What we buy
Ranges we buy on this page
Transformer Buyers NC buys used, surplus, failed and obsolete solar inverter transformers anywhere in North Carolina. These step-up units connect solar inverters to the collection system at utility-scale farms, particularly across eastern and central counties.
This page is for solar asset managers, EPC contractors and crews removing inverter blocks. It explains the records, winding details, oil condition and pad access needed to evaluate a unit retired during repowering or after a fault.
| Phase | kVA | Voltage | Fluid |
|---|---|---|---|
| 3-phase | 500 - 5,000 kVA | 34.5 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
The unit itself
A solar inverter transformer steps inverter output voltage up to the farm’s medium-voltage collection system. The nameplate identifies the actual voltage pair; a 34.5 kV collection circuit is one common arrangement.
Depending on the inverter block design, the tank may contain multiple low-voltage windings serving separate inverter outputs within that block.
Inverter-duty rating matters because power-electronic output can impose harmonic heating and other stresses that differ from ordinary facility loads. Winding configuration, grounding provisions and impedance must match the documented inverter arrangement.
A photograph of the connection diagram often explains more than a project equipment list that simply calls the unit a step-up transformer.
Local reality
Where you find solar inverter in this state
Utility-scale solar farms across eastern and central North Carolina place these units beside inverter stations, along collection feeders or within packaged power blocks.
Sites in counties such as Halifax, Nash and Robeson can have long gravel access lanes between the public road and the particular pad scheduled for transformer removal.
Repowering can retire a serviceable step-up unit when new inverters require different secondary voltages, winding arrangements or block capacities. Solar units are often relatively young and well documented, with commissioning reports and maintenance records still accessible.
The removal reason should distinguish an equipment redesign from a winding fault or persistent overheating.
Around the site
Our inspection list
Our inspection starts with the nameplate, winding configuration and inverter-duty rating. Clear photographs should show every voltage designation, connection diagram and cooling designation.
For a unit with multiple inverter-side windings, identify which terminals belong to each circuit and whether any winding was isolated after a fault during its operating history.
The physical review includes the oil test and pad condition, along with bushings, elbows, radiators and tank seams. Look for oil beneath the drain valve, broken connector wells and corrosion where the cabinet meets concrete.
Record missing accessories and any collector-side cable damage before crews disturb the inverter station or pad.
Where it sits
Testing, oil and liability
A recent oil report helps separate a unit removed for repowering from one with an unresolved internal problem. Useful records include dielectric strength, moisture and dissolved gas results, with sample dates and laboratory identification.
Gas findings need context from loading, inverter trips and any protection operation immediately preceding the sample collection.
Oil identification and PCB documentation belong with the transfer records; the age of a solar farm does not replace documentation for its particular transformer. Where a tank has leaked beside an inverter pad, identify containment, cleanup status and responsibility before movement.
Keep spill records separate from evidence of electrical winding condition.
On the ground
Load-out and haul
Before load-out, qualified site personnel must isolate the inverter-side circuits and collection feeder, verify absence of voltage and complete the site’s grounding procedure. Disconnecting one inverter does not establish that every winding is safe.
The removal plan should identify cables, grounding conductors and auxiliary circuits attached to the tank or cabinet.
Shipping weight, lifting instructions and tank dimensions determine the crane setup and trailer selection. A lowboy may be appropriate, but the site route must accommodate turning space and axle loads.
Check soft shoulders, drainage crossings and tracker rows near the pad; a spreader bar must follow the manufacturer’s lifting arrangement.
Local reality
Valuation factors
The buy-side evaluation considers rated capacity, voltage ratio, winding configuration and documented inverter-duty suitability. A transformer built around a particular inverter block can be less broadly applicable than its capacity suggests.
Complete nameplate photographs and factory drawings help establish exactly what the unit is, rather than relying on the solar project’s description.
Removal condition matters as much as the repowering label. Recent test results, intact elbows, serviceable radiators and a dry tank provide a different assessment basis than fault records and missing cabinet parts.
Pad access, verified weight and the number of units being removed also shape the practical scope of a purchase.
Around the site
How to start the conversation
Start with the North Carolina site location, unit count and reason for removal. Include nameplate photographs, overall tank views, the winding diagram and the latest oil report.
State whether the transformer remains connected to an inverter block, has been disconnected on its pad or has already been moved to a staging area.
For a repowering project, include the outage window, crane access restrictions and the person authorized to release the equipment. Project asset numbers should match photographs and test reports so adjacent inverter stations are not confused.
Transformer Buyers NC buys these units statewide, including failed equipment with clearly described fault history and condition.
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
Can you buy units removed during solar repowering?
Yes. Transformer Buyers NC buys solar inverter transformers removed during repowering, including serviceable units displaced by a new inverter arrangement. Identify the old inverter configuration, transformer voltage ratio and removal reason. Commissioning records and recent oil results help document the unit’s condition.
Service area
Why does the inverter winding arrangement matter?
Some solar step-up transformers have multiple low-voltage windings connected to separate inverter outputs. Their connection diagram, grounding arrangement and impedance describe the intended application. A capacity rating alone does not establish compatibility, so provide the nameplate and factory winding diagram together.
Payment
What access details matter at a solar farm?
Provide the route from the public road to the inverter pad, including gate clearance, gravel lane condition and drainage crossings. Include shipping weight and lifting instructions if available. Tracker rows, overhead conductors and soft shoulders can restrict crane placement and trailer movement.
Logistics
Testing, oil and liability: what should a seller know?
A recent oil report helps separate a unit removed for repowering from one with an unresolved internal problem. Useful records include dielectric strength, moisture and dissolved gas results, with sample dates and laboratory identification.