i had a 100W flexible fixed panel that got water damage after 3 years. and want to replace it. i would like a 50-100% increase in battery charge. i do a 6-8 week cruise in the summer and occasional long weekend cruises between April and October (Inclusive).
initially i thought of getting a slightly larger panel with tilting mounting, but I'm beginning to think 2 fixed panels would do the same for a similar cost. i stuck my original panel which seemed good but water got under it and eventually all the paint became a soggy mess and the panel failed. I'm not keen on drilling & screwing to the roof as water might get through, so thinking of magnets. and I'm wondering about whether to have them connected serially or in parallel. parallel seems better for summer and serial for winter. and i want to avoid too many connections and keep it simple.
i would welcome suggestions on the best panels and mounting systems and connections.