Been auditing warehouse accounts for 5 years and never seen this before. We pulled 24 months of billing history and found the rate classification error started in 2020. I''ve calculated total overcharges at approximately $2,400/month going back 5 years.
Holiday greetings from Montgomery!
Dan, what was the client''s reaction when you showed them the $23,000 overcharge?
Had the exact same problem with Entergy last year. Took about 24 months to resolve but got full refund.
Pro tip: ask for the billing determinant detail, not just the bill summary. The devil''s in the details with Puget Sound Energy.