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Forum Index : Solar : what do get in winter?

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Dazza123
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Joined: 03/11/2017
Location: Australia
Posts: 34

Posted: 08:18am 29 Sep 2018

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Just wondering what is a realistic winter out put.

I have found what I have during the depths of winter is averaging only about 1.5 system size.

NNE low angle in Adelaide.

is this what you would expect?

yahoo2

Guru

Joined: 05/04/2011
Location: Australia
Posts: 1166

Posted: 08:32pm 29 Sep 2018

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local conditions play a big factor, close to the beach I would expect a winter low close to 2, up to 2.2 with a higher panel angle and no shading and above 8 in peak summer.

Close to the hills face it is going to roll off 10-20% just because of the range formed cloud and the lost time till sunrise.

If you are in the hills it could be possible to get down to 1:1 in june and julyEdited by yahoo2 2018-10-01

I'm confused, no wait... maybe I'm not...

Dazza123
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Joined: 03/11/2017
Location: Australia
Posts: 34

Posted: 11:24pm 29 Sep 2018

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Thanks Yahoo

so I am getting whats expected! I am on the plains but on the West side of the Mount lofty ranges so I do have a later sun rise and also some tree shading in late afternoon.

I was a bit disappointed as most solar sellers say output only drops 20%, but also say there is still 3 hours of usable solar hours during winter, clearly not the truth

atleast the days are getting longer and less cloud now so happy days.

renewableMark

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Joined: 09/12/2017
Location: Australia
Posts: 1678

Posted: 05:09am 30 Sep 2018

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A month ago (end of august) I had 6500 watts on the roof (since put more) and was making enough to power the house and top up the battery by noon to early pm. We use around 10kw hours a day, so add a bit for battery inefficiency, it would be around 11kwhr.
Seems like you are about the same as me.

Cheers Caveman Mark
Off grid eastern Melb

yahoo2

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Joined: 05/04/2011
Location: Australia
Posts: 1166

Posted: 02:25pm 30 Sep 2018

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so, I have had a bit of a look around pvoutput.org at a few systems in Adelaide.

may and june this year for some of the low angle NE facing systems seem to be averaging 1.9 to 2.2 and they jumped to 2.5 for July. in the Plympton to Hallet Cove strip.

it looks like you could be 25-30% off the pace, unless you are on the rising ground towards the hills.

I'm confused, no wait... maybe I'm not...

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