Re: energy in UK

On 4/18/25 7:39 PM, Don Y wrote:

On 4/18/2025 6:43 PM, KevinJ93 wrote:

On 4/18/25 2:33 PM, Don Y wrote:

On 4/18/2025 5:38 AM, Carlos E.R. wrote:

<...>

I wonder how they are going to power those smart meters. Batteries? The water runs a generator that charges a battery?

>
No idea.  But, even replacing batteries (every year or so?) would
be cheaper than coming around and reading EVERY meter EVERY month.

>
The smart gas meters around here are powered by batteries with a 10 year life. They only have a short range wireless link to the smart electric meter in the same house that can then have a much longer range link to the utility transceiver on a nearby utility pole.

 How short is short?  OUR gas and electric are adjacent.  But, many homes
have the gas meter in an alley while the electric is on the load center.

I don't know - I imaging a couple of tens of meters. They use ~450MH for the gas meter link and ~920MHz for the electric meter.
Where the network coverage or location of the meters precludes the usual arrangement PG&E have various RF bridges that can be used.

So, the gas company has an agreement with the electric utility?  When I
was doing this stuff, comms was the big challenge (measuring power
and tracking it -- internally -- is easy.  But, getting a tariff with
"someone" to haul the data back to the utility was a political/business
issue not easily addressed with technology.

For our local utility and many others in California the same company distributes both gas and electricity.

[PLC won't work as there are too many inductors between the customer
and the utility.  And, pole-top relays don't save much as there may
only be 2-4 subscribers on a single transformer.]
 

Since it has plenty of power, the electric meter provides updates every few minutes to allow time of use metering. The gas meter only provides once per day updates, presumably to conserve power.