SolarEdge ESS Systems
12 fault codes documented
Battery discharging then charged every night — Potential Sustain protection or SOC setting
The battery undergoes a cycle of discharging and then recharging each night. This behavior might be related to the system's Sustain protection settings or the minimum State of Charge (SOC) configuration.
ESS Relay test Pending — Feed-in disabled until test completes
The system is in the process of performing a required relay test before it can begin feeding power from the battery or solar to loads or the grid. During this test, the system needs to run in inverter mode.
Input current-limit setting — Loads must be on AC-out for limiter to work
The Input current-limit setting in VEConfigure functions as a threshold for AC current at the AC-in of the Multi/Quattro. For this limiter to be effective, all loads should be installed on the AC-out of the unit.
Loads powered by grid, not battery or solar — Check battery SOC, limits, and relay test
Your loads are being powered by the grid when you expect them to be powered by the battery or solar. This can happen for several reasons related to system configuration and battery status.
Low battery warning cannot be disabled — Red blinking LED is inherent
The red blinking LED that warns of a low battery cannot be disabled in off-grid or backup systems where it's essential. However, on-screen or email notifications can often be managed.
Multi/Quattro and ESS Assistant configuration — Ensure correct settings in VEConfigure
Proper configuration of the Multi/Quattro and ESS Assistant in VEConfigure is crucial for system operation. Incorrect settings can lead to unexpected behavior, such as the system not supplying battery energy to AC loads when the grid is connected.
No feed-in, AC Input current fluctuates wildly — Normal operation due to X-capacitors
The AC input current may appear to fluctuate significantly, even becoming negative, when the system is in optimize mode with no feed-in. This is normal and caused by the X-capacitors in the Multi.
Red LED blinking — Low battery warning
The red LED on the inverter/charger is blinking, indicating a low battery condition. This warning can occur in off-grid or backup systems, or when the battery is nearly depleted in self-consumption optimization systems.
Solid red LED — System error or shutdown
A solid red LED on the inverter/charger indicates a more critical system error or that the unit has shut down.
System switches off in overload — Active Loss of Mains (LOM) detection
The system shuts down during an overload when connected to the grid. This is often caused by the active Loss of Mains (LOM) detection feature, which is sensitive to the impedance of the AC connection.
Unit refuses to discharge battery — Check rocker switch and system settings
The system is not discharging the battery as expected. This is often due to a specific setting on the unit itself or within the system configuration.
VRM data mismatch with billing — Differences in energy accounting methods
There can be a discrepancy between the energy data shown on the VRM Portal and your utility bill. This is common in systems without a dedicated energy meter (like EM24) or those using an ET340 meter, due to different ways of calculating imported and exported energy.