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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: 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...

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
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 months ago
Forum
Electricity, Tariffs, Monitoring, Electrics & Providers
Reply
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...

2 months ago
Forum
Solar Photovoltaic (PV)
Reply
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...

2 months 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...

2 months 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...

2 months 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...

3 months 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...

4 months ago
Forum
Electricity, Tariffs, Monitoring, Electrics & 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...

5 months ago
Forum
Electricity, Tariffs, Monitoring, Electrics & 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...

7 months ago
Forum
Your Home
Reply
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;...

9 months ago
Forum
Insulation
Reply
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...

1 year ago
Forum
Renewable-powered transport (EVs & e-bikes)
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