6 months and I gave up!
I can't see how they have earned one star. I'm writing this sitting in an unheated house with 2 primary school children and a thermometer reading 10 degrees! I contacted Octopus for a quote on 25 July. I paid a deposit on 20 August for a formal quote and the soonest they could do was the 5th September. The technician who did the heat loss calculation told us they would suggest a Cosy6, but to push for a Cosy9 as we were on the cusp. After a back and forth and delay due to the lead design engineer being away I was told it would have to be a Cosy6 on 29 September with an install in Mid November. I noticed that they had missed one room off the heat loss calculation and decided that the kitchen would just be unheated. I raised this on 30 September and they re-did the heat loss on, confirming that I needed the Cosy 9. A new contract was sent on 21 October, which I signed. I then was moved from the salesman to a 'tech specialist' for the install. The contract required me to clear the space for the heatpump before installation so I paid £600 to remove my existing oil tank and 900 litres of oil and then had the area landscaped ready for the heatpump. I then received an email on 3 November from my DNO stating they were quoting for me. I raised this to Ollie at Octopus that no-one had raised any payment to the DNO and he informed me that I may need three-phase at a cost of £1,500-15,000 on top of the heatpump! I asked him to make it clear that I would rather remove the electric shower than pay for three phase. Ollie didn't respond and nothing happened, so on 11th October I phoned Ollie and there was no answer. I phoned Octopus Energy Services and they promised to leave a message for him to call back. On the 13th I called the DNO and they explained that Octopus has requested three phase due to the current load and they had sent the quote a week earlier to Ollie anyway. They suggested I go back to Octopus regarding the electric shower and ask them to remove it from the estimate. I phoned and tried a number of options on Octopus's telephone line and four times I was told I was speaking to the wrong person - the most obvious option of a new heatpump install was disconnected as soon as you chose the option. Eventually I ranted to a kind person in technical support for already installed heatpumps and they raised the issue internally, raised a complaint for me and got my new tech specialist to call me (Ollie had moved department within Octopus and didn't bother passing anything on obviously). Kay came back on 14th and asked me to complete a new load requirement survey. I did on the same day and Kay came back on 18th November stating 'it appears the initial figure was simply due to a combination of human error and some incorrect data being pulled through on our side. I sincerely apologise for this oversight' and promising a response on 19th November. Today (the 20th) I emailed and asked for an update. I've made it clear throughout that I have two young children and no heating at all. I am now looking at getting a new oil tank and my existing boiler fixed. I have about 60 emails with Octopus. Please try someone else as they neither care nor do anything.
UPDATE: I have cancelled my order (10/1/26). I was due an install on the 16th December, but that didn't go ahead. Octopus sent an 'expert' around on 18 December to confirm the work and I was told it would be simple and quick. Following a grim Christmas in a cold house I've emailed to ask what is happening and had no response at all. I just cancelled and got an out of office from 'my Tech Specialist'. My young children, wife and I have endured a freezing winter, two oil radiators have kept the house at 8-12 degrees at a cost of about £15 a day! Rather than start afresh with a competent company, I'm reverting to heating oil (my village doesn't have gas).
UPDATE 21/1/2026: Having cancelled, I've had no response in a week, other than a auto-reply stating that there would be delays due to the volume of new orders! Great.
UPDATE 12/02/2026: Whilst Octopus has accepted their failures, I have been left about £4,500 out of pocket. Octopus are offering a final offer of £300 which they believe is a fair payment. So I will take it up with HIES, the ombusdman.
20 November 2025
Unprompted review