Xantrex Technology 815-2012, 815-3024, 815-3012 Stack Charging, Generator Assist, Introduction

Freedom SW 3K2K InvChg Owners Guide.book Page 4 Wednesday, October 9, 2013 1:34 PM

Introduction

Stack Charging

Multiple Freedom SWs synchronize charging stages to ensure efficient charging of the battery bank. When a single unit transitions from bulk to absorption so do all other units. In absorption, all units must complete the absorption stage before transitioning to the next stage. Note that units do not load share when charging except during the bulk stage. The Freedom SWs stop sharing charge current just before completing the bulk stage. The units do not share charge current during the absorption and float stages.

Each unit charges batteries based on the Max Charge Rate setting and active internal (temperature-based) deratings.

If equalization is enabled on one or more devices capable of equalization charging, only those devices perform an equalize cycle after absorption. Other devices transition to float (if three-stage charging is selected) or transition to AC pass-through (if two-stage charging is selected).

Generator Assist

The Freedom SW Series of inverter/chargers can operate in tandem with a generator to temporarily assist power loads with large start-up demands such as air conditioners, water pumps etc. A Xanbus AGS must be installed in the system in order for this feature work.

When this mode is enabled and generator capacity defined, the inverter will come on-line and assist the generator when the generator reaches its capacity. The battery bank must be well charged in order for the inverter to engage this mode. For more details, see “Gen Support” on page 53.

4 Freedom SW Owner’s Guide