During winter time i could fully charge my batteries from solar panels (they covered in snow all the time). Also i don't like to running my van engine for charging from alternator. So i got 3kW pure sine inverter with builtin battery charger and run it with 1kW gas generator.

Full manual to cheap DIY installation of auto-isolating dual battery system in my sprinter van conversion setup.

Scheme explanation - https://youtu.be/FWTvoyIrRXo
Items used in this installation:
- 200A relay http://s.click.aliexpress.com/e/mYV7uvb
- Automatic relay http://s.click.aliexpress.com/e/jMJ6u3Z
- 200A fuse/breaker http://s.click.aliexpress.com/e/3faeyfI

It's cool to know how much power you use from your battery system, and i found the way how to do it.

Cheap, cool thing with easy installation that makes me happy. What could i wish for more!

This video shows installation of TRIK-L-START 12V-12V battery charger & maintainer.

I install it in my system because my van start battery becomes empty time to time and i need some power source to charge it.

You can read more about device here http://www.lslproducts.net/TLSPage.html">www.lslproducts.net/TLSPage.html
All other information provided in video

In this video i actually installing 420W solar panels, charging controller and 400Ah batteries system in my van!

Enjoy and leave your questions if you have any!