[saturndude]

Q1: I'm considering trying to do a dual setup on the batteries so I can discharge one then switch and use the other while charging the other one. How hard would this be? Is it as easy as switch batteries or am I missing something?

A1: connect them in parallel to combine their capacity, there is no benefit to charging them independently. in fact, I would say its better to buy the two batteries and keep them as a pair, that way they are matched and don't self discharge through the weaker one.



Q2:does the controller in the 2x 100watt kit charge the battery(ies) or do I need a seperate charger?

A2: the controller is the charger. it is actually a "charge controller". a PWM controller is plenty good for use on 12V panels (even though they may put out 17v in full sun) MPPT is best for higher voltage panels.


Q3: I wouldn't leave my starting battery in place and connect to one of the batteries in back, alternator in place. That would be fine correct?

if I were you I would keep the van battery in there and add an isolator commonly used in RVs that connects to the ignition and connects the batteries when the van is running therefor charging them all via the alternator


Q4: I would like to make an aero cap sort of thing for the roof of the van to hopefully decrease the drag I would get from the panels. I was thinking I would attempt building it like changzuki did his body for the centurion. keeping in mind the teardrop shape should I just go for a flat top or make it an angled top? Would it be worth trying to angle the panel(s) (I understand for max power I would have to try and park facing with them facing the sun) and top or not worth the effort?

A4: I think the best way to reduce aero drag from panels is to mount them as close / flush with the roof as possible. they actually have very thin, flexible, self-adhesive ones. sounds like a lot of effort to build a cap for something that may not do anything at all.

Also, you can mount the brackets directly to your roof without drilling holes by using the proper type of adhesive. and in my opinion it is not worth messing with tilting swiveling mounts. by the time your done designing, building, and installing them, you could have just bought another panel.



Q5: Lead acid batteries need venting for while they are charging correct? What type doesn't need venting?

correct, they should be vented. SLA (sealed lead acid) is sealed as well as "gel cells", lithium and NMh. in terms of capacity per $ there is no comparison to a deep cell lead acid batteries, it is worth just adding a vent and using them. in my opinion, Lithium batteries would be a waste in a 5,000lbs vehicle.

Q6: The reviews for the ebay solar panel are all positive, I would rather go with ebay ones because of cost. Has anyone had any problems with ebay solar panels? (maybe not necessarily the ones I linked)

A6: I have bought many eBay solar panels and been happy with all of them!

good luck!