Jump to content

Help - solar panels only producing 50% energy


SilverNodashi
 Share

Recommended Posts

Hi,

 

Please help! My solar panels are not working well. It seems to produce only about 50% energy. What can be wrong?

It's 8x 255W panels connected to a 4Kw Axpert inverter and 48V, 200A battery bank.

 

This morning at 9:40, it produced about 420W power. Location is silver lakes, Pretoria.

Link to comment
Share on other sites

5 hours ago, plonkster said:

Bad panel?

I checked the fuses and they are fine. All 4 panel strings have more or less the same voltage.

 

 

^^^^^^^^^^^^^^

 

Then we discovered this.

Production was at 870W shortly after washing the panels ;)

 

P.S i don't really need help, just wanted to bring the message across

 

IMG_20170803_094050-1024x768.jpg

 

IMG_20170803_094250-1024x768.jpg

Link to comment
Share on other sites

1 minute ago, PaulF007 said:

Ha ha , I didn't know that building had panels on it.If memory serves me there is a little solar shop right behind that M'D sign , maybe little to the left :P.

What building? ;)

The little solar shop isn't so little anymore, and it's a bit more to the left now, by about 90 degree probably. 

Link to comment
Share on other sites

1 hour ago, flatfourfan said:

with the amount of taxi's that ride on the shoulder of that road, there is no surprise that those panels look the way they do. 

 

But DAMMMMMMMMMMMMMMN, that's a lot of crap......lol.

Yup. Was like a blanket on top of the panels. Just goes to show, a bit of dust can make a big difference. 

Link to comment
Share on other sites

  • 1 month later...
  • 2 weeks later...

We really underestimate the level of dust in our atmosphere and how solar panels are great at grabing the stuff. Most of these panels indicate high tolerance to dust, snow, etc. They promise to work even in the desert. Hmm, how often do we clean 'em?

Link to comment
Share on other sites

1 hour ago, Kalito said:

We really underestimate the level of dust in our atmosphere and how solar panels are great at grabing the stuff. Most of these panels indicate high tolerance to dust, snow, etc. They promise to work even in the desert. Hmm, how often do we clean 'em?

Yup. And it's been quite dry recently so they don't get a natural clean-up as usual 

Link to comment
Share on other sites

So last weekend I also "cleaned" my panels. Just a few minutes of hosing down from the borehole. Panels is not easy to get to even with a regular extension ladder.

59c4a44a3158e_SolarPanelCleaning(2017-09-17).PNG.bd5d26fff84a75df9289f41fc2b3ad92.PNG

So the red line is a "regular" profile, and 'cos they are a bit oversized, the inverter "clips" the top of at just over 6 kW. 

The spike on the light brown graph is around 2 pm, when the panels were "cleaned".

The delta is about 1 kW, but I think the cleaning only contributes less than a half of that. The cooling down is very effective.

Now that makes me scheme......how about an automated "Cooling" system. And then recycle the water as water into the veggie patch.

Damn...the temps on the Inv. is already peaking at 49 Deg. Better add those extra fans then.....

maybe add another Inv:blink:.....

Ag well, I rather braai this weekend:D

Link to comment
Share on other sites

On 9/22/2017 at 7:58 AM, Sidewinder said:

Now that makes me scheme......how about an automated "Cooling" system.

I have been thinking seriously about adding one zone to the irrigation system which will spray down my panels at around midday each day. No, I'm not a Capie - you guys got the mountain, we got the water!!!

Just kidding, I'm on borehole water and I'm thinking a little bit of free water is a good trade off for a little extra fee power:D.

Link to comment
Share on other sites

The problem the cooling effect last about 10 minutes. I cooled my panels down about 18 months ago nothing major just sprayed them down with the hose. I got a 200W increase in power (from 3kW of panels). Interesting to note that from my PV String Tool I have deduced that my panels run at about 60°C in summer. Now to test whether the theory and real time observations coincide.

Link to comment
Share on other sites

20 hours ago, pilotfish said:

I have been thinking seriously about adding one zone to the irrigation system which will spray down my panels at around midday each day. No, I'm not a Capie - you guys got the mountain, we got the water!!!

Just kidding, I'm on borehole water and I'm thinking a little bit of free water is a good trade off for a little extra fee power:D.

Question is: will the panel frames corrode with the metal in the water?

Link to comment
Share on other sites

9 hours ago, Chris Hobson said:

The problem the cooling effect last about 10 minutes. I cooled my panels down about 18 months ago nothing major just sprayed them down with the hose. I got a 200W increase in power (from 3kW of panels). Interesting to note that from my PV String Tool I have deduced that my panels run at about 60°C in summer. Now to test whether the theory and real time observations coincide.

I have a temp sensor directly below one of my panels and another in the sun. They reach 60deg quickly in summer.

Link to comment
Share on other sites

20 hours ago, SilverNodashi said:

Question is: will the panel frames corrode with the metal in the water?

My experiences are that the first rains have a lot more acidity in them (from the air pollution) and panels are designed to last up to 20 years with all of that, not so?

However, with water laden with metals et al, it could dry on the panels and very slowly over time form a layer. Like one gets in kettles in select areas, where there is a "aanpaksel" formed on the sides and elements. Maybe.

But thinking of that, same applies to them just standing their cleaned by the "acid" rain.

So maybe it is advisable to wash them once or twice a year with soap or some such?

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

×
×
  • Create New...