Aug 242017

Or: How to charge vehicle batteries from the sun, yippie!

mobile tiny house truck - charging truck batteries from leisure batteries from the sun
Mobile Tiny House Truck charging truck batteries
from leisure batteries... from the sun!

The story was: At one point, unexpectedly (I must have forgotten to cut off the truck batteries while parking up), the truck batteries were FLAT!

After I got past my shock(!), I figured out HELP though, as follows:

  • the two solar-powered leisure batteries are always full
  • but the two truck batteries were flat
  • I still have a small Optimate (from motorbiking), and a new small volt/amp converter from China
  • The small Optimate, I calculated, would take 10 days to charge both big truck batteries (mine puts through only 0.8A)
  • I didn't want to wait that long
  • So then I charged one truck battery with the Optimate 4 (thus in an optimal fashion, but only at 0.8A)
  • ...while charging the other truck battery with the Chinese volt/amp converter (fast charging: set to 14.2V and as much Amps as the battery would draw)
  • For safety, every so often I swapped the chargers around so that the Optimate 4 keeps both batteries safe during my improvised charging exercise.

It worked like a charm, somewhat to my surprise: Within a weekend I had both big truck batteries desulfated, charged, and fully optimized. This way, I didn't have to wait 10 days (having only the smallest Optimate). And off we could go, with the truck house! :-)

For anyone mega interested(??), the Chinese volt/amp converter that I used is this, and I am happy to link to it as IT IS super quality indeed, yes.

So now I know a way to always be able to start the truck even when its batteries are flat! Mind you, I am not an electro-technician, so this solution didn't occur to me while dog walking. :mrgreen:

Also, before connecting anything (I 'm always scared sth might blow up) and before setting the charging parameters, I intensely consulted the internet community, aka "at how many volts should leisure batteries charge?", "how many amps can I safely push through this cable at this distance?", etc etc.

Next mobile tiny house living update is here


 Speak your heart out

Jonathan: "Thank you for your period advice. It is excellent! My GSD puppy is now 8 months and we read your advice regularly."
Dwayne: "I love this site and the info you post onto it. Thanks again!!!!"
Penny: "Thanks for making your great articles available to all of us. it's nice to know that a recommended product is actually available in my country."

Stay with us and your dog will stay with you, both of you healthy and well-behaved.
If you are ever unhappy with anything we write, do or don't do, we want to be the first to know, thanks.

Disclaimer: Always apply your own common sense when you follow anyone's suggestions. As much as your dog is special (s)he may react different too.

© MYGERMANSHEPHERD.ORG - All content is protected. You must not copy or spin or otherwise change our content to republish it in your name, another one's name or without a name. If you wish to make use of our Intellectual Property Rights contact MYGERMANSHEPHERD.ORG. Thank you.

There's nothing quite like a healthy and well-behaved German Shepherd who freely guards every corner of your home, who brings you peace, who brings you joy!
Welcome to MYGERMANSHEPHERD.ORG - we help you that YOUR DOG does not end up in a(nother) shelter!