Green Building Forum - What can i do with 3 damaged PV panels ? any ideas Mon, 17 Aug 2026 03:36:02 +0100 https://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 What can i do with 3 damaged PV panels ? any ideas https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8729&Focus=146959#Comment_146959 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8729&Focus=146959#Comment_146959 Fri, 25 May 2012 17:59:56 +0100 jamesingram What can i do with 3 damaged PV panels ? any ideas https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8729&Focus=148093#Comment_148093 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8729&Focus=148093#Comment_148093 Thu, 07 Jun 2012 17:38:28 +0100 jamesingram http://www.ebay.co.uk/itm/ws/eBayISAPI.dll?ViewItem&item=180296507747&clk_rvr_id=344090125608#ht_4702wt_1270

Just found this on Ebay , got me thinking about a Pv direct feed DC immersion again .

Any way of calculating potential output of say 2x250W panel direct DC feed to immersion via Pvgis and then finding potential input to immersion and HW
eg how long would it take to heat my 150l tank up :confused:]]> What can i do with 3 damaged PV panels ? any ideas https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8729&Focus=148095#Comment_148095 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8729&Focus=148095#Comment_148095 Thu, 07 Jun 2012 17:57:03 +0100 SteamyTea
150 kg of water raised by 40°C will take 7 kWh.
So your going to struggle with a 50 W input.]]> What can i do with 3 damaged PV panels ? any ideas https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8729&Focus=148101#Comment_148101 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8729&Focus=148101#Comment_148101 Thu, 07 Jun 2012 18:16:05 +0100 jamesingram on a good day.
Vmp = 76V Imp=6.9
so would that be 524.4W of power output under these conditons?
pvgis for 500W of panels for inverter type sys. give average daily output of 0.742kWh and best 1.48kwh in june]]> What can i do with 3 damaged PV panels ? any ideas https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8729&Focus=148104#Comment_148104 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8729&Focus=148104#Comment_148104 Thu, 07 Jun 2012 18:32:43 +0100 SteamyTea Posted By: jamesingramirr.800W/m2
That is the problem

Posted By: jamesingram0.742kWh and best 1.48kwh

So about 10 days and 5 days.]]> What can i do with 3 damaged PV panels ? any ideas https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8729&Focus=148107#Comment_148107 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8729&Focus=148107#Comment_148107 Thu, 07 Jun 2012 18:39:16 +0100 jamesingram ]]> What can i do with 3 damaged PV panels ? any ideas https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8729&Focus=148109#Comment_148109 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8729&Focus=148109#Comment_148109 Thu, 07 Jun 2012 18:44:35 +0100 SteamyTea What can i do with 3 damaged PV panels ? any ideas https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8729&Focus=148112#Comment_148112 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8729&Focus=148112#Comment_148112 Thu, 07 Jun 2012 18:52:30 +0100 jamesingram
mines been using approx 120kwh/week for HW and cooking ( any idea the est. for cooking use of gas)]]> What can i do with 3 damaged PV panels ? any ideas https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8729&Focus=148113#Comment_148113 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8729&Focus=148113#Comment_148113 Thu, 07 Jun 2012 18:56:50 +0100 SteamyTea Posted By: jamesingramany idea the est. for cooking use of gas
Plot the gas usage against the HDD data, where it crosses the y-axis is about what the non-heating usage is.]]> What can i do with 3 damaged PV panels ? any ideas https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8729&Focus=148123#Comment_148123 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8729&Focus=148123#Comment_148123 Thu, 07 Jun 2012 20:43:50 +0100 jamesingram I think Damons est. was 6-7kWh/day for cook/HW
my old flat with a A rated combi was around 40kWh/week so fit Damons est.
The new place has got a G rated floor boiler, gravity feed sys. with HW tank so not good but,

Haven't had the heating on for a month and still 100+kWh/w gas ( most this year in winters with heating on been 340kwh)

Seems something is not right ??]]> What can i do with 3 damaged PV panels ? any ideas https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8729&Focus=148124#Comment_148124 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8729&Focus=148124#Comment_148124 Thu, 07 Jun 2012 20:50:34 +0100 SteamyTea
100 kWh is enough to heat about 2 tonnes of water, so if your boiler is about 50% efficient it will do a tonne, or about 13 baths.
Or a shower that uses 10 lt/min running for 100 minutes (1 hour 40 minutes).]]> What can i do with 3 damaged PV panels ? any ideas https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8729&Focus=148125#Comment_148125 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8729&Focus=148125#Comment_148125 Thu, 07 Jun 2012 20:58:25 +0100 jamesingram What can i do with 3 damaged PV panels ? any ideas https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8729&Focus=148126#Comment_148126 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8729&Focus=148126#Comment_148126 Thu, 07 Jun 2012 21:03:06 +0100 SteamyTea What can i do with 3 damaged PV panels ? any ideas https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8729&Focus=148131#Comment_148131 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8729&Focus=148131#Comment_148131 Thu, 07 Jun 2012 22:06:41 +0100 jamesingram
1l water raised 80 degC
575 sec. via gas hob in pan with lid on , small burner so probably 1kW
In electric kettle 0.12kWh (via plug in meter)

back to the 13 baths for 1 tonne of water , 70l bath
at most 6 baths (460l) a week and 28 washing up bowls (112l) = 572l HW

so at best 25% HW sys. efficiency ?]]> What can i do with 3 damaged PV panels ? any ideas https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8729&Focus=148133#Comment_148133 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8729&Focus=148133#Comment_148133 Thu, 07 Jun 2012 22:26:15 +0100 jamesingram What can i do with 3 damaged PV panels ? any ideas https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8729&Focus=148136#Comment_148136 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8729&Focus=148136#Comment_148136 Thu, 07 Jun 2012 23:26:46 +0100 Ed Davies
At least 25 kWh of that could be the pilot light:

http://physics.ucsd.edu/do-the-math/2012/03/pilot-lights-are-evil/

Worth investigating (watching the meter closely).]]> What can i do with 3 damaged PV panels ? any ideas https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8729&Focus=148137#Comment_148137 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8729&Focus=148137#Comment_148137 Thu, 07 Jun 2012 23:31:31 +0100 DamonHD
Gas use over the last 2 months has been ~5kWh/d for cooking and DHW: heating went off at the end of March.

http://www.earth.org.uk/saving-electricity.html#meter2012

Rgds

Damon]]> What can i do with 3 damaged PV panels ? any ideas https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8729&Focus=148142#Comment_148142 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8729&Focus=148142#Comment_148142 Fri, 08 Jun 2012 07:58:03 +0100 Seret
Reading the meter over summer when you've got the heating off is the easy way, but if you've got weekly data already then plugging it into iMeasure will generate the graph SteamyTea was referring to. Obviously the more data you have the more accurate it's likely to be.]]> What can i do with 3 damaged PV panels ? any ideas https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8729&Focus=148226#Comment_148226 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8729&Focus=148226#Comment_148226 Fri, 08 Jun 2012 18:09:49 +0100 jamesingram what you boiler , a potterton kingfisher flor standing type ?
Starting to wonder if my meters miss reading , I'll monitor it for a few more weeks
i've lots of imeasure data for my last place and getting close to a year on the new place , re.HDD it usually slightly above the expected line in our new place as there's still plenty to do
some info on the project here http://www.greenbuildingforum.co.uk/forum114/comments.php?DiscussionID=6234&page=1#Item_29 needs an update if I can find the time.]]> What can i do with 3 damaged PV panels ? any ideas https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8729&Focus=270033#Comment_270033 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8729&Focus=270033#Comment_270033 Mon, 27 Aug 2018 12:44:35 +0100 mark_s There are some available locally with cracks and I'm pondering having a play]]> What can i do with 3 damaged PV panels ? any ideas https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8729&Focus=270295#Comment_270295 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8729&Focus=270295#Comment_270295 Wed, 19 Sep 2018 17:08:40 +0100 jamesingram But.. 6 years later I've 23 panels up on my roof and one got damaged some how about 2 years ago, looks like an air rifle shot or a stone perhaps and the toughened glass has all shattered It's actually only noticable on very sunny day and It points NW so only gets evening sun.
anyway its hard to get to, was an end of line product and working fine so I've left it til it fails.
Its on a solaredge inverter so acts individually.
You may find they are fine even with cracks in as the bonding compound will protect the cells below the glass]]>