Samlexpower PST-3000-12, Owner'S Manual

Page: 33 / 76

32 | SAMLEX AMERICA INC. SAMLEX AMERICA INC. | 33
8.4 DC SIDE CONNECTIONS
8.4.1 Preventing DC Input Over Voltage
It is to be ensured that the DC input voltage of this unit does not exceed 16.5 VDC for
PST-3000-12 and 33.0 VDC for PST-3000-24 to prevent permanent damage to the unit.
Please observe the following precautions:
- Ensure that the maximum charging voltage of the external battery charger / alterna-
tor / solar charge controller does not exceed 16.5 VDC for PST-3000-12 and 33.0 VDC
for PST-3000-24
- Do not use unregulated solar panels to charge the battery connected to this unit. Under
open circuit conditions and in cold ambient temperatures, the output of the solar panel
may be > 22 VDC for 12V nominal panel and > 44V for 24V nominal panel. Always use a
charge controller between the solar panel and the battery.
- When using Diversion Charge Control Mode in a charge controller, the solar / wind /
hydro source is directly connected to the battery bank. In this case, the controller will
divert excess current to an external load. As the battery charges, the diversion duty
cycle will increase. When the battery is fully charged, all the source energy will flow
into the diversion load if there are no other loads. The charge controller will discon-
nect the diversion load if the current rating of the controller is exceeded. Disconnec-
tion of the diversion load may damage the battery as well as the inverter or other DC
loads connected to the battery due to high voltages generated during conditions of
high winds (for wind generators), high water flow rates (for hydro generators). It is,
therefore, to be ensured that the diversion load is sized correctly to prevent the above
over voltage conditions.
- Do not connect this unit to a battery system with a voltage higher than the rated bat-
tery input voltage of the unit (e.g. do not connect PST-3000-12 to 24V or 48V Battery
System)
8.4.2 Preventing Reverse Polarity on the DC Input Side
!
CAUTION!
Damage caused by reverse polarity is not covered by warranty! When making
battery connections on the input side, make sure that the polarity of battery
connections is correct (Connect the Positive of the battery to the Positive termi-
nal of the unit and the Negative of the battery to the Negative terminal of the
unit). If the input is connected in reverse polarity, DC fuse(s) inside the inverter
will blow and may also cause permanent damage to the inverter.
SECTION 8 | Installation