We are on a fixed rate till 2023, so still paying 15.5p a unit, no off-peak. Prices had already started to rise when I got the EV so I stuck with my fixed rate deal.
Even at your peak rate of 40p a unit its still 33% cheaper than our diesel would be based on my average 3.4kw/mile consumption and the diesel on 45mpg. Better still, my work now allows hybrid working so my mileage has dropped by over 12000 miles a year (nigh on £2500 worth of diesel!), so it should not really impact us too much.
I find it scary/crazy that electricity pricing has risen so much so quickly, triple the old costs with more to come.
In life, it's not who you know that's important, it's how your wife found out.