Solis
E033
Relay Fault
Internal relay check failed. Relay may be stuck open or closed.
Common causes
Relay wearSurge eventInternal fault
What to check
STEP 1
Power cycle inverter — AC OFF, DC OFF, wait 5 minutes, restore. Monitor for recurrence
STEP 2
Check for signs of surge damage — check SPD on AC and DC circuits if fitted
Escalate if
Fault persists after power cycle — relay hardware fault, contact Solis support
Need full interactive diagnosis?
Faultpath walks you through decision trees, fault codes, and commissioning — built for solar & battery engineers.
Open Faultpath
More Solis fault codes