Dunndeal
SparksMayFly
I’m having a brain fart. Would some one show me a picture of a 3S1p configuration’s of PV panels. I want to be sure I’m doing it right. Thanks in advance
3s1p
- Thread starter Dunndeal
- Start date
MisterSandals
Participation Medalist
You have 3 panels, i will call them A, B and C.
Take the + of A and connect it to the - of B. Take the + of B and connect it to the - of C.
Done. Grab a beer and post a pic.
Take the + of A and connect it to the - of B. Take the + of B and connect it to the - of C.
Done. Grab a beer and post a pic.
acdoctor
Solar Enthusiast
Here is a 4S1P
Dunndeal
SparksMayFly
acdoctor you’ve help me again. Thanks very much. I must be confused about 3S1p. I thought 3S1p meant the in 3 series and 1p = 4 panels more research on my part
Dunndeal
SparksMayFly
I’ll have 3 in series and 1 in parallel.
timselectric
If I can do it, you can do it.
- Joined
- Feb 5, 2022
- Messages
- 18,812
3s1p = 3 panels in series and 1 string in parallel.
1 in parallel, just means 1 string only.
1 in parallel, just means 1 string only.
How many panels do you actually have? 3 or 4?
Remember that 3S1P is normally written as 3S.
The picture posted by @acdoctor is 4S (or 4S1P - same thing). If you have 3 panels and you want them in series then it is the same as the picture but with one less panel. It is exactly what @MisterSandals described.
If you actually have 4 panels then you have 3 options: 4S, 4P, or 2S2P.
Dunndeal
SparksMayFly
I’ve got 4 panels. Thanks for your help
acdoctor
Solar Enthusiast
I didn’t mean to confuse I could not quickly find a picture of 3S that’s a 4S
OK then, as I said, you have 3 options for arranging 4 panels. The choice depends largely on the full specs of the panels and your solar charge controller. It can also depend on potential shading issues and battery/system voltage.
Post links to the panel specs and your charge controller. Tell us how/where the panels will be mounted, and your system voltage.
Generally, 3s1p means a single set of panels 3 in total.
acdoctor
Solar Enthusiast
Dunndeal
SparksMayFly
Your suggestion is appreciated. But that would over amp the system and I would be over voltage. I have four panels. I want to hook 3 in series and 1 panel in parallel. I have a48 volts system
That's not a valid setup and not one of the 3 possible options I showed.
Please post the specs I requested and we can help you get this setup correctly.
Dunndeal
SparksMayFly
Yes sir. I’ve purchased a growatt 3500 inverter 48 volts. With four panels in series I’m over voltage. With 2 in series and 2 parallel. I’m over amped. With the 4 panels, I want 3 panels in series and 1 panel in parallel. That configuration will be just right as for the V and amps for my inverter. Would that be
acdoctor
Solar Enthusiast
That doesn’t sound correct. I have a 3000 watt growatt it can take 145 VOC and 2000 watts of panels. What model do you have. Or a link to the manual. You may be making it harder than necessary.
Dunndeal
SparksMayFly
Inverter growatt SPF 3500 ES, has a limit of pv voltage of 450 volts. Max Amperage input is 18a. Max charge current 80a. 4 pv panels. 305 watts each
growatt spf 3500 ES. I have 4 pv panels. 305 watts, max voltage 36.8, current 8.30 amps, VOC 45.6.
Dunndeal
SparksMayFly
450 VOC
Dunndeal
SparksMayFly
The problem is my lack of know how.
But I’m trying. Thanks to the forum I might get this correct