April 21, 2021 13
14. Programming Battery Settings
a. Battery Capacity
i. This allows Sol-Ark to know the size of the battery bank. The system is also self-learning as batteries age.
ii. Main Menu → System Settings → Battery Setup → Batt → Batt Capacity
b. Use Battery Voltage or % Charged
i. Use whatever you are comfortable with. Most installers prefer voltage, while most homeowners prefer
% Charged. (Note: if Lithium BMS is selected but not present, Sol-Ark will force Voltage mode)
c. Battery Charge & Discharge Current
i. For a list of settings for commonly used batteries see the application note section of this manual.
ii. For AGM and Flooded, we recommend Ah battery size x 20% = Charge/Discharge amps
iii. For Lithium, we recommend Ah battery size x 50% = Charge/Discharge amps
iv. For Gel, follow manufacturer’s instructions.
v. When Off Grid, The Sol-Ark will shut down if Max discharge current is exceeded for 10 seconds.
d. Battery Type
i. Navigate to the charge menu and set the values appropriate to your battery chemistry. The owner’s
manual is good reference for lead acid batteries.
ii. Main Menu → System Settings → Battery Setup → Charge
e. Supported Battery Chemistries (48V configuration required for all chemistries)
i. Lead Acid
▪ AGM, Gel, Wet
ii. Lithium
▪ NMC, LiPo4
iii. NiFe (Note: must use a 37 series cell configuration, 44.4V Nominal)
▪ Set Absorb and Equalization to 61.0V, 3 hours, and days = 1 (every day). Float = 53.7V
f. Battery Discharge
i. Allows the user to define the depth of discharge the system will allow before using the grid/generator to
the charge the battery bank. Solar is always the priority in charging the battery bank.
ii. Main Menu → System Settings → Battery Setup → Discharge
15. Grid Setup
a. Grid Sell: maximum watts sold to grid
b. Limited To Home: Limits power produced by the system to match the demand of the home
c. Limited To Load: Limits power produced by the system to match the demand of connected loads
d. Time of Use: Use battery power to support the programmed mode at selectable times/watts/DoD
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