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4. To begin the recovery process, connect the RV to an external 120VAC (up to 30A) power
source, and ensure that the inverter/charger power switch is in the “ON” position. The battery
will begin “clicking” and the Samkoon will turn back on. The SOC% will slowly increase. It is
imperative to try to recharge the battery completely so that it undergoes a complete cycle.
NOTE: It is recommended to shut down any non-critical loads to allow the battery to recharge
quicker.
• Calibrating New or Replaced Batteries
When the unit is depleted below 10% SOC, this can cause the SOC% and voltage levels to be out of
calibration. If the SOC% is incorrect or out of sync, then it is important to charge the battery
completely to resynchronize calibration.
1. Ensure the battery is ON.
2. Ensure that the remote inverter/charger power switch is in the “ON” position. The button
should be pushed in to power and green light showing.
3. Change the inverter setting #9 to 54.4V.
4. Connect the unit to an external 120VAC (up to 30A) power source.
5. The battery will begin “clicking” and the Samkoon will turn on. It is imperative to charge the
battery to 100% completely.
6. Change the inverter setting #9 to 54.0V.
• Cell Imbalance
Cell imbalance refers to a condition in which individual cells within a battery module have variations in
their electrical characteristics, such as voltage, capacity, or internal resistance. These variations can
lead to unequal performance among cells, potentially impacting the overall performance, safety, and
longevity of the battery system.
To catch cell imbalances, we need to observe them at a different reference point and not when the
batteries are fully charged. Fully charged LFP cells have an acceptable cell voltage differential that can
grow due to chemical variability, aging of the cell, and balancing, and be perceived as widest in the
fully charged process but not necessarily indicative of a cell imbalance. Therefore, you also won't find
balancing occurring during the end charge process. Balancing occurs in the recharging process.
When reviewing the Samkoon screen, there are several parameters which will require a mandatory
stoppage of this inspection and repair procedure. Immediately contact Patrick Distribution (1-800-621-
2278 or email renogy-oem@patrickind.com
) for approval to replace the lithium battery.
WARNING: Do not attempt to charge the battery with the following conditions:
o If the voltage difference between the min and max cell voltage is greater than 800mv.
o If the battery total voltage is less than 32V.
o If the max cell reads 8,000mV or similar.
o If the min cell is under 2,000mV.
When determining cell imbalance, the charge source should be disconnected and the battery idle to
observe the actual voltage difference gap between the maximum volt cell and the minimum volt cell.
Cell imbalance is determined when the differential has grown beyond 300mV.
Note: At 500mv cell differential the Samkoon will report a Level 1 warning and at 800mv cell
differential the Samkoon will report a Level 2 protection. Only when the cell differential has been
closed to below 300mv will the error on the Samkoon clear.
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