Do I must connect CT or meter for X1-Hybrid-LV?

Yes, meter or CT must be connected to the inverter; otherwise, the inverter will shut down and trigger a "meter failure" alarm. Smart meters must be authorized by us, third-party, or other companies. Unauthorized meters may be incompatible with the inverter. we will not be responsible for the impact caused by the use of other appliances. About how to connect meter or ct, please refer to the user manual for more details.