Can You Use an Automatic Transfer Switch with a Portable Generator?

Portable generators are a handy solution for power outages and other sudden electricity interruptions. However, using them seamlessly with a home's electrical system often requires an automatic transfer switch (ATS). This article explores the feasibility and practicalities of integrating a portable generator with an ATS, including important considerations and safety guidelines.

Compatibility and Connection

To effectively use an ATS with a portable generator, it is crucial to ensure that the ATS is compatible with the generator model. Some ATS units are specifically designed for stationary generators, so it is essential to check the specifications. Properly connecting the generator to the ATS is another critical step. This involves connecting the generator to the ATS through a suitable inlet box or connection point, ensuring the generator's power can safely feed into the home's electrical system.

Power Rating and Safety

Another key consideration is the power rating of the generator. The output must meet the requirements of the ATS and the circuits you plan to power. Using a generator with insufficient power could result in equipment damage or safety hazards. Additionally, it is recommended to have a licensed electrician perform the installation to ensure compliance with local codes and safety standards. This not only enhances convenience but also protects against safety risks.

Manual Override and Safety Precautions

Adding a manual override feature to the ATS can be beneficial, especially if the automatic function fails or if you need to switch to generator power manually. Safety should always be a top priority. This includes adhering to safety guidelines and avoiding the risk of backfeeding into the electrical grid. Backfeeding can endanger utility workers and damage equipment.

Specific Product Recommendations

One widely recognized product is the Symphony II ATS, which is compatible with a range of generators, including various portable models. It’s important to note that while the Symphony II ATS is available, some specific generator models, such as the Briggs Stratton plan, may soon be discontinued. Even so, the ATS still functions effectively, though you may need to source additional components or enclosures yourself.

Installation and Cost Considerations

The cost of an ATS can be significant, often exceeding $1000, and this amount is often higher than the cost of a small generator. A small generator can manage only a few circuits and requires extensive wiring to manage the generator's start-up and shut-down functions. This wiring can add to the expense. Therefore, many people elect to have a portable generator ready on extension cords, which can be costly themselves. Even with a gasoline generator, there are drawbacks, such as the deterioration over time, especially when subjected to frequent use with gasoline. For long-term use, whole-house generators powered by natural gas or propane are often more reliable and cost-effective.

In summary, while it is possible and often beneficial to use an automatic transfer switch with a portable generator, it requires careful planning and consideration. Ensuring compatibility, adhering to safety guidelines, and having proper installation and maintenance in place can help you achieve a seamless and safe power transfer during outages. When purchasing and installing such systems, it’s advisable to consult with professionals to ensure all requirements are met and to optimize the functionality of your power management system.