On 20/10/2020 17:47, The Natural Philosopher wrote:
On 20/10/2020 16:29, Roger Mills wrote:
Although a lot of my journeys are short, I do enough long journeys to
a BEV unviable with the range currently available. Hopefully battery
development will yield higher capacity batteries without increasing
the size and weight. Even so, a full charge will then take longer.

fast charging is something batteries can already do - a one hour flat to
full is well within lithium capabilities, but I haven't seen much in the
way of better energy to weight in the last ten years. Cost is about half
what it was ten years ago.

The limits on fast charging is really the local last mile grid. Few
houses have 100A fuses and that is the limit for a normal domestic
installation. 25kW will still take 4 hours to cram the electrons into a
100kWh battery...leaving nothing left over for the mandatory house
heat-pump.



Indeed. The fastest home charger is currently 22kW, and that requires a
3-phase supply - which few people have. Otherwise it's a maximum of
around 7kW.
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Cheers,
Roger