Permanent mount is best so they cram the last 20% into the batts. But supplementing the fixed panels with extra stored panels when at anchor etc is a good idea idea if space is limited. You can buy panels in hinged pairs which fold up compactly briefcase style. You need a plug system, and a method of temporarily fixing them in place.
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BruceK
2005 Integrity 386 "Sojourn"
Sydney Australia
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