There’s always leasing, you might consider it rather than lose the value in depreciation? I know a few people going for it as they didn’t want to spend £40k on models which will be much cheaper in a contract term as the technology is moving so fast. Again it depends how much miles you do, wether you can charge for the cheapest possible tariff, all the factors which can bring electric miles down to less than half the petrol mile. When we got ours my calculation was the petrol was £50 a week, moved to £10pw charging from home so I put that £40pw (£160pm) to the monthly on the purchase cost. It can work out really well is what I mean

https://www.selectcarleasing.co.uk/hybrid-electric-cars/special-offers