@clappedout I would agree with @kezo summary above. For balance, last summer if I did any journeys that were 100% within the EV range of the car, even though I charge on a full price tariff (I don’t have a smart meter / lower nighttime rates etc), they were very cheap.
As an aside, one thing I don’t like about PHEVs is that to properly compare running costs against ICE cars you have to work out a total pence per mile cost, comprising petrol and charging costs. This is because the cars fuel computer assumes that all mileage was driven on petrol, so overstates mpg as it takes no account of charging costs. It’s a bit of a faff, but worth doing to make a fair comparison, as you can then divide this pence per mile into the cost of a gallon of petrol to directly compare against an ICE car. Several forum members in addition to Kezo and myself do this (as do the better online car reviewers – they do the same when comparing public charging costs of EVs against ICE cars).
Anyway, the reason I mention this is that, using this calculation, local journeys made last summer that were 100% within the EV range equated to 80 mpg in an ICE car, something that you would never be able to achieve with a diesel or petrol car. This is where Kezo scores over me with his daily school run. My ‘kids’ are in their 20s and 30s so I don’t have all those local journeys 😂
At the other end of the spectrum, when Kezo and I do long journeys where the petrol engine is doing most of the work (inc recharging the battery), that 80 mpg ICE equivalent drops to high 30s, which is far worse than modern fuel efficient petrol engines, such as the 2.0i BMW that I had before which would be 5-10 mpg better on longer runs.
So, in summary, it all boils down to what someone’s ‘mix’ of local and longer journeys is. Mostly short journeys and a PHEV can save you quite a bit of money – not as much as a full EV would, but better than an ICE car. Mostly longer journeys and it could be a costly mistake. I do a mix of the two and, overall, running costs are a bit lower than they were in the BMW. I’ve worked out that total running costs will around £20 a month less in the PHEV than in my previous petrol car. Personally, that £20 a month saving isn’t enough to offset the faff of having to charge after every use, but I appreciate that for some people it would be. Also, those with a greater proportion of local journeys and / or cheaper electricity costs will make far greater savings than me and, in some cases, substantial savings.