🚀 go-pugleaf

In article <1993Jan23.061702.18014@mnemosyne.cs.du.edu> rcanders@nyx.cs.du.edu (Rod Anderson) writes:
>In article <1993Jan23.000753.14523@michael.apple.com> ems@michael.apple.com (E. Michael Smith) writes:
>>It seems like an incredibly stupid question to me, but I've got
>>to ask it ...
>>
>>Pondering this ...  Why not just use a 120 VDC battery pack and use
>>120 VDC for a bunch of stuff?  Lightbulbs don't care if they are
>>AC or DC, nor do electric stoves and ovens or other resistive heat
>>sources.  Some tools have AC/DC motors.  120 VDC was a common motor
>>type not too long ago, so I'd expect some motors to be available
>>for things like house fans.
>>
>If you use a 12 volt system you can start out with one set of batteries
>and add capacity in parallel.  If you are on 120 volts dc you have 10
>times the number of cells.  The initial cost for a 120 volt system will be
>much higher. 

In addition, there will be ten times the number of cells in series.  Any one
cell failure can ruin a bank.  Ideally all cells in a series bank should be
of equal age and capacity.  Personally, if there weren't this little
resistance problem I'd rather have everything be 2 volt (or 1.2 volt)
and run the world on very low voltage.  There'd be no electrocution.
But since R rears it's head this isn't practical.  It's really not
much of a problem since high efficiency inverters have become
available.  BTW, some larger set ups *do* run 120VDC and use a
specially designed inverter to convert to AC.  

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