Sorry for the delay. We also have a Bristol 35.5c. In 2010 we added Uni-solar panels and an arch above the bimini to support them. See attached photos. Our first step was a mockup with cardboard and pvc pipes. If you would like more details, let me know. We were briefly in a very strong storm front a few years later, with windspeeds recorded by a nearby Canadian Coast Guard at 125mph. Everything stayed in place with no damage, except for a few stitches on the bimini. The Uni-solar panels were specifically chosen for their design to reduce the loss from a shadow crossing a panel, e.g., a shadow of the backstay or radar pole. The large one is 64 watts, and two 11 watt panels.
We also upgraded the refrigeration holding plate, to twice the thickness, to reduce the need for solar power to keep the eutectic solution frozen. A lot more energy is needed to freeze the panel. Keeping the panel below freezing enables a much smaller draw on the solar system and batteries.
With these two upgrades installed, we have since never had to run the engine to charge the batteries. Our usually sailing is to sail every day that is nice, and anchor overnight. If the weather is foul, we may not raise the anchor for 2-3 days, which means no running the engine for 2-3 days.
Marilyn
"Adena" 1989 Bristol 35.5c