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robl
@robl
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Reputable Member
Joined: Mar 23, 2022
Last seen: Mar 1, 2026
Profile Activity
Topics: 1 / Replies: 213
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Reply
RE: Can I add an EV charger to a full consumer unit by coupling with a garage DB?

We have two car chargers with different plugs🙄 - a 32A one and a 10A one. The larger one is fed with 6mm2 cable from its own tiny CU (looks j...

1 year ago
Forum
Renewable-powered transport (EVs & e-bikes)
Reply
RE: Plug and play solar. Thoughts?

I’ve seen our mains voltage very high on occasion, but I’ve never known anything happen due to it. We get 253V on a sunny day here - I looked in the ...

1 year ago
Forum
Solar Photovoltaic (PV)
Reply
RE: R32, "optimum" delta T

There’s no definitive magic deltaT for a heatpump, just pragmatic ‘generally optimum’. If you put more power into the water pump, the deltaT will redu...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat pump's integral circulator pump

That 2.5% cost increase every degC corresponds to my home-made graph pretty accurately. I was confused by the graph above at first, but then I unders...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat pump's integral circulator pump

Technically I could perhaps be called a heat pump designer, having designed and built the one gshp system that has heated our home for 3 years. It’s ...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Solar inverters - where does the energy go when clipping?

Why do panels get damaged if not connected? When they are normally in the sun, they get 800W/m^2 evenly distributed, and they warm up everywhere. S...

1 year ago
Forum
Solar Photovoltaic (PV)
Reply
RE: Solar inverters - where does the energy go when clipping?

In the solar panels. On a nice sunny day, a square metre of panels would get 1kW from the sun. Of this we might expect 200W of electical power if...

1 year ago
Forum
Solar Photovoltaic (PV)
Reply
RE: Cost to have Gas removed

We had our gas meter removed too by Octopus, for free. It took the guy 20 minutes to do - he turned off the incoming gas lever in our cabinet, remove...

1 year ago
Forum
Your Home
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RE: Is it crucial to get flow temperatures with heat pumps right?

I notice on a pic on page 2 what looks like heatpump gubbins (buffer, tank, pump, pipes) in a cold ventilated loft? How much insulation is there in ...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Hybrid ASHP and gas boiler - operating together

As the boiler is just on/off at a given running temp, can you drop the temp down to the lowest acceptable, leaving it on most of the day (18hours+)? ...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Hybrid ASHP and gas boiler - operating together

Do your gas boiler have weather compensation? If so, enabling it will improve efficiency. I assume the boiler is huge, and can operate at high power...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Do thick walls make for warm houses?

@bontwoody A lot of the reason the u value doesn’t scale with 1/wall thickness is because in-situ insulation also includes air boundary layers. Tha...

1 year ago
Forum
Insulation
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