Generac GP Series Generators Product Support Brochure Contact Sales Rep Generac GP Series portable generators are a welcome addition to many activities at home, at work, and away. In an emergency, portable generators can provide critical backup power. They make camping and tailgating more comfortable. And contractors appreciate the flexibility portable power brings to the jobsite. Available from 1800 to 17,500 watt.     All 2 day and overnight orders must be placed no later than 1:00 PM EST. Otherwise, order will be shipped the following business day.