SolarEdge › Problems
SolarEdge battery won't charge or discharge
Your SolarEdge battery stops charging or discharging, sits at a fixed percentage, or throttles to nothing, and solar goes to the grid instead. 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 |
|---|---|
| Solid red and blinking blue light on the battery | Seen along with a Battery Not Communicating warning in the app or error 3x6B in the log. |
Error codes that go with this problem
| Code | What it means |
|---|---|
| 3x6B, or Battery Not Communicating in the app | Battery Communication Error. The battery has stopped communicating with the inverter. |
What to check first
- Look at what the app shows for the battery: the charge or discharge power, whether the percentage is still updating, and any Battery Not Communicating warning.
- Note whether it started after a power cut, a fuse trip, or a manual power-down and restart.
- If the battery's output drops as it gets hot, or it won't charge in a cold early morning, wait and see whether it resumes once it cools down or warms up. What counts is the battery's own internal temperature, not the outside air.
- Power cycle the whole system and let the inverter re-sync with the battery. Cycling the battery alone has not brought it back.
- If the fuses tripped, use this order: DC off at the inverter, wait 10 minutes, AC off, battery off. Then turn the inverter back on before the battery.
- If the battery is still stuck or not communicating after a full restart, call your installer.
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.