Cigatoo, we had a vetus 75 installed in our GB 36 by East Coast Bow Thuster Company he came to our boat in Maine from New York, fully mobile, and did it in one day at several thousand $ less than at least three local yards. It is a great installation, works great and is a God send when needed. Moves this big boat amazingly.
I inquired prior to install about upsizing, Joe said 75 is the one, no upside needed. I asked about 12V vice 24V...12V was the answer and he said, because the main engine start 8d battery is close enough to the thruster, I wouldn't need an additional separate battery. Ours is connected to the engine start battery, therefore is always charged....it has worked flawlessly for 4 years.
In the short spurts of run times for now thrusters the 8d has always been more than adequate even before I replaced the 10 year old one this spring.
I would call Joe Molinaro at East Coast Bow Thruster 845-551-1975 or email: JoeMo1954@ hotmail.com
Completely satisfied, recommended to many, no financial connection other than happy customer