Quick Answer
Propane performs relatively well in cold starts, with a -20°F (-29°C) starting temperature being a common benchmark. However, its performance can degrade significantly below this threshold, requiring additional precautions or alternative fuel sources.
Propane Characteristics and Starting Temperatures
Propane is a common fuel choice for generators, especially in cold climates. It has a higher BTU content compared to gasoline, which means it can produce more energy per unit of volume. However, propane’s energy density also makes it more difficult to vaporize in cold temperatures, which can impede starting.
Starting Techniques and Precautions
To improve cold starting with propane, use a fuel with a lower pour point, such as propane with a 0.5 psig (3.45 psi) vapor pressure rating. Keep the fuel tank full and ensure proper ventilation to prevent condensation. When starting, allow the generator to sit for 10-15 minutes to allow the propane to warm up and become more volatile. Additionally, consider using a block heater or fuel warmer to preheat the tank and generator.
Comparison to Other Fuel Options
Compared to gasoline, propane generally offers better performance in cold temperatures due to its higher BTU content. However, propane’s performance can still degrade significantly below -20°F (-29°C). Diesel fuel, on the other hand, typically starts better in cold temperatures, but it may not be available in all areas. A well-insulated generator and a reliable starting technique can greatly improve cold starting performance with propane.
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