E-Saver SOL OPAL™ Series 

Energy Efficient Transformers for Solar Applications

Specially designed for solar applications, the E-Saver SOL OPAL™ Series is a family of high performance low-voltage transformers optimized to deliver 25-40% less losses than a typical DOE 2016 compliant transformer, while contributing to LEED®, Net Zero and Sustainable Building designs.


E-Saver SOL OPAL™ Series (OPAL SOL) is an ultra-efficient, low-voltage, dry-type transformer optimized to maximize energy savings, exceeding DOE 2016* minimum efficiency requirement for solar applications.

The OPAL™ designed E-Saver SOL delivers top performance across the full load spectrum, as demanded by the wide load variation from extended hours at no load, to peak loading at 100% of capacity, typical on a daily basis.

The E-Saver SOL OPAL™ Series aligns with sustainable building designs such as LEED, Net Zero, and other buildings that emphasize building efficiency, the use of solar energy and sustainable procurement requirements. The E-Saver SOL OPAL™ series saves 25-40% less energy losses compared to a typical DOE 2016 compliant transformer.

Powersmiths enables right-sizing of electrical infrastructure by offering a much broader selection of transformer kVA sizes. The capital cost, operating cost and footprint reductions can be dramatic – on the order of 30-50%, through smaller transformers, breakers, conductors, and distribution panels. 
Powersmiths guarantees that every transformer we manufacture meets our published technical data, and furthermore, that this performance is met over the full term of the 32-year pro-rated warranty. Being able to trust that savings are both real and long-term is part of why organizations choose Powersmiths.
Many general purpose transformers are purchased and installed because they have the lowest first cost, however, they carry a UL label on the basis of feeding only linear loads. Since most connected loads today are electronic with nonlinear profiles, a low-voltage transformer needs to be K-rated in order to have a valid UL listing for most applications today. E-Savers are appropriately K-rated. 
By going meaningfully beyond the DOE 2016 baseline efficiency, the E-Saver™ contributes to green building, LEED®, Net Zero and carbon footprint reduction goals. Additional benefits include our ISO14001 certified manufacturing, integrated metering and ability to integrate with the Powersmiths WOW™ Sustainability Management Platform.
Powersmiths certifications include ISO 9001 (Quality), ISO 14001 (Environment), ISO 17025 (Efficiency Test Lab), UL and CSA. Powersmiths has a production integrated nonlinear load test program that enables efficiency verification under real-world conditions, as well as IPMVP compliant field measurement of losses and efficiency, and Certified Test Lab Load Profile test reports.
Integrated metering can provide information about capacity utilization, load profiles, power quality and energy use.

The lockable hinged door and our patented 360º Rotatable IR Port™ options, both provide quicker maintenance access and reduce arc flash safety risks.

*U.S. Department of Energy, 10 CFR Part 431, Subpart K – Distribution Transformers

E-Saver OPAL™ series maximizes savings.  Compare each model’s optimized load range and the application for the most transformer energy savings.

Compare All transformer Models

All PDUs Come Standard with OPAL™ Series Transformers: Application Efficiency Optimized with Managed Inrush Currents.

OPAL™ Transformer ModelsLoad Range & ApplicationSavings vs. DOE 2016*Winding Material **Continuous Overload CapacityK-Rating ***
Most light loads, feeding electronic equipment in schools, offices, commercial, institutional, applications
Widely varied equipment or process loading, or load changes over time
20%CU15%K1, K9, K13
High equipment loads. Pumps, elevators, etc. in labs, broadcast, datacenter, industrial etc.
25%CU/AL, CU opt.20%K13
Harmonic mitigation for heavy harmonic-rich loads with high densities of electronic equipment
Heavy loads for extended hours. Process equipment, labs, broadcast, telecom, and some data centers
35%CU/AL, CU opt.33%K20
Close to full continuous load. Labs, broadcast, telecom, and data centers, where overload capacity adds value, and energy rates and cooling costs are elevated
Solar Applications. Operating from full load for long hours to idling at night
30%CU/AL, CU opt.20%K20 but not required

*Estimated average energy savings for each load profile vs. DOE 2016 minimum efficiency rated transformer
**CU=Copper, CU/AL=Copper Primary with Aluminum Secondary
***K-Rating per IEEE-C57.110. The high K-factor rating is not the goal of the design, but a consequence of the low current densities used to achieve the high loading efficiency goals.

Contact the factory for the latest options, any questions or clarification.

  • 360º Rotatable IR Port™ – for easy and safe maintenance checks with zero downtime
  • Integrated Cyberhawk™ Metering
    • Express Logger™, SMART™, Cyberhawk TX™, Thermal Sensor
  • SPD  – Surge Protection Device
    • PRO80, PRO120, PRO200, PRO240, PROXX (Custom)
  • Seismic Bracing (OSHPD Certified 2.28g)
  • Lockable Hinge Doors
  • Sprinkler proof
  • Outdoor ventilated
  • Enclosure for outdoor public areas
  • Non-ventilated indoor enclosure
  • Lockable hinged doors
  • Custom color/Painted stainless steel enclosure
  • Lug-kits (Screw-type/Compression-type)
  • Wall-mount kit (up to 75kVA)
  • 50 Hz design
  • Very low inrush
  • Custom Impedance
  • Single, Dual, Triple electrostatic shield
  • Extra-low noise for sensitive environments
  • Routine test report
  • Nonlinear load test with certificate
  • Load profile test, ISO 17025 certified lab test
  • DOE 2016 test report