can this generator be hooked up to any other size propane tanks besides the 20 lb?

I had read documentation that you can use a 30 lb tank. I have only used 20 lb tanks. I would think that the 30 lb tank would be too larger for the built-in holder, but could sit beside the machine. I am not sure how you would secure a 30 lb tank to sit next to the generator.

The LP3250 unit is designed for use with only a 20 lb. or 30 lb. tank, but can be utilized with a larger tank. To ensure the unit will properly attach to your larger LP tank, we recommend contacting a local plumber, or the propane company that supplied the tank. Generac does not offer a kit or parts to attach to any other tank, but your local plumber will be able to ensure your connections are proper and meet your local code. The regulator inlet pressure from an LP tank should be between 30 and 100 psi. Please note that any damage to the unit due to utilizing a larger tank will not be covered under warranty.