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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.

5 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...

9 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...

9 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 ...

9 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...

9 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...

9 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:...

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
Topic
COP is not the only measure of efficiency
9 months ago
Forum
Air Source Heat Pumps (ASHPs)
Replies: 11
Views: 1870
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...

9 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...

9 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>  

9 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...

9 months ago
Forum
Domestic Hot Water & Cylinders
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