(old) Interactive DIY Solar Wiring Diagrams for Campers, Van’s & RV’s

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SOLAR WIRING DIAGRAM SURVEY

The diagrams on this page are user-requested.  Help me to help you and let me know what solar setup you are working on by filling out this survey: https://www.explorist.life/solarsurvey

Quick note before we get started.  This is just one part of an overarching “How to Install a DIY Camper Van Electrical System” series.  If you’ve just stumbled on this article directly without seeing that, there are likely some things we’ve already covered.  If you want to check out that step by step guide, you can do that here: https://www.explorist.life/diy-campervan-solar

Watch the Video Below to Learn How to Best Use These Diagrams:

On the Images below, most of the components are clickable.  Play around with it and click on any of the images you wan to know more information about.  Below the Image, there is a toggle bar you can click and see a shopping list for the ENTIRE project.

MAIN COMPONENT DISCOUNT BUNDLE

OTHER MAIN COMPONENTS (available on amazon)

WIRES

CLICK HERE TO ADD ALL WIRES TO YOUR AMAZON CART

LUGS & WIRE TERMINALS

CLICK HERE TO ADD ALL LUGS & WIRE TERMINALS TO YOUR AMAZON CART

BREAKERS & FUSES

CLICK HERE TO ADD ALL BREAKERS & FUSES TO YOUR AMAZON CART

Misc

CLICK HERE TO ADD ALL MISC ITEMS TO YOUR AMAZON CART

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20 thoughts on “(old) Interactive DIY Solar Wiring Diagrams for Campers, Van’s & RV’s”

  1. Fantastic effort with this website, you need to write a book! Only thing I found was Marine centric. Question is about the feeds to the DC fuse block, with the modest DC loads that a van conversion might have is the 2wire feeds needed? Thanks for maintaining access to old wiring plans as that’s what I’ve referring to.

    1. Either way. I like running the negative wires back to the fuse block as there is less chance of having grounding issues, IMO.

  2. Hi,

    In your diagram of the connections to the 100/30 charge controller, you show the 10 ga leads from the solar panel array on the left two terminals, and the 8 ga leads back to the battery on the right two terminals.

    Maybe the configuration of terminals has changed but mine were the opposite.

    “Battery” terminals Pos/Neg on the left, and “PV” terminals Pos/Neg on the right.

    Has anyone else noticed this?

    1. PLEASE PLEASE PLEASE wire according to the product manual. My diagrams do not supersede the information in the product manual.

    2. Larry Mcalister

      Yes, mine is opposite of the way he shows it and on the BIM is also opposite. I’m sure it’s just an oversight but when you are wiring just pay attention what’s in front of you.

  3. The wiring diagrams have been invaluable!

    Thank you! I have used your amazon product links to purchase products.

  4. We are in the planning stages for building our solar system when we go full time next spring. Your attention to detail and well laid out diagram will serve as our guide.

    Thank you for what you’ve shared.

  5. Just about to embark on a build and this is amazing. Do you have any thoughts on 12v vs 24v with a DC to DC converter?

  6. In this diagram, since the MPPT solar charger is attached to the 4 post bus, it connects to the MultiPlus inverter/charger. Isn’t it better to just have the MPPT just communicate with the batteries for charging? Why send charging current back to the inverter?

  7. Hey Nate, I am wiring up my 2005 sprinter. I’m using the old wiring diagram as the new ones were not available when I began my project. The Siemens breaker seems to rock on the Square D breaker mounting points. Normal? Also, did you wire to the breaker from the inverter as shown? The black only is split by breaker and the ground and neutral just pass through the box? The instructions that came with products were not helpful. The old and the new diagrams have been a godsend. Thanks so much!!!

  8. Nate, I’m using your even older diagrams haha….
    1. Why was the aims 2000 watt inverter/charger connected directly to the batteries and not run through the positive bus bar like everything else? Should it be? and how to fuse that? 250 or 200amp fuse?
    2. Why is there a 500amp fuse between invertor and battery bank? Why so high?
    3. Would it be ok/better to run the inverter/charger to the positive busbar then add a master on/off switch between the positive bus bar and the batteries like you have in newer diagrams?
    4. Should there be another breaker/fuse between the ACR and the positive busbar? It would match the size of the fuse on the starter battery
    5. Is it okay to have all fuses mounted directly to the positive busbar?
    Thanks!!!

    1. 1: That was simply the decision we made at the time based on the limited information we had. For better/more updated recommendations on connecting inverters into the system. Please see any of the wiring diagrams made within the last year (or so) at https://www.explorist.life/solarwiringdiagrams

      2: Fuse sizes are based on 1: Manufacturers recommendations, 2: expected amperage flowing through the fuse, 3: The wire size the fuse is protecting. More Info: https://www.youtube.com/watch?v=5y-yDMEgV70&t=2s

      3: The newer diagrams do, indeed, show my most up-to date methods of connecting an inverter into the system.

      4: The diagrams at https://www.explorist.life/solarwiringdiagrams show all of the necessary locations for fuses in the system. The same wire/fuses sizes and locations can be used for either the ML-ACR or the Li-BIM listed in these newer diagrams.

      5: That is, indeed, how all of the newer diagrams are set up. https://www.youtube.com/watch?v=qrZ-cr5qEwU

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