NewStats: 3,261,704 , 8,174,857 topics. Date: Friday, 30 May 2025 at 08:41 AM 5j6c5s

Hello guys, I bought some generic 300W from a Solar shop. 2pcs. It was during raining season so sun wasn't really out that period. I noticed on my 40A HQST MPPT charge controller, the wasnt giving me more than 80W out of the stated 300w. (The MPPT charge controller shows you how many volt and Amps that is coming in from the solar ). So I thought maybe it is because we were in raining season that period. Fast forward to January with full sun, I was getting 105w max per to give 210w out of the supposed 600W I am supposed to get. So I concluded I have bought fake s. Then I decided, this time around I will buy original Jinko 550w from an authorized dealer. So I went straight to Foauni store(one of the authorized dealers in Nigeria). On getting home, I noticed I was only 275w out of the stated 550w too. Foauni does not sell fake products so I know I did not buy fake this time around. So I was wondering, is this the normal way solar s work. Delivering just 50% of their rated wattage even in full bright sun. And even when my battery is very low this is still what I get. I know most times, when batteries are almost full, your MPPT enters float mode and reduces the power coming in from your s but even at low battery percentage, I am still not getting more than 50% of the rated wattage of the Jinko 550w in full bright sunlight. My MPPT controller tracks the wattage all day and tells you at the end of the day the highest wattage the supplied and the highest I got on the 550w is 280W. And my controller does not have any current limiting function. Is this how solar s work in Nigeria because most solar reviews in the US that I watch on Youtube, those s produce atleast 80% of their rated capacity.

There are so many things that affects Solar yield.... orientation, quality of materials, distance etc... I want to point out to you that we are in a dusty weather right now, so your generation might not be out of place as most of us are battling with poor yields due to the weather....

easyyoke:
Hello guys, I bought some generic 300W from a Solar shop. 2pcs. It was during raining season so sun wasn't really out that period. I noticed on my HQST MPPT charge controller, the wasnt giving me more than 80W out of the stated 300w. (The MPPT charge controller shows you how many volt and Amps that is coming in from the solar ). So I thought maybe it is because we were in raining season that period. Fast forward to January with full sun, I was getting 105w max per to give 210w out of the supposed 600W I am supposed to get. So I concluded I have bought fake s. Then I decided, this time around I will buy original Jinko 550w from an authorized dealer. So I went straight to Foauni store(one of the authorized dealers in Nigeria). On getting home, I noticed I was only 275w out of the stated 550w too. Foauni does not sell fake products so I know I did not buy fake this time around. So I was wondering, is this the normal way solar s work. Delivering just 50% of their rated wattage even in full bright sun. And even when my battery is very low this is still what I get. I know most times, when batteries are almost full, your MPPT enters float mode and reduces the power coming in from your s but even at low battery percentage, I am still not getting more than 50% of the rated wattage of the Jinko 550w in full bright sunlight. My MPPT controller tracks the wattage all day and tells you at the end of the day the highest wattage the supplied and the highest I got on the 550w is 280W. Is this how solar s work in Nigeria because most solar reviews in the US that I watch on Youtube, those s produce atleast 80% of their rated capacity

kristien4:
Thanks bro. The thing is i upgraded my s yesterday.. 6pieces 580w solar . 2 s connected in series into 3 places. Thats 2_2_2 in series, all paralled together. I just put it under heavy load. My growatt charge controller displayed 2730watts pv input.. 18amps pv and 90v pv. Its a 48v inverter... 4 pieces 12v LA battery is series..
Each 51v
13amps
580w. Just wanted to be sure its working fine. Under the heavy load, pv input amps stays at 18amps, While batt says 43amps. Was thinking the pv amps would get to 30amps and above or something. I should just believe everything is fine since I'm getting 2730watts from 3480w on heavy load.

What brand is your 580w and where did you get them please. You are getting about 80% yield and that is a very good yield. Your s are original s. I am getting just about half of my own rated wattage. What brand is your please and where did you get them?

Wishing valto a speedy recovery and peace to everyone of us.

TechGeek777:


How long have you been using it, and how many kva?

2kva12v. Using it for about 3 weeks now. Its same make wit sunfield which i have running for about 6mths now in my ogas place. There's a 4.2kva version also in a friend's pharmacy.

Speedy healing Valto.
Subtle reminder we are all humans and its important to do regular health checks. May sickness be far from us and our families.

Well said!! Get well soon Valto

Drgreatone:
Speedy healing Valto.
Subtle reminder we are all humans and its important to do regular health checks. May sickness be far from us and our families.

oloet:
There are so many things that affects Solar yield.... orientation, quality of materials, distance etc... I want to point out to you that we are in a dusty weather right now, so your generation might not be out of place as most of us are battling with poor yields due to the weather....

My Jinko is clean. It is brand new. So no dust on it yet. Just 3days old and I have been taking the reading over the course of three days. Good shinning sunlight. Yet the max I am getting is 270w out of the Jinko 550W

easyyoke:


My Jinko is clean. It is brand new. So no dust on it yet. Just 3days old and I have been taking the reading over the course of three days. Good shinning sunlight. Yet the max I am getting is 270w out of the Jinko 550W

what is the orientation of ur s? Cable distance and type of cc

easyyoke:


My Jinko is clean. It is brand new. So no dust on it yet. Just 3days old and I have been taking the reading over the course of three days. Good shinning sunlight. Yet the max I am getting is 270w out of the Jinko 550W

You didn't state the configuration, also is it 24v or 48v?

Inverter model and CC info is required

JoeSef0:
Thanks to everyone input to my case earlier
I've gone to install an external CC and the series issue has stopped. Everything is fine now.

Just a quick question
How many amps should a 300*3 mono solar s produce at peak Sun?

PWM Controller?
Is this a 24V system?

.

12v

Dam5reey:


PWM Controller?
Is this a 24V system?

Wishing Valto a speedy recovery.

That's nice.

I really like the mppt CC built in the inverter
It shows the wattage and amps the solar is charging at and even shows that of AC input together.
Most inverter out there don't give those details.
Also i noticed it has a fast charging speed for AC.

Drgreatone:

2kva12v. Using it for about 3 weeks now. Its same make wit sunfield which i have running for about 6mths now in my ogas place. There's a 4.2kva version also in a friend's pharmacy.

easyyoke:


My Jinko is clean. It is brand new. So no dust on it yet. Just 3days old and I have been taking the reading over the course of three days. Good shinning sunlight. Yet the max I am getting is 270w out of the Jinko 550W

As I have said, I don't think you have a problem for now, how are the s connected, are they properly oriented, what charge controller are you using?

280ah new Eve cells available for sale in 16 units @145k each

brightk:
what is the orientation of ur s? Cable distance and type of cc

I dont really have much idea about orientation. I have not mounted it on my roof yet. I just placed it outside for now. I want to add one more 550w to it before I put it on the roof. The wire length from the to my MPPT charge controller is 10yards. I am using a 6mm pure copper wire. The current is rated for 13A under loads. To troubleshoot if it was my wire that was the problem, I actually took both my controller and my battery close to the and ran the original wire straight from the to the controller and I was still getting 275, 280W max at peak sunlight. So I dont think it is my wire. It is a single 550w Jinko bought directly from Foauni stores.
Here is the picture of where I placed it. There is no shading at all. Ignore those other two s. Those were the first 300w s I bought. Those ones too are giving me 100W max per . So I have been wondering what is the problem. Lets assume those 300w are fake s, this Jinko 550w is definitely original as Foauni store does not sell fake things.

TechGeek777:

You didn't state the configuration, also is it 24v or 48v?

Inverter model and CC info is required

My system is a 12v system. I have a 200ah LIFEPO4 battery. A 40A HQST MPPT charge controller. I dont think inverter model matters here as I am not drawing any load from the battery while charging. Just purely charging the 200ah battery and I am only getting 275, 280wmax out of the rated 550w Jinko in bright sunlight

oloet:

As I have said, I don't think you have a problem for now, how are the s connected, are they properly oriented, what charge controller are you using?

It is a single 550w . I dont really know much about orientation. I just placed the outside. I am waiting to get one more before putting it on the roof. My controller is a 40A HQST MPPT Charge controller. Can you please shed some light on the orientation. Maybe that could be one of my issues

easyyoke:


It is a single 550w . I dont really know much about orientation. I just placed the outside. I am waiting to get one more before putting it on the roof. My controller is a 40A HQST MPPT Charge controller. Can you please shed some light on the orientation. Maybe that could be one of my issues

I would suggest you get another mppt controller

Penuelseun:
I would suggest you get another mppt controller

Wawu. Not it is not my controller. My Charge controller. Is a quality controller made by Renogy in the US so it is a quality and expensive product ke. This cannot even be right. I have a clamp meter and I have measured the DC Amp directly from the ’s wire as well as the Volt. It is giving me exactly what the MPPT controller is giving with just a little loss. So it is not my controller

JoeSef0:
12v

Hmmm, this is not efficient, 300watts is connected to PWM CC on a 12V system.

JoeSef0:
That's nice.

I really like the mppt CC built in the inverter
It shows the wattage and amps the solar is charging at and even shows that of AC input together.
Most inverter out there don't give those details.
Also i noticed it has a fast charging speed for AC.

Running my top loader washing machine on it as i type. Advantage of the hybrid is u can oversize ur s such that it powers ur load and still charge the battery which u sort of lose wit this pwm charger. I was goin to ask, whats the max input of ur pwm controller used? Looking like u connected ur 900watt to it directly?

easyyoke:


Wawu. My $150 American Charge controller. Wahala. It is made by Renogy in the US so it is a quality and expensive product ke. You think my controller may be the issue?😳😳😳. This cannot even be right. I have a clamp meter and I have measured the DC Amp directly from the ’s wire as well as the Volt. It is giving me exactly what the MPPT controller is giving with just a little loss. So it is not my controller

Whats the specs in of maximum voltage, max input etc?

easyyoke:


I dont really have much idea about orientation. I have not mounted it on my roof yet. I just placed it outside for now. I want to add one more 550w to it before I put it on the roof. The wire length from the to my MPPT charge controller is 10yards. I am using a 6mm pure copper wire. The current is rated for 13A under loads. To troubleshoot if it was my wire that was the problem, I actually took both my controller and my battery close to the and ran the original wire straight from the to the controller and I was still getting 275, 280W max at peak sunlight. So I dont think it is my wire. It is a single 550w Jinko bought directly from Foauni stores.
Here is the picture of where I placed it. There is no shading at all. Ignore those other two s. Those were the first 300w s I bought. Those ones too are giving me 100W max per . So I have been wondering what is the problem. Lets assume those 300w are fake s, this Jinko 550w is definitely original as Foauni store does not sell fake things.

If a Jinko already produced 275W which is 50% of its capacity and your 300w were doing 100w which is 33%...
it means your the Jinko already performed as Top Tier .

Your Charge controller is doing a bad job... Change it to another one..

Also note the Current Weather is very bad!!

easyyoke:


I dont really have much idea about orientation. I have not mounted it on my roof yet. I just placed it outside for now. I want to add one more 550w to it before I put it on the roof. The wire length from the to my MPPT charge controller is 10yards. I am using a 6mm pure copper wire. The current is rated for 13A under loads. To troubleshoot if it was my wire that was the problem, I actually took both my controller and my battery close to the and ran the original wire straight from the to the controller and I was still getting 275, 280W max at peak sunlight. So I dont think it is my wire. It is a single 550w Jinko bought directly from Foauni stores.
Here is the picture of where I placed it. There is no shading at all. Ignore those other two s. Those were the first 300w s I bought. Those ones too are giving me 100W max per . So I have been wondering what is the problem. Lets assume those 300w are fake s, this Jinko 550w is definitely original as Foauni store does not sell fake things.

You won't get 50% output from those s this period.

Everyone is reporting much degraded output.
Used to get nameplate, now max out at 45% ish

Run these checks in 3 - 4 weeks when the bloody Harmattan is done

easyyoke:


My Jinko is clean. It is brand new. So no dust on it yet. Just 3days old and I have been taking the reading over the course of three days. Good shinning sunlight. Yet the max I am getting is 270w out of the Jinko 550W

Am sorry bro
But I laughed out loud upon the above.
Not dust on the s o. But huge dust in the air above affecting everyone Jinko or no Jinko. Wait for the first or 2nd rain to wash the said Harmattan dust in the atmosphere off. By then, sun rays will fully hit your pv wella. Dust don chop better part of the sun comot. So bro, the sun you are feeling now is big fake. Leave your set up till March/April and check again. Cheers.

easyyoke:


It is a single 550w . I dont really know much about orientation. I just placed the outside. I am waiting to get one more before putting it on the roof. My controller is a 40A HQST MPPT Charge controller. Can you please shed some light on the orientation. Maybe that could be one of my issues

Please wait a little while for the weather to clear ,a properly oriented will face the sun directly 80% of the time...my opinion though 🫣

easyyoke:


It is a single 550w . I dont really know much about orientation. I just placed the outside. I am waiting to get one more before putting it on the roof. My controller is a 40A HQST MPPT Charge controller. Can you please shed some light on the orientation. Maybe that could be one of my issues

Your roof slant too much?

I believe Max 25 Deg is allowed for optimal performance of the .

Btw, no be too much money dey make pv perform oh.

easyyoke:


I dont really have much idea about orientation. I have not mounted it on my roof yet. I just placed it outside for now. I want to add one more 550w to it before I put it on the roof. The wire length from the to my MPPT charge controller is 10yards. I am using a 6mm pure copper wire. The current is rated for 13A under loads. To troubleshoot if it was my wire that was the problem, I actually took both my controller and my battery close to the and ran the original wire straight from the to the controller and I was still getting 275, 280W max at peak sunlight. So I dont think it is my wire. It is a single 550w Jinko bought directly from Foauni stores.
Here is the picture of where I placed it. There is no shading at all. Ignore those other two s. Those were the first 300w s I bought. Those ones too are giving me 100W max per . So I have been wondering what is the problem. Lets assume those 300w are fake s, this Jinko 550w is definitely original as Foauni store does not sell fake things.

You have no problem.
The is trying your concern should be to increase your cc.

The 40A can only fend for 550w × 2.
That if you don't have plans to install the 300w s

AshipaEk0:


You won't get 50% output from those s this period.

Everyone is reporting much degraded output.
Used to get nameplate, now max out at 45% ish

Run these checks in 3 - 4 weeks when the bloody Harmattan is done

Thank you. This seem like a very logical answer. I will wait till after the harmattan is done. Thank youuuu