Per page 23 of the user manual, If a power failure occurs, the surface burners can still be lit manually.
**NOTE**
Use extreme caution when manually lighting a surface burner.
1. Hold a long gas grill lighter to the surface burner you want to light.
2. Push in and turn the control knob for that burner to the LITE position.
3. After the burner has lit, set the control knob and the burner to the desired
setting. ^Lo