2000W 24v Questions, about how far the panels can be wired from without loss and a few more

[dickrock]

Greetings from Ct.
Please excuse my ignorance, I am learning about 24v solar systems on the fly here and if its a stupid question im asking, please be kind,I learn quick, and I promise not to waste your time.,
I am building a 3000w 24v systemMy assembly as in the below picture will be permanently mounted in an out building with a Moveable, storeable, unplugable, 1600w 24v array built on a trailer. I have more than one question and would really appreciate any input
To start, Thank you Will,I based this off of your system here.
I bought everything you recommended (including your book , in the mail still)except I went with a different inverter 3000w
and I am using Four 31series 12v RV batteries in parallel/series.
I have acquired 9 Identical solar panels, I could use some clarification here, What I believe I have are 200watt panes each containing Two 100w 12v arrays that are currently bugged together to make 24v. All 9 panels are set like this, they were sold to me as 24 volt panels. looks legit to me, please let me know if im wrong.

I have the fixins to re wire the leads on all 9 of them with 10awg and mc4 connectors I have 3 way connectors to run them in series. The old leads are 12ga and have some kind of obsolete connector on them. Im not a fan of those yellow crimpies either.

I am going to put 8 of them(because thats all that will fit) on a tilt, snowmobile trailer That I can then move when needed. The roof of the house is NOT an option. (sunlight is not optimal) but the front of my garage IS. On the trailer i could move it around as the available light changes throughout the year

(1) Am I correct in calling this 1600watts of solar panels? when set to 24v and run in series? 100w 12v x2 per panel = 200w each set to 24v. x 8 panels =1600 watts right? I have no Idea how to calculate the output beyond that, Im ignant. Please educate me. the spec of the panel is in the above left picture. That x 8 is what ill have. what will I have?

(2)How long of a run am I allowed to have between the array and the charger? Is 8AWG big enough? I HAVE 150' of red and black burial cable same from your parts list, Im not burying it, its going to be laid out on the ground between the array and the building. It HAS to be, so I can put the trailer away before the asteroids hit.

(2a) Should I use the 8awg in a flexible conduit?

(3) The array needs to be able to be unplugged and put away when not in use, What kind of quick disconnect electrical connectors, isolation switches etc.. should I use for that?What about a marine/rv shore power cable to connect building to array? I have a 50 footer...

(4) the inverter has 3 lugs (black yellow red)to hard wire a 110v ac circuit into it. Are there limitations as to how long THAT wire can be? Say if I ran 60' of 12/2 underground(thru existing conduit) into my house to a four GFI outlet gang box where I could plug in things from there?

Ill stop here.
I should have most maybe all of what I need and have assembled NONE of it yet. My book isnt here yet and im not doing this blind. I hope that I am asking these questions intelligently... I look forward to your replies. Thank you
-dickrock

 

[snoobler]

(1) you have 9*110W = 990W of panels. Setting to 12V or 24V only affects voltage and current. 24V has 1/2 current as 12V.

(2) and (4) - Depends on voltage, current, wire gauge and distance: https://www.calculator.net/voltage-drop-calculator.html

(rest of questions) No opinion, don't know or too tired to think.

 

[JoeHam]

A few thoughts.

Most PV wire is UV resistant and you should not need conduit unless rodents in you area find it tasty. ?

Please confirm that what you have is UV rated.

For a longer run (150 ft is definitely doable) you will want as high a voltage as your Solar Charge Controller can handle. Allow for temperature correction. Please provide a link to your SCC or list the specs.

Until you know the voltage you cannot calculate loss but I bet 8 AWG will be more than enough.

When you want to store the panel system just disconnect the MC4 connectors.

For AC loss at 60 feet use the calculator snoobler provided.

 

[dickrock]

All right! Thank you Both.
The wire has printed on it; #8 AWG TYPE XLP RHW-2 600V AND 1000V OR USE-2 600V (UL) SUNLIGHT RESISTANT

MPPT is a Epever 4215BN
rated charge current 40 A
Rated Charge Power 520W/12v 1040w/24v
Max. PV Array power 1560w/12v 3120w/24v
Max PV open circut voltage 150v@min. operating environment temp 138 volt@75.2'f

it is the one in the top pic,

Also with 8 of those panels that I have what is my voltage going to be? How do I calculate that?

 

[SolarQueen]

1) Watts = volts x amps. So if you are adding multiple panel's wattages, you don't need to include volts in the equation, it's already there. Just add the watts. 110W x 8 = 880W.
2) Your panels have a 32Vmp rating, so 2 in series is 64V at 3.36Imp x 4 parallel strings = 13.44A. Per the voltage drop calculator, you can go 75' with #8 wire and stay under the recommended 2% voltage drop.
3) I would put it in some sort of protection. Squirrels find wire very tasty.
4) 3000W inverter / 120VAC = 25A. According to the calculator, you can go 30' of #12 and keep it under 2% drop.

 

[SolarQueen]

880W / 24V output to battery bank = 36A out of charge controller. The 40A controller is perfect.

 

[dickrock]

880W / 24V output to battery bank = 36A out of charge controller. The 40A controller is perfect.

Thank you very much Solar Queen!

 

[snoobler]

I see 9 panels in the OP's post. Is it 8 or 9? Either way, they're 110W each regardless of whether they're configured for 12 or 24V. If you have 9, you need to do a 3S3P configuration. This will raise panel voltage and thus make your voltage drop even more favorable.

 

[dickrock]

I see 9 panels in the OP's post. Is it 8 or 9? Either way, they're 110W each regardless of whether they're configured for 12 or 24V. If you have 9, you need to do a 3S3P configuration. This will raise panel voltage and thus make your voltage drop even more favorable.

I made some confusion in the OP I will have an array of 8 110w panels. Same advice on config?

 

[snoobler]

No. SQ gave you the right config. 2S4P.