First of all - since BrewBit has 120V output you will need an AC-AC type SSR. Like this one http://www.ebay.com/itm/Solid-State-Relay-SSR-AC-AC-25A-70-280VAC-240-480VAC-25A-/171052325183
You can use any amp rated switch if you will switch SSRs control circuit instead of output lines. See...