To generate electricity when not tethered to 230V we use two 80W solar panels that are mounted in the stern. The mounting allow them to be fully adjustable towards the sun and even if the mounting might seem a bit fragile the 35mm stainless steel pipe has been tested in 35m/s squalls. However I wouldn’t recommend the latter. 😉
In perfect conditions, turned towards the sun, they deliver just above 9Ah together that is fed into our 3x100Ah LiFePo4 consumption bank.