How many hours can a dual-fuel generator run on one tank?

Tank Capacity and Generator Efficiency

When evaluating a dual-fuel generator’s run time, consider the fuel tank capacity and the generator’s efficiency. A larger fuel tank will give you more run time, but a more efficient generator will provide better overall performance. For example, a 20-gallon diesel tank on a 10-kilowatt generator might provide around 8 hours of run time, while a 20-gallon propane tank might give you 10 hours.

Fuel Type and Load Capacity

Different fuel types have varying energy densities, affecting run time. Diesel fuel generally has a higher energy density than propane, resulting in a longer run time per gallon. However, propane is often more convenient to use, and some generators are optimized for propane use. Load capacity also impacts run time, as a higher load will consume more fuel. For a 10-kilowatt generator, a 50% load (5 kW) might provide 12 hours of run time on a full tank of diesel, while a 100% load (10 kW) might only last 6 hours.

Real-World Examples and Considerations

When choosing a dual-fuel generator, consider real-world examples of generator performance. Look for generators with high efficiency ratings (e.g., 30% or higher) and large fuel tanks (e.g., 20 gallons or more). Additionally, consider the generator’s load capacity and the type of fuel it uses. For example, a 10-kilowatt diesel generator might be more suitable for heavy-duty applications, while a 10-kilowatt propane generator might be better suited for residential use.