How to calculate the runtime and capacity? How do I know my charging time?

Please note that whatever device(s) you are operating cannot exceed the power capacity of the power station. For example, you can run device(s) that require less than 500W on an Explorer 500 because its maximum power capacity is 518Wh. You can check your device label to obtain the wattage of your device. Or to calculate the wattage by multiplying the voltage and amps shown on your device label (i.e., 12V x 5A = 60W). Once you have both information, you can calculate the runtime of your device by dividing the wattage of your device to the watt-hours of the power station. 

For example, if you need to charge a 60W fan by using the 12V DC port of an Explorer 500 which comes with 518Wh of capacity, the runtime of DC charge would be approximately 8.6 hours (518Wh / 60W = 8.6hrs). The runtime will be less if 110V AC power from a power station is used mainly due to AC-DC-AC conversion loss. By applying an average 15% of conversion loss, the runtime of AC charge is about 7 hours (500Wh x 0.85 / 60W = 7 hrs). 

Certain household appliances may also require a surge peak to operate. The surge peak for our power stations stays on for a brief period. For example, the Explorer 500 with 518Wh power capacity has a surge peak of 1000W for the first 3 seconds. The actual power consumption of your device may vary depending on the make/model/setting.