Charging a flat battery

Charging Instructions 

this process will require an electrically qualfied/comptent person to conduct the charging from a DC power supply. if the battery is lower than 44v contact Sunsynk to get assistance with charging

Equipment needed: 

•                             

  Lab power supply with a max. voltage of ≥ 60 Vdc, ≥ 1 A current capability, preferably 5 A or more, and 

                             

  a constant-current capability. Examples include: Wanptek DPS605U and VOLTCRAFT PPS-11815 

                          
•                             

  Cable kit CA03 with M8 ring terminals on one end of the power cables (power supply side) and 

                             

  PSRP6X hot-plug connectors for the battery side. 

                             

  Procedure: 

                          

1.                             

   With the power supply disconnected from the battery, set it to charge voltage of the battery in Vdc if you wish to fully charge the 

                              

   battery. If you just wish to raise the voltage to 52.4 V for further storage or shipping, set the target voltage of the power supply to 52.4 V. Set the max. current to 1 A. If the power supply has a constant- current (CC) and over-current protection (OCP) switch, make sure it is set to CC to provide a constant charging current. 

                           
2.                             

   Turn off the power supply. Make sure the battery power switch is also turned off. 

                           
3.                             

   Connect the power supply to the battery power terminals with the CA03 cable kit. Make sure to 

    observe the correct polarity! Leave the power supply off.                         
4.                             

   Turn on the battery. 

                           
5.                             

   Turn on the power supply. Within a few seconds the current should stabilise to 1 A and the power 

                              

   supply will show the actual battery voltage (of course with the slight charge of 1 A). Alternatively, you may also measure this voltage with a multimeter while charging with 1 A. Write this voltage down. If it is lower than 44.0 V, connect UIWARE/ Battery Upper computer to the battery as quickly as possible and read the individual cell voltages. Make sure no cell is below 2.0 V. Stop charging and contact Sunsynk if any cell is below 2.0 V. Continue if the total battery voltage is >44.0 V and/or if no cell is <2.0 V. 

                           
6.                             

   You may increase the current up to 5 A or more, depending on your power supply maximum (no more than 50 A) for further charging, if the battery voltage was ≥48.0 V as noted in step 5. If the voltage was between 44~48 V, charge with 1 A until at least 48 V, then the current may be increased to 5 A. 

                           
7.                             

   Once the current reaches zero (if fully charging), or <0.1 A (if charging until 52.4 V), the charging process is finished. Turn off the power supply and then turn off the battery.