Xantrex Technology SW Plus 4024 - Manual (Page 51)

Pre-Configuration Planning
976-0043-01-02 2–17
disconnect switches. A sample of this warning label is provided in Figure
2-2 . These labels are not available or provided by Xantrex, but may be
available from your local electrical warehouse.
DC disconnects and
overcurrent devices The size of the bonding jumper must be the same gauge as that of the
primary battery cable in which the overcurrent device (DC disconnect) is
installed, and as always, the overcurrent device must be sized
appropriately for all cables attached to it. If one overcurrent device trips
then there will be only half the amount of current available for both
inverters to run from. If you want to run only one inverter while the other
is shut down (for example, for maintenance procedures), the positive
bonding jumper must be removed or there must be an appropriately sized
switch installed in the bonding jumper.
Battery Temperature
Cold temperatures Cold temperatures drastically reduce battery capacity and performance.
Therefore, the battery enclosure should provide a fairly stable temperature
for the batteries. If batteries are installed in a cold environment, insulation
should be installed to protect the batteries from the cold. The insulation
will act as a barrier to the cold and also keeps the heat generated by the
batteries inside the enclosure providing a more stable temperature and
better system performance.
Hot temperatures High battery temperatures shorten the life of the batteries. The battery
enclosure should not be installed in direct sunlight where the sun can
overheat the batteries. Locate the enclosure where it will be protected
from the sun and provide vents in the top and bottom of the enclosure to
provide air flow throughout the enclosure.
For best performance, locate the batteries where they are in a room
temperature of 20 to 25 °C (68 to 77 °F)
Battery temperature
sensor A Battery Temperature Sensor (BTS) is provided with each Sine Wave
Plus . This sensor can easily be installed in the system to ensure proper
charging of the batteries based on temperature. Installing a sensor extends
battery life by preventing overcharging in warm temperatures and
undercharging in cold temperatures.
Figure 2-2 Sample Warning Sticker for Backfeed Conditions
WARNING: Shock Hazard
Load side terminals may
be energized by
backfeed.
Not provided by Xantrex.
May be available at your local
electrical warehouse.