Power transformers for sale.
New, unused surplus, used and reconditioned power transformers for utilities, data centers and industrial projects nationwide.
Featured equipment
View all inventory
J&J Transformers LLC is a power transformer supplier in Sugar Land, Texas, serving projects nationwide. Compare GSU, substation and surplus power transformers for sale, plus diesel generators, natural gas generators, gas turbines and steam power plants. Call Tommy at 346-276-9540 or email tommy@jjtransformers.com for specifications, price and current written availability.
About our equipment listings
Compare each listing's rating, condition, frequency, package scope and evidence. Generator and turbine positions are based on received offers or J&J's dated availability updates, as stated in each record. Record-review dates are not new availability checks. Call or email Tommy with the J&J reference for specifications, price, current allocation and delivery terms.
Transformer sales
Transformers for sale by voltage
Compare power transformer, GSU and substation requirements by voltage. Each offer retains its exact nameplate ratings, condition and included scope.
150 BESS units for sale · 5.6 MWh each
5.6 MWh LFP battery energy storage containers for sale
840 MWh total nominal energy across the offered lot. Liquid-cooled, 20-foot DC battery blocks from a U.S. warehouse. PCS skids quoted separately.
Call Tommy at 346-276-9540 for pricing and current written availability.
Large generator supply · Multiple allocations available
250 MW and 500 MW natural gas generator packages
J&J can supply and package multiple generator units around your required capacity, configuration and project schedule. Discuss available allocations for data centers, industrial facilities and power plants.
250 MW worth of generators available
The published CAT G3520K package comprises 100 new, unused 2.5 MW natural gas units at 60 Hz and 480 V, with the listed balance of plant. Equipment readiness: within 90 days after the escrow deposit.
250 MW specifications & pricing500 MW generator supply
Multiple natural gas generator allocations for a 500 MW requirement, supplied as a project-specific unit package. Request the proposed unit mix, gas specification, frequency, condition, included equipment and phased release schedule.
500 MW allocations & proposalJ&J can also supply and package diesel generators. These are two package capacities; they are not added together as 750 MW of separate stock. Current allocation, price, equipment scope and delivery are confirmed in writing.
Generator allocations, supply & packagingLarge projects. Clear equipment scope.
Substation to campus.
One project supply conversation.
High-MVA and high-kV transformer requirements, plus volume orders of padmounts and dry types from 500 kVA, switchgear and circuit breakers. Send the schedule you already use.
Completed equipment sales
Four confirmed transformer projects for data centers, utility temporary power and bitcoin power requirements.
SOLDTwo 100 MVA Waukesha Transformers for Data-Center Power
Two identical Waukesha transformers, each rated 100 MVA at 138/13.8 kV, sold by J&J for a data-center project.
SOLD75 MVA Prolec Transformer for a Texas Data Center
A 75 MVA Prolec transformer with 69/34.5 kV Wye–Wye windings, supplied by J&J for a Texas data center.
SOLD30 MVA GE Transformer for Temporary Utility Power
A 30 MVA GE transformer with a 69 kV primary, supplied by J&J to support a utility customer’s temporary-power requirement.
SOLD46/12.47 kV Wye–Wye Transformer for Bitcoin Power
A Federal Pacific transformer with a 46/12.47 kV Wye–Wye configuration, supplied by J&J for a bitcoin company’s power requirement.
Meet Tommy Marco
Over 10 years selling transformers.
J&J’s owner and CEO works directly with data centers, utilities, EPCs and industrial buyers on equipment requirements, technical records and purchase arrangements.
J&J Transformers LLC supplies power equipment nationwide from Sugar Land, Texas. Work directly with Tommy on specifications, purchase terms and delivery.
Learn more about TommyBefore you buy
Equipment buying guides
Prepare the records and requirements for a useful equipment quote. Review transformer inspection and winding connections, generator duty ratings, and battery storage power and energy.
Get started
Buy or sell equipment
Need equipment that isn’t listed?
Send your ratings, voltages, quantity and delivery date.
Email for AvailabilityOffering equipment?
Email the nameplate, photos, condition and location.
Offer equipmentWhere can I buy a power transformer and speak to someone?
Contact J&J Transformers LLC. Call Tommy Marco at 346-276-9540 or email tommy@jjtransformers.com for power transformer availability, price and delivery. J&J sells new, unused surplus, used and reconditioned transformers for projects nationwide. Each listing states its condition; current availability requires written confirmation.
Where is the equipment located?
Equipment dispatch and inspection locations are confirmed privately with J&J when reviewing the quotation. J&J is based in Sugar Land, Texas and serves projects nationwide.
What if my required unit isn’t listed?
Email Tommy your MVA or MW, voltages, quantity and required delivery date. J&J supplies transformers, generators and turbines for projects nationwide.
How do I confirm availability?
Call 346-276-9540 or email tommy@jjtransformers.com. Current condition, availability, price and delivery are confirmed in writing; subject to prior sale.