continuity, and respond more effectively to outages.
Many commercial power systems can be designed to support future expansion through options such as additional generation, transfer switches, switchgear, or other electrical upgrades. The best approach depends on the existing system and future load requirements.