Grants available for all electric house we are buying and plan to extend. reducing Co2 emissions.

Ectophile

How many amps is the 1 phase supply?  A 100A supply should cope easily with a 7kW charger.  A 60A supply, probably not if you have electric heating as well.

ProfessorChao5

Gerry1 said:

Chave0791 said:

Air storage heat pumps are 3-4 CoP

also its 20% more efficient to have underfloor heating on the whole ground floor of the house, acting like one giant rad, rather than using normal radiators.

Is there any evidence to support these claims?  Both seem a bit exaggerated.  Larger radiators are needed to work with ASHPs' lower flow temperatures, but that does not make for greater efficiency.

Chave0791 said:

a lot of new builds moving forward will be electric only using Air storage heat pumps.

True, but that's because of government action, not consumer preference.

Chave0791 said:

in answer to Gerry1- having Air storage heat pumps, electric car charges and solar panels will massively increase the value of my property.

I fear that most buyers may not share your enthusiasm, especially when they find that the running costs of the ASHP will be twice that of a gas boiler.  Similarly, if they're not at home during the day they may not be keen about the very slow warm up characteristics.  Have you spoken to any estate agents?

The lower flow temperatures are just to enable to ASHP to operate more efficiently. There is tons of evidence to support ASHP’s and the efficiency claims providing everything is installed and specified correctly. 

Is there was two comparable homes but one was stuffed full of Renewablea and the other wasn’t I know I’d choose the one full of renewables .

ProfessorChao5

Chave0791 said:

thank you for the replies everyone. i have been doing extra homework and speaking to people that have them and install them
i have a lot of government grants to lean on- £5000 for installing Air storage heat pump. also the government will pay me £1000 per year having it. (up to 7 years)
Air storage heat pumps are 3-4 CoP. so for every Kwh of electrical energy that is used to power the pump it generates 3-4 Kwh of heat energy, normal radiators its 1kwh in - 1 kwh out, so far more efficient and cost effective. also with tariffs like Octopus Go its 5p /KWH between 12.30-4.30am and 13.7p/KWh at peak times. 
also its 20% more efficient to have underfloor heating on the whole ground floor of the house, acting like one giant rad, rather than using normal radiators. a lot of new builds moving forward will be electric only using Air storage heat pumps.
overall- yes its a high cost to install about £10-£12k ,but with the £5k grant and the £1000 per year Up to 7 years- it pays for itself and its far more efficient and uses a lot less energy than gas/ LPG or Oil  and most importantly it is protecting the planet.  so its a win win.
in answer to Gerry1- having Air storage heat pumps, electric car charges and solar panels will massively increase the value of my property.
ill report back once we have it all installed and let you know the costs and how effective it is and how much i have saved.

What you are doing sounds great. I don’t think you will get double bubble in the RHI and green homes grant. You will get both but the RHI you receive will be less the amount you have claimed from the green homes grant. 

If your are worried about overloading your fuse You can get load management equipment to ramp down stoke of the non essential electrical loss in your home when your getting close to the limit. The easy ones are the ev charger. 

MWT

Chave0791 said:

i have a lot of government grants to lean on- £5000 for installing Air source heat pump.

I would suggest reading the comments in this thread before you assume you are going to be able to access the £5k grant...

https://forums.moneysavingexpert.com/discussion/6168743/new-green-homes-grant-to-give-up-to-5-000-in-vouchers-for-insulation-and-double-glazing

... and if you do go down that route get other quotes outside the scheme just for comparison, so you can see what you are really saving by using one of the very few installers that are willing and able to work within the limits of the scheme...

Chave0791

Ectophile said:

How many amps is the 1 phase supply?  A 100A supply should cope easily with a 7kW charger.  A 60A supply, probably not if you have electric heating as well.

its 100A so hopefully enough

Chave0791

thank for all the comments. some great points. its still early days on this one. I would prefer to move renewable regardless of the cost, just to help save the planet in some way, but trying to see what grants i can lean on. i have spoken to my architect who has ASHP recently on his house and he was able to get both grants and has looked into it for me and can see no reason as to why i cannot either. Gas is available at the property just not switched on, so worst case its the ASHP isn't going to work i will have a combi installed and use gas, but thats my absolute last resort to be honest as i want to be as CO2 neutral as possible . I am yet to speak with an installer of the ASHP, im awaiting the plans to come back from my Architect. 
Overall we are going to stick with the new 100A Phase 1 Fuse board that is in the house at the moment and move to the Octopus Go tariff, therefore charging my car @ 5P/KW in the 4 hour window ( which is plenty of Time)
i hope the ASHP is a success so i can educate others on my findings and encourage other people to have them as well.

Robin9

Chave0791 said:

Ectophile said:

How many amps is the 1 phase supply?  A 100A supply should cope easily with a 7kW charger.  A 60A supply, probably not if you have electric heating as well.

its 100A so hopefully enough

Although rated at 100a - it may be fused down to 60 or 80

brewerdave

Chave0791 said:

thank for all the comments. some great points. its still early days on this one. I would prefer to move renewable regardless of the cost, just to help save the planet in some way, but trying to see what grants i can lean on.
i hope the ASHP is a success so i can educate others on my findings and encourage other people to have them as well.

Great respect for what you are proposing to do , but this is definitely not the right forum for you as it is primarily about Money Saving !   

Mister_G

Robin9 said:

Chave0791 said:

Ectophile said:

How many amps is the 1 phase supply?  A 100A supply should cope easily with a 7kW charger.  A 60A supply, probably not if you have electric heating as well.

its 100A so hopefully enough

Although rated at 100a - it may be fused down to 60 or 80

Yes.  Although the carrier may have a 100 AMP label on it, there could well be only a 80AMP or even 60 AMP fuse in there.  It will depend on the DNO's local infrastructure.

Mintyrbc

Chave0791 said:

thank for all the comments. some great points. its still early days on this one. I would prefer to move renewable regardless of the cost, just to help save the planet in some way, but trying to see what grants i can lean on. i have spoken to my architect who has ASHP recently on his house and he was able to get both grants and has looked into it for me and can see no reason as to why i cannot either. Gas is available at the property just not switched on, so worst case its the ASHP isn't going to work i will have a combi installed and use gas, but thats my absolute last resort to be honest as i want to be as CO2 neutral as possible . I am yet to speak with an installer of the ASHP, im awaiting the plans to come back from my Architect. 
Overall we are going to stick with the new 100A Phase 1 Fuse board that is in the house at the moment and move to the Octopus Go tariff, therefore charging my car @ 5P/KW in the 4 hour window ( which is plenty of Time)
i hope the ASHP is a success so i can educate others on my findings and encourage other people to have them as well.

I have had an air source heat pump installed on my 1890's cottage under the Green Home Grants scheme so I can answer some questions having lived with it for a month through some cold weather.

Firstly re the Green Grant and RHI, you can use them both but the RHI pays off the Green Grant before paying you anything. I have a friend with an ASHP who gets around £250 per q back from the RHI so in this scenario he would get £1000 in both years 6 & 7. Good luck with getting an ASHP installed under the green home grant scheme now, the govt made it transparent yesterday that although the scheme has been extended to 2022 as of 31st March £1.5bn is being pulled out of the scheme leaving only several hundred million left for ongoing claims. With the initial take up and so many people already applying for vouchers you may have missed the boat....who knows, you may get lucky though.

I run a 12kw ASHP on a single phase 100 amp supply. The 12kw is the heating output and its more than capable of heating our house. Currently we are using over sized rads but we are in the process of installing underfloor heating throughout the ground floor of the property. Rads need to be fairly oversized to work. My plan is similar toy yours, ASHP, UF wet heating, good insulation then add solar PV and a storage battery at a later date.
System design is paramount, your ASHP needs to be able to provide enough output to be able to adequatly heat your property. My air source plant has been extremely well insulated to maximise efficiency. I make use of a buffer so the heat pump looks to maintain that tempreture rather than working on the flow and return of the entire central heating system. It subsequently doesn't run the whole time.  
The heating curve on our pump is set to the most efficient setting. With outdoor temp over 1 degree the heat pump gets our living room to around 20 degrees through an oversized rad. Below 0 and the efficiency drops off, and the temp drops and the pump works harder costing more. On a normal day ( 2 degrees +) the heat pump is exactly like for like cost wise. I have kept my gas boiler plumbed in and have switched between the two to test daily cost at this time of year.  

Example of oversizing rads: