KOHLER POWER SYSTEMS

Appliance Wattage Requirements

This sizing chart is intended to help estimate the essential wattage requirements for appliances during an emergency utility outage. The total wattage requirement will help determine which Kohler residential generator set system will best serve your needs.

When selecting essential appliances, note the following:

1. Wattage loads for appliances are calculated two different ways:
   1. Resistive Loads: The wattage required to run an appliance.
   2. Inductive Loads: Starting wattage (appliance needs more current to start than to run). This additional wattage is required to start electric motors used in home appliances (air conditioners, refrigerators, garage door openers, etc.).
2. Estimates are intended to assist in the specification phase of assessing generator set requirements. Actual appliance wattage will vary depending on the appliance manufacturer and application.
3. Staggering the use of specific appliances can determine practical usage during an emergency utility failure.

Kohler residential power systems are UL 2200 certified, EPA- and CARB-approved, and backed by a solid service and maintenance aftermarket organization.

Transfer Switch Selection Chart

A flowchart to guide the selection of an appropriate transfer switch based on generator power, enclosure type, and service disconnect requirements.

• START
• Will the whole house be powered by generator? [No]
  • Enclosure mounted outdoors? [No]
    • Essential Loads Transfer Switch with Load Center (sub-panel), NEMA 1, 100 A (16 circuits) or 200 A (24 circuits)
  • Enclosure mounted outdoors? [Yes]
    • Essential Loads Transfer Switch with Load Center (sub-panel), NEMA 3R, 100 A (16 circuits) or 200 A (24 circuits)
• Will the whole house be powered by generator? [Yes]
  • Service disconnect required? [Yes]
    • Enclosure mounted outdoors? [No]
      • Service-Entrance-Rated, Whole-House Transfer Switch, NEMA 3R, 200 A or 400 A
    • Enclosure mounted outdoors? [Yes]
      • Automatic, Whole-House Transfer Switch, NEMA 3R, 100 A, 200 A, or 400 A
  • Service disconnect required? [No]
    • Enclosure mounted outdoors? [No]
      • Automatic, Whole-House Transfer Switch, NEMA 1, 100 A or 200 A

Note: RXT transfer switches are compatible with the 14RESA, 20RESA, 38RCL, and 48RCL models only. RDT transfer switches will work with all single-phase 8.5-125 kW generator sets.

Typical AC Electrical Requirements for Residential and Light Commercial Installation

Use the chart below to calculate estimated wattage. After calculating total estimated wattage, determine which appliances would be run simultaneously. Appliance usage can be staggered (e.g., turn off an electric range element to run a toaster). The practical home wattage requirement should be equal to or less than the kilowatt rating of the selected Kohler generator set.

For online assistance, visit Kohler's residential sizing calculator at http://www.kohlerpower.com/residential. Select "Solutions" and "Find the Right Size," then choose the "Advanced Calculator" for a detailed analysis.

Total Estimated Wattage