Xantrex Technology PH1800 manual Battery Charger Features, Three-Stage Charging Process on

Introduction

Battery Charger Features

Charging	The Battery Charger in the PowerHub 1800 has three pre-set charging
Settings	profiles.
	• 40 A Profile (Default Setting). With the 40-amp Charging Profile, the
	maximum bypass power for AC output to loads is approximately
	600 W (4 A) with a 15 A input breaker. Use this mode to minimize
	battery charging time.
	• 10 A Profile. With the 10-amp Charging Profile, the maximum
	bypass power for AC output to loads is approximately 1400 W (12 A)
	with a 15 A input breaker. Use this mode when other DC charging
	sources are available, or if there is a high demand on AC output with
	battery charging a low priority.
	• 0 A Profile. When Charger Setting 0 A is selected, the Battery
	Charger is disabled and will not charge the batteries. Use this mode if
	other DC charging sources are available or if it is necessary to
	temporarily disconnect the AC charging system.
	See “Battery Charger Specifications” on page A–3 for details on the
	specific profile parameters.
Charging	The Battery Charger uses a three-stage charging process to maintain the
Process	battery (or batteries) in operational condition. This process is illustrated in
	Figure 1-3, “Three-Stage Charging Process” on page 1–6.
Bulk Stage	The bulk stage will start upon connection of AC and with the unit turned
	on. The constant current mode is limited to 40 A or 10 A depending on
	setting. The voltage setpoint for this stage is 14.2 Vdc. The Charger will
	transition to the Absorption Stage upon reaching the bulk voltage
	setpoint.
Absorption	In the Absorption Stage, the constant voltage mode is limited to 14.2 Vdc.
Stage	The current will drop as the batteries charge. Upon dropping to 4 A, the
	unit will transition to the Float charge. This stage will not exceed 4 hours
	maximum.
Float Stage	In the Float stage, the constant voltage mode limited to 13.7 Vdc. An
	8-hour timer is started at this point.
	If, during the 8-hour timer, the current rises to 6 A, the unit transitions
	back to the Bulk Stage and starts over.
	If the unit stays at 4A or less for the entire 8 hour timer, it will transition
	to Standby Mode.

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