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Old 03-09-2016, 08:15 PM   #1
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Default Oops!

Contractor taking trees down at a solar site I'm working on had a little problem. Only good thing is the mounts look ok.
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Old 03-09-2016, 08:23 PM   #2
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Which begs the question, "what tree's"?
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Old 03-09-2016, 08:24 PM   #3
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I hope he has insurance.

Is that a 4" pipe?
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Old 03-09-2016, 08:37 PM   #4
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I hope he has insurance.

Is that a 4" pipe?
He said that he would most likely pay it outright. It's going to be around $500. The pole is another story. The same contractor was to install a 6 in sch 40 pipe. When I got there to install the mount, I found he had installed a 6 in tube, not pipe. So I had him put a cage of rebar inside the tube and fill it with concrete. I then modified the mounting cap to fit the smaller diameter.

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Which begs the question, "what tree's"?
There were some tall pine trees to the north of the panels. About 50 feet away.
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Old 03-09-2016, 08:39 PM   #5
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How big is the site?
This is the 2MW, 6 acre site I worked on last Winter. That's me tugging into inverter cab. at -5F windchill at RIT. We had to check with cable manufacturer before pulling at that temp, we were good to -13.
It was cold last year, didn't get above freezing once the whole month of Feb. Looooong-azz 8 hour days!



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Old 03-09-2016, 08:50 PM   #6
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How big is the site?
This is the 2MW, 6 acre site I worked on last Winter. That's me tugging into inverter cab. at -5F windchill. We had to check with cable manufacturer before pulling at that temp.
It was cold last year, didn't get above freezing once the whole month of Feb.

It's someone's house. 1kW now and another 3kW pole going in this spring. I'd don't work on the massive sites. Small stuff, a lot of off grid systems. My largest was 12kW grid tie and the smallest was a 750 watt off grid on an island.

Windchill doesn't effect the temperature of objects unless you are trying to heat them.
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Old 03-09-2016, 08:58 PM   #7
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someone needs a >>>>



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Old 03-09-2016, 09:02 PM   #8
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Windchill doesn't effect the temperature of objects unless you are trying to heat them.
No, but it can affect your mood!!!
Actual temps were running around 0 - 5 degrees F. Below a certain temp, you can damage insulation unspooling it.
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Old 03-09-2016, 09:05 PM   #9
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They don't put 'em on residential roofs in MN?

Our resi crew at work:


15kW, 60 panel residential, grid tied.



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Old 03-09-2016, 09:17 PM   #10
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What happens when they get 3' of snow on them?
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Old 03-09-2016, 09:25 PM   #11
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What happens when they get 3' of snow on them?
In my pic of the tugger, you can see the snow shedding/melting off the panels at brutal cold temps on an overcast day. And the F-ing things are live as soon as the Sun hits 'em, need to be very careful with terminating commercial arrays where the voltage summing J-boxes are at 900vdc. If 3" could somehow stick to them, total kW output would be decreased (Sun shines thru snow). Still free power!

http://blog.solarcity.com/how-snow-a...r-power-system
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Old 03-09-2016, 10:21 PM   #12
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They don't put 'em on residential roofs in MN?

Our resi crew at work:


15kW, 60 panel residential, grid tied.


That's not 60 panels, are there more mounted elsewhere? As far as roof mounting, with no way to clear those panels, they would be covered in snow here. Plus rapid shutdown adds to the cost when installed on a building. Then there's the holes in roof issue. In the country, land is not a premium like the city. So pole mounts make better sense.
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Old 03-09-2016, 10:34 PM   #13
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That's not 60 panels, are there more mounted elsewhere? As far as roof mounting, with no way to clear those panels, they would be covered in snow here. Plus rapid shutdown adds to the cost when installed on a building. Then there's the holes in roof issue. In the country, land is not a premium like the city. So pole mounts make better sense.
The whole back-side of the house and garage are covered, 20 on garage, 40 on the house total. They are almost self-cleaning these days, the way they are manufactured. Snow slides off. And we get the same kind of lake-effect snow here that Buffalo NY gets 60 miles west of here. We employ an actual roofer on the crew as well. No leaks in 5 years so far

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Old 03-09-2016, 10:40 PM   #14
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Contractor taking trees down at a solar site I'm working on had a little problem. Only good thing is the mounts look ok.
Wait a minute. With all the Code hoopla about listed only ground clamps and so forth and so on chapter worth of drivel and it didn't explode and cause a super nova? Hold on a minute here backstay, they told us at code class that we were dealing with serious generator capabilities and to use extreme caution when installing pv ..................


Tell me at least one of the eight or so required disconnecting means (I lost count) did it's job....
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Old 03-09-2016, 11:39 PM   #15
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Wait a minute. With all the Code hoopla about listed only ground clamps and so forth and so on chapter worth of drivel and it didn't explode and cause a super nova? Hold on a minute here backstay, they told us at code class that we were dealing with serious generator capabilities and to use extreme caution when installing pv ..................


Tell me at least one of the eight or so required disconnecting means (I lost count) did it's job....
Tree may have vaporized upon contact with said panel!

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The whole back-side of the house and garage are covered, 20 on garage, 40 on the house total. They are almost self-cleaning these days, the way they are manufactured. Snow slides off. And we get the same kind of lake-effect snow here that Buffalo NY gets 60 miles west of here. We employ an actual roofer on the crew as well. No leaks in 5 years so far
That would never fly here as panels have to point mostly south.
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