For some businesses, a single high-capacity diesel generator paired with key components like an uninterruptible power supply (UPS) and an automatic transfer switch (ATS) can provide sufficient backup power during an outage. This setup can keep essential operations such as data centers, manufacturing lines, and logistics systems running without interruption.
However, many organizations operate at a scale or level of criticality that demands more than a standalone solution. Whether due to higher power requirements or a business continuity plan that avoids single points of failure, relying on just one generator may not be viable. In these cases, multiple generators are often deployed, but they may not be configured to operate together as a cohesive system.
If your business requires greater backup capacity, built-in redundancy, or enhanced operational flexibility, paralleling generators may offer the ideal solution. This approach involves running two or more generators in synchronization, enabling them to function as a unified power source. And thanks to modern control systems, paralleling is now far more accessible, reliable, and cost-effective than ever before.
What Is Generator Paralleling?
Paralleling generators means operating two or more generator sets simultaneously to produce a combined power output. Traditionally, this required precise synchronization of voltage, frequency, and phase, typically a task for experienced electrical engineers.
Today, advancements in generator technology have simplified the process. Intelligent digital control systems now manage synchronization automatically via simple networked connections, making paralleling a practical option for a wide range of commercial and industrial applications.
Is paralleling the right fit for your standby power strategy? Consider these four key advantages.
Advantage #1: Scalable Power Capacity
One of the most compelling benefits of paralleling is scalability. As your business grows, so do your power requirements. A paralleled system allows you to increase capacity quickly and efficiently by adding additional generators to the system. This eliminates the need to overhaul your entire infrastructure.
This flexibility is ideal for businesses with seasonal demand fluctuations. You can temporarily rent a generator during peak periods or permanently expand capacity as needed. Better yet, you can tailor your investment by purchasing generators of various sizes, matching capacity to your actual usage over time. This modular approach helps spread out capital costs while ensuring your power system evolves with your business.
Advantage #2: Optimized Efficiency
Diesel generators operate most efficiently when running between 75% and 80% of their rated capacity. With a paralleled system, you can configure generators of varying sizes and selectively bring them online to meet load demands. This means each generator can consistently run at or near its optimal load point.
The result is a more efficient system overall, offering benefits such as:
- Reduced fuel consumption
- Lower emissions
- Extended equipment lifespan
- Improved reliability
Compared to a single oversized generator, a paralleled system can significantly reduce operational costs while supporting sustainability goals.
Advantage #3: Simplified Maintenance Scheduling
Paralleling generators not only enhances uptime, it also makes maintenance easier and safer. With multiple units in operation, one generator can be taken offline for scheduled service without disrupting power to critical systems.
This eliminates the need for temporary rental units during maintenance and supports a proactive, consistent service schedule. Maintenance can be strategically planned during off-peak hours, improving cost-efficiency and extending the life of your power infrastructure.
Advantage #4: Built-In Redundancy for Critical Loads
A paralleled system inherently provides redundancy. If one generator fails during an outage, the remaining units automatically take on the load, minimizing risk and ensuring business continuity. This built-in fault tolerance makes paralleled generators especially valuable for mission-critical environments where downtime is not an option.
In addition, parallel systems support load shedding, a control strategy that allows you to prioritize which systems or operations receive power if capacity is temporarily limited. This ensures that your most essential operations stay online, even in worst-case scenarios.
Are Parallel Generators Right for Your Business? We Can Help.
Thanks to smart controls and modern integration tools, paralleling generators is no longer a complex or niche solution. It’s a reliable, scalable, and efficient strategy for businesses with evolving power needs and zero tolerance for downtime.
At Global Power Supply, we specialize in designing and delivering customized backup power systems, including advanced parallel generator setups tailored to your operational requirements. Our expert engineers can help you determine whether a paralleled system is the right fit for your facility.
Contact us today to learn more about our products, services, and how we can help you build a more resilient power strategy.