Originally Posted by 73Morgan
10 minutes will give the batteries a decent charge.
I suspect you meant to say NOT
give the batteries a decent charge.
Especially as you put a "like" on Mainesail's post above this.
For the OP, if the ascetics of the boat are the main consideration, considering it's a Hinckley the owner could have gone with a flexible solar panel of 125w or so and simply laid it flat on the deck. Ascetics should never overcome safety, and comfort of the crew is a safety must.
Going to sea in today's age with the tech we have available and expect to be able to use with only one source of power generation is not an option.