Can I Use a Generator as Backup for My Solar Air Compressor?

Choosing a Compatible Generator

When selecting a generator for your solar air compressor, consider the compressor’s power requirements. A rotary screw compressor typically consumes between 3-10 kW of power, while a piston model usually requires 1-5 kW. Ensure your generator can handle the compressor’s maximum power consumption. For example, if your compressor has a maximum power rating of 7 kW, a 10 kW generator would be sufficient. It’s also crucial to consider the generator’s surge capacity, which should be at least 1.5 times the compressor’s maximum power rating.

Generator Size and Capacity

When choosing a generator, consider the compressor’s operating hours per day and the desired backup duration. For instance, if you want the generator to provide backup for 8 hours a day, a 10 kW generator with a 12-16 hour runtime at 50% load would be suitable for a 3-5 kW compressor. To ensure a seamless transition, consider using a generator with a built-in automatic transfer switch (ATS) or an external ATS with your solar panel system.

Tank Storage and System Setup

When setting up your system, consider the compressor’s tank storage capacity and the solar panel array’s output. A larger tank allows for more flexibility in solar panel output fluctuations. Ensure your solar panel array is sized to meet the compressor’s power requirements and provides a minimum of 1-2 days of backup power. You can also consider installing a battery storage system to provide additional backup power during prolonged periods of low solar irradiance or at night.