Hong Kong Meet-Up - Sunday 15th May 2011

[markwj]

OK. Scary.

9.2kWh used yesterday. Charging at 13amp (using HPC dialed-down by the car) needed 4hours 25minutes and 15kWh energy.

Tetsous: I think we need feedback from more experienced members here. I'll start a new thread with these results and let's see what people say.

Charging in High Temperature environments 13A vs 32A vs 70A: cost of air conditioning

 

[zack]

Honestly, I don't care if it costs twice as much money to charge the Roadster in a hot environment. It costs me 10 times as much money to fill my Mercedes G55 (which has about the same range as the Roadster) so I'm already so far ahead that hot weather isn't really a problem.

 

[markwj]

Honestly, I don't care if it costs twice as much money to charge the Roadster in a hot environment. It costs me 10 times as much money to fill my Mercedes G55 (which has about the same range as the Roadster) so I'm already so far ahead that hot weather isn't really a problem.

Zack. Yep. I'm about 1/4 the driving cost of my Prius, and 1/10 the Land Rover that preceded that.

The question, though, is whether switching to 70amp (or 32amp) charging, from 13amp, would make a difference. It looks like it does.

 

[zack]

It seems very logical that it's less money overall to charge at a higher rate. The car will always need a minimum fixed amount of current to operate the charging system properly, so the less time you have to run the charger, the less overall cost to charge. Hence, higher current charging is more efficient.