My solar panels is good or bad?

[YukIi]

I have 2 solar panels with d same spec's
120w x2
SCC display
Pv-33.1
Current is 8.06

I get 265.793 watts i worry if this good or not.?

Respect newbies..

 

[yodamota]

looks good. apparently your panels are outputting more than they are rated for. Which will happen when the panels are colder than 25*C(77*F)

 

[YukIi]

Thnk for the advice i really appreciate

 

[YukIi]

looks good. apparently your panels are outputting more than they are rated for. Which will happen when the panels are colder than 25*C(77*F)

May I ask.
This is My first time connect my solar panel in Series.

Last day I connect this in parallel connection but the charging current is disappearing..
But in series is goes fine.?

Can you figure out the problem ?

 

[YukIi]

I have 2 solar panels with d same spec's
120w x2
SCC display
Pv-33.1
Current is 8.06

I get 265.793 watts i worry if this good or not.?

Respect newbies..

I harvest almost 300 watts to my
120wx2 solar panel
My ?

Newbies here.

 

[Whinny]

You are using solar panel voltage instead of battery voltage in your calculation....

 

[YukIi]

What are you talking about. Can you explain?

 

[MisterSandals]

This looks like charging amps based on the arrow from panel to battery.


So if you are charging at 14V...
14V x 9.19A = 128.6W

The 32.2V pic that just shows a panel is likely array voltage.

What is your panel Vmp and Imp numbers on the label. In full sun, these should be your output (in reality, 80% is closer to reality).

 

[YukIi]

This looks like charging amps based on the arrow from panel to battery.
View attachment 175888

So if you are charging at 14V...
14V x 9.19A = 128.6W

The 32.2V pic that just shows a panel is likely array voltage.

What is your panel Vmp and Imp numbers on the label. In full sun, these should be your output (in reality, 80% is closer to reali

120watts x2 = 240
But I got More
Vmp - 32.6v
Imp- 11.81
Total of 385.006
I think this is the peck wattage of my solar panels.

About your message i understand now thank you very much ? i really appreciate.

 

[MisterSandals]

Your panels says Vmp = 18V and Imp = 6.67

2 in series, add the voltages:
(18V + 18V) x 6.67A = 240W

The sign that its under producing, your array voltage is 32.2V
Lets back out array amps.

14V x 9.19A = 128.6W

128.6W / 32.2V = 4A from your array

 

[mikefitz]

I harvest almost 300 watts to my
120wx2 solar panel

No you don't.

Your confusion is reading the display. The volts reading of 32.3 is the panel volts of two panels in series at the maximum power point.
The reading of 9.19 amps is the current into the battery after conversion by the MPPT controller. This current is not panel current. This is battery charge current at a battery voltage of perhaps 13.8 volts.( lithium) or 14.4 volts (lead)

13.8 x 9.19 = 127 watts. 14.4 x 9.19 = 132 watts

With your two panels in series the maximum current, from the specification is 6.67 amps, so the reading of 9.19 amps is impossible.

Conclusion, the display of current is battery current, not panel current.

Mike

 

[YukIi]

No you don't.

Your confusion is reading the display. The volts reading of 32.3 is the panel volts of two panels in series at the maximum power point.
The reading of 9.19 amps is the current into the battery after conversion by the MPPT controller. This current is not panel current. This is battery charge current at a battery voltage of perhaps 13.8 volts.( lithium) or 14.4 volts (lead)

13.8 x 9.19 = 127 watts. 14.4 x 9.19 = 132 watts

With your two panels in series the maximum current, from the specification is 6.67 amps, so the reading of 9.19 amps is impossible.

Conclusion, the display of current is battery current, not panel current.

Mike

Yuh. I understand that..
My wrong is the voltage i use to calculate is ok my solar panel.
But my Total harvest going to my battery is almost 132 watts

Lifepo4 battery - 14.4v?

 

[MisterSandals]

Lifepo4 battery - 14.4v?

What battery do you have? Is that the manufacturer's recommended charge voltage?

I charge to a lower voltage (13.88V) for a gentle 99% charge.

 

[YukIi]

I have used lifepo 4 diy
I put the parameters to lithium Li.

Do you know parameters for my lifepo4..

 

[MisterSandals]

I put the parameters to lithium Li.

This sounds like a preset charge profile.

Is it possible that you can post your charge settings so we can evaluate them.
Or if you have a link to your SRNE manual, we can probably see the settings for the lithium profile.

 

[YukIi]

This sounds like a preset charge profile.

Is it possible that you can post your charge settings so we can evaluate them.
Or if you have a link to your SRNE manual, we can probably see the settings for the lithium profile.

I Use
( Li )

 

[MisterSandals]

I think you will be better off creating a user defined charge profile.

Its explained here in posts 5-7.

My SRNE mppt drops to 2 watts after 10 seconds

Hi all, I'm new to the whole solar charging, powerwalls, off-grid electricity world and I love it so far. So my problem is that I recently bought an SRNE ML230-40, 30a mppt charge controller with bluetooth module that I hooked up to a 100 ah Lifepo4 battery. I also hooked up the charge...

diysolarforum.com

 

[YukIi]

I think you will be better off creating a user defined charge profile.

Its explained here in posts 5-7.

My SRNE mppt drops to 2 watts after 10 seconds

Hi all, I'm new to the whole solar charging, powerwalls, off-grid electricity world and I love it so far. So my problem is that I recently bought an SRNE ML230-40, 30a mppt charge controller with bluetooth module that I hooked up to a 100 ah Lifepo4 battery. I also hooked up the charge...

diysolarforum.com

Thank you very much