wwhitney
Posts: 771
Joined: Sat Jul 17, 2010 10:10 am
Delivery Date: 01 Apr 2011
Location: Berkeley, CA

Re: new house block my solar panel...

Fri Feb 13, 2015 9:16 pm

dyyuan wrote: that being said, if we assume 1.83kwh lost * 180 winter days and about 4kwh lost * 180 summer days, it'd be about 1050kwh lost a year.
Summer loss should be less than winter, because the sun is higher in the sky.

Cheers, Wayne

dyyuan
Posts: 48
Joined: Mon Jun 27, 2011 8:51 am
Delivery Date: 11 Jun 2011
Leaf Number: 3883
Location: SF Bay Area

Re: new house block my solar panel...

Sat Feb 14, 2015 1:19 pm

I was going off my historical data, and seems during summer time, i start getting power as early as 6am.
the developer has not made or showed a shade study for what it'd look like during 6-9am for summer time.
the 9am shade study for summer they did show, looks like the shadows just barely clear my roof, hence the estimate...

on the other hand, the guy from university of san diego wrote me back!
said someone will contact me form their office, i hope to hear back soon.


wwhitney wrote:
dyyuan wrote: that being said, if we assume 1.83kwh lost * 180 winter days and about 4kwh lost * 180 summer days, it'd be about 1050kwh lost a year.
Summer loss should be less than winter, because the sun is higher in the sky.

Cheers, Wayne

QueenBee
Posts: 1564
Joined: Sun Aug 08, 2010 5:14 pm
Delivery Date: 20 Jun 2011
Leaf Number: 2062
Location: Portland

Re: new house block my solar panel...

Sat Feb 14, 2015 2:09 pm

dyyuan wrote:I was going off my historical data, and seems during summer time, i start getting power as early as 6am.
The system might wake up at 6 am but how much power does it really generate between 6 and 9 am? Then depending on the obstruction it's not going to completely block all of the sun so even then it would be partial blocking. A proper solar path analysis would be able to calculate the total loss.

dyyuan
Posts: 48
Joined: Mon Jun 27, 2011 8:51 am
Delivery Date: 11 Jun 2011
Leaf Number: 3883
Location: SF Bay Area

Re: new house block my solar panel...

Thu Feb 19, 2015 10:17 am

looks like the developer changed their plan pretty dramatically.

instead of 32 units, they now have only 27, and will have 4 two story single family house near us instead of 3 stories.

it was a combination of neighborhood input and the design committee's feedback...we were all very surprised this happened so quickly and how much change they made.

thanks all.

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