Quick Answer
Short answer: A minimum wattage of 400-600 watts is often recommended for small electric power tools, but this may vary depending on the specific tools and their usage.
Choosing the Right Wattage for Electric Power Tools
When selecting a portable generator or inverter for powering electric power tools, the minimum wattage requirement is crucial. A general rule of thumb is to add up the wattage of each tool and then add 10-20% to account for startup surges and other losses. For example, a cordless drill might require 150 watts, while a circular saw might require 250 watts.
Calculating Wattage Requirements
To calculate the total wattage required, consider the power tools you plan to use. A list of common power tools and their wattage requirements includes:
- Cordless drill: 150-200 watts
- Circular saw: 250-300 watts
- Reciprocating saw: 300-400 watts
- Impact driver: 150-200 watts
- Rotary hammer: 400-600 watts
Sizing a Portable Generator or Inverter
Based on the calculated wattage requirement, choose a portable generator or inverter with a sufficient output capacity. For example, if you need a total of 800 watts to power the listed tools, select a generator with a 1000-1200 watt output capacity to ensure reliable operation and account for startup surges. When selecting a generator or inverter, look for models with a high surge capacity to handle the startup requirements of the power tools.
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