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Appleton, WI

Bubolz Nature Preserve: Energy Resilience and Sustainability

Distributed Energy Resources/Microgrids   |   EV Charging

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trail sign for bubolz nature preserve a renewable energy client

The Bubolz Nature Preserve is a non-profit environmental preserve located in Northeast Wisconsin. For more than 45 years, the preserve has invited the public to enjoy its beautiful recreational and educational opportunities. In 2017, Faith Technologies Incorporated (FTI), the parent brand of EnTech Solutions, partnered with Bubolz on a much-needed rebuild of their nature center facility. 

Challenge: Aligning Environmental Preservation Goals with Sustainability 

Bubolz had been engaged in a facility-improvement fundraising campaign for several years. With similarly aligned values of environmental preservation and sustainability, FTI offered a comprehensive solution: a smart system building that met the challenging initial needs of the client and delivered energy resilience and environmental sustainability to support the future of the non-profit organization. 

Solution: Smart, Resilient Distributed Energy Resources & EV Charging 

Deploying renewable energy was key to enhancing and preserving the environmental facility. Faith Technologies, a sister division to EnTech Solutions, engineered the photovoltaic system. 

To further the renewable energy capabilities of the new Bubolz facility, an energy-producing microgrid was designed and implemented. The Bubolz microgrid utilizes five distributed energy resources (DERs), as well as power from the utility. It can also function in island mode and not utilize power from the grid. These combined systems eliminated the preserve’s power utility bills, reducing their yearly energy spend by $30,000. 

EV charging stations at the bubolz nature center

The Bubolz microgrid controller can make decisions based on economics and weather data to determine the most economical power generation capabilities. It is managed by Schneider Electric’s EcoStruxure™ Microgrid Advisor, a cloud-based software platform. The sophisticated tool can autonomously configure the DERs into a range of different combinations to produce the most efficient, clean and cost-effective blend of energy resources available at any given time. Any excess energy can be fed to the central electric grid, providing grid stabilization for the larger community. The advanced microgrid was designed and operational in only six months. 

With the abundance of energy produced by the Bubolz microgrid, EnTech Solutions also installed six level-2 electric vehicle (EV) charging stations, which utilize solar power and two forms of energy storage as the primary source of power. The charging stations are available to the public free of charge and are an additional environmental amenity for Bubolz visitors to sustainably charge their vehicles. 

Immersion Center

outside view of the bubolz center a distributed energy client

Not a typical component of a microgrid, the Immersion Center at Bubolz was developed to help tell the story of the technology. It houses the microgrid controller and features an equipment viewing area. Pre-assembled in a shipping container at Excellerate, a sister division of EnTech Solutions, and delivered to the site, it also demonstrates the type of container build options available: either retrofitted to attach to an existing facility or serving as a stand-alone unit. Data from the microgrid can also be monitored remotely. 

Bubolz’s 18,000-square-foot lodge features the most advanced fixtures, including energy-efficient bulbs and lighting control. The preserve’s output of lighting-based energy was reduced by more than 50% of a typical building. In addition to lighting efficiencies, EnTech leverages the abundance of electricity produced from the solar field to power an innovative variable refrigerant flow (VRF) heating and cooling system. This controllable system utilizes compressed refrigerant, similar to a heat pump, for highly efficient heating and cooling and can be operated on power created by the solar field and stored on batteries, making it a living lab for demonstrating leading-edge energy technologies. 


FTI and EnTech Solutions created an energy solution for Bubolz Nature Preserve that supports the environment, promotes research and development and creates overall operating expense reduction. As a non-profit organization, many of the preserve’s past fundraising dollars went to utility and facility costs. Their new facilities, leveraging clean, efficient energy generation enable them to focus on more impactful fundraising to help grow their mission: 

To serve as a gathering place for the community to become inspired by, appreciate and enjoy nature through educational programming and recreational opportunities, while fostering a healthy environment and providing an improved quality of life.


Microgrid Specs

Item Details
Microgrid Type ECC 
Technical summary  
Customer Load 20-120kW load, seasonal dependent 
Design Output kW Dependent on needs of facility; DERs designed to support full facility load 
Distributed Energy Resources 200kW AC solar photovoltaics  
100kW/420kWh lithium-ion battery energy storage system 
25kW fuel cell with 8 hours of hydrogen storage at full power, generated by onsite electrolyzer powered from excess solar 
65kW microturbine providing energy and heating 
60kW natural gas generator 
Supplemental Power Generation  
Grid Connection Yes, and can island during a power outage 
All components coordinated via Schneider Electric EcoStruxure™ Microgrid Advisor  


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