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Old_Scientist
@old_scientist
Member
Prominent Member
Joined: Jun 16, 2024
Last seen: Dec 19, 2025
Profile Activity
Topics: 6 / Replies: 309
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Reply
RE: Octopus Energy new Cosy tariff.

@mike-h Yes, I was aware it's not ideal, as discussed in this article: The installers insist on a volumiser (a) to ensure the minimum volume is a...

1 year ago
Forum
Electricity, Tariffs, Monitoring & Providers
Reply
RE: Octopus Energy new Cosy tariff.

Yes, it really is a volumiser (2 pipe tank), and it is located on the primary 28mm return to the ASHP as shown here: so is on the return for both ...

1 year ago
Forum
Electricity, Tariffs, Monitoring & Providers
Reply
RE: Octopus Energy new Cosy tariff.

Agreed, even a 5kW battery would allow one to charge at 11p and avoid importing at 34p during the peak period, plus it gives added comfort and conveni...

1 year ago
Forum
Electricity, Tariffs, Monitoring & Providers
Reply
RE: Maximising Savings: Navigating My First Year with Octopus Energy and Heat Pump Running Costs

I am so relieved to find this thread and discover that I am not the only person obsessed with this - Like Steve, I have no issue with looking at the d...

1 year ago
Forum
Electricity, Tariffs, Monitoring & Providers
Reply
RE: Octopus Energy new Cosy tariff.

Yes, we have a 50L volumiser installed, and our radiators can emit the minimum heat output at flow temps of 33-34C, so this is as low as we can go.

1 year ago
Forum
Electricity, Tariffs, Monitoring & Providers
Reply
RE: Octopus Energy new Cosy tariff.

Interesting @mike-h. When I first looked at Cosy, it didn't appeal and we went with Agile. I'm not sure if they have changed the time slots and the di...

1 year ago
Forum
Electricity, Tariffs, Monitoring & Providers
Reply
RE: Octopus Energy new Cosy tariff.

@steve81uk We are all radiators, no UFH so do not benefit of the thermal mass associated with the latter. Further, our new internal wall insulation (I...

1 year ago
Forum
Electricity, Tariffs, Monitoring & Providers
Reply
RE: Octopus Energy new Cosy tariff.

I have an oversized Samsung 12kW heat pump, 3.64kW solar, but no batteries, and this new Cosy tariff has caught my interest. For anyone with batteries...

1 year ago
Forum
Electricity, Tariffs, Monitoring & Providers
Reply
RE: Samsung gen 6 - how to manually turn on/off immersion (booster)

@ecobaker absolutely correct - I'd only manually kick in the immersion when prices turn negative, so (a) I can store energy by heating DHW as high as ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Samsung gen 6 - how to manually turn on/off immersion (booster)

@ecobaker Thanks. Hopefully we may have some cheap pricing slots on Agile this weekend, so I will be able to have a play and observe how these setting...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Air source heat pump roll call

@transparent thanks for the info and links - I will certainly have a read through. I am definitely not adverse to the idea of DIY battery storage. T...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Air source heat pump roll call

@transparent - ASHP install was completed last week. As with many others, I am now a member of the over-sized ASHP group. I had estimated we needed ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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