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jamespetts
@jamespetts
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Eminent Member
Joined: Nov 4, 2024
Last seen: Jan 3, 2026
Profile Activity
Topics: 3 / Replies: 28
AllTopicsReplies
Reply
RE: Solar Power Output – Let’s Compare Generation Figures

2025 energy total: 7.4mW produced, 5.4mWh exported, 3.0mWh imported.

7 months ago
Forum
Solar Photovoltaic (PV)
Reply
RE: COP is not the only measure of efficiency

For unoccupied rooms when I am home, I do use setback temperatures on the TRVs. When I am not at home at all, however, I turn the heating off entirely...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Who’s Caved and Switched the Heating On Already?

  Yes, there is definitely scope for heat pump controllers to become much more efficient with better automation. The best solution until that h...

11 months ago
Forum
Your Home
Reply
RE: COP is not the only measure of efficiency

I am a little sceptical of this, not least because, in an old house like mine, the insulation between the rooms and other rooms is not much different ...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Who’s Caved and Switched the Heating On Already?

I have automated this decision. I have a heat pump with weather compensation, but had noticed that it was coming on in the early mornings when the tem...

11 months ago
Forum
Your Home
Reply
RE: COP is not the only measure of efficiency

Can I clarify - is the LSV the manual balancing valve? That would not be much use to me, as there are not rooms that I always want to be colder: rathe...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: COP is not the only measure of efficiency

@toodles Your use case is indeed very different to mine, and much closer to the COP optimum, I expect. I agree that comfort is relevant to efficiency:...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Topic
COP is not the only measure of efficiency
11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Replies: 11
Views: 1964
Reply
RE: Solar Thermal DHW and ASHP

I was originally contemplating a solar thermal installation last year. However, I decided in the end to install solar PV instead together with my heat...

11 months ago
Forum
Solar Thermal & Power Diverters
Reply
RE: Anyone still weathering it out with Agile?

I have been using Agile since last October. Like another poster here, I use Home Assistant to make the most of it, automatically heating my water at t...

11 months ago
Forum
Electricity, Tariffs, Monitoring, Electrics & Providers
Reply
RE: Solar Power Output – Let’s Compare Generation Figures

My system installed in July 2024 has produced 6.4mWh in 2025 so far and produced 2.2mWh in 2024. Details on my Enphase public page here:/p>  

11 months ago
Forum
Solar Photovoltaic (PV)
Reply
RE: 300 Liter Tank - Do I have to heat it all?

I do not think that a 300l cylinder is too big for a two person household. I live in a 1 person household and have a 250l cylinder, which is just abou...

11 months ago
Forum
Domestic Hot Water & Cylinders
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