Xantrex Technology 815-3024, 815-3012, 815-2012, 815-2024 Operating Limits for Charger Operation

Freedom SW 3K2K InvChg Owners Guide.book Page 14 Wednesday, October 9, 2013 1:34 PM

Freedom Inverter/Charger Operation

Operating Limits for Charger Operation

By default, the maximum charger output current is the rated charger output current for the particular model. Using the SCP, you can reduce the total output if you change the maximum charge rate (Max Chg Rate) on the Freedom SW Basic Settings menu or Inverter Settings menu under Advanced Settings.

The charger can operate over an AC input range of 95–135 volts AC. This is the default setting and can be adjusted to 78–145 volts AC as a maximum range and to 110–120 volts AC as a minimum range. The charger can also be configured to accept and operate from a wide AC source frequency of 40 to 70 Hz. The default setting is 55 to 65 Hz. This wide range allows the Freedom SW to charge your batteries even when incoming AC voltage is less than ideal or a 50 Hz source.

Power Share The Freedom SW charger uses AC input line 1 to charge the batteries. The Freedom SW charger shares incoming power with AC loads on line 1 only. The AC loads have priority, which means that the charger will reduce its output with large AC loads and increase the output again when the AC load decreases. The regulatory maximum for continuous AC loads is 80% of the breaker rating that the loads are connected to.

The Freedom SW senses pass-through current going to the AC load. The difference between the pass-through (load) and 80% of the Power Share setting is the current that is available for charging the batteries.

For example, if the AC input of the Freedom SW is from an AC panel with a 30-amp breaker, the Power Share setting on the SCP should be selected as 30-amp. Based on this, the charger will control the charge current so that the total current draw is equal to or less than 24 amps in this case. Should the load current be more than about 24 amps, the charger output will reduce

to 0 amp, but the Freedom SW will continue to supply the loads. The Freedom SW will continue to pass-through power to the loads, even if the load current exceeds the Power Share setting. In this case, it will be up to the user to remove/disconnect loads if tripping the AC input breaker supplying the Freedom SW is to be avoided.

14 Freedom SW Owner’s Guide