sol-ark 5K - Battery Charging Information

April 21, 2021 31
▪ Max A discharge: set max discharge for battery bank (In off-grid mode, the battery bank will
discharge 120% of this value for 10 seconds before the inverter shuts down to prevent battery
damage)
▪ TEMPCO: Temperature coefficient used in conjunction
with the batt temp sensor to adjust optimal voltages for
lead acid batteries
▪ Use Batt V charged: displays battery charge in terms of
voltage
▪ Use Batt % charged: Battery voltage can be misleading for
determining the % Charged. So, we use algorithms
measuring power in and out to measure a true value for %
Charged. It compensates for aging batteries also.
o Charge
▪ Float V: Set value appropriate for the batteries connected to the system using chart (Page 36)
▪ Absorption: Set value appropriate for the batteries connected to the system using chart (Page
36)
• Absorption will stop at 1% of the capacity of the battery bank and drop to float
• Ex: 400Ah battery would be 4A
▪ Equalization: Set value appropriate for the batteries
connected to the system using chart (Page 36)
▪ Days: period between equalization cycles
▪ Hours: period taken to equalize batteries
• Note if Hours = 0 system will not equalize the
batteries
▪ Gen Charge: uses the gen input of the system to charge
battery bank from an attached generator.
• Start V: voltage at which system will AutoStart a connected generator to charge the
battery bank
• Start percentage: Percent S.O.C at which system will AutoStart a connected generator to
charge the battery bank
• A: charge rate from the attached generator in Amps
o Note: size this value appropriately for your given generator size
▪ Grid Charge
• Start V: voltage at which system will charge the battery bank from the grid. If grid is on,
batteries will stay at float voltage.
• Start percentage: Percent S.O.C at which system will AutoStart a connected generator to
charge the battery bank
• A: charge rate from the grid in Amps
o Discharge
▪ Shutdown V: battery voltage at which the inverter will
shut down (batt symbol on home screen will turn red)
▪ Low Batt: Low battery voltage (batt symbol on home
screen will turn yellow)
▪ Restart: battery voltage at which AC output will resume
▪ Batt Resistance: used in % SOC batt calculations
▪ Batt Charge Efficiency: used in % SOC batt calculations
▪ Batt Empty V: sets reserve capacity and improve % SOC calculations. It is not Batt_I adjusted.
• (Recommendations: 45V for AGMs, 48V for Lithium Iron Phosphate)