Critical Power Group - Design, Installation and Support of Mission Critical Power Systems (UPS, TVSS, PDU and more). Virginia VA, Maryland MD, Washington DC
Issue 28: Transformer Retrofit Lowers Costs and CO2 at UC Merced October 2013

The Client

The University of California, Merced

The University of California, Merced requires a minimum of LEED Gold certification for all their on-campus buildings. Their team has been working to make improvements to upgrade the resource efficiency of the University's entire building stock as part of their sustainability mandate.

"We had not been aware that there were significant differences in transformer performance and efficiency. The Green Start program gave us the opportunity to judge for ourselves whether replacing the transformers would be an effective energy-saving strategy," noted John Elliott, the University's Assistant Director, Energy and Sustainability.

Back to the Top

The Study

First step here was to figure out the baseline performance of the transformers that were currently installed in the building. Data analyis would show just how much electrcity and cost were being lost by the older transformers. The results? The transformers didn't average more than 79% efficiency.

Next, Powersmiths removed the old transformers and replaced them with E-Saver- C3 model "L" transformers. The E-Saver-C3 meets the US Department of Energy's Candidate Standard Level 3 (CSL-3) efficiency level; the efficiency level deemed by the DOE to offer the lowest lifecycle cost. This replacement would mean that UC Merced could lower both direct energy losses and indirect losses associated with cooling.

Back to the Top


The Powersmiths E-Saver-C3 brought efficiency from 79% to 96%.

This essentially means that losses were reduced by 85%. In a year's time, the University will see this efficiency add up to 15,434 kWh in savings for just two transformers. Using the current rate of $0.15 per kWh, the E-Saver-C3 transformers will save the university $3,820 per year. In thirty years, the E-Savers are projected to save more than $200,000.

Below is a quick, run-down chart of the results:

E-Saver-C3 Results for the University of California, Merced

Back to the Top

Download for More Information

For the full story which this article is based on, download the original PDF article from the Critical Power Group website.

Back to the Top

In This Issue

- The Client
- The Study
- Findings
- Download for More Information

Contact Us

Email Us




For Email Newsletters you can trust

Critical Power Group Logo

Privacy Statement