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doesn’t turn off
The contactor in the battery may be
stuck closed
Replace BDU - contact Dehco (See Must Read Before
Operating section on page 2)
The battery charge
doesn't last as long
as expected
The battery may be too cold
(reduces capacity)
Maintain the battery temperature above 23°F (-5°C)
during discharge.
The water heater may be on (high
power draw)
Turn off the water heater, if not needed
The battery cells may be excessively
imbalanced
Contact Dehco (See Must Read Before Operating
section on page 2)
The battery will
not charge
Battery voltage may be too high
Inverter setting #37 is 52V - The unit will need to
discharge before charging
Cell imbalance
If the max cell reads 8,000mV or
similar, the cell is likely
compromised and the battery
Contact Dehco (See Must Read Before Operating
section on page 2)
If the min cell is under 2,000mV, the
cell is likely compromised and the
battery should be replaced
Contact Dehco (See Must Read Before Operating
section on page 2)
Cell Imbalance is determined when:
1. A single cell (max voltage cell)
reaches 3400mV and
2. The voltage difference between
the max voltage cell and min voltage
cell is above 60mV.
1. Review the Samkoon screen to verify the system is
not any alarm state – warning or protections.
2. With the lithium system operational and clear of any
faults, discharge the system to below 53.0V and/or 90%
SOC.
3. Change inverter settings:
A. Setting #9 Boost Charge Voltage = 54.0V
B. Setting #28 Maximum AC Charging Current = 5A
4. Connect the unit to an external 120VAC (up to 30A)
power source.
5. Continue to charge with shore power until the unit’s
cell imbalance has cleared or the Total Current reaches
a consistent 0.0A. If the unit is left in the charging
stage for an extended period, it should be observed
that the voltage difference reduces to under 60mV.
NOTE: Dependent on the lithium battery condition,
balancing may take 1-2 days.
Battery/Cell under-
voltage Warning
on Samkoon
Unit was allowed to continue to
discharge below the
warning/protection thresholds
* Connect the unit to an external 120VAC power
source, and ensure that the inverter/charger power
switch is in the “ON” position
* If the unit exceeded the warning or protection
threshold, allow the unit to charge above 50.4V and/or
3250mV.
* If the unit exceeded the protection threshold, the unit
will need to reach the recover set point and re-start the
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