Six months into trying to get Duke Energy Carolina to approve a submetering installation at a 72-unit complex in Charlotte. The property has been master-metered on Schedule RES for years, paying about $4,800/month and only recovering 55% from tenants. Duke keeps asking for additional documentation and engineering studies. Latest request is for load flow analysis and fault current calculations. Has anyone successfully navigated Duke's approval process recently? This is getting ridiculous and costing my client a fortune in consultant fees.
Duke Energy submetering approval nightmares in Charlotte
David, I feel your pain. Duke Energy Georgia put us through similar hoops on a 96-unit complex in Marietta last year. The key was getting their engineering department involved early and having a licensed electrical engineer stamp all the submittals. It took 8 months total, but we finally got approval. The load flow analysis requirement is new - they're being extra cautious after some submetering installations caused voltage issues on their distribution system.
Randy's right about the power quality issues. We had a submetering project in Portland with PGE that created harmonics problems affecting neighboring businesses. The utility made us install expensive filtering equipment. David, have you considered whether individual metering might be more cost-effective than fighting the submetering approval? Sometimes the path of least resistance is the right one.
Individual metering would require major electrical panel upgrades - we're looking at $85,000+ vs $35,000 for submetering. The property owner is committed to the submetering route. I've found an electrical engineer who's worked with Duke on similar projects before. Hopefully that speeds things up. The consultant fees are already at $12,000 and climbing.
In Washington state, Avista requires pre-approval meetings for any submetering over 40 units. Sounds like Duke should have a similar process. David, try requesting a face-to-face meeting with their engineering manager. Sometimes these approval bottlenecks get cleared up quickly when you can explain the project in person rather than through endless paper submissions.
Eddie makes a great point about face-to-face meetings. When we were stuck on our Marietta project, I finally drove to Duke's engineering office and sat down with the project manager. We identified three specific technical concerns that weren't clear from their written comments. Once those were addressed, approval came through in two weeks. Don't underestimate the power of personal relationships with utility engineers.
Update: took Greg's advice and scheduled a meeting with Duke's engineering team next week. They agreed to review our preliminary designs in person before we submit the final application. Hopefully this breaks the logjam. The property owner is getting antsy - they're losing about $2,100/month on the current billing arrangement.
Great news - the face-to-face meeting worked! Duke approved the submetering design with only minor modifications. Installation starts next month and should be completed by summer. Total approval process took 7 months, but we're finally moving forward. Thanks to everyone for the advice, especially about getting the engineering team involved directly.
Congratulations David! That's a huge win. Would you mind sharing what the minor modifications were? I've got a similar Duke project coming up and any insights would be helpful. Also, what was the final installed cost per unit for the submetering system?
David, excellent outcome! I'm dealing with a similar situation in Knoxville with TVA. The face-to-face approach seems to be the key with utilities these days. Email and phone calls just get lost in the bureaucracy, but sitting across from an engineer and walking through the technical details makes all the difference. Glad persistence paid off for you and your client.
We've been seeing utilities crack down on submetering approvals across the board. The issue is that poorly designed installations can cause power quality problems that affect other customers. Duke's requirements might seem excessive, but they're protecting their system reliability. Make sure your electrical consultant has experience with Duke's specific technical standards - that can save months of back-and-forth revisions.