GROWATT Inverter Configuration (Open Loop)

The GROWATT inverter-charger will need to be manually converted to an open-loop configuration if closed-loop communication cannot be established. Refer to the latest Discover Lithium battery documentation for battery values and the latest GROWATT documentation for details on menu navigation and the setup procedure.

Set the Discover Lithium batteries to ON and set the inverter-charger to ON.
Using the touch screen on the inverter-charger, navigate to Main Screen > Settings > Battery Settings.
Specify the battery settings according to the instructions in the tables that follow.
1. Touch a field to specify its value.
2. Touch the Up and Down arrows to scroll through screens.
Exit and restart the inverter-charger.

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

Battery Settings

Battery Setting - GROWATT Open-Loop Charge Settings

Battery Settings (page 1)
Battery Mode	Select the Use Battery v option for an open-loop system.
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 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 rated at 200 A max charge each. 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.
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 batteries rated at 200 A max discharge each. 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.

NOTE
For more information about configuring the GROWATT inverter-charger, refer to product documentation on their website (growatt.com) or the LYNK II Installation and User Manual (805-0033).