• Some inverters have higher input capacitors whose current draw overwhelms the pre-
charge function of the HLX+. To minimize the initial draw when the batteries are initially
connected to the inverter, make sure that the inverter is off while connecting. Then wait at
least 45 seconds before powering up
the inverter.
15. Why does the HLX iT show short circuit events in
the log?
• When the battery is connected to a DC load or a charging current the pre-charging function
of the battery is enabled. That pre-charging function is used to compensate for the surge
capacitors on the input side of inverters and other devices. The order of connecting devices
may trigger the short circuit protection in the BMS once the high inrush device (usually an
inverter) is connected. The solution here is to disconnect all devices from the battery (even
battery monitors), first connect the inverter, wait 45 seconds and then connect the remain-
ing devices.
16. Do high temperatures affect how the batteries per-
form?
• Yes, the battery cycle life will be reduced if they are regularly charged and dis-
charged above ambient temperatures of 100 degrees F. Please see the environmental
specifications.
17. Do low temperatures affect how the batteries perform?
• At 0°C (32°F), if there is a charging current, the HLX+ will try and warm themselves up to
5°C (41°F).
• Please note battery capacity is reduced by 20% as its internal temperature falls between
room
• Temperature (approximately 77°F (25°C)) and just above 32°F (0°C).
18. Why is the voltage shown in HLX iT not the same as
what is measured at the terminals?
• The gap between the volts shown in HLX iT and the volts measured at the terminals can be
as large as 0.3 V, especially near the middle of a charge / discharge cycle. The gap closes
at the beginning and end of a cycle.
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