Size a generator by adding up the running wattage of all equipment you need to run simultaneously, then add 25-50% headroom for motor startup surge. For a site running an SDS drill, site lighting and a radio, the JCB-G3600P (3.6kW continuous) provides comfortable capacity. For a site running a compressor, multiple power tools and lighting simultaneously, the JCB-G8000PE (7.9kW continuous) is the right choice. Both generators feature AVR regulation, producing clean AC power suitable for battery chargers, inverters and sensitive electronic equipment as well as motors and resistive loads. The G8000PE offers both 115V and 230V output simultaneously — useful for sites where 110V site tools are in use alongside 230V equipment. Always run generators outdoors or in a fully ventilated space.