BMW Garage | BMW Meets | Register | Today's Posts | Search |
02-23-2021, 04:20 PM | #2 |
Slow.
3791
Rep 7,158
Posts
Drives: Single Turbo N54 on Meth!
Join Date: Jun 2012
Location: Boston, MA
|
Location?
|
Appreciate
0
|
02-23-2021, 05:19 PM | #3 |
Major General
4282
Rep 5,729
Posts
Drives: 2019 M2 Competition
Join Date: Nov 2007
Location: Orange County, CA
|
|
02-23-2021, 05:46 PM | #4 |
Major
14089
Rep 1,336
Posts
Drives: Porsche 993
Join Date: Mar 2020
Location: Dog Lake, South Frontenac, Ontario Canada
|
|
Appreciate
1
infinitekidM2C4281.50 |
02-23-2021, 07:19 PM | #6 |
Major General
951
Rep 5,552
Posts |
Both roofs have panels. Upper system is SREC that's like 7-10 years old, lower is 2 years old and it's net metering. Notice that there is no snow on lower roof and upper roof has been covered with snow for like 2 months now. Both have same angle and same sun exposure. The question is wtf?
Ps. I am not the original owner, both systems installed by same company |
Appreciate
0
|
02-23-2021, 07:24 PM | #7 |
Major General
951
Rep 5,552
Posts |
I think I know what the issue is, but I wonder if that's an install error. And would it be something that I should get fixed under warranty perhaps? I don't want to call the company and bitch about it if nothing can be done
|
Appreciate
0
|
02-24-2021, 07:25 AM | #8 |
Recovering Perfectionist
19172
Rep 982
Posts |
1) The roof pitch on the upper roof appears to be less than the lower roof.
2) There appears to be a pine tree shading the upper roof at low (winter) sun angles. 3) Is there better insulation under the upper roof than the lower roof?????
__________________
Currently BMW-less.
|
02-24-2021, 08:01 AM | #9 |
Slow.
3791
Rep 7,158
Posts
Drives: Single Turbo N54 on Meth!
Join Date: Jun 2012
Location: Boston, MA
|
This.
__________________
|
Appreciate
0
|
02-24-2021, 08:09 AM | #10 | |
Major General
951
Rep 5,552
Posts |
Quote:
2. The tree doesn't give much shade to panels 3. Upper roof is actually warmer, lower roof has no insulation and no heat I think unlike lower roof, upper roof panels are way too far from the edge and snow and ice just massively builds up there which doesn't let anything slide down. It all start to melt during the day and just freezes into ice at night. I end up with huge ice dams on this side only Last edited by Kolyan2k; 02-24-2021 at 08:17 AM.. |
|
Appreciate
0
|
02-24-2021, 08:20 AM | #12 |
Major General
951
Rep 5,552
Posts |
I asked them sometime ago, they said don't worry about it and now my house is the only one with so much snow on the roof )) and its supposed to be the opposite because snow supposed to slide from panels easy
|
Appreciate
0
|
02-24-2021, 08:21 AM | #13 |
Lieutenant General
7418
Rep 11,885
Posts
Drives: MY24 G01 AW Msport
Join Date: Feb 2008
Location: L.I. NY
|
the only reason i can think of, is that panels are made of different material, providing heat to the roof??
|
Appreciate
0
|
02-24-2021, 08:24 AM | #14 | |
Brigadier General
5475
Rep 3,292
Posts |
Quote:
|
|
Appreciate
4
|
02-24-2021, 09:56 AM | #16 | |
Colonel
1674
Rep 2,756
Posts |
Quote:
I think there is something different in the two roofs, not just the mounting, whether it is insulation differences, heat in the building, slope of the roof or sunlight. Upper roof is covered in snow, lower roof has zero snow, even in the small areas on the side of the panels or below them. With as high as the sun still is in the picture and the shadow of the tree already on the roof, I think the lower roof is getting more sun, contributing to the problem.
__________________
2006 Z4M Coupe - ZHP knob, stubby antenna, clutch delay delete
Last edited by David70; 02-24-2021 at 10:59 AM.. |
|
Appreciate
1
vreihen1619172.00 |
02-24-2021, 10:04 AM | #17 |
Private (and reserved, existential)
8784
Rep 120
Posts
Drives: 2020 X3M40i; 2001 Z3
Join Date: Jun 2020
Location: Evergreen, CO
|
You might check the wind direction and intensity and whether the upper panels get cooled from normal wind and thereby less likely to melt off. Also, even on my roof, minor shade from trees can keep the panels from beginning the melting process and combined with cooling effects of wind could make the difference.
|
Appreciate
0
|
02-24-2021, 11:13 AM | #18 |
Slow.
3791
Rep 7,158
Posts
Drives: Single Turbo N54 on Meth!
Join Date: Jun 2012
Location: Boston, MA
|
What company installed them?
Is there shade on the roof in the other months of the year? I work in the MA solar industry...
__________________
|
Appreciate
0
|
02-24-2021, 02:06 PM | #19 |
Major General
951
Rep 5,552
Posts |
I am not sure about shade. Solarflair installed it. Zero production this month btw
Last edited by Kolyan2k; 02-24-2021 at 04:46 PM.. |
Appreciate
0
|
02-24-2021, 07:21 PM | #20 |
Colonel
7600
Rep 2,449
Posts
Drives: 9Y0 Cayenne S
Join Date: Mar 2019
Location: Einbahnstraße
|
Kolyan2k You have ice dams on the upper roof because you have less sun exposure on the upper roof. You have low/no production on the upper roof panels because they have snow on them, because they have less sun exposure.
Can you post an aerial photo of your house (Google Maps) with street names omitted to protect your anonymity, and including N-S-E-W orientation? |
Appreciate
0
|
02-24-2021, 08:24 PM | #21 | |
Major General
951
Rep 5,552
Posts |
Quote:
|
|
Appreciate
1
chassis7600.00 |
02-24-2021, 09:31 PM | #22 |
Colonel
7600
Rep 2,449
Posts
Drives: 9Y0 Cayenne S
Join Date: Mar 2019
Location: Einbahnstraße
|
Yes, perfect. To me I can envision plenty more shade on the upper panels because of the trees.
If you are willing, post three photos tomorrow, or on the next day of full sun, throughout the day: 8:00am 12:00pm 5:00pm taken from the same position as in post #6. Winter is the worst time of year for solar production due to the low position of the sun. It worsens any problems caused by marginal sun exposure. |
Post Reply |
Bookmarks |
|
|