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Author Topic: Stable  (Read 19932 times)
guydewdney
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« Reply #30 on: November 01, 2011, 08:29:47 PM »

No. None. Wash it standing in a  bucket of salty water, with a copper handled brush if you want - still no danger. If you are - the installers need shooting.
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smegal
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« Reply #31 on: November 01, 2011, 09:32:56 PM »

This evening I cleaned the sharp panels (10 off in a single string) with a 2 metre long Leifheit window cleaner using rainwater on the sponge. The glass was a bit grimy and had a few bird shots on it. I chose twilight, after the inverter had switched off, so that the voltage was at a minimum. Also, I wore wellingtons and rubber gloves as well as only holding the plastic handle. This was done while standing on an aluminium stepladder.
Was I in any danger? I did not turn of any isolation switches.
Stan


I don't think that you could have taken any more precautions to be honest.
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Justme
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« Reply #32 on: November 01, 2011, 10:14:16 PM »


I don't think that you could have taken any more precautions to be honest.

What about a chain mail Faraday cage suit?

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marshman
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« Reply #33 on: November 01, 2011, 10:47:35 PM »

I clean mine regularly in bright sunlight standing on the metal roof (earthed) they are mounted to  using a Aluminium handled extending window cleaning briush connected to a hosepipe. Why should there be any problem? unless the integrity of the panel , cables or connectors has been compromised?

Roger
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paul149
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« Reply #34 on: November 02, 2011, 07:50:11 PM »

And if they are/have been  compromised "the panel , cables or connectors" that is, you'll be the first to know (or not fume) as the case may be!
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3.5 kWp (14 x Sanyo H250E01 + SB3000TL) 225' (SW) at 35' Pitch Lat 51.30' (Bristol) Installed cost £2.63/Wp (Nov 2011) now with solarimmersion and 250L unvented dhw (Almost Zero gas input for DHW from Apr to mid Sep)
marshman
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« Reply #35 on: November 02, 2011, 09:57:03 PM »

And if they are/have been  compromised "the panel , cables or connectors" that is, you'll be the first to know (or not fume) as the case may be!

I have these things called eyes, Firstly keeping an eye on the daily output should show if the panels are basically OK, secondly looking at the panels to see if any are cracked or visibly damaged. Also the cabling/connectors are all underneath and shouldn't get wet anyway. All frames and metalwork is earthed - so like I said what's the problem? 500V is more likely to "leak" or "jump" to earth directly than connect to a wet nylon brush, up an aluminium handle, into my body, down my body through my rubber soles and then to earth.
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3.15kWpk (15xSharp ND210)/SB3000. & 3.675kWpk (15 x Suntech 245WD)/SB4000TL, 10kW GSHP driving Wirsbo underfloor heating from 1200m ground loops. 10' x 7' solar wall (experimental). Clearview 650 Wood Burning Stove. MHRV - diy retrofit. Triple glazing.
rogeriko
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« Reply #36 on: November 02, 2011, 10:39:47 PM »

To get a shock from your panels you have to have a circuit for the voltage to flow around. Just touching anywhere on your pv system will not give you a shock unless somewhere else there is a fault to ground, therefore creating a circuit for the voltage to flow. Seeing as the DC voltage is isolated from the mains the whole system behaves like an isolation transformer where you will not get a shock.
« Last Edit: November 02, 2011, 10:43:47 PM by rogeriko » Logged

stannn
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« Reply #37 on: December 05, 2011, 11:24:26 AM »


At 10.30am today there was a 20mm uniform layer of snow/ice on the panels and the inverter was showing 50W, in hazy sunshine, which I found interesting in itself. So I experimented by removing the deposit in stages from the series string of 10 panels. First I cleared 1 and 10, then 2 and 9, and so on. The output rose not at all until the last panel was completed and it jumped to 400W (in fairly steady light conditions).
One positive was that the ice slid away with the larch needles and grime, leaving the panels looking new.
I did wonder if we will hear of more numerous avalanches from roofs with PV as glass is smoother than roof tiles.
Stan
« Last Edit: December 05, 2011, 12:04:07 PM by stannn » Logged

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stannn
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« Reply #38 on: February 05, 2012, 09:46:56 AM »

The angle of dangle matters in another way. We had 6" of fine snow overnight and strong sun from early on today. The covering on my neighbour's 40 degree array had 80% self-cleared by gravity, after thawing, by 9am. My own 17 degree array, seen below, has not budged.
Stan

« Last Edit: February 05, 2012, 10:20:36 AM by stannn » Logged

2.45 kWp PV (Navitron supply), 40 evacuated tubes (Navitron supply), Clearview 650 log burner with back-boiler heating cottage and water, 2 off 50W border collies, 1 off 35W cat, 1 off 25W cat.
M
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« Reply #39 on: February 05, 2012, 10:23:03 AM »

The angle of dangle matters in another way. We had 6" of fine snow overnight and strong sun from early on today. The covering on my neighbour's 40 degree array had 80% self-cleared by gravity, after thawing, by 9am. My own 17 degree array, seen below, has not budged.
Stan



Good excuse to go and play in the snow then. Have you got a great big extendable thingie?

M.
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Just call me Mart.     Cardiff: 5.58kWp PV - (3.58kWp SE3500 + 2kWp SE2200 WNW)
stannn
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« Reply #40 on: February 05, 2012, 10:40:39 AM »

I can't be bothered struggling Mart. Let's see what happens when the sun gets higher.
Stan
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stannn
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« Reply #41 on: February 05, 2012, 12:51:41 PM »

I just went to drag the snow off the array with the window cleaner. It was easy. The positive thing, with anyone's system, is that the snow should have frozen around any dirt and carried it downhill off the panels.
Stan
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Richard Owen
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« Reply #42 on: February 05, 2012, 01:11:31 PM »

I just went to drag the snow off the array with the window cleaner.

Stan

Did you get flumped?
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stannn
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« Reply #43 on: February 05, 2012, 01:28:38 PM »

Yes.  Cry
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M
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« Reply #44 on: February 05, 2012, 03:46:11 PM »

I can't be bothered struggling Mart. Let's see what happens when the sun gets higher.
Stan

You succumbed!  extrahappy

M.
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Just call me Mart.     Cardiff: 5.58kWp PV - (3.58kWp SE3500 + 2kWp SE2200 WNW)
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