ok thinking out loud.
66kwh = 200 miles claimed 286 but thats usually a lie.
my journies arent great
gym 5miles return
docs 4 miles return
hosp 20 miles return
dobbies 6 miles return
morrisons 7 miles return.
apart from visiting car dealers i havent left the house since november, sad i know.
but lets say i get my s**t together and i go and do my physio 5 times a week thats 25 miles.
that would be my main journey so 200 range less 40 (20%) leaves 160 miles thats 6 weeks journies with 10 to spare.
if you add a doctors and a hospital thats 2 weeks worth in a week so reduces it to 4 weeks.
i reckon unless i find a hobby or something once a month will work absolute worse case 2 in a month.
assuming i go all the way to 20% thats 53kwh @ say 60p =£31.80.
for context i filled up £50.70 on the 5th november and i still have half a tank.
so the electric will be more expensive per mile but not prohibitavely.
so at the moment i am minded to go the whole hog and get the monochrome.