Partner Academy · EcoBSS / FLEX
Fault
3P LV
F25
AC_Active_Batt_Fault
DC back-feed / active storage fault
Academy field checklist (AC_Active_Batt_Fault) — no EcoBSS service-table row for this bit.
Register map
- Family
- Three-phase LV (FLEX 3L)
- Register
- 556
- Bit
- 8
Field checks
- Check energy-storage DC polarity and that back-feed protection / settings match the site topology.
- Confirm storage contactors and BMS allow charge/discharge as configured.
- Contact Inversol if the fault returns after a clean power cycle.
FAQ
What does EcoBSS F25 mean?
DC back-feed / active storage fault
What should I check for EcoBSS F25?
- Check energy-storage DC polarity and that back-feed protection / settings match the site topology.
- Confirm storage contactors and BMS allow charge/discharge as configured.
- Contact Inversol if the fault returns after a clean power cycle.
When should I contact Inversol?
Confirm LV vs HV family on the nameplate, complete the field checks, then contact Inversol with model, SN, family, and a photo if the code returns after a clean power cycle.
Partner lookup from EcoBSS Flex register map V1.2 — not a substitute for the official service manual or live measurements. Always match the inverter family (3P LV / FLEX 3L vs 3P HV).