Xantrex Technology RS3000 - Manual (Page 42)

Operation
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Operating Limits for Charger Operation
The maximum output current for the RS3000 is 150 amps. You can
reduce the total output if you change the “Max Chg Rate” setting on the
RS3000 Advanced Menu or the maximum “Power Share”setting on the
RS3000 Basic Menu.
The charger can operate over an AC input range of 90–135 volts AC. This
is the default setting and can be adjusted to 85–145 volts AC as a
maximum range and to 110–120 volts AC as a minimum range.This wide
range allows the RS3000 to charge your batteries even when incoming
AC voltage is less than ideal.
Power Share
The RS3000 charger uses AC input line 1 to charge the batteries. The
RS3000 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 RS3000 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 RS3000 is from an AC panel with a
30A breaker, the Power Share setting on the System Control Panel should
be selected as 30A. Based on this, the charger will control the charge
current so that the total current draw is equal to or less than 24A in this
case. Should the load current be more than about 24A, the charger output
will reduce to 0A, but the RS3000 will continue to supply the loads. The
RS3000 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 RS3000 is to be avoided.