inverter power cables cca or ofc

[Bigfoot2005]

What type of power cables can be used for battery connections to 1500 watt inverter?

CCA or OFC

[time2roll]

Now look at the graph at the 200% level. Close to a minute to open. That is 400 amps close to a minute before that 200 amp class T opens. Your call.

Search for ANL and you will see much faster open at 200%.

[Bigfoot2005]

time2roll wrote:
200 class T is fine. I would use 150 amp. That is all I am saying.

GP also say #2 wire and 2/0 is getting installed.



https://www.bluesea.com/products/5112/Fuse_A3T___Class_T_110_Amp

Ampacity of #2 with 105C insulation is 210 amps
Ampacity of 2/0 with 105C is 330 amps

http://www.genuinedealz.com/voltage-drop-calculator

They suggested 2/0 wire to me if I am going to do a longer run of wire as I might have too to avoid a voltage drop

[time2roll]

200 class T is fine. I would use 150 amp. That is all I am saying.

GP also say #2 wire and 2/0 is getting installed.



https://www.bluesea.com/products/5112/Fuse_A3T___Class_T_110_Amp

Ampacity of #2 with 105C insulation is 210 amps
Ampacity of 2/0 with 105C is 330 amps

http://www.genuinedealz.com/voltage-drop-calculator

[Bigfoot2005]

time2roll wrote:
Class-T will pass 2x rating for 60 seconds. That 1500 would have to draw 300 amps for a full minute to open. Not going to happen during normal operation. Check Blue-Sea graph.

Not sure what you are saying. The manufacturer recommends the Class T fuse rating of 200 amps for their 1500 watt inverter.

1100 – 1800W inverters 200 amp #2 AWG

[time2roll]

Class-T will pass 2x rating for 60 seconds. That 1500 would have to draw 300 amps for a full minute to open. Not going to happen during normal operation. Check Blue-Sea graph.

[MEXICOWANDERER]

Then so be it. They are the Supreme Court. Cheap inverters have little or no reserve punch and the manufacturer knows their product. 🙂

[Bigfoot2005]

MEXICOWANDERER wrote:
Too tight of protection may blow a fuse. How? Inverters are rated for overcurrent to start a load that draws a lot more than nameplate design. My recommendation if to check with the manufacturer or vendor.

My Trace is rated to start stuff to nameplate rating times eight.

Manufacturer recommends 200 amp T fuse for the 1500 watt inverter

[MEXICOWANDERER]

Too tight of protection may blow a fuse. How? Inverters are rated for overcurrent to start a load that draws a lot more than nameplate design. My recommendation if to check with the manufacturer or vendor.

My Trace is rated to start stuff to nameplate rating times eight.

[time2roll]

200 amp ANL is fine. I would go a little tighter with Class-T with 150 amps.

[ktmrfs]

GordonThree wrote:
Spend a bit more and get a class T fuse and holder. Look at the short circuit current of your battery bank and the interrupt capability of the fuse.

x2. and mount it as close to the battery as possible.

[GordonThree]

Spend a bit more and get a class T fuse and holder. Look at the short circuit current of your battery bank and the interrupt capability of the fuse.

[Bigfoot2005]

Thanks to everyone for your help and input.

I am also wondering what sort of fuse do you guys use? I am use to installing car stereos and using ANL inline fuse. Will these also work with for inverter protection? Looking at a 200 amp inline fuse with 2/0 welding cable.

[time2roll]

See manual p23
(note copper wire only)


The distance between the battery bank and the GP-ISW should be as short as possible to achieve maximum efficiency and to reduce fire hazards. The size of the cable should be thick enough to limit the voltage drop to less than 2% when carrying the maximum input current to prevent frequent low-input voltage warnings and shutdown. Only use high quality copper wire.
For greater efficiency, the cables should be as short as possible. The combined cable length should be no more than 10ft (3m). Keeping your wire runs as short as possible helps to prevent: low voltage shutdowns and nuisance tripping of the DC breaker because of increased current
draw. The table below shows the recommended DC cable size, fuses/circuit breakers and DC grounding cable sizes for the GP-ISW (Note: these values are correct for cables in free air, not conduit)
Model Wire AWG Inline Fuse / Circuit Breaker

GP-ISW1500-12 #2 F-200A

[pianotuna]

No aluminum wire. 15 feet may need 1/0 wire.

Move the inverter closer.