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Old_Scientist
@old_scientist
Member
Prominent Member
Joined: Jun 16, 2024
Last seen: Dec 17, 2025
Profile Activity
Topics: 6 / Replies: 309
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RE: A Customer's Lessons Learnt from a Heat Pump Installation in a Large House

We got lucky and hit gold with our installer. Rather than size radiators to a design temp, we came at it from the opposite direction of lets measure t...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: The Battery Battle

I agree. I think a lot of it comes down to people's resistance to change, and an expectation of an experience similar to what they had before with an ...

4 months ago
Forum
Energy Storage
Reply
RE: Who's your electricity provider and what's your tariff?

Where did you see that? My understanding is simply that Octopus Outgoing is no longer a fixed tariff, but is now more like a standard variable rate ...

4 months ago
Forum
Electricity, Tariffs, Monitoring & Providers
Reply
RE: Sanity check please. Battery storage and inverter sizing.

There are MCS guidelines about how close to the edge/ridge of a roof panels can go, and if they are MCS accredited then they will have to stick to tho...

4 months ago
Forum
Energy Storage
Reply
RE: Balancing financial efficiency and comfort using the Octopus Cosy tariff

I estimated our usage on the following basis. The most challenging 6h window for us is 4-10pm as it coincides with cooking/meal time (electric oven,...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Balancing financial efficiency and comfort using the Octopus Cosy tariff

Agreed that Cosy works best for battery owners, and the savings do not always stack up well versus the battery costs over the 10 year warranty period ...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Sanity check please. Battery storage and inverter sizing.

OK, so if it were a Tesla Powerwall I'd be presenting arguments to the DNO for the full 11.04kWh inverter rating for the battery, keeping the solar on...

4 months ago
Forum
Energy Storage
Reply
RE: Balancing financial efficiency and comfort using the Octopus Cosy tariff

We ran on Cosy last winter and we switched off during the peak (4-7pm) and set back over night as the house gets too hot if running constantly, even o...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Sanity check please. Battery storage and inverter sizing.

Please can you clarify what you'd ideally like to achieve. Are you simply seeking to add a battery to your existing setup, or are you also seeking to ...

4 months ago
Forum
Energy Storage
Reply
RE: Sanity check please. Battery storage and inverter sizing.

Correct, the G99 imposes separate limits for the size of the generating equipment (inverter size) and an export limitation. For example, you can apply...

4 months ago
Forum
Energy Storage
Reply
RE: Why so many sigenergi installer recommendations?

I've noticed lots of love for them on YouTube too - I wonder if it's slightly opportunistic due to the backlash against Elon / Tesla. I think a lot of...

4 months ago
Forum
Energy Storage
Reply
RE: Sanity check please. Battery storage and inverter sizing.

So you already have a 3.68kW inverter / solar install? Only a DNO application will tell you if you've missed the boat and what you are allowed., but...

4 months ago
Forum
Energy Storage
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