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Old_Scientist
@old_scientist
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Joined: Jun 16, 2024
Last seen: Mar 5, 2026
Profile Activity
Topics: 6 / Replies: 353
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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,...

6 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 ...

6 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...

6 months ago
Forum
Energy Storage
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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...

6 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 ...

6 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...

6 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...

6 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...

6 months ago
Forum
Energy Storage
Reply
RE: Rodents! A word of warning

Almost immediately after install, I had signed of rodent activity - chewed insulation on pipe runs in the loft. They seem to like foam pipe insulation...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Powerwall 3 or Myenergi or something else?

We have a Tesla Powerwall 3, recently installed, so I maybe biased. With a Gateway, it will provide full home backup. A separate earth rod must be i...

7 months ago
Forum
Energy Storage
Reply
RE: Heat Pump Servicing & Maintenance – Good Value or Rip-Off?

Having bit the bullet and paid £250 for a service, our service engineer came today so I thought I'd report on the experience. We'd paid for the ASHP...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat Pump Servicing & Maintenance – Good Value or Rip-Off?

@heat-pump-newbie as I suspected. I measure/monitor my COP daily, so I think I'd notice pretty quickly unless it was a very slow prolonged leak where ...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
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