Please check out my panel math

[Dskvid]

hello I have a growatt 5000es system and currently have a 6x 370w panel array, I’m adding an additional 6 of the same panels soon. I was thinking of running them as either 6s2p or maybe a 8 panel series and a 4 panels series because of mounts,
Then parallel down 100’ of 10 gage wire that is in current use,

Growatt spec:

• Maximum PV Array Power: 6000W.
• MPPT Range @ Operating Voltage: 120VDC – 430VDC.
• Maximum PV Array Open Circuit Voltage: 450vDC.
• Maximum Solar Charge Current: 100 amps

Panel spec
Current 6 panel array series
370watt =2200watts
VOC 41= 246Volt
Amps 11.42

So in a 6s2p it would be 4400 watts at 22.84 amps for all 12 panels going done the 10gage wires for 100’ Which I believe ok as I’m not adding the voltage past the 246 volts correct per string? Would there be a problem if a did unequal strings of a 8 and a 4 for 12 total panels? Or is there a different config I need or should consider? Thanks for reading

 

[TomC4306]

Looks good to me.
A little over 2% voltage drop.
You'll lose about 5 volts across The wire.

 

[yodamota]

What is the VMP of the panels? At VOC there is no current. VMP is what you want to calcuate voltage drop based on.

Also go with 6s 2p

 

[Mattb4]

6S2P looks OK but your proposed 8S string and paralleled to 4S string will not work out. They would have to be separate arrays connected to their own SCC. Plus the voltage drop for the 4S would need looking up at 100ft.

 

[TomC4306]

What is the VMP of the panels? At VOC there is no current. VMP is what you want to calcuate voltage drop based on.

Also go with 6s 2p

Good catch.
But even at 210 volts, voltage drop is under 3%

 

[TomC4306]

Plus the voltage drop for the 4S would need looking up at 100f

And be careful to make minimum charger voltage

 

[Dskvid]

The VMP is 34.4