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riven1950's avatar
riven1950
Explorer
Jul 09, 2017

solar battery charger question

We almost always camp with electric hookups so a lot of solar is not needed.

We do stop over at my Daughters house in Jax on the way to the Keys and on the way back. We do not stay in the TT there but we do run the frig on gas. This and the parasitic drains will run the battery down in a day or two. We have to park across the street from their house so running an extention cord for a charger across the pavement is a problem. I have been removing the battery and charging it in their garage, when it gets down to about 50%, if we are there for more than a few days. Really don't want to add another battery or golf cart batteries, unless we have too, since we don't really need the extra capacity normally.

Question: Is there a solar charger that is portable, not too big, not too expensive, that would keep up with the discharge caused by the frig / parasitic drains in a temp situation?

Don't really need it at home since we can plug into a outlet there to charge the battery / run frig when getting ready to leave, although we could use it there too. Solar orientation is good in both places.

Ideas?

9 Replies

  • My new MPG 2800QB comes with the GoPower Solar Prep Package which has a port on the side of the vehicle. I have gone through all of the documentation and can't find what this "prep package" means. Do I just buy the panels and plug them into the port? Seems like there should be more components based on solar discussions I have been reading.
  • pianotuna wrote:
    Another vote for a fixed installation. I would use nominally 12 volt panels with the Grape 40 amp solar charge controller from Home Depot.


    Home depot periodically puts the Grape Solar panels on sale, with the last sale I saw being $85 a piece for the 100 watt panels. I currently have 10 of the 100 watt panels on the roof of my 5er, and had one that was only putting out about half power. Contacted Grape by e-mail and after a couple back and forth e-mails they responded to the same day, I had a replacement panel in my hands the same week. My experience is they stand by their products.
  • Another vote for a fixed installation. I would use nominally 12 volt panels with the Grape 40 amp solar charge controller from Home Depot.
  • I used a simple small panel that I stuck in the front window of my RV when it was sitting. Used alligator clips to connect it to a cigarette lighter plug, there are almost certainly easier to use setups available now, but this one kept my RV battery charged when we didn't use it for months at a time, even through Wyoming winters. (We are at 6000' elevation so LOTS of sunlight!) I'm sure a roof unit would be great if you want to go to that trouble but a simple portable panel should work fine too.
  • Thanks for the quick replies folks. I will check on the solar units mentioned.

    Trackrig: I have several 100' extention cords already from my home building days. Thought about doing as you suggested. I was just concerned about traffic on the cord, and maybe even someone tripping on the cord crossing the side walk. Not a lot of traffic, residential, but they are at end of a subdivision street so fair amount of traffic.
  • Just put a nice 100 watt panel on the roof. It will be cheaper and easier than anything "portable". Portable can be stolen and will likely come with goofy cheap accessories you don't need.
  • Occasional use, parasitic drains, a suitcase style unit should be enough to extend the batteries. It may not keep you topped off but if you currently can stay 2 days with no problem before having to hook up a charger a 45 or even 100 watt suitcase should extend you to 4 or more days.
    Harbor freight and many others offer inexpensive units like that. Hopefully you wont have to worry about it growing legs.
  • I'm assuming this is in a residential neighborhood. If so, at around 9PM run an extension cord across the road, leave it plugged in overnight and then go retrieve it around 6AM. There won't be a lot of traffic during those hours. A cheap extension cord should last for a couple of years.

    Bill

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