How I Negotiated a Better Deal on My Heat Pump Installation with Octopus Energy
Morning all,
I've been around for the last few weeks trying to get my head around all the different terminology involved with heat pumps.
I got a quote from Octopus after survey of £4100 to pay on our 4 bed 120sq/m house.(This compares to Heat Geeks £6400)
3 radiator replacement, a Daikin 8kw heat pump 210ltr cylinder, removal of gas boiler and meter in garage.
Cylinder going where boiler was in garage and heat pump directly behind garage wall as all pipework from gas boiler already there.
Surveyor said it would need an easy job to install.
I contacted Octopus to say it seems a bit expensive compared to other comparable Octopus 4 bed quotes I've seen posted elsewhere.
After a few emails they reduced the price by £700, a few days later said there was an offer on so I could get another £500 off, also said to get an install code of the internet for another£ 100 off.
I've also managed to get another 2 radiators upgraded in the price.
So there is opportunity for discount if you push it.
One thing reading on here though I tried to get removed was the buffer/volumiser, but no chance. They say it's part of the system and needs to be installed.
I'm just waiting now for confirmation of an install date should I commit.
I don't want the middle of winter so hopefully no later than October.
At this rate, by the time you get an install date, Octopus will be paying you for the opportunity to install it in your property!😉 Toodles.
Toodles, heats his home with cold draughts and cooks food with magnets.
Although you are making a joke, it made me think about what would happen if Octopus could get the total price of the install below £7,500. The £7,500 BUS grant belongs to the householder, so the surplus BUS would presumably go to the householder.Posted by: @toodlesAt this rate, by the time you get an install date, Octopus will be paying you for the opportunity to install it in your property!😉 Toodles.
I don’t think that’s quite correct. So far as I know, the grant money doesn’t “belong” to the householder; it’s merely paid to them for them to put to a predefined and narrow set of uses. Anything not used would therefore, I think, have to be returned. Whether the BUS scheme has a mechanism for doing that is a separate question.
105 m2 bungalow in South East England
Mitsubishi Ecodan 8.5 kW air source heat pump
18 x 360W solar panels
1 x 6 kW GroWatt battery and SPH5000 inverter
1 x Myenergi Zappi
1 x VW ID3
Raised beds for home-grown veg and chickens for eggs
"Semper in excretia; sumus solum profundum variat"
@majordennisbloodnok I think you're correct. My understanding is that if the grant is not fully utilised (i.e., the installation costs are lower than the maximum grant amount), the unused portion of the grant does not get distributed to the homeowner or installer. It simply remains unclaimed. The BUS is designed to subsidise costs up to a specified limit, but it does not disburse funds beyond the actual installation costs.
Get a copy of The Ultimate Guide to Heat Pumps
Subscribe and follow our YouTube channel!
Posted by: @njtOne thing reading on here though I tried to get removed was the buffer/volumiser, but no chance. They say it's part of the system and needs to be installed.
Welcome to the forums @njt – in quick response, a volumiser is fine, it's the buffer that's the potential issue. That said, a well-installed and balanced buffer can be efficient, but the problem is that installers don't do this properly and this leads to issues and higher running costs.
I'll be very interested to hear your updates and see how things progress from installation to getting the unit running.
Having re-read your message, as you're below the BUS grant amount, why don't you consider going ahead with the Heat Geek and getting the installation guarantee?
Get a copy of The Ultimate Guide to Heat Pumps
Subscribe and follow our YouTube channel!
Hi Mars, I could have made it clearer but the prices I initially gave were after the BUS amount, so Octopus £11600, Heat Geeks £13900. Oh and heat geeks quote was just off their website.
Update from Octopus, they say the buffet/volumiser is 1 unit, there's different ways to connect it up as to which ones it operates as.
I requested the volumiser, the advisor said he'd never had that request put to him before and he'd have to get back to me.
I wasn't thinking it through. Of course the government isn't going to subsidise more than the cost of the ASHP.Posted by: @majordennisbloodnokI don’t think that’s quite correct. So far as I know, the grant money doesn’t “belong” to the householder; it’s merely paid to them for them to put to a predefined and narrow set of uses. Anything not used would therefore, I think, have to be returned. Whether the BUS scheme has a mechanism for doing that is a separate question.
@njt that occurred to me after I’d posted that your figures would have been after the BUS grant, but wasn’t near a computer.
Get a copy of The Ultimate Guide to Heat Pumps
Subscribe and follow our YouTube channel!
- 27 Forums
- 2,435 Topics
- 55.4 K Posts
- 415 Online
- 6,120 Members
Join Us!
Worth Watching
Latest Posts
-
RE: Recommended home battery inverters + regulatory matters - help requested
Thank you for the responses. In answer to yo...
By JamesPa , 38 seconds ago
-
RE: My Powerwall 3 Consumes 3-4 kWh/Day in Self-Consumption: Is This Normal?
@caron You should expect well over 90% efficiency. I...
By Batpred , 10 minutes ago
-
RE: Solis inverters S6-EH1P: pros and cons and battery options
@vanq Sure, I will try to answer: 1. I am very ha...
By Batpred , 15 minutes ago
-
RE: DHW heat loss through pumps.
Ha ha yes - fair point. I was referring not to the gap ...
By Marzipan71 , 24 minutes ago
-
RE: Aira Heat Pump: Stylish Scandinavian Heating
@trungdong Finally, I remembered to call Aira about ser...
By ChandyKris , 38 minutes ago
-
RE: What a Bad Heat Pump Installation Looks Like
It's unbelievable how many emails and DMs I've received...
By Mars , 1 hour ago
-
RE: Our ASHP design and installation journey
This is always a tricky one. Someone has to pay for the...
By cathodeRay , 1 hour ago
-
RE: Midea ASHP Issues with Smart Home App losing connectivity with the Wall Unit
@cathoderay - slightly off topic. Driving home from t...
By SteveT , 1 hour ago
-
RE: Global Energy Systems Thurso ASHP
I’d choose Vaillant of the two too. We heard too many s...
By Judith , 4 hours ago
-
RE: Renewables & Heat Pumps in the News
Just to compare, this was our summary for 2025: - ...
By SKD , 4 hours ago
-
RE: Minimum and Zero Disrupt Heat Pump Installations
In our case we deliberately chose to change the cylinde...
By Judith , 6 hours ago
-
I hadn’t realised they were loose coils until I saw you...
By Judith , 6 hours ago
-
RE: Reliable, easy to use home battery options
That Growatt, @batpred, is the one we have, so all my c...
By Majordennisbloodnok , 7 hours ago
-
RE: A Smarter Smart Controller from Homely?
@johnnyb I don’t know any better to concur or disagr...
By Papahuhu , 17 hours ago
-
RE: Is it normal to use power from the grid when running off the battery?
The reason I said the voltages vary slightly is because...
By JohnnyB , 17 hours ago
-
RE: Setback savings - fact or fiction?
Hi @sunandair Thanks, if you or anyone would like to...
By RobS , 18 hours ago
-
RE: Heat Pump Servicing & Maintenance – Good Value or Rip-Off?
I agree with you at every point, you are welco...
By ASHP-BOBBA , 18 hours ago
-
RE: Who has a V2G EV installation
@broadsman, yes-ish and no. We bought our ID3 secondh...
By Majordennisbloodnok , 1 day ago
-
RE: Help needed with Grant Aerona 3 issues
@editor We come across about 4 leaks per year on sealed...
By dgclimatecontrol , 1 day ago



