Found a doozy at a food processing plant in Georgia Power territory. Plant was billed with 300:5 CT ratio (multiplier 60) but actual CTs are 400:5 (multiplier 80). Been wrong for 3.5 years! Usage is massive - around 2.2 million kWh/month. Anyone dealt with Georgia Power on CT ratio corrections? What's their policy on retroactive billing adjustments?
CT Ratio Error - 300:5 vs 400:5 Multiplier
Pete - Holy cow, that's a huge error. Georgia Power usually limits retroactive adjustments to 24 months unless you can prove utility negligence. With CT ratio errors they installed, you might have a good case for the full 3.5 years. Get ready for a fight though - that's going to be serious money.
Sarah's right about the 24-month limit, but CT ratio errors are different. Had a similar case with a paper mill - Georgia Power ended up going back 4 years because it was their metering equipment. Document when the CTs were installed and who did the initial setup. That's your smoking gun.
Thanks both. Looking at roughly $180K in underbilling based on the multiplier difference. Found the original installation docs from 2011 - utility contractor installed the wrong CTs. This is going to be interesting. Will update once I hear back from their commercial department.
Pete, this is exactly why we always recommend annual metering verification for large industrial accounts. CT ratio errors are more common than people think, especially when there's been service upgrades or meter changes. Document everything and don't let them limit the lookback period - this was clearly their error. Keep us posted on the outcome.