Hi everyone, new member here. I'm working on a PG&E account with Schedule E-19 TOU and found what looks like demand billing errors going back 14 months. The facility has a 750kW transformer but they're being billed on peak demand readings of 920kW consistently. This seems impossible given the infrastructure. Has anyone dealt with similar transformer capacity vs. billed demand issues with PG&E? The overcharges are looking like $23K so far.
PG&E Demand Billing Error - Schedule E-19 TOU
Welcome to AAUBA! That definitely sounds like a metering or billing system error. I've seen PG&E mix up CT ratios before - check if they have the correct current transformer multiplier in their system. Also verify the actual transformer nameplate rating vs what's in their records. Document everything with photos.
Great catch on that demand reading! John's advice about CT ratios is spot on - that's often the culprit. Also welcome to our community! For PG&E E-19 cases, make sure you're looking at both the on-peak and part-peak demand charges. They sometimes have different multiplier errors. I'd also recommend requesting the interval data going back as far as possible. Keep us posted on how this develops - these transformer capacity cases can be very rewarding to resolve.