Yes unfortunately I think you're right. Your smart meter will know when it's charging your car and eventually that electricity will be taxed in the way fuel is taxed to cover the losses on fuel duty.It matters not what the energy we use costs to generate the people with the power will always be able to provide an explanation to justify why it costs us so much, there is always a reason why prices to the consumer must rise, demand V supply, costs of infrastructure and maintenance, environmental reasons, the truth is people economising causes prices to rise.
People are reducing their demand on energy, equipment is designed to consume less energy, more efficient systems, LEDs instead of incandescent etc - so if each household reduces their consumption then the energy companies earn less - and they are not going to wear that, every company wants to increase profits year on year so the cost per KWhr is increased to offset the consumers reduced consumption. (plus a bit extra)
I suspect Electricity is substantially rising because the fat cats at the top of the energy companies can see the growth in the electric vehicle market, they know most vehicles will be charged at home overnight and that's too good an opportunity to miss out on, cheap overnight deals will end and I also suspect the government will raise the price of the VAT on energy as they loose the tax on petrol/Diesel as sales diminish.
The smokescreen - which is the government encouraging the nation to conserve energy, to be green, waste less, recycle everything is just that - a smokescreen - they say they will be carbon zero by 2050 - you know they wont, Actions speak louder than words - so if you want to encourage clean energy then you don't cut or reduce those subsidies that were introduced to drive the clean energy drive.
Removal of the FIT tariffs for Solar.
Abolish the generation payments for those generating excess energy at home and feeding back to the grid
Home battery storage - increase the VAT on batteries from 5% to 20%
Remove the congestion charge exemption for full electric vehicles
Reduction in BIK for all electric vehicles
Remove/ reduce the grants that encouraged people to insulate homes better
Reduce/remove the grant towards home charge points
Smart Meters - These are designed to make the energy companies a lot more money - they are able to do away with the meter readers so a substantial saving - however, they have always justified these readers by saying they also carry out visual safety checks on the meters - and not one of them have a gas safe or Electricity qualification that qualifies them to carry out such checks.
Once the majority are on smart meters then variable charging is to be introduced - so peak demand will attract peak prices - eat your Dinner at the normal time and you will pay dearly for the privilege.
Generating your own electricity has to be the way forward.