[ExI] Lessons from Tesla?

spike spike66 at att.net
Thu Sep 25 23:19:32 UTC 2014

>... On Behalf Of Keith Henson
Subject: Re: [ExI] Lessons from Tesla?

On Thu, Sep 25, 2014 at 5:00 AM,  Tomaz Kristan <protokol2020 at gmail.com>

>>... In the end, the AC of Tesla is going to go away, the DC of Edison will

> prevail.After more than a century, Edison is to be right.

>...I sort of doubt it.


The penetration of DC customer service that's left in a few places dates
from a century ago.

Which gives you an idea  of how long these things take to change.


AC and DC do two different things.  The question isn't AC or DC, it is more
about how we will use both.  In fact we do use both: our computers and ever
more now, our home lighting, uses DC.  Our home heating systems use AC to
run the air handling motors.  If we get all-electric cars, they operate on
DC.  To charge them with AC, we need to convert it, which is costly and
requires big capacitors.  We can imagine rooftop solar collectors charging
cars without ever going thru AC.  For long haul transmission of electric
power, AC works great.  

We will have both AC and DC for the foreseeable, assuming we build a lot
more generating capacity.


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