Pete T. in San Jose. Working on a large office building analysis and need to compare PG&E's A-10 TOU versus E-19 TOU schedules. Building pulls about 850kW peak demand. Anyone have Excel models or tools that handle PG&E's complex time periods and seasonal adjustments?
PG&E Time of Use Rate Comparison Tool Recommendations
Kelly B. from Riverside. I built a spreadsheet for SCE rates that might work for PG&E with modifications. The tricky part is PG&E's partial-peak periods and the baseline credits. A-10 is probably better for that demand level since E-19 has higher demand charges above 500kW.
Randy Dawson here. Pete, for that demand level you're definitely looking at E-19 territory. A-10 TOU caps at 499kW so you'd be forced onto E-19 anyway. The rate difference is substantial - E-19 has demand charges around $17.20 per kW in summer peak periods versus A-10's simpler structure. You'll also need to factor in the power factor adjustment and facilities charges. PG&E's website has interval data analysis tools that can model the rate comparison if you have 12 months of usage data. The CPUC requires them to provide bill impact analysis for rate changes.
Clyde N. in Eugene. Pete, watch out for PG&E's distribution upgrade charges on E-19. Had a client get hit with $23,000 in interconnection fees when they crossed the 500kW threshold. Make sure you understand the full tariff impact beyond just energy and demand charges.
Good catch Clyde. Found those charges buried in the Electric Rules and Regulations document. Randy, the interval analysis tool worked perfectly - showing about $3,200 monthly savings on E-19 despite higher demand charges. Thanks for the direction.