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GordonThree's avatar
GordonThree
Explorer
Jun 10, 2013

inverter wiring diagram

I'm looking to electrify my little coach for intermittent off-grid camping (boon-docking and national parks). I plan to add 3 or 4 deep cycle batteries (duracell group 31 agm 12v @ 100ah)

For ac power, I'm going with a Magnum energy system, the MS2812 inverter plus a battery monitor and advanced remote.

While waiting for everything to ship in, I've been studying the manual and drawing a diagram of how I want things wired.

Here is the diagram, I welcome feedback and input, maybe I missed something.



edit: replaced broken gdocs link with working dropbox link :/
  • If it doesn't have breakers, does it at least have surge/sag protection?
  • PJDuramax wrote:
    I just hooked mine up about one month ago. All circuts are covered works well. I was amased at the 4/0 wire required for the battery. I have pics on my photo bucket I will send you the link when I figure out how to LOL PJD


    Very clean looking install. Are you not worried about the unguarded cables getting nicked / damaged under your rig? My problem, I get obsessed worrying about even the smallest detail.
  • I agree that the added 30a Eaton panel is not needed. The park breakers tend to trip early in my experience.

    If the main inverter fuse is a class T, I would go 250a or 300a rating. The auxiliary circuit protection probably should be after the inverter fuse or you are at 500a rating on the battery cable. Might skip the inverter switch, just remove the fuse for long term not in use.

    Where is the solar?
  • 2oldman wrote:
    It looks like you've installed a new panel just for breakers. Doesn't the Magnum have its own breakers? Also, doesn't it have its own on/off switch, which it looks like you're also adding?

    I don't chassis ground my battery neg, but I guess that's ok. Maybe the coach came that way and I just don't know it.


    The Magnum I've selected does not have its own breakers. The twin panels are recommended by Magnum, to provide additional safety on the input to the inverter I suppose? Originally I planned to just wire my shore power cable into the inverter, since there's a breaker at the other end already, but then I got to thinking, can I trust that rv park breaker - some of them are really in bad shape. The extra panel also gives me space to move some circuits off the inverter, in case I should have trouble down the road.

    The on/off switch I guess isn't strictly needed. The Magnum provides a "soft" or electronic on/off switch, but the instructions want you to open the fuse any time you work on the unit. I'd rather just turn the marine disconnect instead.
  • I just hooked mine up about one month ago. All circuts are covered works well. I was amased at the 4/0 wire required for the battery. I have pics on my photo bucket I will send you the link when I figure out how to LOL PJD
  • It looks like you've installed a new panel just for breakers. Doesn't the Magnum have its own breakers? Also, doesn't it have its own on/off switch, which it looks like you're also adding?

    I don't chassis ground my battery neg, but I guess that's ok. Maybe the coach came that way and I just don't know it.

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