Canadian Consulting Engineer

Caterpillar Moves SpecSizer Generator Set Sizing and Specifying Tool Online

April 1, 2014
By Canadian Consulting Engineer

PEORIA, IL – Caterpillar Inc. has introduced a web version of SpecSizer, an industry-leading software tool to help consulting engineers, contractors, installers and end users select the appropriate generator set based on site parameters, load characteristics and required performance, and then create a corresponding specification.


The web version of SpecSizer offers the same level of accuracy and functionality as the PC version of the software.  Additional enhancements include unlimited file storage, file sharing with anyone in the SpecSizer web community, and a refreshed interface to increase usability and organization. Up to four side-by-side generator set comparisons are now available, while a new “Expansion Capacity %” feature allows for planned site load growth for a customer’s application and system configuration.


Beyond these enhancements, a “Genset Optimizer” now runs automatically in the background of the web version and always alerts the user if a smaller generator set is available based on user-defined site conditions and SpecSizer program logic. Users also have an option to create templates for every non-motor load type available in SpecSizer, which is useful for often-specified electrical loads.


The web version of SpecSizer is compatible with multiple browsers including Firefox, Chrome, Internet Explorer, and Safari, and it is fully functional on iPad and other tablet devices.


“To increase portability of the program and expand user access, Caterpillar moved SpecSizer from a desktop program to an online application,” said John Swanson, marketing division manager for Caterpillar Electric Power Division. “This is only the first step in allowing Caterpillar to expand this valuable resource to a wider universe of portable computing platforms used by consulting specifying engineers today, and it further reflects an appreciation for the immediate need for this type of information by making it readily available to users wherever they demand it.” 


Moving this technical information online improves data integrity by providing automatic daily updates, thus eliminating a large, time consuming download process for new version releases. Most importantly all data, including user files, are securely protected according to Caterpillar’s Information Protection Guidelines. In accordance, users are provided an ID and password to access the program and protect their information.


Any questions related to SpecSizer can be directed to Electric Power’s email at


First introduced in 2006, SpecSizer has more than 11,000 registered users in 163 countries. SpecSizer provides sizing and support in eight languages including English, Chinese Mandarin, French, German, Italian, Portuguese, Russian and Spanish.


Caterpillar is a leader in the power generation marketplace with power systems engineered to deliver unmatched durability, reliability and value. The company offers worldwide product support, with parts and service available globally through the Cat authorized service and dealer network. In addition, dealer service technicians are trained to service every aspect of Cat® equipment.


For more information, visit or e-mail To interact with other power generation professionals in our online community, register at


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About Caterpillar

For nearly 90 years, Caterpillar Inc. has been making sustainable progress possible and driving positive change on every continent. Customers turn to Caterpillar to help them develop infrastructure, energy and natural resource assets. With 2013 sales and revenues of $55.656 billion, Caterpillar is the world’s leading manufacturer of construction and mining equipment, diesel and natural gas engines, industrial gas turbines and diesel-electric locomotives. The company principally operates through its three product segments - Resource Industries, Construction Industries and Power Systems - and also provides financing and related services through its Financial Products segment. For more information, visit To connect with us on social media, visit


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