Tue, 19 Dec 2023 06:01:34 +0000 http://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15906&Focus=270910#Comment_270910 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15906&Focus=270910#Comment_270910 Tue, 30 Oct 2018 16:37:22 +0000 jamesingram http://re.jrc.ec.europa.eu/pvgis/apps4/pvest.php

Without Fits it's about 1000kWh per kW installed per year south England ( a bit less actually)
Materials are around 50p/W
That £150 per year if you use it all at standard purchase rate of 15pkW

Anyone that can use all power generated
£4k for 4kW system (£2k to get it installed)
£600 electricity generated per year.
15p kWh
After 7 ish years everything it generates is free .
First 7 years electric at standard rate so no additional cost
DIY make that 3.5 years
System life 25 years minimum]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15906&Focus=270911#Comment_270911 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15906&Focus=270911#Comment_270911 Tue, 30 Oct 2018 17:24:58 +0000 djh http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15906&Focus=270912#Comment_270912 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15906&Focus=270912#Comment_270912 Tue, 30 Oct 2018 19:41:53 +0000 CWatters http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15906&Focus=270918#Comment_270918 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15906&Focus=270918#Comment_270918 Wed, 31 Oct 2018 11:55:30 +0000 Victorianeco http://re.jrc.ec.europa.eu/pvgis/apps4/pvest.php#

Gives me 4300kWh per annum using the default settings and changing the azimuth to 15deg (based on a 4kW system)

3.3kW per day in December and 19kW per day in June

I guess I would need to see how much in reality I'd actually consume in a day when the sun is out? At best it would be the fridge/freezer, washing machine, dishwasher and top up the immersion. Best way to calculate these?

I'm guessing the washing machine wouldn't run on 100% solar or would it? Not sure if it's a combination of solar and mains?]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15906&Focus=270919#Comment_270919 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15906&Focus=270919#Comment_270919 Wed, 31 Oct 2018 12:20:03 +0000 bhommels
If you are prepared to accept longer payback time, a bigger, more costly array will give you more power to make use of, however you should put systems in place to monitor & use the excess power.

Note that most high power household appliances are basically water heaters: washing machine, dishwasher, kettle (electric shower). Running (some of) these off the (solar powered) hot water saves energy even when the PV is not providing sufficient power at that moment.]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15906&Focus=270977#Comment_270977 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15906&Focus=270977#Comment_270977 Sat, 03 Nov 2018 14:06:16 +0000 Victorianeco
Which kit on ebay in particular do you recommend James?

If I could get an electrician to fit it, I guess I'd need to allow for scaffold and how many days labour do you think?]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15906&Focus=270979#Comment_270979 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15906&Focus=270979#Comment_270979 Sat, 03 Nov 2018 16:25:53 +0000 jamesingram https://www.ofgem.gov.uk/publications-and-updates/faq-announcement-prospective-scheme-closure
This looks good, REC are a quality brand from Norway,
caution this is just what popped up on a quick search. i've no direct experience of the seller, also just noticed , doesnt include mounting kit (£200ish)
https://www.ebay.co.uk/itm/4KW-SOLAR-PANEL-PV-KIT-SYSTEM-BEST-PRICE-IN-THE-UK-AND-EBAY/153104417387?_trkparms=aid%3D222007%26algo%3DSIM.MBE%26ao%3D2%26asc%3D20160323102634%26meid%3D8b54db1c38ee4c61aee04accf52b34e8%26pid%3D100623%26rk%3D4%26rkt%3D6%26mehot%3Dpp%26sd%3D173540599051%26itm%3D153104417387&_trksid=p2047675.c100623.m-1

4kW standard house, easier roof layout, if you know what your doing 2-3 men on roof 1 on electrics for a day.
Go for 2days x 2 men on roof and 2days x 1 inside to cover yourself , Its handy to have a 3rd man on the roof when fitting and carrying up the panels as theyre cumberson , which the guy inside can help with.]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15906&Focus=270980#Comment_270980 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15906&Focus=270980#Comment_270980 Sat, 03 Nov 2018 16:38:44 +0000 jamesingram https://www.ebay.co.uk/itm/Floureon-Electricity-Power-Consumption-Meter-Energy-Monitor-Watt-Kwh-Analyzer-UK-/183283997728
combine them with a overral monitor and youre get a good sense of what each item uses and overal flow up and down
https://www.ebay.co.uk/itm/BRAND-NEW-UNUSED-BRITISH-GAS-TREC-ENERGY-ELECTRICITY-ELECTRONIC-MONITOR-/163302334946

energy companies used to give them away free , might be worth a try or get a smart meter fitted as this will come with a similar wireless consumption display I believe.

Damons site is filled with useful info
start here
http://www.earth.org.uk/measuring-appliance-consumption.html
]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15906&Focus=270982#Comment_270982 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15906&Focus=270982#Comment_270982 Sat, 03 Nov 2018 18:58:48 +0000 skyewright Posted By: VictorianecoAre the FIT's being withdrawn completely or just for new sign ups?
Existing contracts should run for their specified duration.

The opportunity to signup for new contracts will cease.]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15906&Focus=270986#Comment_270986 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15906&Focus=270986#Comment_270986 Sat, 03 Nov 2018 21:23:29 +0000 Victorianeco
Can't seem to find anything..]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15906&Focus=270987#Comment_270987 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15906&Focus=270987#Comment_270987 Sat, 03 Nov 2018 21:46:11 +0000 Victorianeco https://www.ofgem.gov.uk/publications-and-updates/faq-announcement-prospective-scheme-closure

Found that so it seems one would get FIT for 20 years still!

Looks decent to me!?]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15906&Focus=270990#Comment_270990 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15906&Focus=270990#Comment_270990 Sun, 04 Nov 2018 08:05:01 +0000 Victorianeco
I don't have a driveway so charging an EV in the future would be ruled out. Battery storage is not cost effective. The FIT based on what I could in theory get is low.

Still not convinced at todays prices before even paying for an MCS fitter]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15906&Focus=270996#Comment_270996 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15906&Focus=270996#Comment_270996 Sun, 04 Nov 2018 20:43:01 +0000 jamesingram in the future the saving will only get better. with an ASHP you get the opportunity to use all your generation at the time its sunny and ASHP is on.
at 4300kWh generation per years you'll currently get
Gen 3.86p x 4300 =166
expo 5.24p x 2150= 112
total £278 pa index linked 20 x 278 = £5573 over 20 years
this doesnt include electricity saved
low estimate 50% (could be more if you set things up right) 2150kWh pa at 15p= £322 x 20 = £6450 over term
£4-5k to get an MCS install

£12,023 over 20 years
£5,000 capital so £7023 profit with return of capital = approx 4.4% interest rate ignoring energy price inflation]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15906&Focus=271000#Comment_271000 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15906&Focus=271000#Comment_271000 Mon, 05 Nov 2018 08:38:23 +0000 Pile-o-Stone Posted By: bhommelsThe point I was trying to make earlier is that if you are installing without FiT and you want the highest returns, the array should be sized such that you can consume (almost) all electricity produced.

How would you make this calculation with such a variable power source? Size the array so that it produces 100% of your requirement in winter, summer, spring, autumn, sunny days, rainy days, overcast days?

Do you size it with your current consumption in mind, or factor in the fact that you may buy an electric vehicle in future, or we may have to all install air conditioning systems due to climate change. Plus battery technology and costs are improving all the time, which will allow us to use more of our generation.

A large portion of the cost of solar is the installation, such as scaffolding and labour fitting the framing and panels, wiring up the array and connecting it to the house consumer unit. These costs are not proportional to the size of an array (for example, scaffolding is the same whether you fit 100w or 5kw of panels on the roof).

I'd always advise people to install the largest array that they can afford and that their roof allows so that they are future proofed.]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15906&Focus=271010#Comment_271010 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15906&Focus=271010#Comment_271010 Mon, 05 Nov 2018 11:46:18 +0000 bhommels The OP aimed at a DIY install, so I assumed scaffolding, labour to be free. Then the panels start to dominate the cost, and a smaller array will provide better returns.
If there is FiT on offer etc, I agree that the largest array you can accommodate is best.]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15906&Focus=271015#Comment_271015 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15906&Focus=271015#Comment_271015 Mon, 05 Nov 2018 19:33:28 +0000 Victorianeco https://www.moneysavingexpert.com/utilities/free-solar-panels/

I reckon there's a maximum of £300 saving to be had

I think I'll keep my cash in my stocks and share ISA and earn 10% per year. I'm happy to take my chances I think.

My personal opinion is that costs will come down even further anyway so will all balance out]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15906&Focus=271016#Comment_271016 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15906&Focus=271016#Comment_271016 Mon, 05 Nov 2018 20:10:55 +0000 djh Posted By: VictorianecoI think I'll keep my cash in my stocks and share ISA and earn 10% per year.
That's pretty optimistic. I hope you have good skills.]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15906&Focus=271017#Comment_271017 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15906&Focus=271017#Comment_271017 Mon, 05 Nov 2018 20:41:23 +0000 Victorianeco
Long term investments, compound interest and so on..

My wife also has a LISA which investing £4000 a year in gives her an automatic £1000 bonus. Ie 25%...

So yeah 10% is easily achievable as an average on what I invest]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15906&Focus=271021#Comment_271021 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15906&Focus=271021#Comment_271021 Tue, 06 Nov 2018 17:09:08 +0000 jamesingram do you know your annual.total electric use in kW and cost?
Do you know the kW usage per year or monthly of the ASHP.]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15906&Focus=271027#Comment_271027 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15906&Focus=271027#Comment_271027 Tue, 06 Nov 2018 18:30:21 +0000 Victorianeco
Not sure on annual usage exactly but we pay £85 a month and always end up in credit. No gas at the property either.

Heating is on 24/7 when required and flow temp is 30-40c depending on outside temperature.

Never measured the electric use of the ASHP in all honesty.]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15906&Focus=271036#Comment_271036 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15906&Focus=271036#Comment_271036 Wed, 07 Nov 2018 19:20:16 +0000 Victorianeco http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15906&Focus=271057#Comment_271057 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15906&Focus=271057#Comment_271057 Fri, 09 Nov 2018 19:04:22 +0000 Victorianeco
Who wants to fit some in South Wales for me then? 🤔]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15906&Focus=271072#Comment_271072 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15906&Focus=271072#Comment_271072 Sun, 11 Nov 2018 13:22:06 +0000 jamesingram have a chat with wind and sun they may know of a decent local installer]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15906&Focus=271073#Comment_271073 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15906&Focus=271073#Comment_271073 Sun, 11 Nov 2018 13:33:27 +0000 jamesingram annual bill 12 x £85 = £1020 approx £1000 say
take off ST = £930
average £0.16 per kW
so 5812 kW used per year
most will be for heating then HW]]>