@Rene sums were done using my gas and electric usage (i.e. not based on any pre or post price rises). I’m not on a fixed deal with Octopus, it’s “Flexible Avro October 2021 v1” which, afaik it’s just the same as, or extremely close to, their standard “price cap” tariff.
Copied direct from Octopus (whilst I was logged in) showed what Octopus Go tariff is available to me –
Unit rate (04:30 – 00:30):
33.96p/ kWh
Unit rate (00:30 – 04:30):
7.50p/ kWh
Standing Charge:
48.26p/ day
Prices include VAT.
Octopus Go is an electricity only smart tariff. For gas, simply choose any Octopus gas tariff.
Unfortunately there was no gas only tariffs showing on Octopus’ website, so I chose the cheapest gas only tariff from a comparison website. Perhaps Octopus would allow my to stay on my current flexible gas tariff, but it does state “choose any Octopus gas tariff”. At best, I’d be able to keep my current tariff which will increase around 40% in a few months.
You’re correct in my sums not including my household usage being on the discounted rate of 7.5p instead of 33.96p, but I don’t agree that during those hours I’d use 15% of my daily power, it would be a good bit less. I’m using 0.749 kWh from 00:30 – 04:30 (4hours). Considering my annual consumption is 3947kWh, my daily avg is 10.81 kWh. Therefore I’m using just under 7% of my daily usage during 00:30 and 04:30.
Therefore my original sums were over by 26.46p per kWh during 00:30-04:30. As I use 0.749 kWh during this period, my original sums were over by 19.82p/day. I originally stated “I’m £222.37 worse off before any charge point installation costs and the cost of actually charging the EV.” But with updating the sums to reflect the 4hr reduced rate, I’d be £150.03 worse off.
I understand that delayed starts for washing machine, etc can move some usage to these discounted hours, but in reality this doesn’t always work (as we found out on our previous economy7 tariff). E.g. I wear heavy cotton clothes (I’m not very keen on my body shape and find light weight materials cling to me, especially when there’s a breeze). This type of material goes stinky if left in a damp warm washing machine. My wife will wash her uniform when she gets home from work. She can’t wash it in the early hours of the morning to wake up to wet clothes. Unless we buy a tumble dryer and set the alarm clock for around 3am to remove freshly washed clothes and place in tumble dryer, then head back to bed (obviously this isn’t a realistic option).
As I mentioned in a reply to Struth, for lower mileage drivers, a non-EV tariff maybe much cheaper.