Navitron Renewable Energy and Sustainability Forum

SOLAR PHOTOVOLTAIC => Solar Photovoltaic Systems => Topic started by: buzzlightear on October 14, 2015, 12:02:52 PM



Title: 20 Mwh Club
Post by: buzzlightear on October 14, 2015, 12:02:52 PM
I seem to recall this being discussed a while ago by some of the early adopters/large array members, but I can't find it for the life of me so thought I start a new thread.

My generation bean counter finally ticked over the 20000 Kwh's production exhappy:

It's been eagerly anticipated with the late surge of autumn sun, but finally made it on 6th October; 4 years 6 months and 19 days since installation, or, 1664 days / 39,936 hours / 2,396,160 minutes, etc.

An averaged daily output of just over 12 Kwh's per day from a 3.92kw system, which - touch wood - has never faultered or had panels cleaned.

Don't remember how this compares to other members but it far exceeds all expectations I had when making the initial installation decision. So glad that I did.

Hope good performance is allowed to continue for remainder of FiT term as now have eyes firmly set on achieving 100 Mwh's over the 25year lifetime.



 

 


Title: Re: 20 Mwh Club
Post by: skyewright on October 14, 2015, 12:23:15 PM
My generation bean counter finally ticked over the 20000 Kwh's production exhappy:
Congratulations.
14970kWh here as of yesterday (the array passed its 5th anniversary just over a month ago).


Title: Re: 20 Mwh Club
Post by: billi on October 14, 2015, 01:18:56 PM
i guess 

...am  over 25000 kWh from PV on its own


Title: Re: 20 Mwh Club
Post by: dan_b on October 14, 2015, 01:22:21 PM
7 MWh from my little system so far in just shy of 3 years (installed November 2012).


Title: Re: 20 Mwh Club
Post by: buzzlightear on October 14, 2015, 02:01:36 PM
i guess 

...am  over 25000 kWh from PV on its own

NICE! You must be really pleased. How long has yours been installed?


Title: Re: 20 Mwh Club
Post by: billi on October 14, 2015, 02:14:14 PM
... about 8 years ago  i got my first 1.6 kw PV  and  2 years later   good deal and got 2400 watt for 1 euro per watt (very lucky that time )  .... , but i just estimate my production  .... , 


Title: Re: 20 Mwh Club
Post by: guydewdney on October 14, 2015, 08:02:42 PM
89,475 from hydro here.....
27,493 from pv 6 months ago (last reading available in the dark....)


Title: Re: 20 Mwh Club
Post by: mysterons on October 14, 2015, 08:55:52 PM
22070kwh, system age five years and one day since install by the now defunct Mark Group.


Title: Re: 20 Mwh Club
Post by: nowty on October 15, 2015, 12:03:37 AM
21.1 MWh's if I add both FIT meters together so I guess I'm in the club. exhappy:
My original 4kw grid tied system will hit 20+ MWh's mid next year by itself.


Title: Re: 20 Mwh Club
Post by: M on July 06, 2016, 09:41:08 AM
I'm a little late to the party, but TGM's just reached 20,000.2kWh. Not bad for an E/W system on a 3 bed semi.

Is there any cake left?

[Breakdown:- installs Aug 2011 and July 2012. Leccy consumption during the period, approx 15MWh (8MWh import and 7MWh PV)]

Mart.


Title: Re: 20 Mwh Club
Post by: dan_b on July 06, 2016, 10:05:43 AM
8.6mWh here, long way to go!


Title: Re: 20 Mwh Club
Post by: M on July 06, 2016, 11:20:21 AM
8.6mWh here, long way to go!

Hiya Dan, luckily I'm not cruel enough to make a joke about milliwatts.  ;D

Mart.


Title: Re: 20 Mwh Club
Post by: dan_b on July 06, 2016, 11:53:00 AM
Lol!


Title: Re: 20 Mwh Club
Post by: nowty on July 06, 2016, 12:06:34 PM
My original 4kw grid tied system currently at 19,947 so will hit the 20MWh over the weekend.

Less than 5 years in, so hopefully will clock up the magic 100MWh before the FIT contract runs out.

Thats if I'm still glued to the generation meter in 2035. wackoold


Title: Re: 20 Mwh Club
Post by: charlieb on July 06, 2016, 02:12:06 PM
(I'm just short of 50MWh for my 10kW wind turbine.  I'd be well on the way to 100MWh if it had just been running most of the time. .. And I've just noticed this is in the PV section. Sorry!  Couldn't resist pointing it out though.)


Title: Re: 20 Mwh Club
Post by: billi on July 06, 2016, 02:24:46 PM
Very welcome :)


Title: Re: 20 Mwh Club
Post by: regen on July 06, 2016, 08:04:16 PM
21054kwh thro the 3.92kw system since sept 2011 and 7000kwh of that thro the immersion since oct 2012

regen


Title: Re: 20 Mwh Club
Post by: supremetwo on July 06, 2016, 09:23:17 PM
Milestone reached here now 20.727 MWh.


Title: Re: 20 Mwh Club
Post by: nowty on August 02, 2016, 04:44:18 PM
My main 4kw system has finally joined, ralph:

(https://s5.postimg.org/9u5rd8prb/IMG_0576.jpg) (https://postimg.org/image/702lzsnkz/)upload gambar (https://postimage.org/)


Title: Re: 20 Mwh Club
Post by: guydewdney on August 06, 2016, 12:20:39 AM
95,435 on hydro
40,000ish on solar

Anyone beat me with a domestic system? :)


Title: Re: 20 Mwh Club
Post by: Golfer on November 14, 2016, 12:23:19 PM
Well my little 3.36kWp PV system finally clocked up the magic 20,000kWh yesterday, 6years 1month and 5days after installation in 2010.
I am really pleased with the performance of my PV set-up and hope it continues throughout the FIT contract period.
The combination of energy and cost savings from having purchased PV, Solar Thermal, Wooodburner and Electric Car have proved to be best investment this pensioner could have ever made - thanks to this forum for all the helpful constructive advice!


Solar PV - 14 Sanyo HIT-240HDE4 panels, SMA SB3300 Inverter, 35degree south south east facing roof.
Solar Thermal - 2 Genersys 1000-10 panels, Gledhill 210litre, Resol DeltaSol BS Plus Pump Controller, Horstmann Electronic 7 water heater control
Stovax Riva 4.9kW Woodburner
2013 Nissan Leaf Tekna


Title: Re: 20 Mwh Club
Post by: skyewright on August 01, 2017, 09:22:22 AM
Well my little 3.36kWp PV system finally clocked up the magic 20,000kWh yesterday, 6years 1month and 5days after installation in 2010.
Well here, we passed the 20,000kWh yesterday, that's 6 years and 11 months since installation on 1st September 2010.

That's a lot longer than most, but hey, it's WSW facing and we are at 57N, so  ;D ;D ;D


Title: Re: 20 Mwh Club
Post by: buzzlightear on August 01, 2017, 11:17:00 PM
Welcome to the club! One throughly satisfying & rewarding target achieved it's onwards and upwards to the next. What we need now are some badges (a la kids swimming badges) to mark each stage of the journey.

How about;
20 Mwh+ = Lead
40 Mwh+ = Brass
60 Mwh+ = Bronze
80 Mwh+ = Silver
100 Mwh+ = Gold
120 Mwh+ = Platinum


Title: Re: 20 Mwh Club
Post by: linesrg on August 02, 2017, 02:48:59 AM
Good Evening All,

My system went through the 20MWhr barrier at the end of June.

Regards

Richard


Title: Re: 20 Mwh Club
Post by: mysterons on August 02, 2017, 09:18:56 AM
My 3.96 system in my sig is currently showing 29300kwh so it should have easily passed the 30Mwh milestone before it's 7th anniversary in October.


Title: Re: 20 Mwh Club
Post by: brackwell on August 02, 2017, 05:08:30 PM
32MW, 5.5yrs, Paid for itself twice over !

Ken


Title: Re: 20 Mwh Club
Post by: skyewright on August 02, 2017, 05:20:41 PM
32MW, 5.5yrs, Paid for itself twice over !
We are on the top rate tariff, but were on the leading edge price wise. Last time I did the maths the original estimate of around 10 years to 'pay for itself' still seemed like a reasonable estimate. Not complaining. It was "A Good Thing", and remains so.


Title: Re: 20 Mwh Club
Post by: dimengineer on August 03, 2017, 09:56:03 PM
Sadly, only 7MWh from mine - its only a 7 panel, 1.7kWp install and it suffers from quite bit of winter shading. But i'm still glad I did it. I do use (I reckon) over 75% of the electricity generated. Payback is going to be a bit over 10 years.


Title: Re: 20 Mwh Club
Post by: Nickel2 on August 04, 2017, 12:10:38 PM
Recent article shows the north having more sun than the south during July.

http://www.bbc.co.uk/news/uk-40798901

Do generation figures show this up?


Title: Re: 20 Mwh Club
Post by: paul149 on September 11, 2017, 03:47:59 PM
Let me in Boys...."I've seen it wid me own eye's I have" and can prove it, cause if you ain't got pic's some say it never happened!

so here you go, T'was about 5 past 1 today, just before it happened...and then I got a pic of the moment in time!


Title: Re: 20 Mwh Club
Post by: dan_b on September 11, 2017, 04:54:49 PM
Nice, always like a good meter-roll-over pic, like when your car clocks over a milestone like 100,000 or something.


Title: Re: 20 Mwh Club
Post by: marshman on July 16, 2018, 09:07:07 AM
It will soon be time to "upgrade" the thread title and get a constitutional change to the name of the club as more of us cog up to 30 MWh (and higher).

With the last few weeks of sunny weather my 3.15 kW pk Sharp system has just clocked up 30 MWh (installed April 2010). Being an early adopter it cost a lot but it still repaid the outlay sometime time ago.

Also took the opportunity to wash the panels down. We haven't had rain for many weeks and I was getting concerned at the amount of bird poo and dust covering the panels. They are at a very shallow angle so even when it does rain they take a while to clean themselves. Made a difference of about 200W to the output (just under 10% at the time) so worth doing.


Title: Re: 20 Mwh Club
Post by: brackwell on July 16, 2018, 09:39:24 AM
I had my panels washed back along but any difference i saw i put down to the cooling of the panels. I really dont know how you would measure any of this.
Ken


Title: Re: 20 Mwh Club
Post by: marshman on July 16, 2018, 10:27:32 AM
Hi Ken,

Generally I would agree Ken but they really were dusty/dirty - never seen them so bad. I cleaned them around 3pm. When I started the inverter was showing a fairly steady 2250W. When I had finished (approx 30 mins later) the reading was around 2450W and stayed higher long after any temporary cooling effect.  (clear skies, not a cloud in sight). The daily readings for the last 2 days have been higher than other recent "perfect days" in spite of the much higher  ambient temps. There were a lot of "splodges" of poop on them which must have affected output.  My panels are on a garage roof so very easy to get out and as I said they are at a shallow angle so can suffer dust and dirt settling on them in the dry summer months. I do generally rinse them off once a year to stop any lichen getting a foot hold.

I have "played" with cooling before and its not worth the effort, tried ducting cooling air under the panels and trickling cold water over them. Any effect is at best temporary - and anything that goes on in front of the panel - i.e. trickling water just cuts down the amount of light and hence light counter acting any benefit.

Roger


Title: Re: 20 Mwh Club
Post by: brackwell on July 16, 2018, 02:05:02 PM
Hi Roger,
I can see the benefit in your case due to the flat roof etc.  I think solar panels are made with "self leaning glass" which must help at larger angles.  Despite the long sunny dry days i have been having quite heavy dews which i guess may help at large angles even if the dirt just drifts down to the lower edge frame.

Ken


Title: Re: 20 Mwh Club
Post by: JohnS on July 16, 2018, 04:41:21 PM

It will soon be time to "upgrade" the thread title and get a constitutional change to the name of the club as more of us cog up to 30 MWh (and higher).


No.  By all means change it to "Big systems club".

But some of us with more modest roofs and systems are still waiting to hit the magical 20Mwhs.  I will be clocking up 16Mwhs this week and don't want the goal posts moved before getting to 20Mwhs
hopefully in late 2020.


Title: Re: 20 Mwh Club
Post by: marshman on July 17, 2018, 08:50:30 AM

It will soon be time to "upgrade" the thread title and get a constitutional change to the name of the club as more of us cog up to 30 MWh (and higher).


No.  By all means change it to "Big systems club".

But some of us with more modest roofs and systems are still waiting to hit the magical 20Mwhs.  I will be clocking up 16Mwhs this week and don't want the goal posts moved before getting to 20Mwhs
hopefully in late 2020.

Sorry John, 'twas a bit thoughtless of me  surrender:.  Perhaps we should move away from an absolute number and quote as a "per kWpk installed figure".  So for my 3.15kW system I have been a bit premature as I am only on 9.5MWh/kWpk - no celebrations until I hit 10  :)



Title: Re: 20 Mwh Club
Post by: JohnS on July 17, 2018, 12:16:52 PM
Roger,

No problems.  I am only on 7.6MWh/kWpk.  I guess that reflects a bit of shading on mine and your sunny coastal location.

Have you noticed any loss of performance over time?  My trendline of sunshine hours per year is flat and my trendline of Kwh per sunshine hour per KwP has declined from about 0.608 to about 0.588 over 8 years which I reckon is about 0.4% per annum.  Sunshine hours are as per the  Met Office at Heathrow.  I appreciate that there are all sorts of arguments about guality of sunshine, morning or afternoon bias for non due south systems etc, but after 8 years there must be some statistical significance.

John


Title: Re: 20 Mwh Club
Post by: marshman on July 17, 2018, 12:39:57 PM
Roger,

No problems.  I am only on 7.6MWh/kWpk.  I guess that reflects a bit of shading on mine and your sunny coastal location.

Have you noticed any loss of performance over time?  My trendline of sunshine hours per year is flat and my trendline of Kwh per sunshine hour per KwP has declined from about 0.608 to about 0.588 over 8 years which I reckon is about 0.4% per annum.  Sunshine hours are as per the  Met Office at Heathrow.  I appreciate that there are all sorts of arguments about guality of sunshine, morning or afternoon bias for non due south systems etc, but after 8 years there must be some statistical significance.

John

Not noticed any drop off at all. Still hitting 24kWh on the best days and inverter power topping out at 3050W  (it is a SB3000). Just had 2nd best ever month in June and well over 320kWh already in July. Never done a check against sunshine hours as there are no local stations. Annual figures are fairly constant on both of my systems.

        Sharp      Suntech
        3.15kW      3.67kW
2011   3662   
2012   3635     4009
2013   3468     3838        ;issues with grid supply volts causing inverter disconnect
2014   3419     4012        ;issues with grid supply volts causing inverter disconnect
2015   3560     4014
2016   3660     3998
2017   3623     3984 kWh

Are panels getting dirty?

Roger


Edit: to correct units on inverter power!  3050W and not 3050kW  ;D


Title: Re: 20 Mwh Club
Post by: TheFairway on July 24, 2018, 09:35:16 PM

Also took the opportunity to wash the panels down. We haven't had rain for many weeks and I was getting concerned at the amount of bird poo and dust covering the panels. They are at a very shallow angle so even when it does rain they take a while to clean themselves. Made a difference of about 200W to the output (just under 10% at the time) so worth doing.


I took a hose to our lower panels today - the runoff then went into help top up the water butts. The panels were in the shade, it was end of the day, but the improvement was noticeable and unequivocal.  

Ok, increase in f-all is still f-all, but an indicator that cleaning the dust off in this weather makes a difference. Probably less so when its full sun though.

Upturn in tail of green line since cleaning panel. No other change in conditons other than approx 5% of panel area 'dusted'. It was well past 7pm and panels were already cool.

(https://s8.postimg.cc/b05jtw5jl/20180724_184357000_i_OS.png) (https://postimg.cc/image/b05jtw5jl/)


Title: Re: 20 Mwh Club
Post by: supremetwo on July 24, 2018, 10:31:44 PM
I took a hose to our lower panels today - the runoff then went into help top up the water butts. The panels were in the shade, it was end of the day, but the improvement was noticeable and unequivocal.
After the combine's work in the field opposite this evening, my panels, cars and local area are covered in a fine layer of threshed straw.

Fortunately no hosepipe ban here at the moment.