FoxESS
DCI Fault
DC Injection Fault
The inverter is injecting more DC current into the AC grid than the permitted limit (typically 5–20 mA depending on standard).
Common causes
Internal inverter faultFaulty AC transformer or coupling components
What to check
STEP 1
Power cycle the inverter. Allow a full self-test cycle
STEP 2
Check firmware is up to date in Fox ESS app
Escalate if
Fault returns after power cycle — hardware fault, escalate to Fox ESS UK support
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