Disable Excess Generation

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gurdsam
Disable Excess Generation

I'm playing with a grid disconnected application where electricity either comes from PV, battery or generator.
How can I disable excess generation being sold back to the utility?
Thanks in advance,
Bill

Paul Gilman

Dear Bill,

SAM assumes that the system is grid-connected, so it will always send PV generation in excess of the load to the grid. You can remove the effect of that PV-to-grid power on the electricity bill calculation by choosing one of the "Monthly Accounting of Excess Generation" options on the Electricity Rates page that involves a sell rate, and then setting the sell rate to zero.

SAM cannot model a hybrid power system that combines PV, battery, and generator. You can use a model like RETScreen or HOMER for that kind of system.

Best regards,
Paul.

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