Purpose: To calculate heat rate and efficiency of selected Generac generator models (natural gas generators). Heat rate is another way to display fuel consumption.
Electrical efficiency values assume a generator efficiency of 94% at 0.8PF
Fuel consumption is presented in accordance with ISO 3046/1 with a tolerance of -0 / +5% at maximum rating.
Fuel flow calculation based on fuel with 900BTU/scf LHV and fuel consumption with a tolerance of -0/+5 %.
The purpose of this tool is to calculate generator efficiency, heat rate and fuel spend. User of this tool MUST refer to appropriate resource, such as product data sheet, GenConnect, or Generac Industrial factory representative, for actual product limitations that may be present on any of the specific products listed in this tool. Specifically this is related to restrictions on the number of operating hours, the power available at site conditions, and the duty cycle restrictions per ISO 8528-1, latest edition
Values provided are typical and not to be used in the case of liquidated damages or potential guarantees on performance. For these cases, please contact Generac for more information.
All data is based on engines with standard configurations unless noted otherwise. Generac Power Systems, Inc. reserves the right to make changes to this program at any time without notice, and without incurring obligation. It is the responsibility of the user to verify that they are using the latest version available.
This calculator is proprietary to Generac Power Systems, Inc. and by accessing this calculator you agree that you may not provide or disclose it to any third party without the prior express written consent of Generac Power Systems, Inc. This calculator is provided as a reference tool only; please contact Generac for final determination of available power. Generac Power Systems, Inc. does not guarantee engine performance calculated based on this calculator due to user input being that which determines calculator output.
This calculator is provided "AS-IS" without warranty of any kind, either expressed or implied, including but not limited to, the implied warranties of merchantability and fitness for a particular purpose. In no event will Generac Power Systems, Inc. be liable to you in law or equity for damages consequential or otherwise, arising from your use of this calculator.
* = required field, † = See Disclaimer
(*,†) Power Output:
(*,†) Annual Run Hours:
*Fuel Cost Unit:
*Fuel LHV Unit:
Excecute for Results.
*Heat Rate Unit:
Fuel Cost Per Year: