Day Tanks Support Back-up Generators in Extreme Conditions

A day tank is installed as a fuel source for generators or emergency equipment, but connected and supplied by a larger volume tank. In an emergency, the generator has an immediate supply of fuel – enough for approximately 24 hours, hence the name.

The day tank is replenished by the primary tank fueling the property or facility, so there is less of a risk of fuel shortages or unplanned shutdowns. However, while the day tank is fed by the main fuel supply, it also ensures power to generators and other mission-critical equipment if the larger supply is disrupted for any reason.

In 2024, Granby introduced a line of fiberglass day tanks. According to company representatives, demand for generator fuel storage has been building as the East Coast experiences more extreme weather events and the ocean surges that go with them. These conditions create a need for storage options that are more rugged than traditional tanks.

The fiberglass day tanks are approximately 50 percent lighter than traditional steel tanks, making them easier to transport, install and maintain. Fiberglass is more resistant to corrosion, is non-combustible, and UV-resistant, and the new tanks provide automatic leak detection and closed secondary containment.

Approximately the size of a residential tank, the day tank has multiple openings to make it easier to integrate with the existing fueling system.

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