GROWATT Inverter Configuration (Closed Loop Without LYNK II)

• If there is a break in communication between the HELIOS ESS battery and inverter-charger for more than ten seconds, the inverter-charger will safely stop operation. The GROWATT inverter-charger will check every few minutes and resume closed-loop operation if communication is re-established.

• If communication cannot be reestablished and you need to resume operation, you may need to manually convert the GROWATT inverter to an open-loop configuration. For instructions on configuring open loop, refer to GROWATT Inverter Configuration (Open Loop).

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

Batt Mode

Select the Lithium option to use the battery BMS.

Refer to the electrical specifications in the battery manual to set the battery, charge, and discharge parameters.

Battery Capacity

Set to the number of Discover Lithium batteries x Ah capacity of each.

For example, set to 628 Ah for two HELIOS ESS 52-48-16000 batteries, each rated at 314 Ah capacity.

Max Charge

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, the SPH 10000TL-HU-US inverter would be set to the lessor of the inverter’s max charge rate of 200 A, or 380 A for two HELIOS ESS batteries.

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 Minimum Specifications for Battery Systems.

Max Discharge

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, the SPH 10000TL-HU-US inverter would be set to the lessor of the inverter’s max discharge rate of 200 A, or 380 A for two HELIOS ESS 52-48-16000 batteries.

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 Minimum Specifications for Battery Systems.

Lithium Mode

Set this value to 00 (Pylon).

LBCO

Specify the battery SOC at which to stop discharge (low battery cut-off, LBCO), and the SOC at which to allow discharge again (low battery cut-in, LBCI).

LBCO Alarm

LBCI