Luis, I would make the solar panel as large as possible. I know about the=20 money and physical limitations. Any time the load exceeds the output of=20 the panel the extra power has to come from the batteries. Remember LABs=20 don't like being left in a discharged state. It will ruin them very quickly= .. Thanks, rich! On 9/3/2014 11:50 AM, Luis Moreira wrote: > I definitely will have the mains charger and Russell's idea of induction > charging would be ideal. Can you make a DIY system for let's say 10A? > The solar panel would have to be small, as I am installing two vents on t= he > roof of the van. > Best Regards > Luis > Luis, > Adding the second battery will give you more run time but it won't > solve your charging problem. If the solar panel is correctly installed > it can be isolated from vehicle vibration. Also flaring can be installed > so that the panel is not exposed to the wind and this will minimize the > drag. > I would make the panel as large as the roof area so as to maximize > the amount of available power. Having the relay is exactly what I was > talking about and that is a good thing. Yep, money is always a problem. > You are going to have to have a mains charger. There is no way around it. > Thanks, > rich! > > On 9/3/2014 5:12 AM, Luis Moreira wrote: >> Hi Richard, >> The plan is to add a second battery pretty soon for sure. The solar pane= l >> for me is just adding drag for not very much gain. I will look into it, > --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .