What we buy
Ranges we buy on this page
Transformer Buyers NC buys used, surplus, failed and obsolete step-up transformers across North Carolina. This page covers generator and inverter units that raise voltage to collection or transmission levels, including the records, inspection and removal work involved.
| Phase | kVA | Voltage | Fluid |
|---|---|---|---|
| 3-phase | 5 - 100 MVA | 230 kV | Liquid-filled |
Who we buy from
Six kinds of seller
- Recyclers
- Electrical contractors
- Equipment dealers
- End users
- Demo contractors
- Distributors
Fast offers
A written offer the same business day, based on your photographs.
Dedicated logistics
Our own crew, trailer and crane, not a brokered haul.
No broker fees
One buyer from first call to cleared pad, with nothing skimmed.
How it works
Six steps from photograph to payment
- 01
Take pictures
Photograph the nameplate, the inside of the cabinet and the tank from both ends. Four frames on a phone are enough to price most units.
- 02
Send them to us
Email or text the photographs with the site address and whether the unit is still energised. We reply the same business day with questions or a number.
- 03
Review the offer
The offer names the unit, the site, the price and the pickup window. It is written, dated and good for thirty days unless the unit changes hands.
- 04
We schedule freight
A crew, a trailer and a crane if the pad needs one. You get the date and the arrival window, and the site does not have to close for it.
- 05
Testing on arrival
Winding resistance, insulation resistance and a turns ratio check, plus oil analysis where the unit is liquid-filled. Results travel with the unit.
- 06
Get paid
Payment is released against the signed bill of sale and the scale ticket, by check or ACH, with the paperwork copy left on site.
What we handle
The parts sellers dread
Rigging
Crane, skates and a route survey for anything that will not roll onto a trailer.
Oil containment
Pans, absorbent and a spill plan before a drain plug is touched.
Bill of sale
A document that clears a lien, a lease or a bankruptcy file, not a handwritten note.
PCB paperwork
Testing and manifesting for pre-1979 oil, handled before the unit moves.
On the ground
Step-Up Transformers explained
A step-up transformer raises voltage from a generator or inverter to a collection or transmission level. At a solar site, that can mean taking inverter output into a medium-voltage collector circuit.
At a generating station, the high-voltage winding connects toward the switchyard rather than a building load.
The voltage ratio alone does not describe the unit. A generator step-up transformer may have a delta low-voltage winding and a grounded-wye high-voltage winding.
Inverter applications also require attention to grounding, harmonics and the winding configuration specified in the project drawings and original transformer test report.
Local reality
The North Carolina install base
North Carolina step-up units appear at generating stations, solar farms, wind projects and battery storage sites. Eastern North Carolina solar projects commonly place inverter transformers along collector circuits.
Larger station units sit near generator buildings or switchyards, with radiators, surge arresters and substantial high-voltage clearances around the tank.
Battery storage transformers need to be understood in both operating directions: charging draws power from the grid, while discharge sends inverter output back through the same connection.
For wind projects, identify whether the unit served an individual turbine or the project substation before describing its original duty.
Around the site
The inspection that decides value
Inspection starts with the nameplate ratio, winding configuration, cooling designation and the generator or inverter the transformer matched. A photograph of the plate should show every tap position.
The single-line diagram helps establish whether the unit connected directly to generation equipment or served a collector substation instead.
Test records give those nameplate details context. Turns-ratio results, winding resistance, insulation measurements and excitation-current results can help identify an open winding, a connection error or damage after a fault.
Record the tap position during testing; otherwise, a ratio result can be misread against the nominal nameplate voltages.
Where it sits
Fluid condition and PCB status
For liquid-filled step-up units, identify the insulating fluid before planning removal. Mineral oil and ester fluids require different documentation and handling decisions.
A recent fluid report should identify the sampled tank, sample date and laboratory results rather than relying on a project-wide statement covering several inverter transformer pads.
PCB status needs supporting records, not an assumption based on a solar project's commissioning date. Preserve laboratory reports and fluid replacement history.
Dissolved gas results can indicate arcing or overheating, while moisture and dielectric breakdown results help explain insulation condition after a generator fault or extended outdoor storage.
On the ground
Getting it off the pad
Removal begins only after the owner establishes isolation from the generator, inverter and grid connections. Qualified crews must address backfeed, stored energy and grounding before disconnecting bushings or cable elbows.
At battery storage sites, the isolation plan must cover both the power conversion equipment and the collector circuit.
The lift plan needs confirmed weight, approved lifting points and access measurements from the pad to the loading position. Large generator units may require radiator removal and a lowboy.
Solar sites can present narrow gravel lanes, buried collector cables and crane outrigger locations that need review before mobilization.
Local reality
What a buyer weighs up
Step-up units are usually young and documented, especially when released from a canceled or revised renewable-energy project. Their usefulness tracks the project they came from: inverter voltage, collector voltage, grounding method and protection scheme determine how closely the transformer matches another application.
Age alone does not establish condition.
A complete assessment separates transformer damage from failure elsewhere in the generating system. An inverter trip does not prove a winding fault, and a generator incident does not establish the tank's condition.
Relay event files, fault reports and factory test records help explain why the unit left service.
Around the site
The next step for a step-up
Prepare a record for each step-up transformer rather than combining several pads under one description. Include nameplate photographs, serial number, dimensions, weight, fluid records and the generator or inverter designation.
State whether bushings, radiators, fans, neutral equipment and control cabinets remain attached or have already been removed.
Transformer Buyers NC reviews step-up units anywhere in North Carolina, including failed equipment awaiting removal from a generator bay or inverter pad. Identify the site contact, disconnection status and access restrictions with the equipment records.
Those details establish the inspection scope and the work needed before pickup can proceed.
Get started
Get an offer in minutes
Five fields is all it takes. Photographs help, but a nameplate and a town are enough to start.
No fee, no obligation. We reply the same business day.
Tell us what you have
We reply the same business day.
Questions
Straight answers
Equipment types
Do you buy failed generator step-up transformers?
Yes. Transformer Buyers NC buys failed generator step-up transformers in North Carolina. Provide the nameplate, fault description, relay records and any post-fault electrical or fluid tests. Note damaged bushings, tank distortion or leaks so inspection and removal planning reflect the actual condition.
Service area
Which inverter transformer records should owners provide?
Provide the transformer nameplate, factory test report, single-line diagram and inverter identification. Include collector voltage, tap setting, grounding arrangement and recent fluid results where applicable. These records distinguish the transformer’s original electrical duty from assumptions based only on the solar or storage project name.
Payment
Can a battery storage transformer work both ways?
A battery storage transformer can carry power toward the batteries during charging and toward the grid during discharge. Its project role still requires checking the winding voltages, connections, grounding and inverter requirements. Bidirectional operation does not make every transformer suitable for every storage installation.
Logistics
Getting it off the pad: what should a seller know?
Removal begins only after the owner establishes isolation from the generator, inverter and grid connections. Qualified crews must address backfeed, stored energy and grounding before disconnecting bushings or cable elbows.