Gauge of wire needed?

[RStone13]

Controller 24v input Max 60a,150v,2250w
Panels 4s2p output 146.9v,17.12a,1880w
Distance of run 300 ft ,buried in ground in New England
What gauge copper wire do I need? 8awg?
Thanks in advance

 

[MisterSandals]

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

Shoot for 3% loss or less.

You have 2 different wire runs so calculate each separately with voltage, distance and amps.

 

[Forbisher]

Controller input Max 60a,150v,

2250w Panels 4s2p output

146.9v, 17.12a,1880w

Distance of run 300 ft ,buried in ground in New England
What gauge copper wire do I need?
Thanks in advance

Plug your numbers in this voltage drop calculator.
Use Vmp not Voc.

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

 

[Forbisher]

Controller input Max 60a,150v,2250w
Panels 4s2p output 146.9v,17.12a,1880w

4S is 36.7V x 4 panels is 146V on a 150V max SCC is too much when adjusted for your cold temps that will raise the Volts to 164.

What brand and model is the SCC??

8 panels so you can only connect 2S4P which changes the voltage drop.

What voltage is your battery?

 

[RStone13]

4S is 36.7V x 4 panels is 146V on a 150V max SCC is too much when adjusted for your cold temps that will raise the Volts to 164.

What brand and model is the SCC??

8 panels so you can only connect 2S4P which changes the voltage drop.

What voltage is your battery?

24v and why? only 2in series that would increase amperage and require much larger cable

 

[MisterSandals]

8 panels so you can only connect 2S4P which changes the voltage drop.

9 panels would be a happy medium with 3S3P, if you have access and room for 1 more panel.

 

[Forbisher]

24v

26V x 60A is 1560w

8 235w panels is 1880w

Where did you get 2250w from??

What brand and model is the SCC?
What brand and model is the SCC?

 

[RStone13]

26V x 60A is 1560w

8 235w panels is 1880w

Where did you get 2250w from??

What brand and model is the SCC?
What brand and model is the SCC?

epever input parameters 60a 150v 2250 w at 24v system

 

[Forbisher]

epever input parameters 60a 150v 2250 w

60A is Output
150V is max volts input.
2250w is that at 24V and Max production.

Can you get a 9th panel coz 2S4P is gonna need large wire over 300 feet one way.

 

[RStone13]

9 panels would be a happy medium with 3S3P, if you have access and room for 1 more panel.

that would increase amps and require larger cable? would it not?

 

[Forbisher]

that would increase amps and require larger cable? would it not?

No.
3S3P would decrease amps and raise voltage vs 2S4P for smaller gauge wire.

300 feet is a lot. 600 feet round trip.

Run the calculator for both 3S3P and 2S4P and compare.

 

[RStone13]

60A is Output
150V is max volts input.
2250w is that at 24V and Max production.

Can you get a 9th panel coz 2S4P is gonna need large wire over 300 feet one way.

these are epever input parameters

 

[RStone13]

No.
3S3P would decrease amps and raise voltage vs 2S4P for smaller gauge wire.

300 feet is a lot. 600 feet round trip.

Run the calculator for both 3S3P and 2S4P and compare.

why not 4s2p

 

[RStone13]

Shoot for 3% loss or less.

You have 2 different wire runs so calculate each separately with voltage, distance and amps.

2 different runs?

 

[MisterSandals]

.

2 different runs?

Panels to SCC and SCC to battery/grid/load.

 

[Forbisher]

why not 4s2p

Because as I already posted its way over the 150V MAX input of your Epever 60A when you adjust for the cold temps in New England.
Did you read what I posted?
This.
4S is 36.7Voc x 4 panels is 146V on a 150V max SCC is too much when adjusted for your cold temps that will raise the Volts to 164.

 

[RStone13]

.

Panels to SCC and SCC to battery/grid/load.

Thank you. This is existing system. Controller to battery is already done. Just thinking of building bigger array in new location. And I am trying to find out what size wire I need to run to controller

 

[RStone13]

Because as I already posted its way over the 150V MAX input of your Epever 60A when you adjust for the cold temps in New England.
Did you read what I posted?
This.
4S is 36.7Voc x 4 panels is 146V on a 150V max SCC is too much when adjusted for your cold temps that will raise the Volts to 164.

Thank You & sorry i did not see that. Which post# was that in I looked back and still didn't see it. Also 164 v is if all panels at 100% correct. I don't think I have seen any array run at 100% it's only a little over 150v max do you really think I'll ever hit it?

 

[Forbisher]

Thank You & sorry i did not see that. Which post# was that in I looked back and still didn't see it. Also 164 v is if all panels at 100% correct. I don't think I have seen any array run at 100% it's only a little over 150v max do you really think I'll ever hit it?

How cold does it get at your location?
You are reading Vmp not Voc.
Yes one cold sunny morning your voltage will be way over 150V and maybe smoke your Epever.

POST #4 and you Quoted it.

 

[RStone13]

How cold does it get at your location?
You are reading Vmp not Voc.
Yes one cold sunny morning your voltage will be way over 150V and maybe smoke your Epever.

POST #4 and you Quoted it.

Wow your correct #4 I must be blind. I didn't catch that. Buried should be around 32 degrees (Frozen ground) 146v is at panels, voltage drop calculator say 139.89 at controller not factoring the cold. Under 150v all good? I didn't know which # to use so I went with higher voltage to be safe OCV

​