I really liked the idea of the DIY concept and not being tied to a main dealer. Unfortunately I can't see our Health and Safety brigade allowing them here. (As I think I have mentioned previously, my son-in-law is a BMW Master Tech, but still not allowed to 'look under the bonnet' of an electric motorcycle.I think they would have fifty kinds of fits at the idea of a member of the public doing so.)
The problem here is, common sense simply does not apply when working on electric cars, with voltages in the range 300 - 450 volts connected to very high energy battery packs, and sneaky capacitors holding enough energy to kill or maim.
On top of that, this is all connected to electronic control systems priced at £1000's per board, and there are few standard isolation methods yet.
Isolation systems are becoming standardised but slowly so the normal mechanics, "bung it back together and see if it go's" at best can be expensive or at worst can end with a big explosion and a few dead.
With later EV's we are talking 100+kWH, converted to say TNT equivalent.
1 kWh = 3.6 million joules (MJ)
Therefore, 100 kWh = 100 × 3.6 MJ = 360 MJ
TNT Equivalence:
1 gram of TNT releases about 4,184 joules (J) of energy
1 kilogram of TNT releases about 4.184 million joules (MJ)
After the number crunching it works out at 86 Kg of TNT!
Whilst TNT releases its energy differently to a battery, I think people have not got much of an idea of what 100kWH is.