Adding a 2nd battery
If I am to park for more than 1 night in one place without hookup or a lot of sun then I'm going to need a 2nd battery. Unfortunately there is no space to fit it. So the only option I can see is to...
Forum Discussion
sabconsulting wrote:
AGM does sound like a good idea. My batteries get charged from the cable running from the truck + solar. Are there considerations regarding charging voltage for this set-up?
Steve.
The only charging issue is you don't stir the liquid in an AGM. This is sometimes called equalization. The process uses higher Volts to force bubbling. Simply un-select any thing like that on your charging sources.
Usually AGM's manuals want a temp compensating charger to manage Volts. Higher when cold and lower when hot. If your solar controller doesn't do that, set the solar controller for 14.1V when it is hot, above 90F, and 14.4V otherwise. I have 2 x Optima 55AH and an 79AH Deka. The details are in my profile.
When installing AGMs, it is not necessary to place them upright, they can be placed on an end or side. Here is a Johnson Controls pdf that gives sizes and AH specs.
HTH;
John
