7AC Technologies is developing ultra high efficiency air conditioning systems that use up to 70% less electricity compared to conventional HVAC technologies. The liquid desiccant and membrane based air conditioning system is targeted to achieve substantial energy savings by replacing existing rooftop HVAC systems on commercial and industrial buildings.  7actech.com

Acumentrics Holding Corporation consists of two wholly-owned subsidiaries: Acumentrics RUPS (Rugged Uninterruptible Power Supplies) and Acumentrics SOFC (Solid Oxide Fuel Cells). The RUPS subsidiary is a trusted market leader in rugged AC and DC power sources for harsh and combat environments as well as heavy-duty industrial applications. The SOFC subsidiary develops and manufactures a line of clean, reliable electric power generators with DC or AC outputs up to 10kW.  Acumentrics generators efficiently convert commonly available propane, natural gas or liquid fuels directly to electricity without combustion.  acumentrics.com

Autonomous Marine Systems Inc. produces wind and solar powered robotic boats that collect data from the oceans at low cost with zero emissions.  These AMS sailing drones can replace the expensive, petroleum powered ships doing this data collection today. Applications include acoustic data retrieval, weather monitoring, fisheries management, and climate modeling. automarinesys.com

Bevi makes machines that purify and enrich water directly from the tap. Their first product is a water cooler for offices that lets users instantly create sparkling, flavored, and vitamin-enhanced drinks. By providing a variety of options directly on demand (without bottles), Bevi uses far less plastic and energy than traditional water delivery companies. bevi.co

Supercomposites provide drastic improvements in mechanical, thermal, and electrical performance over commercially-available carbon fiber composites. They enable the construction of drastically lighter, yet stronger, components to accelerate breakthroughs in the energy and transportation sectors, while saving manufacturers time and costs.

Boston Materials’ Supercomposites can enable the reduction of over 100M tons of GHGs from the light weighting of air transportation alone.   They also can utilize up to 50% reclaimed/recycled fibers, demonstrating the first instance of “upcycling” in the carbon fiber value chain. Together, the performance and lifecycle enhancements of Supercomposites can redefine the state-of-the-art in composite materials.  bostonmaterials.co

CIMCON Lighting, Inc. is a leading provider of industrial strength “Internet of Lights” that enables 30% energy savings and over 50% reduction in maintenance and repair costs associated with outdoor lighting. With over a billion light points, and less than 1% connected, it is CIMCON Lighting’s mission to provide intelligent lighting controls that leverage the advances made in the “internet of things” (IoT) to provide solutions that improve the quality and reliability of outdoor lighting. cimconlighting.com

Energetic Insurance offers EneRate, a credit cover solar insurance product for 3rd party C&I solar developers and asset owners to cover offtaker repayment risk as well as lost revenue from projects where offtakers have defaulted on their PPA payment obligations. energeticinsurance.com

Enertiv is a prop-tech company that provides data-driven solutions for optimizing maintenance and utilities in office, warehouse, multifamily, industrial and retail real estate portfolios. Their sensors and data-capture fill in the “blind spots” in building operations and continuously track critical equipment, tenant space, and indoor environmental condition to feed operators a stream of actionable insights.  enertiv.com

EnergySage is the industry’s leading online comparison-shopping marketplace for turnkey solar PV systems. Homeowners, businesses and non-profits can easily and quickly request, review and compare quotes online from pre-screened solar installers.  energysage.com

FINsix Corporation, the worldwide leader in VHF power conversion technology (30 to 300MHz switching frequency), is bringing to market highly miniaturized power conversion products that offer excellent performance, high power density and superior reliability.  finsix.com

Leading Edge Crystal Technologies is developing kerfless, single crystal wafer manufacturing technology that enables a projected all-in cost reduction of at least 25% in solar panel manufacturing. This project also supports the production of sample wafers for process development and product demonstration with industry partners.

LineVision is dedicated to helping utilities optimize the performance of the electric power grid by improving transmission line capacity, reliability, and safety through advanced sensors and analytics. Their solution provides utilities with previously unavailable visibility on asset health and safety for optimized performance. LineVision’s turnkey, non-contact, systems can be rapidly deployed without the need for outages, live line work, or specialized equipment. linevision.co

MTPV makes semiconductor chips that convert heat directly into electricity.  Much like a solar panel will convert sunlight to electricity, MTPV solutions can convert any source of heat directly into electricity.  mtpv.com

MultiSensor Scientific has developed an advanced imaging capability for detecting, visualizing & quantifying methane leaks throughout the natural gas supply chain.  multisensorscientific.com

NG Advantage LLC delivers the economic and environmental benefits of North American natural gas to industrial and commercial customers who are not served by a pipeline.  ngadvantage.com

Pearl Certification provides third-party certification of high-performing homes across the nation: homes with features like solar, energy efficient HVAC, smart home devices, and much more. Through its network effect business model, which drives demand for home improvements and captures value for resale and appraisal, Pearl will transform the residential market by certifying 5% of the US housing stock in five years. The company sells its certification through approved contractor and real estate channel partners, helping to market differentiate and grow these high-quality local businesses. Pearl’s partners include ENERGY STAR, the National Association of Realtors, and the Appraisal Institute. www.pearlcertification.com

Powerhouse Dynamics provides an Enterprise Energy & Asset Management System to multi-site operators of small commercial facilities, such as restaurant, convenience store, and specialty retail chains.  The system, which combines controls with patented analytics with a unique user experience, reduces energy and equipment maintenance costs and has been shown to pay for itself in under a year in many cases. https://powerhousedynamics.com

PurposeEnergy helps breweries reduce their carbon footprint by treating their organic waste products with a patented anaerobic digestion process to generate energy that supplies most of the brewery’s power needs.  purposeenergy.com

Quidnet Energy is a technology-driven energy company powering the carbon-free electric grid. The company is developing an alternative approach to energy storage by storing water to deliver energy. This new form of sub-surface pumped hydro storage enables large-scale deployment of renewable energy and allows for predictable, dispatchable delivery of power from intermittent renewable energy resources such as solar and wind. Quidnet’s energy system is widely deployable and integrates seamlessly with existing generating facilities. www.quidnetenergy.com

Based in Boston, REsurety dramatically reduces wind volumetric risk from wind projects by brokering a hedge insurance product to guarantee a base level of power generation. The company’s ability to offer this hedge product is based on sophisticated localized and national data analytics developed to assess wind resource risk at a given project site and its relationship with a $10 billion insurance underwriter.  resurety.com

SparkMeter specializes in smart-meter mini-/micro- grid technology designed to bring distributed power to off-grid, rural communities (300 to 30,000+ meter systems) as well as central grid distribution utilities in African and Asian emerging markets.

The company has significant traction in these markets with more than 40,000 meters already installed, a robust pipeline of 100k’s more meters, as well as a strong group of existing investors.  sparkmeter.io

UltraCell Insulation is launching a breakthrough technology for making high performance cellulose building insulation from recycled materials.  Cellulose insulation outperforms fiberglass and is far less expensive to install than foam, so it has already become the nation’s fastest growing form of insulation. UltraCell’s unique and patented process allows it to utilize a variety of fiber sources to produce a clean, high performance product at a fraction of the costs of its competitors. www.ultracellinsulation.com

Voltserver has developed a digital power solution which enables Telecom Providers to remotely power remote equipment including cellular radios with absolute safety over existing twisted pair communications wiring. This eliminates the need for remote power infrastructure and remote battery backup. Voltserver supports the safe delivery of eight times the power normally available from Power over Ethernet technology, and is UL Approved.  voltserver.com

WeSpire (formerly Practically Green) is a cloud-based SaaS company that helps companies engage people in sustainability and responsibility initiatives with persuasive technology that builds awareness, drives behavior change and measures business results. Its mobile and web platforms empower people to take positive actions at work, at home and in their community. WeSpire recently won the “Best Doing Good Innovation” award from the Massachusetts Innovation & Technology Exchange (MITX), as well as Environmental Leader’s 2014 Product of the Year. Leading global corporations are leveraging the company’s fully customizable platform to power sustainability engagement programs for their employees and other key stakeholders. WeSpire pairs expert content with proven social and game mechanics to make embracing new habits simpler, faster and more fun.  wespire.com

Zagster is commercializing bikeshare as a service. The company offers a full-service model and next-gen technology that cuts the cost and complexity of planning and operating a bike share program for cities, universities, businesses and real estate complexes. http://www.zagster.com/

In June 2009, eQuilibrium was acquired by EnerNOC, Inc. eQuilibrium’s software-as-a-service (SaaS) solution enables commercial, institutional, and industrial enterprises to effectively monitor, mitigate, and monetize their carbon footprint through an efficient, comprehensive, and auditable process.

Acquired by Nest in May 2013, MyEnergy developed disruptive energy-tracking technology which it leveraged to power the world’s first universal rewards program for saving energy. MyEnergy furnished a free “Mint.com for energy” at myenergy.com that the New York Times called a great way to “squeeze more information out of your utility bill.” MyEnergy technology now powers innovative performance monitoring programs for the U.S. Green Building Council, Virginia’s Energy Sense campaign, and many more.  myenergy.com

Pika Energy was acquired by General Holdings, Inc. in April 2019.  Pika is an expert in developing advanced power electronics, software and controls for smart energy storage and management, and their integrated energy storage systems allow users to easily capture, store and use solar energy to reduce energy costs and minimize grid disruptions.  www.pika-energy.com

Acquired by Huada Semiconductor (HDSC) in September 2018, Solantro Semiconductor Corp. was a world leader in module integrated electronic technology for distributed intelligent solar solutions.  Founded in 2009, the company assembled a team of proven entrepreneurs with deep experience in system architecture, semiconductors, power conversion, RF and distributed communications systems.  Solantro worked closely with select visionary partners and customers to fundamentally redefine the manageability, scalability, reliability and economics of grid-tied Solar PV installations through deployment of highly-distributed power system architectures based on solid-state innovations.  solantro.com

VCharge, acquired by OVO in February 2017, developed a proprietary technology platform that changes how electric grids are controlled in preparation for the rapid transition to renewable energy and energy storage, helping to solve the problem of renewables intermittency.  vcharge-energy.com