Just wondering if there is any advice about solar panels. A friend has some panels, which still work, but his complete array was replaced by his insurance company after some were damaged in last years hail storm. They are Enertech SE-170M panels http://www.solare-power.com/cn/produ...ail.php?id=200

I was thinking about fitting it on a slide I'll make to fit under my roof rack, so in normal day-to-day driving it would keep the 2nd battery or possibly even both batteries charged; as there is nothing above it normally. When I go camping and want to park in the shade I can slide the panel out and put it in the sun with an extension cord.

I realise I'd need a regulator and a one way diode, to prevent the solar panel flattening the battery overnight. I have a Redarc isolator to separate the two batteries.

I haven't found anything online about the suitability or not of fitting such a panel on a 4by roof rack. What are you considered opinions, please, along with any advice to make it an even better setup. Thanks in anticipation