Working on a complex audit for a manufacturing facility here in Jacksonville and discovered JEA has been billing them incorrectly for transformer-related charges. The facility owns their primary transformer but JEA was charging them a monthly transformer rental fee plus maintenance costs. Turns out this had been going on for three years - $847 per month in erroneous charges totaling over $30K. The billing department apparently never updated their system when ownership transferred. How do you all handle transformer ownership verification? This seems like an area ripe for errors.
Transformer ownership confusion - who pays for what?
Marcus, transformer ownership is definitely tricky. PG&E here in California has different billing codes depending on who owns what - primary transformer, secondary transformer, metering equipment, etc. I always request a detailed service diagram showing ownership boundaries. Found a case where the client was paying for utility-owned transformer maintenance when they actually owned the equipment. $18K recovery over two years.
Dominion Energy in Virginia has similar issues. Large industrial customers often have mixed ownership - they own some equipment, utility owns other parts. The billing system doesn't always reflect the actual ownership arrangement. I now include equipment ownership verification as a standard audit step. Found $12K in incorrect transformer charges just last month. The key is getting the original interconnection agreement and any subsequent modifications.
PNM here in New Mexico has a particularly confusing setup. Some customers pay a facilities charge that includes transformer rental, others pay separately based on kVA rating. I had one client getting double-charged because they were on the wrong billing code. The transformer was utility-owned but they were being billed as if they owned it AND paying the facilities charge that included transformer costs. $600/month error that had been running for 18 months.
Rosa, that double-charging scenario sounds familiar. JEA has customers on different rate schedules with different transformer cost structures. Some pay monthly rental fees, others pay upfront installation costs, others own their own equipment. The billing department doesn't always coordinate between departments when ownership changes or service gets modified. I'm finding that site visits are essential to verify what's actually installed versus what's being billed.
Marcus makes a good point about site visits. PG&E's records don't always match reality, especially for older installations. I found a client being charged for a 500 kVA transformer when they actually had a 300 kVA unit installed. The paperwork showed the larger transformer from an upgrade that was planned but never completed. $200/month difference over 4 years. Photos and nameplate verification are now standard practice for me.
Pete's right about documentation. I always take photos of nameplate data and compare it to billing records. Found several cases where transformer size in the billing system didn't match the actual installation. One client in Richmond was being charged for a 750 kVA transformer but the installed unit was only 500 kVA. Dominion had updated their system based on an engineering study for a planned expansion that never happened. $145/month for three years.
This thread is making me realize how common transformer billing errors are. PNM probably has dozens of accounts with similar issues. The challenge is that most clients don't understand their electrical setup well enough to question transformer charges. They just see "Transformer Rental - $847.50" and assume it's correct. That's where we add value by actually verifying the details. Great discussion everyone.
Excellent thread. MLGW here in Memphis has similar transformer ownership confusion, especially for older industrial accounts where ownership may have changed hands over the years. I've started including electrical diagram review as part of my standard audit process. It takes extra time but transformer errors tend to be large dollar amounts that justify the effort. Marcus, nice catch on that JEA billing error - $30K is a substantial recovery from what should be routine billing verification.