I am the owner of a small remodeling company. (www.dfcremodeling.com)
I recently lost my webmaster. He was in the process of creating a generator sizing calculator for me. This is located at http://chicagogenerator.com/calculator.html. It still needs pictures. the calculator changes what is visible on the page via css, i believe. Currently, it will work without the "add more appliances or change default wattages" link. It will accurately tally up the wattage and tell the user the size generator they will need.
If someone can help me decipher this, i will put links to their website on dfcremodeling.com and chicagogenerator.com.
I am also looking for another webmaster/webdesigner/SEO specialist, if anyone is interested.