Ok. Not size for the 120A DC output listed?
Solar configuration
- Thread starter kje
- Start date
sunshine_eggo
Happy Breffast!
I see.
So for sizing for the 182.2A DC input listed:
Is it correct that 4awg (25mm2) 7feet wire can handle 150-200A?
And together with 4awg wire I should use a 180A circuit breaker?
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sunshine_eggo
Happy Breffast!
Ok, great. Thank you!
Where can I find a reliable wire rating chart? Is this reliable?
So wire size for 182,2A is 00awg (67,4mm2) wire?
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sunshine_eggo
Happy Breffast!
Wire ratings are primarily influenced by temperature - the rating of the insulation, ambient temperature and if it's in any kind of conduit.
These UL battery cable ratings are a good place to start. Not endorsing this site as a wire source, but it's a good reference:
www.batterycablesusa.com
These UL battery cable ratings are a good place to start. Not endorsing this site as a wire source, but it's a good reference:
Custom Battery Cables with Ends - Flexible UL Listed Wire
Ok thank you.Wire ratings are primarily influenced by temperature - the rating of the insulation, ambient temperature and if it's in any kind of conduit.
These UL battery cable ratings are a good place to start. Not endorsing this site as a wire source, but it's a good reference:
Custom Battery Cables with Ends - Flexible UL Listed Wire
So according to the UL battery cable ratings I can use 2awg cable for 178A?
Is this correct?
Or should I go up to 1awg rated for 208A?
Would it be feasible with a 200A breaker og should it be exact 222,5A with a 2awg wire? How exact should the numbers be?
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sunshine_eggo
Happy Breffast!
If they're not in the engine compartment (where it's hot), 210A for 2awg is do-able.
The other consideration is wire length. Longer wire has more resistance, and may be insufficient due to voltage drop:
Voltage Drop Calculator
This free voltage drop calculator estimates the voltage drop of an electrical circuit based on the wire size, distance, and anticipated load current.
www.calculator.net
This indicates that 48V, 182.2A, 2awg conductors of 10 feet each will results in a voltage drop of 1.19% - should be fine.
Sorry, 1.25X and round up to the next available size. You'd be looking for 225 or 250.
Ok, thanks.If they're not in the engine compartment (where it's hot), 210A for 2awg is do-able.
The other consideration is wire length. Longer wire has more resistance, and may be insufficient due to voltage drop:
Voltage Drop Calculator
This free voltage drop calculator estimates the voltage drop of an electrical circuit based on the wire size, distance, and anticipated load current.
This indicates that 48V, 182.2A, 2awg conductors of 10 feet each will results in a voltage drop of 1.19% - should be fine.
Sorry, 1.25X and round up to the next available size. You'd be looking for 225 or 250.
Why should breaker be 1.25 X wire rating?
sunshine_eggo
Happy Breffast!
Won't that be danger for the wire?
Can I use a 16A 1000V TOMZN breaker between my panels and Inverter as a on/off switch?
I have 6S 230w panels. 230x6=1380w
Vmp=30v so 1380/(30x6) = 1380/180=7.66A
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sunshine_eggo
Happy Breffast!
No. Wire ratings are conservative AND over-current events are rarely 25% too high. They are usually short circuits due to component/user failure.
6S does not require a fuse or breaker. If the breaker is > expected amps and rated to break peak DC voltage, it's fine to install. Some breakers aren't rated for repeated on/off.
