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WEBINAR: How Advantageous is PG&E’s Option S, daily demand charge rate tariff, for Energy Storage Projects?


In March of 2021, PG&E finished mandatory transitioning all C&I customers to their new “B” rates, which featured the 4 – 9 pm “on-peak” period. Within this new suite of rates was the new Option S, daily demand charge rate, which was designed to be a storage-friendly rate option for both the B-19 and B-20 rates. Option S marked the first time $/kW/day daily demand charges have been implemented in California.

In this webinar, we review and unpack PG&E’s Option S rate. We recently conducted an extensive analysis that studied how PG&E’s Option S rate compared to the Option R rate for energy storage savings and economics. We presented our summarized findings and quantify exactly how advantageous Option S is for commercial solar + storage projects in PG&E territory.

  • Timeline of Option S implementation 
  • Option S Eligibility Requirements 
  • B-19 Energy vs. Demand Charges
  • Monthy vs daily demand charge breakdown 
  • TOU Demand Charges – Option R vs. S 
  • Capacity Reservation System
  • Option S for energy storage projects analysis in ETB Developer
    1. modeled 10 customer load profiles to understand their influence on savings
  • Using Energy Toolbase’s product suite offering to model your Option S storage projects

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