grid intertie [RE-wrenches]

[R. Sparks Scott]

	Carl;

	Answering your qureies:

	1) Yes, any interuuption to the grid feed will initiate a bulk cycle. (See
Below).

	2) Two hours is a pretty long absorbtion time. I'd say cut it back to
something more like 30 minutes, less it the grid is that dodgy. *Remember*
It's NOT the grid that provides the bulk charge, it's the PV's (assuming
that the sun is up). Any current in excess of what is required to maintain
the bulk charge voltage at the batteries is fed back into the grid, so
you're not losing that much, particularly if you are using MPPT technology.

	3) EQ'ing batteries: Let the PV's do it. Just throw the breaker on the SW
off when you want to EQ and allow the charge controller to carry on. The
Trace EQ cycle is not worth bothering with.

	4) This is a little confusing. You're not reffering to the Battery Sell
Volts (Menu item #17) are you? This menu setting will have no effect on a
grid tied system unless you are selling the stored charge in the batteries
by enabling it by setting the Grid Usage Timer (Menu item #18) to something
other than defaults. Simple grid-intertied systems do *not* usually sell
the charge stored in the batteries, so the "Set End Charge Time" and "Set
Start Charge Time" sould be set to the same time (default = 21:00).
	If you are reffering to the MPPT charge controllers, they have to be set
*higher* than the bulk and float settings on the Trace for the set-up to
feed anything back to the grid.

	Sounds like some close observation of the system is indicated to see if
grid fluctuations are responsible for initiating repeated bulk charge
cycles in the SW.
	Good luck.

	-S

- - - - - - -
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  http://www.topica.com/t/17
Newsletters, Tips and Discussions on Your Favorite Topics