Reliability and Resilience: Re-defined

3 min read
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By Jen Kugler & Paul Molta

3 min read
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Microgrids are local energy systems with sources of generation, storage, and advanced automation and control. They are able to function independently from the grid, delivering:

  • Energy cost certainty and optimization
  • Enhanced resilience and reliability
  • Accelerated emissions reductions

Reliability and resilience are both fundamental benefits of a microgrid. But the terms are easily mixed, and our team is often asked what the difference is, what reliability and resilience mean to our customers and us, and how we measure these important metrics. These are great questions, and we’re here to explain.

Reliability VS. Resilience or Reliability AND Resilience

We believe a resilient system is a reliable system. In other words, a system designed with high levels of resilience will also run with high reliability. For example, picture a manufacturing facility on the end of a long power line that experiences multiple power outages throughout the year, resulting in the loss of production time, product, and revenue. This is a highly unreliable system! The traditional approach to providing power during electrical outages is to add a set of emergency diesel generators. These help restore life-safety loads but are unlikely to support the entire facility. In addition, the facility would likely still experience a complete site outage before the diesel engines start up, resulting in a recurring fixed outage cost. During normal grid conditions, the diesel generators would idle, leaving the customer with an asset that has limited benefits even during the limited hours it is used. This approach delivers marginal resilience.

How can facilities tackle power reliability problems?

With a resilient microgrid system, on-site generation combined with battery energy storage allows the facility to seamlessly transition its critical loads from utility power to islanded operation during a utility outage.

With an on-site microgrid, the energy to the facility’s critical loads is 100% reliable in the event of a grid outage or intermittent power disruption. If energy reliability is a problem, resilience is the cure.

How AlphaStruxure defines Reliability and Resilience

Often energy reliability and resilience are defined from an electric utility perspective, measuring reliability and resilience on a distribution system level. The industry-wide acronyms for reliability all have “average” in their names which average outage frequency and outage duration over thousands of customers. 

At AlphaStruxure, we view reliability and resilience one client at a time. Our clients not only have power demands but thermal demands as well. They may have problems with outages along with power quality problems that contribute to an unreliable system. For these clients, a one-second outage may result in significant losses, or they may require backup power that extends beyond a 24-hour diesel storage tank.

Given our customer-focused approach, AlphaStruxure defines reliability and resilience for our microgrid systems as follows:

  • Reliability is providing the expected quantity and quality of any energy product
  • Resilience is how the system responds, adapts, and recovers from a reliability event (i.e., deviation from the expected quantity or quality of energy)

We see these definitions differently because, at AlphaStruxure, our focus is on:

  • Understanding all of a an organizations energy resilience needs — not just their electricity needs
  • Designing a microgrid that provides optimal resilience by balancing economic and sustainability goals
  • Improving our client’s operations with a more resilient system

We believe resilience improvements and the increased reliability it creates set our Energy as a Service microgrids apart. But we don’t just say our resilient system improves reliability; we guarantee it. Every AlphaStruxure microgrid is designed and optimized with guaranteed outcomes based on the client’s goals around resilience, reliability, greenhouse gas reduction, and cost stability.

Have questions about the reliability of your power or resilience of your facility? Comment below or email us at

Explore more on Microgrids

Deploying microgrids is a key resilience objective for the DoD. Existing EUL and PPA procurement authorities for microgrids can be combined into an Energy as a Service procurement model. The EaaS model draws from the EUL’s authority to execute land leases for the siting of energy infrastructure (microgrids) on DoD installations. It also draws from the PPA’s authority that enables a energy developer to contract with a DoD agency by selling energy in exchange for its services in financing, designing, building, owning, operating, and maintaining energy infrastructure. 
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About the Author

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Jen Kugler & Paul Molta

Solution Architects

Jen Kugler

Jen Kugler is a Senior Solutions Architect for AlphaStruxure.  As a Solutions Architect, Jen designs behind the meter generation solutions for clients that meet their economic, sustainability, and resilience goals. These are complex solutions to optimize with many variables and constraints including hourly energy demands, GHG emissions, and energy outage costs.  Jen has extensive experience with this optimization modeling, having built several integrated energy models for a variety of clients.

Jen has over 20 years of energy industry experience.  Prior to her time at Alphastruxure, Jen was a Senior Energy Engineer with Burns Engineering working on the energy team to complete a variety of energy design projects from multi-megawatt solar arrays to campus CHP projects.  Prior to Burns, Jen was also a Senior Energy Engineer for PowerSecure for 7 years, during her time at PowerSecure she completed several conceptual microgrid designs as well as combined heat and power, central plant, heat pump, and energy efficiency projects.  Jen started her career in utilities at ExxonMobil at the largest chemical/refinery site in North America.

Jen is a registered Professional Engineer in New York and Massachusetts.  She also holds a Certified Energy Manager Certificate from AEE (Association of Energy Engineers) and a LEED AP designation from the USGBC (United States Green Building Council).   Jen is a graduate of Rensselaer Polytechnic Institute, where she earned a BS in Chemical Engineering, Summa Cum Laude.

Paul Molta

Paul is a Solution Architect at AlphaStruxure where he works develop holistic technical solutions that meet the client’s energy needs as well as project timeline expectations, development expenses and overall economics for long-term EaaS opportunities.

Prior to AlphaStruxure, Paul was an Associate Project Development Engineer, Energy Storage and Microgrids at Ameresco. As part of the Federal Solutions team, he worked on designing and implementing energy storage and micro-grids, primarily as part of comprehensive energy-savings performance contracts (ESPCs).

Paul graduated with a Masters of Environmental Management from the Yale School of Forestry & Environmental Studies in 2017, where he concentrated in renewable energy development and transportation. Prior to attending Yale, Paul worked as an electrical engineer, mostly in Colorado. While at the National Renewable Energy Laboratory (NREL), he worked in the Commercial Buildings team on technology to eliminate parasitic energy consumption of miscellaneous electrical loads, as well as with the Field Testing team at the National Wind Technology Center testing utility-scale wind turbines. He also interned with the Rocky Mountain Institute where he contributed to the Electricity Distribution Evaluator (EDGE) model in order to quantify the value-added of distributed PV from a utility perspective.

Paul graduated from the University of Rochester with a B.S. and M.S. in Electrical and Computer Engineering specializing in Very-Large-Scale Integration and Wireless Sensor Networks, respectively.

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