Trace original Modifications [RE-wrenches]

[Carl Emerson]

"R. Sparks Scott" wrote:

> >Now in order to prevent the trace from charging from the grid, the
> >suggestion is to lower the float to say 48 volts.
>
>         Carl;
>
>         There is one error in this logic, and that is assuming that lowering the
> Trace float voltage will prevent it from charging the batteries. In grid
> intertie mode, the Trace *is* the charge controller, so if you set it to 48
> volts, that's what your batteries will float at even though the wind and
> PV's are cranking amps into the battery bank. The excess current goes into
> the grid.

Sparkes...

Thanks for your patience with the new boy on the block...

I take it you mean that the lowered float voltage setting will over-ride the sell
voltage setting and that the sell back will begin at the float level rather than the
sell level ??

>
>         Additionally, the major loss of efficiency isn't the actual current going
> into the batteries from the Trace, but the copper loss and eddy currents in
> the three transformers in the SW inverter. My 1800 Ah,12 volt bank floats
> just fine on 1½ amps, but the Trace consumes about 120 watts to produce
> that trickle charge.

Thanks for underlining this point and in so doing bringing back into focus the need
to keep any charging from the SW to an absolute minimum.
--
Regards,


Carl Emerson
Manager
FREEPOWER LTD.  "Harnessing Natural Energy"


- - - - - - -
To send a message:
 RE-wrenches at topica.com

The archive of previous messages: 
 http://www.topica.com/lists/RE-wrenches/

To unsubscribe send a message to: 
 RE-wrenches-unsubscribe at topica.com

To check out the other RE-Wrench participants:
 www.mrsharkey.com/wrenches/index.html

Hosted by Home Power magazine: 
 www.homepower.com

For info contact list moderator by email:
 michael.welch at homepower.com

___________________________________________________________
T O P I C A  The Email You Want. http://www.topica.com/t/16
Newsletters, Tips and Discussions on Your Favorite Topics