Factors Affecting Performance When Using Generators In Parallel?

Load Balance and Synchronization

When using generators in parallel, maintaining a balanced load is crucial. The goal is to distribute the total load evenly across the generators, preventing any single unit from being overloaded or underutilized. To achieve this, you can use a load bank to simulate the loads on each generator. A 50/50 load split is generally a good starting point, but this may vary depending on the specific generator models and their ratings. As a rule of thumb, it’s recommended to maintain a maximum of 20% difference in load between the two generators.

Voltage Matching

Voltage matching is another critical factor when running generators in parallel. The voltage of each generator should be within 1-2% of each other to avoid voltage imbalance and potential equipment damage. This can be achieved by adjusting the generator’s voltage regulator or using a voltage stabilizer. For example, if you’re using two 20 kW generators with a rated voltage of 240V, the voltage on each generator should be between 236.8V and 243.2V.

Parallel Kit Considerations

When selecting a parallel kit, it’s essential to choose a kit that’s specifically designed for your generator models and ratings. A good parallel kit should include features such as automatic load sensing, voltage matching, and synchronization. Look for a kit that’s UL (Underwriters Laboratories) or CSA (Canadian Standards Association) certified, and follow the manufacturer’s instructions for installation and operation. For example, a popular parallel kit for 20 kW generators might include a maximum load capacity of 40 kW, automatic load sensing, and a voltage matching accuracy of ±1%.