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Snowlar Panels and a slightly off topic use for surplus energy
(06-25-2019, 12:27 AM)chuckp Wrote:
(06-24-2019, 11:26 PM)OffGridInTheCity Wrote:
(06-24-2019, 10:36 PM)chuckp Wrote:
(06-23-2019, 03:18 PM)OffGridInTheCity Wrote: My first summer with full system (24 Solarworld panels - 6.885kwh - 25deg angle facing south).   I've been excited to see what the actual max output would be after 1.5 years of planning, speculation etc.     Here's the answer Smile




It looks like 46.8kwh on Jun 20th is my max.  This is as close to 6/21 (longest day of year) and low 75F temperature and completely cloudless as I'm likely to get.   You'll notice in the list of day/kwh my first 100F day on Jun 11th only netted 42kwh.  This shows that as temp rises from 70F to 100F I loose 10% output.   Not unexpected - just interesting to see in 'real life' as apposed to reading about it.

Very nice yealds, we are having the filthy summer, very few cloud free days, mostly dark clouds, rain and wind.
Had couple of nice days 30kWh plus, but two awful days again 9.09kWh and 14.53 kWh today. So very poor prduction, I was hoping for a lot more.



Last month's and this month's production,
 

Yes sir - dark/rainy is a solar killer.   My worst with same 6.885 array was 1.8 kwh for *whole day* last Jan 19th.

My year to date has been very low, but I only had half the panels up over the winter. I didn't get the full 7kWp up until the beginning of April.

I'm hoping to see a massive improvement over the next 12 months. My best since all the panels have been up was 39.26kWh and I think the lowest was 5.38kWh


I found PVWatts (PV array estimation) a while back and have been interested to find that its pretty darn close.    I use this info (with defaults for Advanced):

which yields these results:


I've found that I'm doing a little better on PV array kwh BUT my inverter is only 86% efficient (14% loss just for inverter) and so I'm running neck and neck - maybe a bit ahead if the weather is nice.

Its fun to use PVWatts!
Reply
(06-25-2019, 01:51 AM)OffGridInTheCity Wrote:
(06-25-2019, 12:27 AM)chuckp Wrote:
(06-24-2019, 11:26 PM)OffGridInTheCity Wrote:
(06-24-2019, 10:36 PM)chuckp Wrote:
(06-23-2019, 03:18 PM)OffGridInTheCity Wrote: My first summer with full system (24 Solarworld panels - 6.885kwh - 25deg angle facing south).   I've been excited to see what the actual max output would be after 1.5 years of planning, speculation etc.     Here's the answer Smile




It looks like 46.8kwh on Jun 20th is my max.  This is as close to 6/21 (longest day of year) and low 75F temperature and completely cloudless as I'm likely to get.   You'll notice in the list of day/kwh my first 100F day on Jun 11th only netted 42kwh.  This shows that as temp rises from 70F to 100F I loose 10% output.   Not unexpected - just interesting to see in 'real life' as apposed to reading about it.

Very nice yealds, we are having the filthy summer, very few cloud free days, mostly dark clouds, rain and wind.
Had couple of nice days 30kWh plus, but two awful days again 9.09kWh and 14.53 kWh today. So very poor prduction, I was hoping for a lot more.



Last month's and this month's production,
 

Yes sir - dark/rainy is a solar killer.   My worst with same 6.885 array was 1.8 kwh for *whole day* last Jan 19th.

My year to date has been very low, but I only had half the panels up over the winter. I didn't get the full 7kWp up until the beginning of April.

I'm hoping to see a massive improvement over the next 12 months. My best since all the panels have been up was 39.26kWh and I think the lowest was 5.38kWh


I found PVWatts (PV array estimation) a while back and have been interested to find that its pretty darn close.    I use this info (with defaults for Advanced):

which yields these results:


I've found that I'm doing a little better on PV array kwh BUT my inverter is only 86% efficient (14% loss just for inverter) and so I'm running neck and neck - maybe a bit ahead if the weather is nice.

Its fun to use PVWatts!

That looks like a fun app. I’ll look out for it.
UK Southwest.

7 kWp Solar Panels (28 x 250Wp Shinetime Mono).
14 X APS YC500i Micro Inverters.
Still sourcing and processing cells for powerwall.
Planning on a Sofar Mass Energy ME3000SP AC coupled grid tied inverter.
Reply
Much better day today.

Managed to produce 32.76kWh. Not sure yet if I'll pass that 40kWh day yet.

UK Southwest.

7 kWp Solar Panels (28 x 250Wp Shinetime Mono).
14 X APS YC500i Micro Inverters.
Still sourcing and processing cells for powerwall.
Planning on a Sofar Mass Energy ME3000SP AC coupled grid tied inverter.
Reply
Another cloudy day.

Dropped back again, 18.65kWh today.

UK Southwest.

7 kWp Solar Panels (28 x 250Wp Shinetime Mono).
14 X APS YC500i Micro Inverters.
Still sourcing and processing cells for powerwall.
Planning on a Sofar Mass Energy ME3000SP AC coupled grid tied inverter.
Reply
Production had dropped off due the nasty weather we'd been having.

This week it's been a lot more sun and less cloud so back up into the high 30kWh's again.
The last few days have been 38.67kWh, 37.03kWh and 37.24kWh today.

UK Southwest.

7 kWp Solar Panels (28 x 250Wp Shinetime Mono).
14 X APS YC500i Micro Inverters.
Still sourcing and processing cells for powerwall.
Planning on a Sofar Mass Energy ME3000SP AC coupled grid tied inverter.
Reply
Had a couple of very cloudy days again.

Yesterdays production was down to 23.06kWh today was slightly better at 31.42kWh.

jdeadman likes this post
UK Southwest.

7 kWp Solar Panels (28 x 250Wp Shinetime Mono).
14 X APS YC500i Micro Inverters.
Still sourcing and processing cells for powerwall.
Planning on a Sofar Mass Energy ME3000SP AC coupled grid tied inverter.
Reply
Had a great sunny morning today but the afternoon turned very cloudy again.
Still managed to produce a reasonable 32.1kWh.

UK Southwest.

7 kWp Solar Panels (28 x 250Wp Shinetime Mono).
14 X APS YC500i Micro Inverters.
Still sourcing and processing cells for powerwall.
Planning on a Sofar Mass Energy ME3000SP AC coupled grid tied inverter.
Reply
(07-09-2019, 08:39 PM)chuckp Wrote: Had a great sunny morning today but the afternoon turned very cloudy again.
Still managed to produce a reasonable 32.1kWh.


I feel your pain.  I have same size array as yours.  Been running in 40s until today.  Looked like this most of day:
 
and I'm only nearing 20kwh for the day.    Solid clouds throw a wet rag on solar production for sure Smile
Reply


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