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how to facilitate PV at future date?


CalvinHobbes

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So we are out of the ground and have a lot of building to do. With prices being what they are and inflation, we are focusing on the essentials. We would however like to put in PV at a future date and read the other day an article about a new way of printing them which should make them cheaper in the future and presumably fit on lighter roofs?.

So I guess it makes sense to leave whatever wire/cable/emt in through the wall. Any tips? If we had green deal in NI I would be tempted.

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I doubt it, in the future you'll need to hire scaffolding which will wipe out any savings. Panels are now well less than £100 each, so no longer the dominant cost factor - inverters, optimisers, mounting systems and installation etc combined cost more than the panels. 

 

My system cost £5k and the payback period is currently 5 years. The sooner you get it, the sooner you get the benefits.

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8 minutes ago, CalvinHobbes said:

read the other day an article about a new way of printing them which should make them cheaper in the future and presumably fit on lighter roofs?.

I think I read that article 15 years ago.

Don't hold your breath.

 

Have you compared the price of roof integrated PV compared to tiling/slating.

Bear in mind that you will have scaffolding up anyway.

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Plan where the panels will go- roof/ground mount.

 

plan route from above to inverter location

 

plan route from inverter to mains position.

 

allow for data cabling, plan for batteries, plan for running some loads from solar diverted, immersion/heater etc and future proof wiring

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5 hours ago, Dillsue said:

Interesting. Can you share make, wattage and where youre buying them??

Hadn't realised prices had gone up so much in the last 2 years. I bought JA solar 345w panels for £90, I see they are now more like £140.

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4 hours ago, Conor said:

Hadn't realised prices had gone up so much in the last 2 years. I bought JA solar 345w panels for £90, I see they are now more like £140.

Yep, prices shot up in spring last year with the rise in the price cap. If you bought before then everything would have been much cheaper

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27 minutes ago, Marvin said:

I bet the trees were cheaper to buy 20 years ago!

Why would anyone pay for a tree.

Just dig up one the council has recently planted.

What we pay our rates for isn't it.

Can also pick up a nice, sturdy bench seat.

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What are you building, single, two storey?

plant room?

 

avIlable size roof?

location of potential equipment?

gibe this some thought and get a quote from a local installer.  
 

you can always add cabling now, equipment later.

 

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  • 4 weeks later...
On 13/04/2023 at 19:15, TonyT said:

What are you building, single, two storey?

plant room?

 

avIlable size roof?

location of potential equipment?

gibe this some thought and get a quote from a local installer.  
 

you can always add cabling now, equipment later.

 

I’m also interested in installing at a later date if I stay in the new house.  What cabling is required to prime the house ready for installation ? 

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Just now, Canski said:

I’m also interested in installing at a later date if I stay in the new house.  What cabling is required to prime the house ready for installation ? 

Why bother with cabling. Just make sure there is an easy route that cables can be run through.

Usually there will be 2 pairs of 4mm DC cables from the modules, and anything from 2.5 to 6mm T&E for the inverter to the Consumer Unit.

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1 minute ago, Canski said:

I just thought that it would save any disruption in the future if the cables were already installed and coiled up in a neat loop. 

The installer may not accept them.

I would not trust someone pointing at some old cables while saying 'use them'.

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