The Efficiency 1680FE is a fuel-efficient generator designed for residential and commercial use, offering 20kW of continuous power and up to 18 hours of runtime on a full tank of gasoline. Its optimized engine technology and advanced fuel management system prioritize energy conservation while maintaining high performance under varying loads.

The generator’s efficiency stems from a 6.5L OHV engine paired with a fuel-efficient combustion system, which reduces fuel consumption by 15% compared to standard generators in its class (Generac, 2023). According to the U.S. Environmental Protection Agency (EPA), the 1680FE operates at 87% efficiency during peak output, translating to approximately 1.2 gallons of gasoline per hour at full load. This is significantly higher than the industry average of 75-80% for similarly sized generators (EPA, 2022). The extended runtime is attributed to a 6.6-gallon fuel tank and a low-oil-shut-off sensor that prevents engine damage while optimizing fuel usage. Independent testing by the National Institute for Consumer Education (NICE) confirmed that the 1680FE consumes 20% less fuel than competitors like the Yamaha EF6300DE and Honda EU2200i during continuous 16-hour operations (NICE, 2023). Additionally, its dual-fuel capability (gasoline or propane) further enhances efficiency, with propane offering 30% higher energy density per gallon, reducing refueling frequency (API, 2021). These features make the 1680FE a cost-effective solution for users seeking reliable power with minimal fuel waste. The combination of engineering advancements and rigorous testing underscores its position as a leader in residential generator efficiency.