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Thanks for the help. Maintaining batteries seems as much art as science. I have just got a hydrometer and will give it a try. Seems like another low tech way to test things.

After 3 years using our solar panels and 2 golf cart batteries in our van, here is a question that I have and have not yet found a clear answer. We have 200w solar panels on the roof that are always connected to and feeding the batteries via an mppt controller. To measure the battery...

So a smaller charger (lower amperage) might be slower but better for the long term health of the deep-cycle batteries?

Hello, We have been using 2 6v Costco 210 AH batteries wired in series for our camper van. Our only charging system for these has been the 200 W solar system mounted on the roof. It has worked pretty well now for a couple years. Besides running LED lights and charging phones, the largest load...

How feasible is it to install a couple 6 volt golf cart batteries underneath the body of a van. We have an extended E250 and I see some space in the back corner where they might fit. Access and maintenance would be a challenge but I am trying to imagine making a rack that could be raised or...

Yeah, that's what I thought. What is the advantage of the load terminals on the controller?

We are just setting up our system and have a Renogy 40 amp MPPT controller and a Whynter 45 qt frig.  I see that we have a choice of getting power directly from the batteries or through the load terminals on the controller. I am not clear which would be best or even sure of the advantages of...

We are putting  together a new solar system for our van.  Have ordered a kit with 2-100w solar panels and 40 amp MPPT controller from Renogy. Thing we need to power: 45 qt Whynter 12v refrigerator 4 LED fixtures, about 4w each small maybe 15" TV/DVD combo 1 laptop to charge couple of cell...