Had a breakthrough on a PSE&G case this week. We pulled 48 months of billing history and found the fuel adjustment error started in 2018. The meter nameplate shows 200:5 but the billing system has 100:5.
NIPSCO Rate I-5 misapplication — $21,300/month impact
Had the exact same problem with Rocky Mountain Power last year. Took about 36 months to resolve but got full refund.
Good thread. I want to emphasize what Vince S said about demand charges. This comes up frequently and the correct approach is to always verify against the published tariff, never assume the bill is right.