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53
June 2020
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Solar Stik
®
, Inc.
24VDC PRO-Verter 5000-120 AGS Operator Manual
Dead Batt Charge
This fault indicates that the PRO-Verter is connected to a 120 VAC source and is attempting to close
its internal relay and begin charging, but it has detected less than 18 volts on the battery bank or
determined that no battery is present.
When the Li Expander Pak is discharged below 20 V, the internal Battery Management System (BMS)
will disconnect the internal cells from the battery terminals in order to protect them from further
discharge. When this occurs,
BATTERY STATUS LED will also be blinking red (or be off) on the Li
Expander Pak 2400s .
It is possible that the terminals will still reflect voltage ranging from 2 V to 12 V. This is known as
“bleed voltage” and is the result of the BMS not being able to fully disconnect from the internal
battery cell strings. As a result, there may be enough voltage present for the PRO-Verter LCD user
interface to register the “DEAD BATT CHARGE” fault; however, there will be insufficient charge
remaining in the Li Expander Pak 2400s to allow the PRO-Verter to function properly or to autostart
the generator.
Solution
1. Check the DC voltage at any of the PRO-Verter’s DC terminals (Inter-Connect ports) and
compare it with the DC voltage at the battery bank. These two voltages should be very close
(< 0.5 VDC difference). If not, ensure all connections are tight and the power switch on each
Expander Pak is turned on.
2. Restart the System using the System Recovery Button/Function. See
for instructions.
This fault automatically clears once current flows into the battery from the PRO-Verter / battery
charger—this may take anywhere from a few minutes to a few hours, depending on the condition of
the batteries. This fault can also be cleared if the AC input is removed.
FET Overload
This fault message indicates the PRO-Verter was running normally, but the temperature of the field
effect transistors (FETs) started rising abnormally fast.
Solution
Allow the inverter to cool down, then press the INVERTER ON/OFF button (manual restart) to resume
operation.
To resume normal operation, reduce the load to within normal operating parameters. Shade the
PRO-Verter to reduce solar loading. Clean the air filters if they are dirty. If this fault does not clear
after doing the power reset, the inverter will require service contact Solar Stik Technical Support.
High Battery
The inverter has turned off because the battery voltage is at a very high level. This fault message
displays and the FAULT (red) LED turns on when the battery voltage is above the High Battery Cut-
Out (HBCO) value. This fault automatically clears and the inverter resumes operation when the
battery voltage drops 0.6 VDC below the HBCO value. This fault can occur whether the inverter is
“inverting”, “searching”, or “off”.
