Solar PV Performance Thread - Post your monthly output

SouthWesterly · 04-11-2021 9:12am

https://www.boards.ie/discussion/comment/118113351#Comment_118113351

Speaking of aspect jealousy and seeing the numbers.

What's the ideal aspect and slope?

I'm on a mountain with land to spare so won't have any shadow.

championc · 04-11-2021 10:03am

South facing and possibly a 50 deg slope I would have thought

Jonathan · 04-11-2021 11:29am

https://www.boards.ie/discussion/comment/118116429#Comment_118116429

If you are going for a ground mount system, make sure you get an adjustable angle mount. This will allow you to maximise output during summer and winter. Something like this:

https://youtu.be/3G8qpb7Ppv4?t=163

SD_DRACULA · 04-11-2021 2:20pm

Net metering.... 🤬 our government

Manic Moran · 04-11-2021 5:23pm

https://www.boards.ie/discussion/comment/117990171#Comment_117990171

I took it offline by PM as requested, but I would observe that data for the sake of data is pointless. May as well have sidebars without taking up entirely new threads.

Summer is over. The last few days have seen either consumption about equalling production, or even some net exports. Overall net import is half of what it was the previous two months.

Again, 11.5kW system, central Texas.

Overall, the summer period has definitely 'saved' me money, when one considers what I paid last year, compared to what I paid this year between electricity bill and solar installation payment. However, again, it was an incredibly cool summer, which has completely murdered both consumption and production. We'll see closer to the end of the year, but I'm thinking I'm actually going to end up producing less than the 'guaranteed minimum' from the solar company. (They take the first three years and average out, though, just to make sure an unusual year isn't over-emphasised)

Manic Moran · 04-11-2021 6:41pm

https://www.boards.ie/discussion/comment/118018396#Comment_118018396

That's not a measure which seems important around here, interestingly. Here the more referred to rating is the 'independence from grid' figure. Kindof other ends of the same spectrum. One is based as a portion of production, the other as a portion of consumption.

The one can be seen as a measure of personal inefficiency. If you have a low self-use rate, then your system is too powerful for your needs and unless you get good money from ESB for exported electricity, it's a financial waste. If your self-use rate is 100%, it implies you may require more panels. If it's 40%, ESB probably loves you, but hey, you're at least helping save the planet, I guess.

'Independence from grid" works the other way. You can produce 200% of your needs, but if it's produced at the wrong time, there's a possible concern. Let's say your main consumption is at night but your main production is at daytime, the amount you have exported is irrelevant, you will have a low independence from grid percentage because it reflects not 'how much of your energy did you make', but 'how much of your energy did you use at the time you needed it'. If there is a 'low independence from grid' but you are producing about as much as you need, then it's an indicator that you may need to look at a battery, unless you get excellent credit for exported energy which equals the cost of import (such as is the case here in San Antonio).

The other reason to look at IFG is if you're wondering if you can survive in a power cut with what you produce. Anything less than 100% if you have a battery will be 'no'.

raytaxi · 04-11-2021 11:05pm

2.5kW louth 130 for month best day 7.8 on 5/10 worst day 1.3 on 27/10

Total since install 1610kW in April

uli84 · 09-11-2021 10:02am

Sorry to hijack the thread, can someone in the know explain to me what is shown here? Thanks

Jonathan · 09-11-2021 11:16am

https://www.boards.ie/discussion/comment/118139761#Comment_118139761

It is an export meter, and shows how much your system has generated since installation. i.e. 6527.2kWh

irishchris · 09-11-2021 11:38am

October Stats - galway

TOTAL 7.2kWp (4.3 south/2.88 west ) - Total production 420.3 KWH

4.3 Kwp (3.6 inverter) S/SW array -- 260.3 Kwh

2,88 Kwp (2.5 inverter) West array -- 160 Kwh

uli84 · 09-11-2021 11:47am

https://www.boards.ie/discussion/comment/118140066#Comment_118140066

Thanks so much, is there any way to make some use of it? Apologies again, feel free to direct me to a different thread with the question :) also how do people on this thread know their numbers? Is there something I should buy/install to know the performance?

Gazzler82 · 09-11-2021 10:05pm

https://www.boards.ie/discussion/comment/115123190#Comment_115123190

October ‘21

117.9kwh

Best 9.3 (Oct 1st)

Worst 0.4 (Oct 27th) 😳

slave1 · 13-11-2021 4:21pm

Midlands

4.1kWp SW, 3.3kWp NE

1000kW imported (Two EV household)

255.6kWh Generated

233.7kWh consumed

151kWh to Eddi

0kWh to Zappi

Highest was 1st, 15.9kWh

Lowest was 27th, 2.1kWh

19% self sufficient for month

Monthly cash saving based on average daily load and all non-load items like dishwasher/washing machine/immersion at night rate, €23.77

Savings is also less this month (apart from PV generation reduction) due to move to EV Energia which has a very low night rate

graememk · 13-11-2021 7:15pm

https://www.boards.ie/discussion/comment/118160931#Comment_118160931

Did you have any export? (Although I'd say the eddi sucked up any excess.)

slave1 · 13-11-2021 7:55pm

https://www.boards.ie/discussion/comment/118161950#Comment_118161950

21.9kWh, there's always micro exports throughout the day before EDDI etc can kick in

paddyirish23 · 14-11-2021 12:02pm

Hi all,

I'm getting the house upgraded for solar panels soon and was wondering if it's worth asking the lad to install a 2nd battery? Even if it's only used in the summer months is it worth having? Looking at the 6kwh with a 4.8 battery. Avg yrs units are 6.4k

Bobeagleburger · 14-11-2021 1:37pm

https://www.boards.ie/discussion/comment/118164078#Comment_118164078

You'll get more replies if you put it in the battery thread I'd say

Bobeagleburger · 14-11-2021 1:41pm

Oct 2021.

5.7 kWp SW,Galway.

Generated 309.3kWh

Best day 9th 23kWh

Worst day 26th 1.1kWh

scooterdoyle · 17-11-2021 8:31pm

new to threads lads and ladies

loving the stats and comments etc

working myself up to a self install of a 6 kW SYSTEM, TO GRID, NO BATTERY STORAGE.

can anyone advise me on good quality panels and inverter

ive been told by a electrician that you really need to get the good quality panels as it makes a big difference in terms of production and lifetime

what are the "Gold medal A class panels" and are they worth the extra shekels??

what's considered "middle of road"

and....

what should be avoided....!!!!!!!

💡👊...power to the people..........

( sorry , i couldn't resist....🤪)

DrPhilG · 17-11-2021 10:42pm

Panels are much of a muchness, the spark is talking toot I'd say.

They're the cheapest part of any system and chances are you'll upgrade before they're done anyway.

SD_DRACULA · 18-11-2021 11:00am

Yeah what DrPhil said, but for a 6kw system you should probably look into batteries or you'll end up exporting a lot unless you can use it as it comes.

Top tier panels would be the LG ones but makes absolutely 0 sense for the price when panels half the cost would give you as much power.

Qcells are good too and can allegedly boost up to 10% over their W rating, other decent ones seem to be Trina, Longi, REC, Jinko and probably many, many more.

20-11-2021 1:17am

Anyone have any reports on what a 10kW or 12kW system might produce at this time of year? Thanks.

Jonathan · 20-11-2021 2:54pm

https://www.boards.ie/discussion/comment/118194855#Comment_118194855

It depends on a lot of factors. However, this is reasonably accurate, run the numbers for yourself. https://ec.europa.eu/jrc/en/pvgis

jkgvfg · 20-11-2021 3:15pm

6kWp system, SSE facing (155 deg), Co. Kildare installed Monday 15th.

Cloudy all week. Yesterday was the worst - blue sky overhead, blue sky to the north, east and west from 10am to 1pm but a dark cloud stayed right on top of the sun all that time. Generated 2.4kWh on 3 of the days, not even enough to charge the battery. Couple of times the sun did peek through - this morning was the best - it was generating over 4Kw but then clouded over again before 12 o'clock when it should peak.

Reminds me of the time I put in one of those Intex pools outside - heater, canopy the works. Rained for 6 weeks solid from the time I filled it to the time I threw it out in disgust!!

Renewbie - a 10kW/12kW system will produce loads, I'm sure...unless you live too near me! I would say max 4-5kWh on cloudy days in November. Tomorrow is supposed to be sunny, I live in hope.

But I would recommend anyone who installs around this time of year waits until March before joining this thread or checking the apps...every 5 seconds. Not good for my mental health!

MAULBROOK · 20-11-2021 5:12pm

https://www.boards.ie/discussion/comment/118196391#Comment_118196391

Don't fret the system is perfect it just a timing thing. Look at it this way, you are generating something not nothing. Now step away from the app and go shout at the birds who are shixxing on your panels instead.

reklamos · 22-11-2021 7:13pm

What is happening? 2 days in a row such a nice curve. The sun is not that high and PV cannot reach full potential but this is beautiful

bullit_dodger · 22-11-2021 8:00pm

Agreed. At Dublin latitude the sun is only 16.5 deg above the horizon at noon which means it hitting my panels with a pretty high "slant angle" .....but all things considered, I'll take 5Kwhr generated at this time of the year.

My array is E/W facing with East 1.4 / West 3.8 - hence why I get a higher production after lunch.

(Thursday at the moment looks good - according to Met Eireann)

Jonathan · 22-11-2021 10:09pm

Indeed. Much needed lift after a gloomy couple of weeks.

27.7kWh generated between yesterday and today. 🌞🌞

irishchris · 22-11-2021 11:18pm

Cracking two days for late November 22.5 kWh today and 21.4 yesterday. Makes me miss the summer more 😁

kabakuyu · 30-11-2021 4:33pm

Thats it for another month, terrible day today in Galway.

2.5 Kwp south facing.

Total for month is 120 KWH.

Best day 4/11 was 9.6 kwh

Worst day was 28/11 .7 kwh.

Solar PV Performance Thread - Post your monthly output

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