Solar mandatory for newbuild from 2027

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dan_b
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Location: SW London

Solar mandatory for newbuild from 2027

#1

Post by dan_b »

https://www.theguardian.com/environment ... nd-by-2027

Let's hope the big building companies don't just do the bare minimum tick-box installs, or hopelessly compromised systems with inherent shading.
Tesla Model 3 Performance
Oversees an 11kWp solar array at work
AE-NMidlands
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Re: Solar mandatory for newbuild from 2027

#2

Post by AE-NMidlands »

dan_b wrote: Thu May 01, 2025 1:07 pm https://www.theguardian.com/environment ... nd-by-2027

Let's hope the big building companies don't just do the bare minimum tick-box installs, or hopelessly compromised systems with inherent shading.
You beat me to it!
Almost all new homes in England will be fitted with solar panels during construction within two years, the government will announce after Keir Starmer rejected Tony Blair’s criticism of net zero policies.
Housebuilders will be legally required to install solar panels on the roofs of new properties by 2027 under the plans.
The policy is estimated to add between £3,000 and £4,000 to building a home but homeowners would save more than £1,000 on their annual energy bills, according to the Times.
and for once the Times is correct: My annual bill has dropped from £2.5k down to just over £1k (all gas), back to the amount it was in 2020, although our useage has dropped slightly.
2.0 kW/4.62 MWh pa in Ripples, 4.5 kWp W-facing pv, 9.5 kWh Givenergy batt
30 solar thermal tubes, 2MWh pa in Stockport, plus Congleton and Kinlochbervie Hydros,
Most travel by bike, walking or bus/train. Veg, fruit - and Bees!
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Stinsy
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Re: Solar mandatory for newbuild from 2027

#3

Post by Stinsy »

To save £1000 a year at 20p/kWH means a 5kWp array.

That is more than I expected and will be pretty decent for the people who live in those houses!
12x 340W JA Solar panels (4.08kWp)
3x 380W JA Solar panels (1.14kWp)
6x 2.4kWh Pylontech batteries (14.4kWh)
LuxPower inverter/charger

(Artist formally known as ******, well it should be obvious enough to those for whom such things are important.)
AGT
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Re: Solar mandatory for newbuild from 2027

#4

Post by AGT »

Persimmon chucking 3 panels per house around my way..
Better than nothing but could be the whole roof, it probably ticks an EPC box
AE-NMidlands
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Re: Solar mandatory for newbuild from 2027

#5

Post by AE-NMidlands »

AGT wrote: Thu May 01, 2025 2:08 pm Persimmon chucking 3 panels per house around my way..
Better than nothing but could be the whole roof, it probably ticks an EPC box
I have noticed very variable numbers of panels on sister new-builds. It made me wonder whether the house came with maybe a couple as standard (so all the trunking/ducting and inverter/(potential?) battery locations would be installed or allowed for) and then the purchaser could ask for more panels and a bigger inverter if they paid an extra amount...

Another possibility is that some of the buildings are apartments and it is the same kWp, but per dwelling.
2.0 kW/4.62 MWh pa in Ripples, 4.5 kWp W-facing pv, 9.5 kWh Givenergy batt
30 solar thermal tubes, 2MWh pa in Stockport, plus Congleton and Kinlochbervie Hydros,
Most travel by bike, walking or bus/train. Veg, fruit - and Bees!
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Stinsy
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Re: Solar mandatory for newbuild from 2027

#6

Post by Stinsy »

AGT wrote: Thu May 01, 2025 2:08 pm Persimmon chucking 3 panels per house around my way..
Better than nothing but could be the whole roof, it probably ticks an EPC box
It lets them skimp on insulation elsewhere!

I see houses with enough room for a dozen panels fitted with 5. One row of 3 and a row of 2 beneath. How hard would it've been to fit two rows of 3?
12x 340W JA Solar panels (4.08kWp)
3x 380W JA Solar panels (1.14kWp)
6x 2.4kWh Pylontech batteries (14.4kWh)
LuxPower inverter/charger

(Artist formally known as ******, well it should be obvious enough to those for whom such things are important.)
AE-NMidlands
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Joined: Wed Jun 02, 2021 6:10 pm

Re: Solar mandatory for newbuild from 2027

#7

Post by AE-NMidlands »

Stinsy wrote: Thu May 01, 2025 2:51 pm
AGT wrote: Thu May 01, 2025 2:08 pm Persimmon chucking 3 panels per house around my way..
Better than nothing but could be the whole roof, it probably ticks an EPC box
It lets them skimp on insulation elsewhere!

I see houses with enough room for a dozen panels fitted with 5. One row of 3 and a row of 2 beneath. How hard would it've been to fit two rows of 3?
Does 5 panels fit with a 2kW inverter? Maybe there's a step-change in price if you go bigger...
2.0 kW/4.62 MWh pa in Ripples, 4.5 kWp W-facing pv, 9.5 kWh Givenergy batt
30 solar thermal tubes, 2MWh pa in Stockport, plus Congleton and Kinlochbervie Hydros,
Most travel by bike, walking or bus/train. Veg, fruit - and Bees!
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Stinsy
Posts: 3610
Joined: Wed Jun 02, 2021 1:09 pm

Re: Solar mandatory for newbuild from 2027

#8

Post by Stinsy »

AE-NMidlands wrote: Thu May 01, 2025 2:56 pm
Stinsy wrote: Thu May 01, 2025 2:51 pm
AGT wrote: Thu May 01, 2025 2:08 pm Persimmon chucking 3 panels per house around my way..
Better than nothing but could be the whole roof, it probably ticks an EPC box
It lets them skimp on insulation elsewhere!

I see houses with enough room for a dozen panels fitted with 5. One row of 3 and a row of 2 beneath. How hard would it've been to fit two rows of 3?
Does 5 panels fit with a 2kW inverter? Maybe there's a step-change in price if you go bigger...
I don't know the reason. I guess that was enough solar capacity to save enough EPC points to fit thinner insulation...
12x 340W JA Solar panels (4.08kWp)
3x 380W JA Solar panels (1.14kWp)
6x 2.4kWh Pylontech batteries (14.4kWh)
LuxPower inverter/charger

(Artist formally known as ******, well it should be obvious enough to those for whom such things are important.)
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