As so as the SUN2000-( 15KTL, 17KTL, 20KTL)-M0 inverter.
1. The inverter normally on-grid for more than 3 minutes.
2. Cut-off the AC switch, then turn off the DC switch. Keep the AC disconnected until successful re-set the password .
3. After all the LED indicators off, turn on the DC switch. Then turn off the DC witch again when all the 3 indicators blinking.
4. Repeat STEP 3.
5. Turn on the DC switch once again, now the password re-set as the initial [Changeme],