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DrPhilG · 17-09-2020 03:58PM

Sun is not directly overhead these days, more over to the side. So the house array, despite being bigger, hasn't surpassed the generation of the garage.

garo · 17-09-2020 04:55PM

It will get worse for your house array and we roll into autumn and winter.

Winterman1234 · 17-09-2020 05:07PM

So are your house panels facing in a north/north west and garage more westerly. Sun shining here at the minute @17:00 but as panels facing south east only making 400watts (out of 2.4KW). Output really falls fast now after 2.00PM

DrPhilG · 17-09-2020 05:55PM

Winterman1234 wrote: »

So are your house panels facing in a north/north west and garage more westerly. Sun shining here at the minute @17:00 but as panels facing south east only making 400watts (out of 2.4KW). Output really falls fast now after 2.00PM

Garage faces south, house west.

Still generating 2.3kw at the minute, but never topped 4 all day. On a similar day (sunshine wise) in early August we generated over 35kWh. Today its 23kWh so far.

Winterman1234 · 17-09-2020 06:11PM

DrPhilG wrote: »

Garage faces south, house west.

Still generating 2.3kw at the minute, but never topped 4 all day. On a similar day (sunshine wise) in early August we generated over 35kWh. Today its 23kWh so far.

Only making 150 Watts (2.4kw array)now(6.00pm), while northwest side of the house gets the sun.

DrPhilG · 17-09-2020 06:53PM

I'm still getting 1kw at the minute, 750w of it on the west facing panels. Almost 25kWh for the day.

graememk · 17-09-2020 10:40PM

Ended today with 23kwh, Phil you can really eek out the last of the light on yours.

Winterman1234 · 17-09-2020 11:23PM

graememk wrote: »

Ended today with 23kwh, Phil you can really eek out the last of the light on yours.

Ended up with 6.2kWh(2.4kw) here, dull enough morning. Phils setup ready highlights the advantage of split directions. As I said I was only producing 150 Watts at 6, while the front of house facing north west was basking in sun. Panels on northwest facing roof probably not worth it really only going to be an advantage in evenings during summer. But if I add any more in future definitely don't want them facing same direction as current.

phester28 · 18-09-2020 08:52AM

Only got 2.8Kwh yesterday the 17th of Sept.

Can I suggest a template to be included in every post to make it easier for people to relate / compare generation

KWh : x for date: y
Location: (county)
KWP: ta
Split string: Y/N 2Kwp:1.5Kwp if Yes then a orientation if known

We would then be able to quickly check each others generation from around the country and compare like for like

DrPhilG · 18-09-2020 09:13AM

Not a bad idea phester.

However did you just post a suggestion of a reporting template alongside your own figures which weren't in that template?

Also:
KWh: 24.8 for 17th September
Location: Donegal
KWP: 6.2
Split string: 2.8kWp(S):3.4kWp(N)

Winterman1234 · 18-09-2020 10:07AM

kWh:6.2 for 17th September
Location:Donegal
kWp:2.48
(kWh per kw of Array): 2.5
Single String: South East

And what above a kWh per KW of array, to compare performance. I had 6.2/2.48 = 2.5kWh for every kwp of array, while phil had 24.8/6.2 - 4kWh for every kWp of array. Phil system performed better yesterday, because he is able to grab the sun for a longer portion of the day with his split array. Maybe over complicating it, but love my numbers!.

garo · 18-09-2020 10:22AM

KWh: 15.9 for 17th September
Location: Dublin
KWP: 4.8
Split string: 2.4/2.4 E/W

ec_pc · 18-09-2020 11:27AM

KWh: 15.2 for 17th September
Location: Kildare
KWP: 4.8
Single string : SSW

graememk · 18-09-2020 07:12PM

KWh: 24.2 for 18th September
Location: North Donegal
KWP: 5.6
Dual string on same roof. (lower panels at risk of shadow in the winter) SE,

As perfect a day as you can get sunshine wise

Edit today is the 18th!

gally74 · 18-09-2020 07:25PM

KWh: 13.9 for 17th September
Location: Gallimh
KWP: 4.2
Enphase,

phester28 · 18-09-2020 07:36PM

KWh: 7.6Kwh 18th September 2020
Location: Cork City
KWP: 2.4
Split string: 1.5:0.9KWp E/W

DC2 is West DC1 is East. Volts are about 150 and 90 for each string

Best day this month so far and almost a perfect curve

18th sept 2020.PNG

DrPhilG · 18-09-2020 09:02PM

KWh: 23.4 for 18th September

Location: Donegal (Burt)

KWP: 6.2

Split string: 2.8kWp(S):3.4kWp(W)

Mickeroo · 18-09-2020 09:14PM

KWh: 17.6 for 18th September

Location: Mayo

KWP: 3.7

SW facing

Nice curve today:

Winterman1234 · 18-09-2020 10:37PM

KWh: 10.3 for 18th September

Location: Donegal (South)

KWP: 2.48 (South East)

DrPhilG · 19-09-2020 04:25PM

I know I'm unlikely to get much sympathy given the high numbers I've been posting lol

Is this level of reduction in generation normal? Only installed in late July so I don't have anything to compare to.

Compare a scorching day in early August to a scorching day in mid September.

August 8th - 35.8kWh - over 4kw for long spells, peaking at 5kw briefly.

September 18th - 23.4kWh - peaking at 3.6kw

Today - 17.6kWh so far

This is from 1pm today, sun directly overhead but the house array is only at 800w.
attachment.php?attachmentid=526836&d=1600529136

attachment.php?attachmentid=526836&d=1600529136

And now (6:30pm)

In August the house panels would be hitting full capacity of 3.8kw at times but they haven't passed 2kw in the last few days which have been roasting hot with clear skies.

Juat wondering if something is wrong if that's just normal with the change in angles of the sun etc. Seems like quite a significant drop.

Anyone else got comparisons for what they were hitting at peak then and now?

garo · 19-09-2020 07:16PM

This is normal. And it is going to get worse. Sorry to be the bearer of bad news. Nov-Feb you probably won't be able to charge your car with solar at all.

davpower · 19-09-2020 07:59PM

KWh : 24.3 for date: 19th Sept 20
Location: Cork
KWP: 5
Single string: South

phester28 · 19-09-2020 08:08PM

KWh: 6.6Kwh 19th September 2020
Location: Cork City
KWp: 2.4
Split string: 1.5:0.9KWp E/W

DrPhilG · 19-09-2020 10:58PM

garo wrote: »

This is normal. And it is going to get worse. Sorry to be the bearer of bad news. Nov-Feb you probably won't be able to charge your car with solar at all.

No problem, I'm actually just about on track for the predicted total for the month, just making sure that was a normal drop.

DrPhilG · 19-09-2020 11:01PM

KWh: 25.7 for 19th September

Location: Donegal (Burt)

KWP: 6.2

Split string: 2.8kWp(S):3.4kWp(W)

That's over 70kWh in 3 days, not too shabby. Exported 6.5 today though, dammit. The missus decided she wanted to go for a drive before work so I was out from 1 til half 4. Peak times.

Still got 7kWh into the car when I got back.

idc · 20-09-2020 09:39AM

DrPhilG wrote: »

Split string: 2.8kWp(S):3.4kWp(N)

Should that N (north??) be east or west ?

Winterman1234 · 20-09-2020 01:04PM

11.2kWh for 19th September
Location: Donegal(South)
Kwp: 2.48kw South east

Winterman1234 · 20-09-2020 01:13PM

DrPhilG wrote: »

I know I'm unlikely to get much sympathy given the high numbers I've been posting lol

Is this level of reduction in generation normal? Only installed in late July so I don't have anything to compare to.

Compare a scorching day in early August to a scorching day in mid September.

August 8th - 35.8kWh - over 4kw for long spells, peaking at 5kw briefly.

September 18th - 23.4kWh - peaking at 3.6kw

Today - 17.6kWh so far

This is from 1pm today, sun directly overhead but the house array is only at 800w.

And now (6:30pm)

In August the house panels would be hitting full capacity of 3.8kw at times but they haven't passed 2kw in the last few days which have been roasting hot with clear skies.

Juat wondering if something is wrong if that's just normal with the change in angles of the sun etc. Seems like quite a significant drop.

Anyone else got comparisons for what they were hitting at peak then and now?

On Friday the sun shine all day but my peak was 1.5kw(2.48kw system), yesterday was a duller morning and when the sun broke through I shoot up to over 2kw. With the sun shining on panels all day Friday, they were very hot to touch, i know panels are more efficiency at lower temps. I have noticed this a few times over the summer. The only times I have ever exceeded, my full instantaneous output has been on showery days, on long clear days peak always seems lower.

drdidlittle · 20-09-2020 03:16PM

18.6 kWh for 19th
Sligo
4.2 kw

DrPhilG · 20-09-2020 07:21PM

idc wrote: »

Should that N (north??) be east or west ?

Indeed it should. Brain fart...

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