question/battery-grid charging [RE-wrenches]

[Bob-O Schultze, Electron Connection]

<x-flowed>Yo Jay,
If you are looking to save maximum $$ on the power bill then:
You don't say whether your customer has Time OF Use (TOU) metering. 
If he/she does, it seems a no brainer to use the grid timer ASSUMING 
that a daily cycle is fairly shallow, say 20-30% or less. Without 
TOU, I'd probably go with the LBX mode and set the crossover at 
whatever 20-30% works out to be. Got a A/hr meter in the system?
If the absolute longest battery life is the criteria, then keep them on Float.
You want both? Ha!
Bob-O

>Hi All,
>
>Heres the question.
>
>I hooked up a customer to his neighbors house ( 1100' using 2/0 AL 
>wire, ) which
>is Grid connected. The customer has a existing 4048SW inverter, small battery
>bank ( 8 golf cart batteries) there are no PV in this system.  I have the  AC1
>input currently at 25 amps, with only a 6v drop.
>
>Now my question is this.  Whats the best way to run this new system?  Keep the
>grid on all the time?( UPS) or Use the grid timer say late at night 
>and use the
>batteries? I can do the logic a few ways, but maybe someone has already done
>this?
>
>What would use the least amount of power ( hence money) but keep 
>battery life as
>high as possible?
>
>( other data:: mostly its a small use house, used to being on
>generator/inverter.  Just the usual small loads: refer, lights, fan, dish tv,
>etc.  )
>Thanks,
>
>jay
>
>Peltz Power

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