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Old 04-09-2021, 10:23 AM   #1
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Please Proof This Electrical Layout

I wanted to run this electrical layout by the smart guys and gals here for feedback, as I'm a complete electrical novice. Intent is for the batteries to be a 12V system.

I have two power sources, solar and shore power. The solar seems pretty straight forward. I have a transfer box, charger and inverter as the other leg... couple of questions:

1) Are fuses and wires sized right? I adapted from: https://faroutride.com/van-build/lea...trical-system/

2) What do I do about grounding the system?

3) I haven't sized AC electrical panel circuits yet. They would run a laptop charger, monitor, TV, Fridge and small kitchen appliances at most.

Any feedback much appreciated!
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Old 04-09-2021, 04:46 PM   #2
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Quote:
Originally Posted by derekmichael02 View Post
1) Are fuses and wires sized right? I adapted from: https://faroutride.com/van-build/lea...trical-system/
The 300A fuse for the inverter has me raising an eye. The 1100W inverter will pull a maximum of (100W/12V =) 91A, (assuming it is true to rating) even for 200% surge loads this seems high. 150A maybe?

Fuses/breakers are best sized to protect the run, however it seems prudent to me to go lower when known load isn't even close to what the run is rated for.

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Originally Posted by derekmichael02 View Post
2) What do I do about grounding the system?
Depends on where neutral and ground are bonded. This means different potentially different grounding strategies for shore and solar power.

Solar: Ground/Neutral is likely bound in the inverter. If not, you want to bind it _just after_ the inverter, and connect this ground run to chassis.

Shore: Ground/Neutral is likely bound at the service panel, and you _may not_ want the chassis connected to ground in this case.

More discussion is likely needed.

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Originally Posted by derekmichael02 View Post
3) I haven't sized AC electrical panel circuits yet. They would run a laptop charger, monitor, TV, Fridge and small kitchen appliances at most.
Well, 1100W / 120V is a maximum of 9A, anything larger is likely/certain to cause inverter shutdown, and yet most residential panels start at 10A/15A/20A.

It seems like you would have to go with the smallest AC breakers available for every circuit, however they are unlikely to actually trip.

Best of luck!
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Old 04-09-2021, 10:02 PM   #3
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Please Proof This Electrical Layout
I wanted to run this electrical layout by the smart guys and gals here for feedback....


Sorry, Bro. No one of that description has replied, as of yet. Receiving a response from a member of the skoolie network is not necessarily a factual answer. Maybe an opinion, or believed fact, but with electricity, it can be deadly wrong, none the less.

Have a Licensed Electrician review your progress. Pay if you must.
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Old 04-09-2021, 10:20 PM   #4
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To clarify, what you will receive here is going to be opinion/feedback/advice from a variety of sources, likely amateurs, me included. I am not an electrician, and you should consult an electrician if you truly have doubts or questions needing correct, to code answers on the subject.

I, among others, would love to hear feedback from actual electricians here, correct any misconceptions, etc but that's up to them. I'm not going to question the intelligence or credentials of other posters here, I don't see it as productive.


This in particular is where I think I can find fault:

Quote:
Originally Posted by kazetsukai View Post
Well, 1100W / 120V is a maximum of 9A, anything larger is likely/certain to cause inverter shutdown, and yet most residential panels start at 10A/15A/20A.

It seems like you would have to go with the smallest AC breakers available for every circuit, however they are unlikely to actually trip.
I was too focused on the inverter use case because it is possible the inverter would never be able to provide the output needed to trip a common residential AC breaker, this was a mistake on my part. You also have shore connectivity, but regardless you will want to size the breakers for the runs like any AC residential panel. I would just caution that repeatedly asking for more than the inverter can supply can damage it and/or cause unsafe operating conditions.


There may be other parts of my reply in error. Again, consult an electrician.
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Old 04-09-2021, 11:01 PM   #5
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[QUOTE] ......credentials of other posters here, I don't see it as productive

Saving lives is progress.

We all ought verify the credentials (license, bonded, insured) before hiring or consulting any tradesman. Many "handyman" out there proving how many words they know.

A little dangerous advise can be re-read and repeated for years. It's a shame so many lives are affected by electrical fires, many of which are created by the victims' family member.
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Old 04-10-2021, 12:40 AM   #6
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Your AC electrical panel should be sized to whatever your maximum AC supply will be. If you have a shore power inlet of 50a then you install a 60a panel. All of your branch circuits should be wired as normal. You then modify your usage to accommodate your available power. If you're on your inverter then obviously some things won't work and/or will overload the system.
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Old 04-10-2021, 01:26 PM   #7
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EDIT: Removed, unproductive, not fair to the OP.
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Old 04-10-2021, 01:40 PM   #8
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damn i just started another electrical thread?
am i gonna get the same **** show?
sorry OP.
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Old 04-10-2021, 02:01 PM   #9
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For the record, I'm licensed, bonded and insured.
CSLB 752511 since 98 or so...
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Old 04-10-2021, 02:18 PM   #10
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damn i just started another electrical thread?
am i gonna get the same **** show?
sorry OP.
Everyone seems kinda cranky lately.
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