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robl
@robl
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Joined: Mar 23, 2022
Last seen: Mar 1, 2026
Profile Activity
Topics: 1 / Replies: 213
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RE: Heat Pump Fuse Type

Like any electrical component, an SPD may fail. They're generally Metal Oxide Varisters (MOV), and over repeated high voltage spikes tend to slowly d...

1 week ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Electricity price predictions

Power limits are very common in France, typically 9kVA for a household, although anything from 3-36(3phase) is perhaps available. The higher the kVA ...

2 weeks ago
Forum
Electricity, Tariffs, Monitoring & Providers
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RE: Safety update; RCBOs supplying inverters or storage batteries

@transparent I do like the safety first precautionary approach. We could do with it in other aspects of life (PFC's, CO2 emissions...). I trust a ba...

3 weeks ago
Forum
Solar Photovoltaic (PV)
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RE: Safety update; RCBOs supplying inverters or storage batteries

@batpred Below is a simplified problematic RCD circuit I ‘found’. The trigger is the difference between L and N currents, which is then amplified u...

3 weeks ago
Forum
Solar Photovoltaic (PV)
Reply
RE: Safety update; RCBOs supplying inverters or storage batteries

Thanks for the clear explanation @transparent. I think I agree with two sides of this issue: There is a risk that when a unidirectional rcbo/rcd tr...

3 weeks ago
Forum
Solar Photovoltaic (PV)
Reply
RE: Plug and play solar. Thoughts?

The risk with an rcbo is that the cheap normal ones use a tiny transformer to create a signal if there is a difference in current between L and N cabl...

3 weeks ago
Forum
Solar Photovoltaic (PV)
Reply
RE: Air Changes per Hour - ACH and the MCS requirement

A blower door test typically pressurises the home to +/-50Pa relative to outside, and measures the airflow required to achieve this in m^3/hour. Usin...

1 month ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Electricity price predictions

The underground gas pipes near us are all being replaced, with our street around the time we removed it from our house altogether! I think the gas...

3 months ago
Forum
Electricity, Tariffs, Monitoring & Providers
Reply
RE: Electricity price predictions

I think home batteries are now very inexpensive, £1000 will get you 16kWh from Aliexpress - I expect +shipping, £1400 all in price from fogstar in the...

3 months ago
Forum
Electricity, Tariffs, Monitoring & Providers
Reply
RE: Cost to have Gas removed

Octopus removed our gas meter for free a couple of years ago - leaving a capped plastic pipe sticking out of the ground inside the old meter box. I k...

5 months ago
Forum
Your Home
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RE: Double or Triple Glazed Windows?

If you get windows replaced, then I think it's well worth getting low U value units in whatever the frames are. It's not simply 3G is better than 2G;...

7 months ago
Forum
Insulation
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RE: Can I add an EV charger to a full consumer unit by coupling with a garage DB?

As I understand it, if a slowly rising common mode DC is passed through the AC only type of RCDs then it will saturate the core in it, and then it can...

12 months ago
Forum
Renewable-powered transport (EVs & e-bikes)
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