HOME 9
safe charging.
• Discharging Battery
During the standard discharging process, the battery is discharged via the 51.2V Input/Output
Terminals until the battery voltage reaches 48.0V. Safe discharging requires battery temperatures
between -4°F (-20°C) and 140°F (60°C). In order to keep all charging options available, the
battery should be charged once it reaches 20% SOC, Total Voltage ≥ 50.0V and/or
Minimum Cell Voltage ≥3100mV. Discharging the battery below the Total Voltage or Minimum Cell
Voltage can lead to an under voltage fault, which will require the battery to be recovered and limits the
charging options to shore power only.
• Recovery Process
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”.
The Total Voltage, Cell Voltages and SOC will slowly increase. The Warning or Protection Recovery
points will need to be reached to clear (see the BMS Warnings & Protections).
• Battery Maintenance
The battery needs to be maintained above 20% SOC, Total Voltage ≥ 50.0V and/or Minimum Cell
Voltage ≥3100mV. When any of the parameters are met, a recharge cycle needs to take place. This
can be completed by either connection to 120VAC 30A source or starting the engine to allow the
engine driven alternator/generator to recharge the battery.
o If the battery is not recharged, under-voltage disconnects will take place. The high voltage
(51.2V circuit - inverter/charger, engine driven alternator and cabin A/C) and the low voltage
(12V circuit - Firefly, interior/exterior lighting, and water pump) will stop functioning when the
protection level is achieved (see the BMS Warnings & Protections below).
o If the lithium battery is disconnected for under-voltage protections, recharging with the engine
driven alternator/generator cannot take place. It is vital to always keep the battery above 20%
SOC, Total Voltage ≥ 50.0V and/or Minimum Cell Voltage ≥3100mV to avoid the loss of
functionality and recharging options.
• Cold Weather Recovery
Note that in cold weather, when the cell temperature drops below 10°C (50°F), the unit will need
connected to shore power. The self-heat process may take 15-20 minutes to activate and begin
warming the cell temperature enough to re-charge the battery bank. The warming process could take
up to one hour or longer. The inverter/charger will charge at 8A to heat the battery, and once the
minimum cell temperature reaches 5°C the charging contactor will close, and full charging will begin.
• Cycling the Battery
On batteries which have been in storage for longer than (6) months, the state of charge percentage
(SOC%) may read 100% by default. It is recommended to cycle and calibrate the battery to reflect the
correct SOC% and to ensure optimal performance.
1. Power on the battery.
2. Use the solar inverter to discharge the battery until it disconnects. Large loads will help you
achieve this faster such as turning on the air conditioner.
a. Battery with 137.3.1 Firmware = 2600mV on the lowest cell or 41.6V
b. Battery with 137.3.13 Firmware – 3000mV on the lowest cell or 48V
3. Once the battery reaches this point, the Samkoon will power off and the battery will disconnect
from the circuit.
To Next Page
Loading...
Need help?
General
