You can do a little math to figure out if a generator’s watt-hour capacity meets your power needs. Watt-hours refer to the amount of Watts that it can power one hour. A kilowatt-hour (kWh) is one thousand watt-hours (Wh). You’ll need to estimate which appliances or devices you want to power and how many watts they use in total. Then, you’ll need to divide the generator’s watt-hours by the total watts to determine how many hours the generator can power those appliances. Consider whether the appliances need to run continuously and how long it takes for the generator to reach a full charge to determine if the generator’s capacity is sufficient. For example, let’s say you just want to power your 400 W fridge and you’re considering the 3.6 kWh EcoFlow Delta Pro solar generator. First, we can convert 3.6 kWh to 3,600 Wh (3.6 x 1,000). Then, we can divide 3,600 Wh by 400 watts to get 9 hours. In other words, the 3.6 kWh generator could power the 400 W fridge for 9 hours on a full charge.