How to select the capacity of portable power station?

How to select the capacity of portable power station?

1. 500W to 600W portable power station,The battery capacity is about 500Wh to 600Wh, about 150000 mA, which can supply power for about 4-5 hours for 100W devices, 1.7 hours for 300W devices such as rice cookers, and more than 30 times for mobile phones.
2. 1000W-1200W portable power station,The battery capacity is about 1000Wh, about 280000 milliamperes, which can power 100W devices for about 7-8 hours, 300W devices for about 2-3 hours, and mobile phones can be charged for more than 60 times;
3. 1500-2200W portable power station,The battery capacity is about 2000Wh, about 550000mA, which can power 100W devices for about 15 hours, 300W devices for about 5-6 hours, and mobile phones can be recharged for 100-150 times;