When I did the electrical upgrade on my 1966 41 TC, we were planning to use these. My installer contacted them prior to ordering to learn the technical side of the install and wiring diagrams. IIRC their response was woefully inadequate. YMMV. We opted for a Hubbell unit.
Edit: I enlarged that photo and noted the "boost" wording. Be careful with that. When you need the boost feature, you need it. But not all the time. "Smart" boost units are very pricey!