Xantrex Technology SW Series Selling Power - From A Dc Charging Source, Page 85, Legend

OPERATION

SELLING POWER - FROM A DC CHARGING SOURCE

The simplest and default operation of the SW Series Inverter/Charger in the SELL mode is to “sell” the excess power from the charging source to the utility when the batteries are full. In this mode, the battery voltage is held to the regulation level determined by the SET BATTERY SELL VOLTS DC setting. Since the SET BATTERY SELL VOLTS DC setting is defaulted to the same value as the SET FLOAT VOLTS DC setting, the inverter will sell the power from the charging source (wind, hydro or solar, etc.), but will hold the battery at a charged level.

The regulation process can also be accomplished and allow the three stage charging (float, bulk and absorption) of the batteries to occur each day by enabling the BULK CHARGE TRIGGER TIMER (15). The batteries will be maintained at the SET FLOAT VOLTS DC setting until the SET START BULK TIME, which will charge the batteries near the SET BULK VOLTS DC setting until the end of the ABSORPTION TIME.

This operating mode offers the individual system owner with several advantages. The batteries would not be cycled thereby increasing their life and the batteries would be fully charged in case of a power failure, resulting in greater system efficiency.

Begin Day

00:00

Time

DC Volts

DC Volts

13.0

20:00	End Day
	23:59

	Bulk Charge Trigger Timer is		Set Start Bulk
	enabled (not the default setting)		time	20:00
	Battery Sell Volts
Float Volts		Bulk Volts
DC Setting	DC Setting	DC Setting
Set Float	Set Battery Sell	Set Bulk Volts
Volts DC 13.4	Volts DC 13.4	DC	14.4

	Sell to grid period
Charging from the DC	when the current from
	the DC source is greater
source (wind, hydro or
	than needed to maintain
solar) has started
	the Float/Sell Volts DC
	setting.
POSITIVE (+) = Inverter is drawing power from grid.
NEGATIVE (-) = Inverter is selling power to grid.

Set Absorption time h:m 02:00

Absorption Time

Battery

charging from

AC amps

Input
amps AC	00

AC amps to grid (-) {

AC amps from grid (+) {

Max Sell Amps

AC Setting

Set Max Sell

amps AC 30

Charging from the DC source (wind, hydro or solar) has stopped

Max Charge

Amps AC Setting

Set Max Charge

amps AC 30

grid has started

LEGEND

Display/Settings on Control Panel

Information

Figure 27, Selling Power From A DC Charging Source; Hypothetical Time Of Day Operational History

 2001 Xantrex Technology, Inc.	Telephone: 360/435-8826	SW Series Inverter/Charger
5916 - 195th Street N. E.	Fax: 360/435-2229	Part No. 2031-5
Arlington, WA 98223	www.traceengineering.com	Rev. C: February 2001

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