[Homestead] Shaking the grid

Don Bowen don.bowen at earthlink.net
Thu Feb 4 15:50:51 EST 2010


Leslie wrote:
> 2000 watts is not going to going to provide much electricity.  That is 2k for an entire day.  There are some "solar generators" available for low cost that provide that kind of KW.  They are similar to a backup gas generator for short power outages, except instead of an engine they have a deep cycle battery, and a solar panel.  The ones I've seen have wheels and a handle to make moving them around easy.
>   
I doubt if they would provide 2KW for any length of time.  2 KW is a bit 
over 16 Amps at 120 VAC and 166 Amps at 12 VDC.  A T-105 Deep cycle 
battery weighs 45 pounds and two are needed.  Maximum discharge rate of 
a battery is C/20 or 20% of the Ah rating.  For a 220 Ah that is 44 
Amps.  44 Amps in 10 hours will completely discharge the battery and 
that 44 Amps is 480 Watts at 120 VAC.  Plus batteries do not being 
discharged below 50% State of Charge, it leads to a very early battery 
death.

There is no free lunch and god does not exist.

-- 
Don Bowen           KI6DIU
http://www.braingarage.com/Dons/Travels/journal/Journal.html




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