Can you parallel non-inverter generators?

Yes, non-inverter generators can be run in parallel with other non-inverter generators. 

However, not all non-inverter generators are capable of being run in parallel. This is because some non-inverter generators do not have the necessary controls and connections to be connected to other generators.

Key Takeaways

  1. Non-inverter generators can be run in parallel with other non-inverter generators, but not all non-inverter generators are capable of being run in parallel.
  2. It is not possible to connect a non-parallel inverter generator with a parallel-ready generator.
  3. Non-inverter generators may have limitations in parallel operation, such as differences in output, difficulty in combining power outputs, and reduced efficiency compared to inverter generators.

How you can parallel non-inverter generators?

Parallel operation of non-inverter generators requires careful planning and execution due to the complexities involved in synchronizing multiple power sources. Here’s a detailed, advanced guide for paralleling non-inverter generators:

  • Understanding the Basics
    Compatibility: Ensure that the generators are compatible for parallel operation. This typically means similar power and voltage characteristics.
  • Synchronization Requirements: Understand that synchronization involves matching voltage, frequency, phase sequence, and phase angle.
  • Preparation Phase
    Generator Selection: Choose generators with similar capacities, voltage ratings, and frequency.
    Load Assessment: Calculate the total load requirement and determine the distribution of load across generators.
  • Synchronization Equipment
    Synchronizing Device: Install a synchronizing device for each generator. This device will help in matching voltage, frequency, and phase angle.
    Circuit Breakers: Ensure each generator has a circuit breaker for protection and control.
    Control System: Implement a control system capable of load sharing and frequency/voltage regulation.
  • Physical Setup
    Parallel Kits/Cables: Use appropriate parallel kits or cables designed for generator paralleling.
    Cooling and Ventilation: Ensure adequate cooling and ventilation as multiple generators will generate more heat.
  • Synchronization Process
    Start Generators: Start the generators separately and let them stabilize.
    Manual Synchronization: Using the synchronizing device, manually adjust the speed and voltage of the generators to bring them into phase.
    Automatic Synchronization: Advanced setups may allow for automatic synchronization using automated controls.
  • Load Sharing
    Equal Load Distribution: Adjust the control systems to ensure load is equally distributed among the generators.
    Monitoring: Continuously monitor the load on each generator to prevent overloading.
  • Safety and Protocols
    Safety Checks: Regularly perform safety checks for any electrical hazards.
    Emergency Procedures: Establish emergency shutdown procedures in case of failure or synchronization issues.
  • Maintenance and Testing
    Routine Maintenance: Regular maintenance is crucial for the reliable operation of paralleled generators.
    Periodic Testing: Test the parallel operation setup periodically to ensure everything functions as expected.
  • Documentation and Training
    Documentation: Keep detailed records of the setup, operation, and maintenance procedures.
    Training: Ensure that personnel are adequately trained in operating and maintaining the paralleled generators.
  • Troubleshooting
    Identify Common Issues: Be aware of common issues like phase mismatch, frequency drift, or load imbalance.
    Prompt Response: Develop a quick response mechanism for troubleshooting and rectifying issues.
  • Environmental Considerations
    Noise and Emissions: Take measures to mitigate noise and emissions from multiple generators.
  • Regulatory Compliance
    Compliance with Standards: Ensure that the parallel operation complies with local electrical codes and standards.

Can you connect a non-parallel inverter generator with a parallel-ready generator?

No, you can’t.

Connecting a non-parallel inverter generator with a parallel-ready generator is generally impossible. This is because non-parallel inverters and parallel ready generators are designed to operate differently and are incompatible.

Non-parallel inverter generators are designed to operate independently without being connected to other generators. They typically do not have the necessary controls and connections to be connected to other generators, and attempting to do so may damage the generator or create safety hazards.

However, it’s important to note that paralleling non-inverter generators requires careful attention to factors such as synchronization, load balancing, and phase matching to ensure a safe and efficient operation.

Limitation of non-inverter generator in parallel operations

  • Load balancing challenges: Non-inverter generators may struggle to maintain proper load balancing during parallel operations. This is because they rely on mechanical governors, which are less precise in responding to changes in load demands. Consequently, one generator may become overloaded, while the other may under-utilize its capacity. This inefficiency can lead to unnecessary fuel consumption and potential damage to the generators.


  • Synchronization limitations: Synchronizing non-inverter generators can be more difficult compared to inverter generators. Non-inverter generators use an alternating current (AC) output waveform, which must be synchronized in terms of frequency and phase to ensure smooth and stable power delivery. Achieving precise synchronization can be challenging, and any deviations may result in operational issues or even damage to connected equipment.


  • Voltage regulation disparities: Non-inverter generators often employ less advanced voltage regulation systems. As a result, the output voltage can fluctuate significantly during parallel operations, especially when subjected to varying load conditions. These fluctuations can affect the performance of sensitive electronic devices and may even cause damage in extreme cases.


  • Harmonic distortion concerns: In parallel operations, non-inverter generators can produce higher levels of total harmonic distortion (THD). High THD can lead to decreased efficiency, increased power losses, and potential harm to sensitive electronics. In contrast, inverter generators typically generate a cleaner power output with lower levels of harmonic distortion.


  • Reduced scalability and flexibility: Non-inverter generators generally lack the built-in parallel capability found in modern inverter generators, making it more challenging to scale power output according to changing requirements. To parallel non-inverter generators, additional equipment such as paralleling switchgear or manual synchronization may be required, which increases complexity and cost. This limitation reduces the flexibility to adapt the system to changing power demands efficiently.

Why some non-inverter generators may not be suitable for parallel operation

There are several reasons why some non-inverter generators may not be suitable for parallel operation.

One reason is that not all non-inverter generators are designed to be run in parallel. This means that some non-inverter generators may need the necessary controls and connections to be connected to other generators.

Another reason is that non-inverter generators typically do not produce a stable, consistent output. This can make it difficult to effectively combine the power outputs of multiple non-inverter generators, as differences in output may cause fluctuations in the overall power supply.

Additionally, non-inverter generators may be able to produce a different level of power output than inverter generators.

Inverter generators are designed to produce a stable, consistent output, making combining their power outputs easier. This can make inverter generators a better choice for applications where parallel operation is necessary.

Overall, the limitations of non-inverter generators in parallel operation make them less suitable for some applications compared to inverter generators.

It is essential to carefully consider these limitations and consult the manufacturer of the non-inverter generators in question before attempting to run them in parallel.