Product Manual

Inverter Operation Using the Front Panel
975-0638-01-01 Rev E 3–7
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 Conext SW Basic
Settings menu or Charger Settings menu under Advanced Settings.
The charger can charge batteries when the AC input voltage line-to-neutral is
within the minimum and maximum range of 95 to 135 VAC. They are the default
minimum and maximum settings. The minimum range setting can be adjusted
from 78 to 115 VAC and the maximum range setting from 125 to 140 VAC.
The charger can also be configured to accept and operate from a wide AC
source frequency of 44–70 Hz. The default setting is 55 Hz for low frequency and
65 Hz for high frequency. This wide range allows the Conext SW to charge your
batteries even when incoming AC voltage is less than the typical 60 Hz.
Power Share The Conext SW charger uses both split-phase lines AC INPUT L1
and L2 to charge the batteries at full capacity. However, if only AC INPUT L1 is
used, charge capacity is reduced to 50%. Consequently, the Conext SW charger
shares incoming power with AC loads on both split-phase lines with a current
limit of 30 amps for charging and pass-through AC. However, when AC is
qualified only on one line at AC INPUT L1, the current draw from that input is
limited to 15 amps (SW 4024 120/240) and 13 amps (SW 2524 120/240) for
charging and AC pass-through. 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 Conext 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 Conext 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 zero (0) amp, but the
Conext SW will continue to supply the loads. The Conext 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 Conext SW is to be avoided.
ConextSW-NA-OwnersGuide.book Page 7 Thursday, July 23, 2015 3:26 PM