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Week 11 - Solar PV panels.


A quieter week this week but good progress nonetheless.

 

The main build focus this week has been on the south-facing single pitch roof which is to be covered using in-roof solar panels with slates around the boundary, then zinc facias to match the rest of the roof.

 

It seems the zinc roof guys don’t do slate roofs and the slate roofers don’t do zinc, so two roofing teams required.  Fortunately, both teams have been excellent: professional, tidy, friendly and turning up when they say they will.  All you could ask for really.  Also fortunately, the slate roofers (Pete and Dave from G M Spicers) will fit the solar PV panels under the guidance of our electrician Nick.

 

And that has been the main activity this week - roofing battens and then the solar PV panels.  (I should just give a mention to Travis Perkins who supplied the cleanest, straightest 2 x 1 battens I have ever seen, barely a knot anywhere.  It’s a shame they’re florescent yellow - I wouldn’t be surprised if they glow in the dark.)

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The solar panels are by Solfit and clip together to form a watertight roofing surface - no trays, they just fit straight on the roofing battens.  They’re about 1790 x 1220mm and weigh 26kg each, so getting them on roof is no easy matter but the Pete and Dave seemed to manage ok.  We have 35 landscape format panels (5 rows of 7) at 425w each giving 14.8kW total generating capacity.   There are no doubt cheaper panels available but we have saved 77m2 of slate or zinc roofing, so that helps the economic case.

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By the end of the week, all the panels were on and the team had started to fix the slates around the edge so we can see how that will look.

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Also this week the zinc roofers stripped off the protective film from most of the roof so we can see that now and I have to say it looks really smart.

 

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Aside from the actual build work, we’ve made good progress on planning future activity with an number of trades now provisionally booked in including: UFH fix, screed, floor tiling, external rendering, airtightness test, decorating (single-colour spray all through), and bathroom fix, courtesy of my brother Chris!  (Yes, there are lots of other activities booked in too - but we didn’t book them this week!)

 

The next few weeks remain very busy (hopefully) so watch this space for more progress…  Our windows and doors are due to be installed on Thursday and Friday, so if you see Kevin McCloud in the vicinity of north Dorset, please send him away!

 

 

Dashboard:

 

Contractor days on site this week: 10

Contractor days on site since build start: 166

 

Budget: No real change, running slightly over. I keep finding things I’d forgotten to include (e.g. decorating!). But I also realise I haven’t factored in our VAT reclaim yet.  So overall, all ok good.

 

Plan: On track to move in by Easter 2026.

 

Issues and worries closed this week:

 

Current top issues and worries:

  • Scaffolding - unresponsive scaffolding company.  The scaffolding needs to come down in two weeks time but I’m worried that we’ll be used as free storage and thus be held up.
  • Scheduling future deliveries: insulation, battening, cladding, render boards, MVHR, UFH kit, ASHP, HW cylinder… all due in the next six five weeks.
  • Like 7

6 Comments


Recommended Comments

mjc55

Posted

So impressed with your progress so far.  Lets hope that it continues in the same vein.

  • Like 2
Roger Cross

Posted

All looking great, how much output are you hoping for from the solar PV? Have you given Mrs V her gardening budget yet😂 All the best, Roger and Angela

  • Like 1
Benpointer

Posted

50 minutes ago, Roger Cross said:

All looking great, how much output are you hoping for from the solar PV? Have you given Mrs V her gardening budget yet 😂  All the best, Roger and Angela

Haha thank you so much!  I knew there could only be one @Roger Cross 😁 

 

Re the PV panels: we have 14.8kW of panels from which we'd hope to generate about 14 to 15,000 kWh per year (this based on our experience with the previous 4kW set-up at Ancombe). We are limited by the DNO to a 7kW export cap but we'll have 20kWh of batteries and should be able to export most of what we generate each day by spreading the export over the whole day.  

 

That's the theory anyway. 

 

I used this tool - a bit clunky but detailed.

https://re.jrc.ec.europa.eu/pvg_tools/en/#api_5.3

 

Garden budget...  Er 😬   How much is a few packets of seeds anyway? 🤣

 

 

  • Like 1
joth

Posted

That's a neat in-roof install method, great to see new innovations for making neat and cost efficient installs. ( I say new, maybe this is old hat but it's 6+ years since I researched RIS for my own install)

Using battery to smooth out export within your export cap is excellent idea, but doing so optimally is an interesting problem in sunshine and  price forecasting. Do you already have tech solution in mind for that?

 

 

Benpointer

Posted

18 minutes ago, joth said:

That's a neat in-roof install method, great to see new innovations for making neat and cost efficient installs. ( I say new, maybe this is old hat but it's 6+ years since I researched RIS for my own install)

Using battery to smooth out export within your export cap is excellent idea, but doing so optimally is an interesting problem in sunshine and  price forecasting. Do you already have tech solution in mind for that?

 

 

Er no... that's a winter project 😂  Good point though - needs some thought.

Kelvin

Posted

29 minutes ago, joth said:

That's a neat in-roof install method, great to see new innovations for making neat and cost efficient installs. ( I say new, maybe this is old hat but it's 6+ years since I researched RIS for my own install)

Using battery to smooth out export within your export cap is excellent idea, but doing so optimally is an interesting problem in sunshine and  price forecasting. Do you already have tech solution in mind for that?

 

 

Agreed a very neat integrated looking install. Looks similar to some of the new builds on the road to Dundee. They look like part of the roof rather than plonked on top of the roof. 

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