Hello, FIRST As You probably know Renault Zoe have 3-phase 43 kW onboard charger. smart for two electric drive have about 3 kW onboard charger. Optional 3-phase 22 kW cost about $3500. Tesla Model S have 10 kW onboard charger. Optional upgrade to 20 kW cost about $1500 So in smart, upgrade from about 3 to 22 kW -> 19 kW for $3500 = $184/kW In Tesla Model S, upgrade from about 10 to about 20 kW -> 10 kW for $1500 = $150/kW Lets say onboard charger in Renault Zoe cost $150/kW. 43 kW charger in Zoe cost then $6450! Lets say optimisticaly it cost only $100/kW. 43 kW charger in Zoe still cost $4300! Few thousands is about 25-30% of its price without battery. So, Zoe with 3 kW charger should have even few times more sales. Why they didn't chose small onboard charger? SECOND If fast DC charge (50 kW CHAdeMO or other standard) cost about $10 for use to be profitable how many uses can buy for $5000 instead of high power onboard charger? 500? Once a week it means 10 years! And I still have money on begin, less weight of the car, etc. THIRD If You even have higher power onboard charger, what will be the cost of use it? I think also about $10 because costs of power is similar. You have 3 times cheaper AC terminal then DC charger but often it will not be used with optimal power. Ex. 43 kW terminal and charging 22 kW smart or 3 kW smart. So the price of use will be same. FOURTH If EVs are future. Lets say 1 milion EVs. You need 1 milion x $5000 for 43 kW onboard chargers to give all chance for fast charge. It is $5 000 000 000!!! Alternatively for 1 milion EVs You can build 10 000 DC chargers for $30 000 each (15-20k for charger and 10k for instalation). It will cost $300 000 000. 16x less!!! More EVs on the market, more sense is for DC infrastructure. Do calculations for 10 milions and You will see. FIFTH Even low power AC charge points don't have economical sens. Less energy sold, higher price must it have - 3-4x more than average energy cost in household. AC fast charge, especially with power over 20 kW is no brainer for me. Good that Tesla selected DC 90-120 kW. 10-20 kW onboard for private use in home is ok because big battery packs.