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What should I use for a disconnect in between my battery bank and positive busbar?

Travis55

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Joined
Oct 19, 2023
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USA
I need 350A, 48V I believe. Six-5kw EG4 batteries. This is the only thing I've found so far but not sure if it's right.


I have a 300A class T fuse there as well, but want some additional safety by being able to isolate the battery bank during maintenance etc..
 
I need 350A, 48V I believe. Six-5kw EG4 batteries. This is the only thing I've found so far but not sure if it's right.


I have a 300A class T fuse there as well, but want some additional safety by being able to isolate the battery bank during maintenance etc..
Those switches are technically only good for 48v dc. People use them for 48v systems, but technically they over allowable voltage much of the time. I would look into Midnite dc breakers as they are extensively tested and are rated for higher voltage.
 
What is your potential maximum load? There’s absolutely no sense in having a 350 amp circuit breaker or switch after a 300 amp fuse. Size the breaker to your wire feeding it.
 
They already have individual breakers built in.
No need for extra disconnect.
Alrighty thanks, i'll skip that then.

When I run the 4 hots (2 from each inverter for split phase) to my transfer switch, Do they go to separate LINE lugs, or do stack each hot from the same inverter on the same lug?

Example:
1712327398224.png



Here's the actual transfer switch (with generator input which will be swapped for battery bank / inverter)


1712327113271.png
 
Alrighty thanks, i'll skip that then.

When I run the 4 hots (2 from each inverter for split phase) to my transfer switch, Do they go to separate LINE lugs, or do stack each hot from the same inverter on the same lug?

Example:
View attachment 207254
Neither of those.
L1 (black) from each, goes to the left side.
L2 (red) from each, goes to the right side.

Note: you can't put two conductors in the same lug, unless the lug is rated for it. (If you are getting this inspected)
 
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