I'm also curious about the science behind over paneling.
My SCC can accept 1300 W when on a 12 volt battery bank. My understanding is that if I go over that it simply limits it and only uses what it needs. As long as I stay under the 100 amp 150 volt SCC limit, there is not a problem.
First...
Yes. 12v
The 80-100a is what the SCC is pushing to the batteries.
I'm not sure what the inverter is pulling. I assumed it just does it's own thing with the 12v bank.
I'm curious to see. I'll let you know what that reading is.
Okay Fellas.
Here are the accurate specs. I was a bit off. :( I apologize for the bad lighting in the pics. They system is in the basement of my off grid cabin. This is all run similarly to the system that was here when I bought the place. I have simply been upgrading components. Once I get the...
Alright. I have confirmed that the panels are good. They are producing at about 70%
I replaced the audio cable and another undersized wire I found. (In retrospect, I should have redone everything instead of keeping the old wiring)
As of now, I have two more questions.
1. I have a 6 AWG wire...
I need help diagnosing my system.
It doesn't seem to be putting out the power it should.
System is as follows:
-2,600W solar array ( 8 panels each are 325w-10a-40v panels)
-Renogy Rover 100A MPPT Charge controller
- 12v 600ah lithium battery bank
- renogy 2000W inverter
Wiring is good...
Thank you everyone for your helpful replies.
I'm seeing several places in this thread a mention to an ISC of 40a for the SCC.
The SCC I am using is the Renogy 100a MPPT
The specs are as follows:
-Nominal Voltage: 12V/24V/36V/48V
- Rated Charge Current:100A
-Max. PV Input Power: 1300W/12V...
Their volt reading is always fine, but the amps always seems low.
Regarding the wiring, what would you suggest? For instance, on the PV run?
There doesn't seem to be a safe way to size up from 10AWG. But sizing charts say I need larger that 10AWG if I want to stay under 3% loss.
For example. My...
Yes. I live in the UP of Michigan so I need to be over paneled to survive the darker winters.
I would agree with you, however, even at peak sun and depleted bank, I never see 1400w.
I have four sets of two panels. Each set is wired is series and the four sets are wired in parallel. That final positive and negative go through a fuse breaker and then directly into the charge controller.
My system:
-1300W Trina solar array (4x325w panels) 40v/isc of 10
-Renogy Rover 100A MPPT, rated at 100A/150V max pv input. Also 1200w at 12v max pv input.
-12v 300ah battery bank
-Renogy 2000W inverter
I am trying to increase my solar array. I can easily wire 8 x 325w panel in series...
I definitely understand how having the wrong charge controller may be affecting performance. But that wouldn't affect performance at the panels would it? When I take readings at the panels the amps still seem super low.
Thanks for that advice! I will do those tests tomorrow.
My understanding about over paneling from talking with other members on this forum is that as long as I do not exceed the Max amps and voltage allowed by the charge controller I am okay.(200a and 150v)
I currently have the charge...
Okay, I understand that.
If I separated a single panel and unhooked it and tested it with a multimeter at peak sun, should I expect to see around 40 volts and 10 amps as the sticker says?
I just did a test like that today and I am getting 40 volts and 2 amps. I have tested each of my eight...
Okay. I will test the panels.
Yes that is audio wire. I had forgotten about that. I have the correct stuff. I'll swap it out.
By tapping, are you referring to my little clamp on the left positive terminal? That is from an AC charger that I am not running at the moment.
Thanks for the help. That clarifies a ton!
When I upgraded the system, I was going to upgrade to a 24 volt battery bank.
I am currently using 2 12v 300ah lithium batteries.
My understanding was that wiring them in series for a 24 volt system would save me when it comes to cost on charge...