Been auditing church accounts for 2 years and never seen this before. Compared the interval data against the bill and found a 15% variance in peak demand. The demand ratchet is being applied at 85% instead of the tariff''s 70%.
National Grid Rate GST misapplication — $31,500/month impact
Had the exact same problem with Dominion Energy last year. Took about 24 months to resolve but got full refund.
Solid analysis. One thing I''d add is to verify the power factor minimum 0.95 against the original service application.
Cheryl B, you should also check the demand charges while you''re at it. These errors tend to cluster.