Depreciation is nearly always the biggest cost. The newer the vehicle, the bigger a hit you're going to take. "Fuel" cost is usually not as big of a concern as depreciation.
You seem to be implying that PHEVs cycle the battery between 0-100%, but I want to clarify that they don't. They are very conservative. For instance, my Prius operates between about 25-85%. In other words, a full charge is only 85% SoC, and empty (engine kicks on) is about 25%.
The vehicle cost of ownership calculator linked in my signature can compare any 2 vehicles, including PHEVs. You'll have to estimate the percent of EV miles you anticipate for a PHEV (it's one of the data fields), but it's as accurate as the assumptions you input. It will break out the various costs, such as depreciation and fuel cost.
Last edited by redpoint5; 07-31-2019 at 05:28 PM..
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