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UK smart meters contain a SIM card that connect to the local mobile phone network. In areas of poor reception the device increases antenna power and output to try and get a better signal. This is in the form of non-ionising radiation and has an adverse effect on electronics and biologicals. The aluminium foil blocks the signal, note I spelt ALUMINIUM correctly...Ines I’m no expert but how could the meter possibly trip that RCD since it’s feeding the premises and ahead of all your overcurrent and short circuit protection. It also seems unlikely that the wireless reading could trip a breaker. I wished I had an answer
The increased power of the phone signal caused the RCD electronics to detect a fault and operate the device.
@Ines Spires I would again hassle them and request an external antenna is fitted to the SM, they are readily available and easy to install, this should stop the nuisance tripping.
And I'm now in smug mode.