What is the life span of the battery and the cost of replacing it?
Going electric in the city is a great idea - thinking outback and extensive camping trips - I still prefer a diesel model.
Toyota trailed Prius vehicles in their holding yards many years ago to see what the life span of a lithium based battery will be. Result a lot longer than thought.
Short answer to your question. You would expect 15 years life in a Tesla battery.
Cost to replace - Moore’s Law is at play here. A MW battery built 2 years ago is around 1.3 times more expensive than one built today and this keeps a decreasing. So it’s irrelevant at what it costs to replace today as it’s covered by a long warranty and the price in 7 years (end of warranty) is unknown but will be dramatically cheaper than today.
Agree on standard thermal cars for longer trips, once hybrid diesel with particulate filters and NO catalytic reducers are available - will be a game changer for sparsely populated areas like Australia.
On batteries life span if anyone is interested:
Technically you can work this out by calculating a number for factors:
Capacity of the battery and it’s C rating rating.
Capacity is normally quoted in amp hours. (Ahs) then it’s how quickly or slowly you discharge the battery. This is the C rate measured in Ah.
Battery of X rating at the Cn rate will provide a constant current of X/n amps for n hours before being fully discharged or flat.
From here you select a battery that provides this need Amps over time so that you don’t fully discharge it - using a discharge curve for the applicable C rating (match to system voltage here). Combine this with the depth of discharge life cycle table for the type of battery.
(Note to allow for system degradation over time before calculating total Amps needed.)
Now with all of this, you will find a variety of batteries with different costs will meet your requirements- undertake an economic assessment using a standard capital recovery calculation. Best NPC is your battery choice.