Quick Answer
Knowing the starting vs running watts of a generator is crucial for selecting the right size to meet power needs, especially when choosing a portable generator. This distinction helps avoid under-sizing or over-sizing, ensuring adequate power supply and preventing potential damage. It also aids in fuel efficiency and longevity of the generator.
Understanding the Importance of Starting Watts
When sizing a portable generator, it’s essential to account for the startup or starting watts, which typically range from 2 to 5 times the running watts. This is because generators require more power to start the engine and load the appliances, especially those with high startup currents. For example, a refrigerator might require 600 starting watts but only 200 running watts.
Calculating Running and Starting Watts
To determine the required generator size, you need to calculate the total running watts of all appliances and add the starting watts of the largest appliance. Let’s consider a scenario: a 200-watt coffee maker, a 300-watt laptop, and a 500-watt refrigerator. The total running watts would be 200 + 300 + 500 = 1000 watts. The refrigerator has the highest startup power requirement of 600 watts. Therefore, the minimum required generator size would be 1000 (running watts) + 600 (starting watts) = 1600 watts.
Choosing the Right Generator Size
When selecting a generator, consider the total running and starting watts of all appliances and add a 20-25% buffer for peak loads or unexpected increases in power demand. In our example, a 1600-watt generator would be the minimum size required. However, considering the 20-25% buffer, a 2000-watt generator would be a more suitable choice, ensuring adequate power supply and preventing potential damage to the generator or appliances.
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