Hard lesson learned on a recent TVA audit here in Huntsville. Called the utility customer service to clarify a confusing clause in Schedule GSA about demand ratchets. The rep gave me completely wrong information that cost my client $14,000 in missed savings. Turns out the rep was looking at an outdated tariff from 2012. I should have known better than to rely on phone support for technical tariff interpretation. Now I only work directly with rate analysts or regulatory affairs staff. Customer service reps just don't have the training for complex billing questions.
Why I stopped trusting utility customer service for tariff questions
Albert, you're absolutely right about customer service limitations. Idaho Power reps here in Boise gave me wrong info about Schedule 19 (Large Power Service) coincident peak billing. They told me peaks were calculated monthly when it's actually annual. Caused a huge mess with a client's budget projections. I learned to always ask for written confirmation and the specific tariff section reference.
This is why I always go straight to the regulatory department now. PPL here in Pennsylvania has great rate analysts who actually know their tariffs inside and out. Customer service is trained for basic billing questions, not complex auditing scenarios. Got burned once on Schedule LP-5 ratchet calculations - never again. Always get technical answers in writing with tariff citations.
AEP Texas reps told me the wrong effective date for a rate change that affected my client's historical analysis. Cost me three days of rework when I discovered the error. Now I verify everything against the official tariff documents filed with the PUC. Phone support is fine for account questions but terrible for technical tariff interpretation.
Ameren Missouri customer service once told me that Schedule LPS didn't have a minimum bill provision. Spent hours trying to figure out why my calculations didn't match their bills. Finally found the minimum bill clause buried in Section 6. These reps handle hundreds of calls daily - they can't be expected to know every tariff detail. Lesson learned: trust but verify everything.
Duke Energy Ohio customer service told me about a 'fuel adjustment' that doesn't exist on commercial accounts under Schedule DP. Wasted half a day chasing phantom charges. I've started building relationships with the utility's regulatory affairs team - they're the ones who actually understand the tariffs. Much better than playing telephone with customer service representatives who are just reading from scripts.