Electricity to/from Grid VS Electricity use with system

Hi

Im having trouble understanding what electricity use with system means.

I would hope that electricity to/from grid = electricity use with system. And for most of the months this is correct. Except 3 months. 

Lets focus on March at the attachment. Electricity usage is 1577 wich equals: AC output @ 1134.55 plus Electricity to/from grid @ 442.446. But Electricity use with system is 540.779.

Shouldn't "electricity to/from grid" be equal to "Electricity use with system"? ( as other months)  Where does de 540.779 comes from? 

Hi Fernando,

"Electricity use with system" is the monthly kWh used to calculate the monthly bill and includes any net metering credits that may have been applied. Please see this most for more details:

sam.nrel.gov/forum/forum-general/3126-monthly-grid-to-load-vs-monthly-use-with-system.html?start=6#8696

Best regards,
Paul.