Generator capacity determines how much power can be delivered safely and consistently. Too small can cause overloads, tripped breakers, and voltage drops. Too large increases fuel consumption and operating costs. Understanding total connected load is critical when sizing a generator.

Some equipment draws higher power during startup than during normal operation. Ignoring startup load can lead to generator overload. Proper sizing helps ensure stable power during equipment start-up and continuous operation.

Generators must be sized for everything running at the same time, not just individual loads. Multiple tools, compressors, and support equipment add up quickly. Planning for peak demand helps avoid power interruptions.

Generators are often used in remote or temporary locations. Longer runtime may favor larger units to reduce strain and support steady operation. Space, access, and refueling logistics should be considered when planning placement.