Generator Size Calculator for Air Conditioner

AC Generator Size Calculator

Here’s a table summarizing the key information about generator sizes for air conditioners:

AC Size (Tons)	Estimated Running Wattage	Estimated Starting Wattage	Minimum Recommended Generator Size
1 ton	1,800 watts	3,600 watts	5 kW
1.5 tons	2,700 watts	5,400 watts	8 kW
2 tons	3,500 watts	7,000 watts	11 kW
2.5 tons	4,400 watts	8,800 watts	13 kW
3 tons	5,200 watts	10,400 watts	14 kW
3.5 tons	6,000 watts	12,000 watts	16 kW
4 tons	6,800 watts	13,600 watts	17 kW
5 tons	8,500 watts	17,000 watts	20 kW

Key points to remember:

1. Starting wattage is typically 2-3 times the running wattage14.
2. Always choose a generator that exceeds your AC’s starting wattage2.
3. Consider additional appliances you want to power when selecting a generator size5.
4. Portable generators are suitable for window units, while standby generators are needed for central AC systems5.
5. Some generators have load management features that can help optimize power distribution7.
6. It’s always best to consult with a professional to determine the exact generator size for your specific needs25.

Remember, these are general estimates. Your specific AC unit may have different power requirements, so always check the manufacturer’s specifications14.