NET METERING - NET BILLING

Hello,
i am working on a project with pv-battery storage residential  with the option of net metering and the option with net billing. At net billing option, in time series graphs i choose to see :  'electricity to battery from system' and 'electricity to load from battery' but it saw me zero. Why? 

Hello,

The metering and billing options "net metering" and "net billing" on the Electricity Rates input page determine how SAM treats excess generation for the monthly electricity bill calculation.

The battery charge and discharge times are determined in separate calculations based on the dispatch options you choose on the Battery Storage input page.

Best regards,
Paul.