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It depends on your power needs and the space available. Flexible thin film panels are about half as efficient as rigid crystalline panels so you'll need at least twice the space watt for watt. If the numbers add up, flexible panels are ideal for the uses you described and are very durable and weigh less. Thin film panels can also provide somewhat better performance in situations where there are small shadows on the panels, as often happens on a sailboat.
I had to go with rigid panels on my boat because even on a catamaran I couldn't find enough space for 120 watts of flexible panels.
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