You can run up to three room air conditioners of 10,000 BTU, which require 1,200 W rated watts and 2,200 surge watts, assuming your generator operates at maximum capacity at 80% efficiency. To manually verify this answer, follow these steps:
Convert 10 kVA into kW (1 kVA = 1 kW): 10 kVA = 10 kW.
Multiply 10 kW by 0.8 (80% efficiency) to determine the generator watts available: 10 kW × 0.8 = 8 kW.
Divide 8 kW by 2,200 W surge watts of one AC to get: 8/2.2 = 3.636...
Hence, you can run 3 ACs. Read more