Sunsynk Inverter Configuration (Open Loop)

Depending on your system and particular use case, there may be other settings that require configuration. Refer to the inverter manual for information on these settings.

If using multiple inverter-chargers, configure SUNSYNK inverter-chargers to operate in parallel before setting the parameters for battery operation.

Batt type

Select the AGM V option.

Activate

Select this check box.

Batt Capacity

Set to the number of Discover Lithium batteries x Ah capacity of each. For example, set to 628 Ah (2 x 314 Ah) for two HELIOS ESS 52-48-16000 batteries.

Charge Amps

For a single inverter-charger, set to the lesser of the inverter-charger’s maximum charge rate or the quantity of attached batteries multiplied by the battery’s maximum charge rating.

For example:

Single phase system with 8K-SG05LP1 inverter-charger and two HELIOS ESS 52-48-16000 batteries:

• Set the 8K-SG05LP1 inverter-charger to the lesser of the inverter-charger’s maximum charge rate of 190 A, or 380 A for two HELIOS ESS 52-48-16000 batteries that are each rated at a maximum charge rating of 200 A. ⁽¹⁾
  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 table in the Minimum Specifications for Battery Systems topic.

Three-phase system with three 8K-SG04LP3 inverter-chargers and two HELIOS ESS 52-48-16000 batteries:

• Set to the lesser value between the master inverter-charger’s maximum charge rate and the quantity of attached batteries multiplied by the battery’s maximum charge rate divided by the number of inverter-chargers. For example, set the 8K-SG04LP3 inverter-charger to the lesser of the inverter-charger’s maximum charge rate of 190 A, or 133 A for two HELIOS ESS 52-48-16000 batteries that are each rated at a maximum charge rate of 200 A and then divided by three inverter chargers (2 x 200 A ÷ 3 = 133.33 A).

Discharge Amps

For a single inverter-charger, set to the lesser of the inverter-charger’s maximum discharge rate or the quantity of attached batteries multiplied by the battery’s maximum discharge rating.
For example, set the 8K-SG05LP1 inverter-charger to the lesser of the inverter-charger’s maximum discharge rate of 190 A, or 380 A for two HELIOS ESS 52-48-16000 batteries that are each rated at a maximum charge rating of 200 A.

• 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 table in the Minimum Specifications for Battery Systems topic.

For a three-phase system with three inverter-chargers, set to the lesser value between the master inverter-charger’s maximum discharge rate or the quantity of attached batteries multiplied by the battery’s maximum discharge rate divided by the number of inverter-chargers. For example, set the 8K-SG04LP3 inverter-charger to the lesser of the inverter-charger’s maximum discharge rate of 190 A, or 133 A for two HELIOS ESS 52-48-16000 batteries that are each rated at a maximum discharge rate of 200 A and then divided by 3 inverters (2 x 200 A ÷ 3 = 133.33 A).

TEMPCO

Set to 0 mv/C/Cell. ⁽²⁾

Float V

Absorption V

Equalization V

Set the suggested voltage values defined in the associated battery manual.

Discover Lithium batteries must not be equalized. Setting zero hours ensures the batteries will not be equalized.

Shut Down

Low Batt

Restart

48 V

50 V

52 V

For more information about configuring the Sunsynk inverter-charger, refer to product documentation on the Sunsynk website (sunsynk.org) or the LYNK II Installation and User Manual (805-0033).