What are Drawbacks Of Using Parallel Generator Systems?

System Complexity

Parallel generator systems can be more complex to install and maintain than single-generator systems. This is because they require additional components such as circuit breakers, transfer switches, and paralleling controllers. A typical parallel kit may include a 10-circuit breaker panel, a 10kW transfer switch, and a paralleling controller with 2-4 genset inputs. Without proper planning and installation, these components can become a liability, increasing downtime and repair costs.

Efficiency Losses

When generators run in parallel, they can experience efficiency losses due to the transfer of load from one unit to another. This can lead to reduced output and increased fuel consumption. For example, if a 10kW load is being transferred from one 20kW generator to another, the receiving generator may experience a 50% load step, leading to a 20-30% reduction in efficiency. Proper sizing and configuration of the parallel system can mitigate these losses, but it requires careful planning and commissioning.

Upfront Costs

Parallel generator systems typically require a higher upfront investment than single-generator systems. This is due to the cost of additional components, cabling, and installation labor. A typical parallel kit can cost $5,000 to $10,000 or more, depending on the size and complexity of the system. However, the cost savings from reduced operating costs and increased reliability can make up for the higher upfront investment over time. To minimize upfront costs, it’s essential to carefully plan the system design and select the right components for the application.