Diagram for 5 panels 12V

[joeExotic]

I want to add one more 100W panel to my system. Right now I have four 100W panels in 2S2P with Y branch connectors. I am on 12V and my CC takes 520w max on 12V.

Can someone help me find a diagram to add one more panel. Please? Also, would I need anything extra like replacing the Y branches with something else and fuses? and wire size?

I kind of want to go 24V but I am afraid of burning the charge controller. Online I see a lot of the Renogy Rover 40A Li with burnt CC where the PV wires go into the CC. so that's why I want to just max out the PV on the 12V system.

but man, 24V with 1,000W array does sound super duper nice.

 

[rmaddy]

Adding a 5th panel is difficult since you the only two options with one charge controller is either 5S or 5P. 5S probably gets the voltage too high (but we can't be sure without all of the specs). 5P might be too much current (again, we need the specs). You could use two charge controllers.

Adding two more panels is likely a better option. Then you can so 2S3P or 3S2P. The latter can help with the fact that you are now putting 600W when the max is 520. Aim one string slightly east and the other string slightly west. You'll get less at peak sun but you'll get more charging overall during the course of the day without ever going over the 520W max.

 

[MisterSandals]

I kind of want to go 24V but I am afraid of burning the charge controller. Online I see a lot of the Renogy Rover 40A Li with burnt CC where the PV wires go into the CC. so that's why I want to just max out the PV on the 12V system.

This does not make any sense. Can you post a link to this?

If anything, using 24V battery system would halve the input amps (varies based on array config obviously). You concern seems to be based on wrong information.

Regarding your desire to add a 5th panel, what problem/issue are you trying to solve?

In general, adding a single panel to a 2S2P setup (as previously state) is not feasible or practical.

 

[joeExotic]

From Amazon. I just thought bc the CC can take 520 w max and I have 400 in 2s2p that I can add one more 100w panel. But if that is not possible then ok. Can I add two more 100 w panels?

 

[MisterSandals]

Can I add two more 100 w panels?

Almost certainly.

Are you still wanting 24V system or was that a reaction to those Amazon claims?
People do stupid chit and blame the product to get refunds.
There is zero info about whether it’s a 12V or 24V setup or what their array consisted of.

That being said, Renogy is not exactly top tier stuff.

 

[joeExotic]

Let's do the two extra 100w panels. Total of 600 pv array on a CC maxed for 520w for 12v. If this is safe and okay to do YES PLEASE I want to go down this route.

My Set Up right now:
Four 100W panels in 2S2P, CC 40A, LiFePO4 batteries 3 in parallel 120ah each, and 1,000 pure sine wave inverter.

 

[12VoltInstalls]

24V with 1,000W array does sound super duper nice.

if your volts are beneath the max volts of the SCC you may be able do this. It will leave maybe some watts on the table unless you split your directions SE and SW as suggested (which still leaves some watts on the table just differently, but probably with more daily watts harvested).

FWIW I use 100w panels 2S then paralleled to the SCC. This makes 24V and like your 2S2P because the amps don’t increase in series - 1000W would be rough at 30A nominal input at 24V- though the charge will probably be much better as the panels will probably be supplying high 35-40 volts into the SCC
An mppt controller will output those watts harvested at “38 volts” at the lower voltage you need (13.xV+ or 26.x+V range depending on your battery bank) and higher amps - up to the 40A output of the controller. In my locale I’d try 200W E by SE, 400 SSE, and 400 SW or SWS as that’s going to probably hit you with recovery faster in the AM hours and give you all-day spread watts. Your location you may evaluate differently.

I think 1000W is doable.

Can you use / do you need 1000W? If not,
and you’re someplace like me (northeast) 1000W might make the system sustainable in winter. Maybe giving you 200- or 300W performance LOL

 

[MisterSandals]

If this is safe and okay to do YES PLEASE I want to go down this route.

2S3P is different in that with 3 in parallel, each string needs a fuse (i do not have enough info to guess what amperage fuse).

You will also need to make sure the wiring from the 3P junction to the SCC can handle the added amps (3x panel Isc +25-50%).

 

[joeExotic]

Does this help? It's on my CC. I'm using two 100w Renogy panels and two HQST 100w panels

 

[Bud Martin]

https://www.renogy.com/template/files/Manuals/Rover%20203040%20Manual.pdf

See page 20 over paneling.
The SCC will draw power from the panels up to the maximum charger spec, so if you have let says, 700W panel, the SCC will not going to pull 700W of power, it will be pulling up to 520W from panels. Over panel will allow you to get power through out the day if you face the panels accordingly, and also help to get better power on cloudy days.
There is also write up about over paneling in this forum.