EG4 › Problems
EG4 battery not seen or misread by a Victron, Schneider, Sol-Ark or Growatt
A Victron, Schneider, Sol-Ark or Growatt inverter or charge controller can't see an EG4 battery, or reads its charge, charge limit or current wrong. This page covers what the lights and codes mean, what to check first, and the causes behind it.
What the lights mean
| What you see | What it means |
|---|---|
| Batt-Comm port light blinking orange fast on an LL V2 24V | Seen with Warning 4E20 after a third-party charge controller overcharged the battery above 28 V. |
Error codes that go with this problem
| Code | What it means |
|---|---|
| F76 on a Schneider XW Pro, sometimes with F49 | A charge-controller fault raised when the LifePower4 rack sends its stop-charge command for cell over-voltage, which the Schneider treats as a hard fault. |
| High Cell Voltage warning | A warning that one cell's voltage is high at full charge, around 3.61 V, seen on an LL 24V pair with a Victron Cerbo GX. |
| Warning 4E20 with Error Code 0111 in BMS Tools | Battery warning and error shown after a third-party charge controller overcharged an LL V2 24V above 28 V. The battery was left in Standby with its health (SOH) reading 0. |
What to check first
- Write down any fault code on the other brand's inverter or charge controller and when it appears, for example F76 on a Schneider XW Pro whenever the bank nears 100%.
- On a Victron system, look for an EG4 label in the lower-left corner of the Victron Connect app or the GX Touch 50. It shows the Cerbo GX sees the batteries.
- On a Victron GX, open the battery Parameters screen and note the charge-current limit and the discharge-current limit.
- On a Sol-Ark, note whether the screen says it is searching for RS485, and whether the li-bat info screen shows wrong or missing details such as nominal capacity.
- On a Growatt, watch whether the battery's charge reading stays frozen at one value overnight while solar and load keep changing.
The causes and the fixes
Partners see the causes behind this problem, most common first, the checks that tell them apart, and the fix for each, with part numbers and recent prices when a part is involved.