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Author Topic: PV Installation Guidelines  (Read 41322 times)
DonL
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« Reply #15 on: February 02, 2011, 09:53:47 AM »

I informed my insurers about my original installation and it was simply noted on the policy. I recently informed them about the forthcoming phase 2 and have received a load of questions from the underwriters so I think the industry must be starting to understand the risks and taking it a bit more seriously.
Don
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rossi
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« Reply #16 on: February 25, 2011, 02:10:36 PM »

what is the minimum space needed to leave from the gutter so the rain water doesn't miss the gutter Huh??

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rondurrans
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« Reply #17 on: February 25, 2011, 03:28:59 PM »

I got this from somewhere - keep back at least 400mm from the ridge, gutters, edge(s):-


To prevent the wind getting under the panels
To prevent rain running off the panels and over the guttering.
To allow the installer access around the roof with roof crawlers
To prevent noise from wind flow around the array edge.
To avoid disturbance of cemented tiles at edge and ridge.
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rossi
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« Reply #18 on: February 26, 2011, 02:46:20 PM »

is it possible to get away with leaving only 200mm gap from the gutter  Huh
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Justme
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« Reply #19 on: February 26, 2011, 06:11:18 PM »

is it possible to get away with leaving only 200mm gap from the gutter  Huh



Wont that depend on the pitch of the roof?

Steep pitch faster run off = larger gap.
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GavinA
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« Reply #20 on: February 26, 2011, 06:32:41 PM »

is it possible to get away with leaving only 200mm gap from the gutter  Huh

depends on the height above the roof, strength of mounting structure, slope of roof, how windy the location is etc.

essentially it is possible, but you'd generally need to lower the height of the panels above the roof, and increase the number of brackets used on the bottom row, and possibly add an extra rail in to the bottom panels to mitigate the impact of the increased wind loading.

depending on the mounting system used you may also have to be quite careful about the choice of brackets to match with the tiles to get you the 20cm - ie with shuco systems using the bottom antislide clip below the panel there's not really any room to manouver the panel vertically once the rail's in position, so you need to look at where the roof fixing / rail / clip is actually going to locate the panel in relation to the tiles rather than just assuming that you can locate a panel 20cm from the bottom.
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rossi
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« Reply #21 on: March 02, 2011, 05:40:58 PM »

hi,
pitch is about 43-45 degree, rosemary tiles, area is not prone to high winds but cannot rule them out, panels to go are sanyo 215s
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mikepe12
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« Reply #22 on: May 31, 2013, 11:46:10 AM »

Hi all, sorry to drag up this old chestnut.

Does anyone know if the 3rd edition of the installation guide was ever published ??

And where can I download it ??

All I can find on the web is its coming, but it seems to have been coming for a long time.

Thanks,  Mike
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Ted
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« Reply #23 on: May 31, 2013, 03:22:41 PM »

http://www.microgenerationcertification.org/images/PV%20Book%20ELECTRONIC.pdf
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mikepe12
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« Reply #24 on: June 05, 2013, 10:57:45 AM »

Thanks Ted, much appreciated.

Mike
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JohnP2014
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« Reply #25 on: March 17, 2014, 05:17:48 AM »

what is the minimum space needed to leave from the gutter so the rain water doesn't miss the gutter Huh??



On my somewhat crammed 30 degree roof and 200 mm ish margin, it is  snow that is the problem. It melts early on the black panels and slides down to form a "drift" at the bottom of each of three rows, This (re)frozen lump can break away as a near lethal avalanche and jump the bottom tiled margin of the roof.
Fortunately I have a bungalow and have devised a telescopic brush for removing this snow before it slides to create a "drift".
If you have kids or grandchildren take care.
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puredrivebatteries
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« Reply #26 on: May 12, 2016, 10:02:37 AM »

Very Useful advice, thank you.
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codeatext
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« Reply #27 on: December 02, 2016, 10:54:57 AM »

Its all well & good bringing out all these new "guidelines" but how do they plan on letting them people that need them?

Just putting it on some obscure professionals web site wont let many people know.

This is my first post and don't know if this is the best forum.

Earlier this year I had a PV system installed by a company that works throughout the UK. Although their installation diagram showed a DC Isolator switch between the panels and the inverter this was not fitted.  I was not happy with this but they assured me that it was not necessary because there is a switch on the inverter. However, I was recently talking to local company about re-configuring the panels. They insist a separate DC Isolator should have been fitted before the system was approved. So I am confronted by two people each adamant that they are correct. Looking on this forum most of the posts on this issue are unclear. Personally, I want the switch but its a question of who pays.  Could anybody give me clear advice?
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M
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« Reply #28 on: December 02, 2016, 11:34:31 AM »

Hiya and welcome. Bit of a long shot, but does it happen to be a SolarEdge system? It's just that I understand that these don't need a DC isolator, though I may be wrong about that.

Martyn.
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Just call me Mart.     Cardiff: 5.58kWp PV - (3.58kWp SE3500 + 2kWp SE2200 WNW)
Ted
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« Reply #29 on: December 02, 2016, 12:25:35 PM »

If the switch on the inverter isolates the DC input then you don't need a separate switch. What model of inverter do you have?
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