Im trying to get my head around the merits of a second charger for long trips outside superchargers. Say you can drive/charge for 15 hrs max per day & have a 90D 20degC no A/C in use. 8 hrs to charge.@ 11kWs 4 hrs at 22kW driving one person. Single charger 70 kphr range 732ks 10.4 hrs driving charge 3 hrs ( 33kWhrs) drive 2 hrs @ 100kph 200 ks charge onight Total dist 932 ks Dual charger 100kphr range 512 ks 5 hrs driving 4 hrs charging drive another 512 ks 5 hrs and charge 30 mins drive 30mins 50ks full charge onite. Total dist 1074 ks. This ignores weight penalty of the 2nd charger. To spend many $ks to gain 142ks per day doesnt seem worth it. The range data comes from Tesla.