Trying to match Solar Panels to Inverter

[Solarmadness]

Will this Inverter Charger handle these solar panels in a 3 series 3 parallel configuration.9 panels total.Thanks for your help.Pat

Sungold 10000W 24V SPLIT PHASE PURE SINE WAVE SOLAR INVERTER CHARGER.​

Solar Panels Mission MSE345SX5T 345 watt

 

[timselectric]

What is the VOC rating of the panels and inverter.

 

[Solarmadness]

VOC solar panel 41.1v
Solar input 30-145vdc

 

[Solarmadness]

What is the VOC rating of the panels and inverter.

Voc solar panel 41.1v
Solar input 30-145vdc max

 

[MisterSandals]

An array with 3S3P will work just fine (123.3Voc plenty of headroom for temp compensation).

Combining 3 strings will produce 3x the string amps so your wiring and fusing will need to handle that.

How many watts or Isc are your panels?

 

[Solarmadness]

An array with 3S3P will work just fine (123.3Voc plenty of headroom for temp compensation).

Combining 3 strings will produce 3x the string amps so your wiring and fusing will need to handle that.

How many watts or Isc are your panels?

ISC 10.92amps or345 watts

 

[timselectric]

Voc solar panel 41.1v
Solar input 30-145vdc max

Should be fine. As long as you don't see very cold temperatures in winter.

 

[MisterSandals]

ISC 10.92amps

So your 3S3P array will combine to produce nearly 33A so you'll need a combiner box because most MC4 3:1 connectors are rated to 30A.
The combiner box will have the fusing and perhaps other functionality that make for a complete solution.

Not recommending a brand or particular product but something like this that handles 3x 11A strings:

https://www.amazon.com/weideer-Combiner-Lightning-Waterproof-Combination/dp/B09KC6MFVS/

 

[Solarmadness]

So your 3S3P array will combine to produce nearly 33A so you'll need a combiner box because most MC4 3:1 connectors are rated to 30A.
The combiner box will have the fusing and perhaps other functionality that make for a complete solution.

Not recommending a brand or particular product but something like this that handles 3x 11A strings:

https://www.amazon.com/weideer-Combiner-Lightning-Waterproof-Combination/dp/B09KC6MFVS/

 

[Solarmadness]

I am starting to see how this is going to play out now.Thanks for all of you advice.3-8 gauge wire back to inverter from combiner box at 40 ft length. Thanks again for your help.

 

[timselectric]

I am starting to see how this is going to play out now.Thanks for all of you advice.3-8 gauge wire back to inverter from combiner box at 40 ft length. Thanks again for your help.

The ground conductor can be 12 gauge (I would use 10 gauge). So, just 2 x 8 gauge.

 

[740GLE]

10k at 24v? Hard pass jump up to 48v.

 

[Solarmadness]

The ground conductor can be 12 gauge (I would use 10 gauge). So, just 2 x 8 gauge.

Would an 8/3 SO cord running thru attic to garage be safe.This would be my Home Run from combiner box to Inverter controller.

 

[Solarmadness]

10k at 24v? Hard pass jump up to 48v.

Was stuck on the fence Should of went 48v...more room for expansion.

 

[timselectric]

Would an 8/3 SO cord running thru attic to garage be safe.This would be my Home Run from combiner box to Inverter controller.

No
PV conductors must be in metal conduit, inside of buildings.
EMT, IMC, GRC, FLEXIBLE CONDUIT (GREENFIELD), or MC.
Those are the options that I can think of right now.

 

[Solarmadness]

No
PV conductors must be in metal conduit, inside of buildings.

Ok great Thanks was not sure of the code on PV wiring.

 

[MisterSandals]

PV conductors must be in metal conduit, inside of buildings.

The metal conduit needs to be sized right too, to meet code. Heat dissipation i believe.

 

[timselectric]

The metal conduit needs to be sized right too, to meet code. Heat dissipation i believe.

Yes, and de-rating comes into play.
Because these circuits are considered continuous duty. (Running for 3 hrs or more)