Xantrex PH1800 User Manual download pdf (Page 23)

Introduction

975-0288-01-01 1–5

Battery Charger Features

Charging

Settings

The Battery Charger in the PowerHub 1800 has three pre-set charging

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

Process

The Battery Charger uses a three-stage charging process to maintain the

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

Stage

In the Absorption Stage, the constant voltage mode is limited to 14.2 Vdc.

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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Xantrex PH1800 User Manual Page 23

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