Allow BESS to Export

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TODO:

• Things to consider before implementing:

  • Evaluate policies and determine whether BESS export is typically compensated through net metering or net billing programs.
  • If compensated through net metering, assess whether the BESS capacity should be included in the net_metering_limit_kw.
  • Consider adding other frameworks outside of net metering or net billing, in which the BESS can export, potentially not receive any NEM or NB compensation, and receive a per kWh compensation during defined periods (similar, but different from, CPs)

• index dvStorageToGrid on metering type, following the logic of tech export bins (add "p.StorageSalesTiers" or "p.s.electric_tariff.export_bins"? )

• Add BESS inputs for can_net_meter, etc.

• Determine whether to use dvs for total BESS discharge & BESStoGrid vs. BESStoLoad & BESStoGrid

• If choosing the latter, rename dvDischargeFromStorage to indicate it's just discharge to load

• Review and update emissions calculations to account for BESS export

• Incorporate dvStorageToGrid into load balancing constraints