Agree and I only turn on the vertical axis for snow season. For Offgrid
the vertical axis is really not needed except for snow in my opinion.
Cheers!
Dave Angelini Offgrid Solar
"we go where powerlines don't"
[5]https://offgridsolar1.com/ [6] [5]
e-mail [email protected]
text 209 813 0060
On 2024-12-09 6:55 am, Dana Orzel via RE-wrenches wrote:
My Wattsun trackers are programmed to go as steeply vertical as they
can for the winter and it's dramatic comparing how quickly my array is
clear organically versus other assorted angles angle is critical
Dana Orzel
C: 208.721.7003
E- [email protected]
On Dec 8, 2024, at 7:45 AM, Daryl DeJoy via RE-wrenches
<[email protected]> wrote:
On my own arrays in Maine, I always tilted the old Direct Power and
Water top of pole mounts to the maximum 60 degrees and spent half an
hour giving them a good coat of Rain-X in the late fall. They seemed to
shed snow much better until the later snows in March when I was
unwilling to get back up there and recoat.
Daryl DeJoy
NABCEP Certified PVIP since 2006
Island Energy Storage
[1]
Virus-free.www.avast.com [1]
On Sun, Dec 8, 2024 at 9:05 AM david quattro via RE-wrenches
<[email protected]> wrote:
Here is a very interesting video about vertically mounted bifacial
modules - performing surprisingly well.
https://www.youtube.com/watch?v=xD1MT-ek05w
On Sat, Dec 7, 2024 at 4:36 PM John Blittersdorf via RE-wrenches
<[email protected]> wrote:
I'm starting to think that Vertical panels are the only sure fire way
to keep them clear. I did a small cabin years ago with 2 panels on the
south wall of the cabin. All they wanted is a few lights and cell
phone charging
and rarely used in the winter. It worked great. Their Trace 1200 watt
inverter was turned off when they were not there and the C40 kept the
batteries charged over the winter without any problems. Now I am
stressing over an unreachable camp on an island (you may know this one
Kirk) where I updated a 12V system with outback inverter and about 1kw
of solar which had been shut down in the winter months. I replaced the
inverter with
a VFX3648, added an FM100, Installed 5 kw of PV on a ground mount at 45
degrees (mistake- should have done 60 degrees or more with more space
at the bottom but assumed not much snow there, all to run a Starlink
and Optics monitoring and lots of cameras. 60 days into this saga
today at 4 pm, the signal was lost. Is it snow or ice on the panels, or
just lack of enough sun (which has been minimal) which caused low
battery cutoff. Batteries are new AGMs and I set cutoff at 45.2. I
didn't want to run them too low. If I had some of the panels vertical
and 4' above the ground, I could probably be assured that snow would
not stay on long. Our problem here in Vermont is that when the clear
weather arrives, it usually comes with frigid cold and ground and pole
mounts are kept frozen by the ambient temperature until the sun can
warm them up but that doesn't happen with 6" on snow on the face. Only
above freezing
temperatures or still air with intense sun will clear them. I'm
working on a ground mount now that was started by a previous owner of a
property where the base for the ground mount array is a post and beam
substructure 4 to 8 feet above the ground. I'm thinking about putting 4
panels vertical and 4 at 45 degree angle on the north edge of the
structure and 8 panels at a summer angle on the South edge with
adequate space for snow shedding. . We have a temporary array at
Approx 35 degree angle that has somewhat shed the snow but with no
space for snow buildup, the shedding stops.
I am planning to build a fence around my garden this summer with PV
mounted vertically with the stacks of 110 watt modules I have
accumulated from repowering pole mounts. South and North side of garden
facing south and the east and west sides facing east and west. Any
thoughts on this crazy idea?
John Blittersdorf
Off Grid Vermont
On Fri, Dec 6, 2024 at 1:51 PM Dana Orzel via RE-wrenches
<[email protected]> wrote:
Having installed at up to 13,200' elevation (60° rack mount) and in
snow country for most of most of 37 years and dealing with
installations by others that almost or completely come off the roof
here is my 0.02:
Low angle roofs less than 35deg seem to take on most of the damage
incidents. Avalanches are most prevalent at 32-35+deg. Avys tend not to
slide at less than 32 deg.
Is the lower edge of the array shaded or partial shade on part of the
array with the low angle winter sun? This allows for ice up on the
bottom edge or on a section of the array.
Is there a drop zone for the snow? I use 5' min below the leading edge
for a mountain install I would increase this to higher.
I know this sounds obvious - Is there a snow fence or obstruction (door
shed roof) below the array?
I now install esp. on lower angle roofs a mid-third rail & use 50% more
contact to the roof points (cheap array life insurance).
If using a micro inverter or optimizer - attach this to the panel so it
flexes with the panel if necessary not the rail mount system. Watch out
for bolts that stick up close to the back sheet.
Happy Hollar Daze all!
_________________________________________________________
Dana Orzel GREAT SOLAR WORKS!
C - 208.721.7003 E - [email protected]
W - www. greatsolarworks.com [2] www.solarwork.com [3]
_"Responsible Technologies for Responsible People since 1988!"_
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