Sept21
148.6kwh produced
Best 7th 12.2kwh
worst 5th 1.5kwh
That's interesting, thank you. They are, indeed, totally black panels (REC Alpha Black 360s). And they do, indeed, look "aesthetically pleasing". Doesn't bode well for when we get a really hot summer. That said, they face the front of the house, and I probably would have picked the same regardless.
Had a couple of days towards the end of Sept where generation (blue) exceeded consumption (red), which probably helped the net import lower a bit. 11.5kW system.
Doesn't bode well for when we get a really hot summer.
Time to invest in some more panels :-)
I think this proves Ireland is a good location for solar, not to hot not to cold.
No more room on the roof, really. Anything facing vaguely South is either tapped out, or would require that trees be cut down. In any case, we generate enough to cover pretty much all our needs for most of the year anyway, it wouldn't make sense for us to add more just for a few months.
It may be, but that doesn't necessarily prove it. For me it's the summer months which are the inadequate ones for production to meet consumption due to the massive air conditioning demands. I suspect that the reverse may be true in Ireland, sufficient sun that if one installs what one requires to cover summer needs, the other end of the year might be far less productive in terms of demand/supply ratios.
Thats not to shabby TBF
Don't know the layout of your house of course, but if summer is your main pain point, and you have any east/west roof space, you'll get ~80% of the south production on those. Slope angles notwithstanding of course. Very feasible to put panels on them. My own in Dublin is an East/west split.
Even north would give "some" production in summer months. Can't say if north would be worthwhile but east/west may actually be helpful in cooling the house early morning/evening time. Have a chat with an installer. They'd run the numbers for you, or one of the websites. Course if you've no east/west roof space......
I can put at least 3kW of panels on the West side (technically WNW), but I don't see the point. It's a lot of excess capacity for most of the year, wasted dollars going to no use which would not earn themselves back by the Summer months only. My install is for economic, not environmental or self sufficiency requirements.
Yeah, you'd know your numbers better than me. You've an interesting problems there Manic.
Still panels are what $200-300 USD and since you already have all the existing kit (inverters/batteries) you'd only be paying for the panels, and install of course. You may find that your AC consumption rate alone in the summer months would justify the expense and pay for itself. Maybe a 5-6 year payback? Dunno.
You'd have to run the numbers as I don't know your leccie unit rate, the shortage you have on your generation verses consumption, how much you would get out of the NWN panels - but I'd be optimistic even for the summer months, but maybe I'm wrong. I have been before :-)
Can we leave this thread for monthly output posts.
There are other discussion focused threads
16kWp DC / 11kWp AC: 5.76kWp SSW, 4.48kWp ESE and 5.76kWp WNW all 45 degree pitch in Cork with 18.9kWh battery.
South: 395.92kWh East/West: 630.65kWh PV Total: 1026.57kWh Best Day: 7th (65.45kWh) Worst Day: 8th (12.92kWh) Grid Export: 268.63kWh Grid Import: 147.58kWh Surplus Energy: 121.05kWh CO2 Saved: 460.61kg House/Car/Water Usage: 902.41kWh
Another month of busted myenergi logging.
I got my first full bill for Aug /Sept/oct
Last year I used 946 units(24 hr rate) This year 627 spit between 291 day /396 night.
Even with a 40% increase in day rates I saved 50euro.
3.24kw facing west
Septembers 162.5kW 2.5 system north east facing
Best day 14/9 10kW worst 30/9 2.4Kw
I am just getting to know the Solis inverter and app, installed 2 days ago. What is the definition of the 'Self Use Rate'?
Self Use Rate, the amount of PV you generate that you use yourself and don't export e.g. you generate 10kW today and use 6kW in the home and export 4kW to the Grid, your Self Use Rate will be 60%
What slave1 said.
this is bloody amazing, end of October and hot water is max., 2.4kW battery full and EV fully charged and everything washed! and still exporting surplus! 🤣
.. those with 1+yr experience, can we expect same performance at end of February, or is irradiance generally lower? (isn't there some sort of solar orbit asymmetry?!)
Yeah today at 2pm... I had a full battery and 2Kw pouring in from the glorious sunshine. I grabbed the electric chainsaw and put on the washer. i refuse to give anything back to the grid!
What a day.
How do u enable all those check marks... I only see power
South: 378.68kWh East/West: 483.13kWh PV Total: 861.81kWh Best Day: 1st (54.80kWh) Worst Day: 27th (1.88kWh) Grid Export: 248.13kWh Grid Import: 316.70kWh Surplus Energy: -68.57kWh CO2 Saved: 333.79kg House Usage: 779.39kWh Car Usage: 99.53kWh Water Usage: 51.46kWh
Looks like midway through October is when I no longer produce more than I need on a monthly basis. Annually though I'm in the clear, a lot of excess over the Summer.
Oct Total 338.9kw
Best day 1st 29.6kw
Worst day 27th 1kw
Imported 158.8kw (nearly all on night rate)
Exported 60.6kw
Consumed 441.2kw
Water diverter 59.3kw
no clue, its just on the app I have.
4.78kWp array facing south, Dublin.
Total generation 313kWh
Best day 21.2kWh (1st Oct)
Worst day 2kWh (27th Oct)
2.76kw on a south facing roof. My first whole month. Need to get used to trying to use the oven in the middle of the day!
Interesting, I have a very modest solar thermal install (2XF.Plate) which has performed just as expected over the past 11 years, the system measures its daily&summated output in kwh and I take the daily radiation from Met eireann to calculate its efficiency.
Does the following calc seem reasonable?.
you have 3KWp so this gives a area panel area of 15M2 (assuming 5M2/kw)
September total solar radiation for Cork, was 84.74Kwh so total absorbed kwh, 15*84.74, 1271kwh. Produced 148.6kwh, panel efficiency, 148.6/1272, 11.7%.
For anyone interested I get the info here from yesterdays weather (Met Eireann), multiply the Global radiation X 0.002777 to convert J/CM2 to kwh/M2.
https://www.met.ie/latest-reports/observations/yesterday
Do you have a battery? If not I think it could be a good idea.
Not yet, next on the list is an EV car and eventually a battery but that could be next year.
Total for October 373kw
Best 1st 26kw
Worst 13th 4kw
Import 186kw
Export 23kw
Consumed 544kw
EV 60kw
Self use rate 94%
Starting to see shading on the 4kw string on my shed due to low sun 😥
I think next on the list is explaining why your Eddi is called "the horse".
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