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Topic starter
We are aware of an issue where a W28 overload fault occurs when the battery reaches 100% SOC on firmware version 0304 for the 12000XP. Our team is actively working to resolve this and release a permanent fix as soon as possible.
In the meantime, a temporary solution is to change the battery type to lead-acid and limit the charging voltage:
- 55V for 16-cell batteries
- 52.5V for 15-cell batteries
We appreciate your patience and understanding as we work to address this issue promptly. Stay tuned for updates!
Posted : December 17, 2024 4:03 pm
Topic starter
Firmware version EG4_ceaa-0405 for the 12000XP was released this morning, addressing the false W28. If you're experiencing this issue, please update your 12000XP to the latest firmware.
Here is the changelog I received:
ceaa-0405
Based on ceaa-0304
- Improved the W028 issue in off-grid and paralleled systems
- Improved the W028 issue in off-grid and no battery systems
Posted : December 19, 2024 3:59 pm
@jared, i had no issues with my inverter before but just to stay up to date decided to update my firmware to the 0405 and now im experiencing w028 problema when its suppose to go onto bypass more. Is there any way to go back to previous?
Posted : April 30, 2025 1:17 am
@eareyes20 Can you share your inverter's serial number or station name so we can look into this issue for you?
Posted : May 1, 2025 3:06 pm
