Setting Up Sol-Ark Open-Loop Configuration

Touch the Sol-Ark screen to:

• Navigate the Sol-Ark onscreen menus.

• Enable parameters.

• Activate the adjustment of values.

• Save all onscreen settings.

Values are adjusted using the keypad.

Enable parameters with a CHECKMARK, and disable parameters by leaving them unchecked. Touch a WHITE box onscreen to activate the adjustment of that value. Selecting parameters that have been enabled and disabled alters values that are available to be adjusted.

• A WHITE BOX indicates values that can be adjusted.

• A GREY BOX indicates values that cannot be adjusted, and any data displayed should be ignored.

If necessary, configure Sol-Ark inverters to operate in parallel before setting the parameters for battery operation.

Batt Capacity

Set to the number of Discover Lithium batteries x Ah capacity of each. For example, set to 200 Ah (2 x 100 Ah) for two AES RACKMOUNT 48-48-5120 batteries.

Max A Charge

For a single inverter: set to the lesser of the inverter’s max charge capacity, or the quantity of attached batteries, multiplied by the battery model’s specific max charge rating. For example, a 12K-P inverter would be set to the lessor of the inverter’s max charge rate of 185 A, or 190 A for two AES RACKMOUNT 48-48-5120 batteries rated at 95 A max charge each.⁽¹⁾

For a three-phase system: set to the lessor of the max charge value for the master inverter, or the quantity of attached batteries, multiplied by the battery model’s max charge rating, divided by the number of inverters. For example, the master 12K-P would be set to the lessor of the inverter’s max charge rate of 185 A, or 126 A, for four AES RACKMOUNT 48-48-5120 batteries rated at 95 A max charge each (380 A divided by three inverters).

NOTE: Each HELIOS ESS battery is rated at a 200 A charge rate, but when connected in parallel, the maximum current is limited by internal busbars. For the recommended maximum current for paralleled HELIOS ESS, refer to the HELIOS Manual, Minimum Specifications for Battery Systems.

Max A Discharge

For a single inverter: set to the lesser of the inverter’s max discharge capacity, or the quantity of attached batteries, multiplied by the battery model’s specific max discharge rating. For example, a 12K-P inverter would be set to the lessor of the inverter’s max discharge rate of 185 A, or 190 A for two AES RACKMOUNT 48-48-5120 batteries rated at 95 A max charge each.⁽¹⁾

For a three-phase system: set to the lessor of the max discharge value for the master inverter, or the quantity of attached batteries multiplied by the battery model’s max discharge rating, divided by the number of inverters. For example, the master 12K-P would be set to the lessor of the inverter’s max discharge rate of 185 A, or 126 A, for a battery bank of four AES RACKMOUNT 48-48-5120 batteries rated at 95 A max discharge each (380 A divided by three inverters).

NOTE: Each HELIOS ESS battery is rated at a 200 A discharge rate, but when connected in parallel, the maximum current is limited by internal busbars. For the recommended maximum current for paralleled HELIOS ESS, refer to the HELIOS Manual, Minimum Specifications for Battery Systems.

TEMPCO

Set to 0 mv/C/Cell. ⁽²⁾

Use Batt V Charged

Enable

Use Batt % Charged

Disable

No Battery

Disable

BMS Lithium Batt

Disable (Displays 00 value) ⁽³⁾

Activate Battery

Enable

⁽¹⁾ The recommended value for Max A Charge is 75% of the rated maximum charge current for the battery.

⁽²⁾ Discover Lithium batteries do not require temperature compensation. Setting TEMPCP to O mv/C/Cell will disable inverter-charger controlled temperature compensation.

⁽³⁾ Setting the BMS Lithium Batt parameter to Disable confirms open-loop operation. Setting the parameter to Enable confirms closed-loop operation.

The values and parameters used are for an assumed operating temperature of 25 °C (77 °F).

Gen Charge

Enable if charging from a generator is desired. ⁽¹⁾

Note: The Gen Input Breaker must be connected to the output of an AC generator for this work.

Grid Charge

Enable if charging from the grid is desired. ⁽²⁾

Note: The Grid Input Breaker must be connected to input from the grid for this to work.

StartV

Set the value to the desired battery voltage that will trigger battery charging. The absolute minimum is 48 V.

Start%

Unavailable (Grey) in an open-loop configuration.

A

Set to the same Amp value that was used for Max A Charge. ⁽³⁾

Float V

Set to 53.6 V

Absorption V

Set to 55.2 V ⁽⁴⁾

Equalization V

55.2 V ⁽⁵⁾

30 days

0.0 hours ⁽⁵⁾

Gen Exercise Cycle Day & Cycle

Refer to Solar-Ark documentation.

Gen Force

Refer to Solar-Ark documentation.

⁽¹⁾ Left column options are for Gen Charge AutoStart values (Reference Sol-Ark documentation for more details on the generator AutoStart function.

⁽²⁾ Right Column options are for Grid Charge values.

⁽³⁾ If need be, this value is used to curtail the maximum current output of the charger.

⁽⁴⁾ Absorption will stop at 2% of the set capacity of the battery bank and move to the float value.

⁽⁵⁾ Lithium batteries MUST not be equalized. Using a value of 55.2 for Equalization V and zero for Hours ensures that the batteries will not be equalized.

The values and parameters used are for an operating temperature of 25 °C (77 °F).

BMS_Err_Stop

Disable

Shutdown

48.0 V ⁽¹⁾

Low Batt

49.5 V ⁽¹⁾

Restart

52.8 V ⁽¹⁾

Batt Empty V

48.0 V

Batt Resistance

Set to: Ten mOhm divided by the number of batteries, plus the mOhm value of resistance for interconnection and homerun cabling. ⁽²⁾

Batt Charge Efficiency

98.0 %

⁽¹⁾ Discharge state-of-charge percentage values are unavailable in an open-loop (voltage-based) configuration.

⁽²⁾ This value should include cable and connection resistance. The formula is provided to assist with the calculation of a general value.

The values and parameters used are for an operating temperature of 25 °C (77 °F).