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It seems no pumps. I can see how therm-syphon will move the water, what I can't see is how there as any control as to how much water is heated.

That was also my problem, There is still one small problem, the TRV in my wife's bedroom is out of direct range of the Hub, so I have a smart socket adaptor which relays the signal, so with a power cut, wife's bedroom can't call for heat. I also lose internet, so can no longer turn heating...

I assume it starts a flow, and the gate valve regulates the flow, but can't find the Willis website. I liked the idea, but I am not sure how it will work with varying output from the immersion heater? My immersion heater controller can run between 200 watts and 3000 watts, with pulsed DC, and I...

Most boilers, heat pumps, etc, do not like fast cycling, so most thermostats have something to stop it. Be it a little resistor which heats up the thermostat when turned on, or some electronic part, there is normally something which results in a delay, while not affecting the temperature. Also...

In this post I have shown pictures of my set-up, and talked about some of the options and costs. It shows a picture of before and after, this picture also shows the controller used, and how much I used in 7 days the advantage of the controller I am using is it shows how much I have used, I...

The 6 kW solar panels rarely can produce 6 kW, so the 5 kW inverter means on the odd time it can produce 6 kW all over 5 kW is lost. In the main we use less than a kW, so the extra 4 kW will now go to charge the batteries, but before the second battery only 2 kW went to charge batteries as...

@flameport is spot on as usual. The old economy 7 timers seem to have gone, and only the more modern ones remain, it was common to have two immersion heaters, one near the top of the cylinder as a boost, and one further down to heat whole tank, the other method was an external thermostat using...

In reverse order. To be frank, I am not sure what a modern boiler can do, they did base their output on the return water temperature, but they have so much more now with weather compensation etc, so I can't really answer that. Yes, I have seen and heard so much where clearly the designer...

I played with solar panels in the 80s on the Falklands, which should with wind their been great, but it was rather disappointing. He got one propriety wind charger, and it was rated at 15 amp, but lucky if you got 3 amps. I would ask about this on a narrow boat forum as they use them a lot...

I started with 3.2 kWh, and then doubled up and now have 6.4 kWh, I use around 12 kWh so in summer with 6 kW of panels I am normally OK, what I found was a problem is the battery would only charge at 2 kW so with a 5 kW inverter I was seeing export even when battery not fully charged, and it...

The Welshpool & Llanfair light railway have the initials W&LLR but Ll is one letter, so it should be W&LlLR but it seems the initials are registered with companies house or something, and it will cost a fortune to correct the error. As to where the Jones came from, when no J in Welsh alphabet...

I got eQ-3 electronic heads for £15 each, mine were bluetooth, and back in 2019, but still found some deals for electronic heads for £15. The big difference is with electronic heads, one can also set the time. Second advantage actually set in degrees C not some silly *123456. But the electronic...

12p is still more than the 8.5p I pay for off-peak import, so will not change the fact that allowing the battery to fully recharge with off-peak tariff, does not matter, as will be getting more export once the sun comes out. But this may tip the balance for some tariffs. My inverter, as far as...

Easy to isolate and lock off a 13A plug, the lock off device is reasonably universal for all 13 amp plugs. You can get them for a FCU, ⁣ but as @OwainDIYer says, needs to be all poles, so the FCU has to be switched, as removing fuse only isolates the line, and the lock off device has to be for...

Instantaneous means in the main it will need a dedicated supply, but a small reservoir means the supply can be a lot smaller, so this unit is only 1.5 kW so can be plugged into any socket, and do the same thing, I had one in a caravan I was living in, with a 1 kW element, and the cupboard it was...

End of day, 40 amp is over the rating for most 4 mm² cable, and it is likely over 3 meters in length, so a FCU with 13 amp fuse will likely not technically comply. That is likely spot on. It does not take a lot of work to swap a 40 amp for a 25 amp. My only problem with swapping a MCB for a...

I had a non condensing in my house 1979 approx, but my sister around 1990 had a condensing boiler, and her house was the first I saw with one direction TRV heads, later versions were bidirectional. The first I saw was Honeywell EvoHome, originated from the "Hometronic" system launched by...

So likely a flash over as contacts open, still an EMC fault. There should be no connection between a smoke alarm and the heating, but cables can run in proximity to each other. The SPD should stop any spikes, but older consumer units don't have them fitted. Cheap options first or use an...

My Nest Gen 3 is hard-wired, but it still uses radio signals. Be it radio, or simply two cables too close together, it looks like an EMC problem.