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Old 08-07-2020, 12:33 PM   #1
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Wiring Diagram Help

Hello,

Thanks for reading my post. Here is a novice’s wiring diagram. Please help me review it and let me know your thoughts. Thanks. Any help is appreciated.

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Old 08-10-2020, 11:09 AM   #2
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This looks like a good design to me.

My only "issue" with the diagram is that the switch labelled "3 phase" should probably use some other word than phase, since phase has a meaning in electrical. North American house wiring is single phase, split (aka split-phase), and heavy power using commercial is 3 phase.

I like the use of DIN mounted breakers. I would personally recommend keeping any DC breakers physically separated from AC breakers, since AC lines can induce AC current in nearby circuits.

It looks like you've put a lot of thought into this design, and it should work well for you.

Good luck with your build,
Jim
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Old 08-10-2020, 11:15 AM   #3
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Thanks for the advice!!!! Much appreciated
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Old 08-10-2020, 12:12 PM   #4
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Do I really see 6 batteries in paralell?

Did you get the batteries for free?
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Old 08-10-2020, 12:53 PM   #5
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Whoa, I totally glazed over the battery hookup drawing. Thanks for catching that Steve.

Even looking at it 3 times, my eyes keep crossing.

You might want to re-draw that section a bit so it is a little less confusing. I'm not sure you are ending up with 2 series by 3 sets parallel in that drawing, which I assume is what you want since it's all 24V specced.

Here's is how I would hook it up:
Screen Shot 2020-08-10 at 1.43.48 PM.png

If you draw it out that way, and think of it that way, it'll help you when you lay it out that way for installation. It's the most efficient layout for cable lengths.

In terms of the rest of your diagram, the "ground bar" and "bus bar w/terminal fuse" are natural places to break your schematic. Treat the battery side as its own schematic and keep it as simple as possible. The the other side starts at the battery connection terminals on the ground bar and bus bar terminal fuse.

I'm sorry I missed that the first time through. You don't show where the wire connects from the terminal fuse to the batteries but the assumption would be the red line, which if you follow it, leads right on over to the ground bar.

When you're talking that many batteries with that much capacity, you want to guarantee there's no chance of shorting anything out, so take the time to draw it as simply as possible. I do like that you used red ink. Also, I'm assuming you're chaining 12V batteries. You should specify the voltage on the battery diagram for each battery.
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Old 08-10-2020, 08:04 PM   #6
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Looking solid, seems you've figured out much of the mystery. That's a capable system for sure.Battery wiring did stand out to me as well, the series parallel diagram by bp1791-unleashed looks decent enough.


Only thing I can think of remaining is monitoring. Displays/gauges to watch the system and report on its performance. There's a lot on the market for watching system health.
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Old 08-11-2020, 07:51 PM   #7
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Thank you for the catch! Yes I am using 12v batteries.

Perfect diagram.

As for battery monitoring I have a monitor that connects to a shunt. I forgot to include that.
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Old 08-25-2020, 09:33 PM   #8
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I like the electrical setup. The name for the switch is Make Before Break (MBB) source selector switch. It's simple, functional, and safe.
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Old 08-28-2020, 07:36 PM   #9
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I goofed. That switch is Break Before Make. It breaks one connection before making the other.
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