Configuring a Lithium Battery

Before proceeding, ensure that your batteries are of the Sunsynk brand and that they are wired according to the specifications in this document. If you have a Lithium battery that is not Sunsynk, please note that the steps outlined below will vary by manufacturer.

1. Make sure "Lithium" is selected. If no battery is connected, choose "No Batt".
2. Determine the battery capacity for each battery (5.12 batteries have 100 Ah and 5.32 batteries have 104 Ah), multiply this by the total number of batteries, and enter this value in the Batt Capacity tab.
3. As a general guideline, a single 5 kW battery would typically have a charge/discharge of 50 A, while two or more would have a charge/discharge of 40 A per battery (2 = 80 A, 3 = 120 A). Always keep in mind the limits of each inverter, which are noted here.

Configuring Battery Charge

1. Activate Grid Charge, allowing you to choose when to charge the batteries.
2. Activate Grid Signal, which will enable the system to accept grid charging.
3. The current that the inverter will use to charge the batteries from the grid can be changed by modifying the right box on the "Amps" row.

Battery Discharge Settings

1. Shutdown should correspond to the battery's DoD.
2. Low Batt should be set 5% above Shutdown (recommended), or it can match the Shutdown value.
3. Restart should be set 10% above Low Batt.

Programming Charge & Discharge Times

1. By default, the SOC % will be set to 80%, so for the batteries to discharge, we recommend adjusting all SOC to the Low Battery value found on the battery shutdown page.
2. Ensure the User Timer is checked; if it is not, the batteries will be continuously charged from the grid unless the grid supply drops, at which point they will discharge to the shutdown value.
3. Here is a link to the system mode settings guide.

Configuring the Inverter for GRID & LOAD Port

1. Zero Export: Check this box to prevent exporting power back to the grid (the CT coil will recognize power returning to the grid and will decrease the inverter’s output solely to meet local load demands).
2. Solar Export: Check this box if you intend to export your solar power back to the grid.
3. Limit to Load Only: Check this box if you wish to supply power only to the inverter's load side.
4. Grid Trickle Feed: This refers to the amount of power flowing from the grid to the inverter. Set this value to '20 - 100W' to instruct the inverter to consistently draw this set amount of power from the grid and minimize tripping sensitive pre-paid electricity meters in case 'Reverse Power Detection' occurs.
5. Inverter Power Limiter: This regulates the maximum total output power to both the 'Load' and 'Grid' ports combined. It defaults to Low if an 'over-current' fault is detected.
6. Priority Load: Check this box if you want the solar panels to prioritize supplying power to the 'Load'. If unchecked, the solar will direct power towards charging the batteries.

If nothing is checked: This setting enables the hybrid inverter to return any surplus power generated by the solar panels back to the grid. If the Use Time is active, battery energy can also be transmitted to the grid. PV energy will first be utilized for powering the load and charging the battery; any surplus energy will subsequently flow to the grid. The prioritization of power sources for the load is as follows:

1. Solar Panels

2. Grid

3. Batteries (until the programmable % discharge level is attained)

Zero Export + Limit To Load Only: The hybrid inverter will exclusively provide power to the connected backup load. It will not supply power to the home load or return power to the grid. The built-in CT will detect any power flowing back to the grid and will reduce the inverter’s output to accommodate only the local load and charge the battery.

Zero Export: The hybrid inverter will supply power to both the backup load and the connected home load. If power from the PV and batteries is inadequate, it will draw supplementary energy from the grid. The inverter will not return power to the grid. In this configuration, a CT is necessary. The external CT will detect any power flowing back to the grid and will adjust the inverter’s output to provide power only to the local load, charge the battery, and power the home load.

WITH THIS BASIC GUIDE, THE INVERTER SHOULD BEGIN DISPLAYING READINGS FOR LOAD, PV, GRID, AND BATTERIES ON THE POWER FLOW SCREEN. IF IT DOES NOT, PLEASE CONTACT TECHNICAL SUPPORT FOR FURTHER ASSISTANCE.