Isolation Transformer

My moorage facility is requiring all larger boats to install an isolation transformer.  The device isolates the boat's electrical system from the marina shorepower.  I need to find an electrician and the marine-rated part. A neighbor suggested a new product by Bridgeport Electronics http://www.bridgeportmagnetics.com/contents/en-us/d56_Marine_Isolation_T....  It appears half the price of others on the market.  Its new and I'm not sure it is ABYC approved or that there are even any reviews.  Does anyone have a recommendation on an isolation transformer (30A) and an electrician to do the install?  Thanks, Steve