A significant new player has quietly emerged in the rapidly expanding clean energy sector, as Drew Baglino, a former senior vice president at Tesla and current CEO of Heron Power, has established a new enterprise focused on heat pump technology. This venture, named Sadi Thermal Machines, marks Baglino’s second entrepreneurial endeavor since his departure from the electric vehicle giant in April 2024, signaling a strategic pivot towards decarbonizing residential and commercial infrastructure. The formation of Sadi, confirmed by sources and regulatory filings in Delaware and California, indicates a focused effort to bring advanced thermal management solutions to a broader market.

A New Chapter in Sustainable Technology

Sadi Thermal Machines was officially incorporated in June 2025 and operates from Scotts Valley, California, sharing its headquarters with Heron Power, Baglino’s other startup. Heron Power, which secured $140 million in funding to scale production of its solid-state transformers, represents another facet of Baglino’s commitment to energy innovation. The choice of name for his latest company, "Sadi Thermal Machines," is a poignant homage to Nicolas Léonard Sadi Carnot, the pioneering French physicist whose foundational work in the 19th century laid the groundwork for modern thermodynamics. Carnot’s theories on the efficiency of heat engines and cycles are fundamental to understanding technologies like the internal combustion engine and, crucially, the heat pump. This intellectual lineage underscores a deep-rooted scientific ambition at the core of the new company.

While details about Sadi Thermal Machines remain largely under wraps, initial observations, including a review of LinkedIn profiles and insights from individuals familiar with the startup, suggest a growing team comprising several former Tesla employees. This pattern is often seen as a significant indicator of a startup’s potential, bringing with it a culture of innovation, rigorous engineering, and a shared vision derived from one of the most disruptive companies of the 21st century. The aggregation of talent with a shared history in high-stakes technological development suggests Sadi is poised to tackle complex engineering challenges within the thermal management sphere.

Baglino’s Tesla Legacy: Mastering Thermal Dynamics

Drew Baglino’s nearly two-decade tenure at Tesla was marked by extensive contributions across the company’s most critical technological advancements. From the pioneering Roadster to the sophisticated Powerwall and Powerpack energy storage systems, Baglino’s influence permeated many facets of Tesla’s product development. By the time of his departure, he had ascended to the role of Senior Vice President, where he oversaw the intricate development of Tesla’s core energy technologies, including electric motors, advanced battery systems, and power electronics. This comprehensive background provided him with unparalleled expertise in optimizing energy efficiency and thermal performance in demanding applications.

A particularly relevant aspect of Baglino’s work at Tesla involved the company’s innovative heat pump systems for electric vehicles. He is credited as an inventor on a significant patent detailing a sophisticated thermal management system that utilizes two distinct coolant loops: one dedicated to cooling the battery pack and another for regulating the temperature of drivetrain components. This dual-loop architecture, managed by intricate three-way and four-way valves, grants an electric vehicle’s thermal system highly precise control over the temperature of various critical components. Such a system enables advanced functionalities, such as harvesting waste heat from the traction motor to pre-heat the battery, thereby ensuring optimal performance during fast charging, especially in colder climates where battery efficiency typically suffers.

This patent laid crucial groundwork for what would become Tesla’s celebrated "octovalve" system, a groundbreaking innovation that first appeared in the Model Y. The octovalve effectively integrates the management of cabin climate, battery temperature, and motor cooling into a single, remarkably compact unit—roughly the size of a standard suitcase. At its debut, Tesla’s octovalve system represented a significant leap forward in automotive thermal management, offering efficiency and control capabilities that surpassed those of many competitors. This technological prowess not only improved vehicle performance and range but also enhanced passenger comfort and accelerated charging times, setting a new benchmark for the industry.

The Enduring Principles of Sadi Carnot

The decision to name the new company after Nicolas Léonard Sadi Carnot is more than just a nod to scientific history; it underscores the fundamental principles that govern heat pump technology. Carnot’s work, particularly his theoretical Carnot cycle, established the maximum possible efficiency for any heat engine or refrigerator operating between two temperature reservoirs. While real-world devices cannot achieve this theoretical maximum, Carnot’s principles provide the ideal against which all practical thermal machines are measured.

Heat pumps, at their core, are devices that transfer thermal energy from one space to another. Unlike traditional furnaces that generate heat through combustion, or air conditioners that simply move heat out, heat pumps can both heat and cool a space by moving heat in either direction. This makes them incredibly versatile and energy-efficient. The technology itself is not new, with early refrigeration systems embodying similar principles. However, modern advancements in refrigerants, compressor technology, and control systems have dramatically improved their efficiency, making them a cornerstone of sustainable building design. Baglino’s choice to invoke Carnot suggests a deep commitment to pushing the boundaries of what is thermodynamically possible in practical applications, seeking to maximize efficiency and performance in his new line of thermal machines.

A Burgeoning Market for Efficient Climate Control

The foundation of Sadi Thermal Machines arrives at a pivotal moment for the heat pump industry. For years, Tesla executives, including Baglino and CEO Elon Musk, publicly mused about the potential for Tesla to develop residential and commercial heat pump systems. During an earnings call in 2022, they openly discussed the prospect of creating a single integrated heat pump system that could manage both HVAC (heating, ventilation, and air conditioning) and water heating for buildings.

Baglino articulated the strong alignment of such a venture with Tesla’s overarching mission to accelerate the global transition to sustainable energy. He specifically noted the relative ease of designing a heat pump for a stationary home compared to the immense constraints of mass, volume, and energy efficiency inherent in a vehicle application. "Way harder in a vehicle," he remarked, highlighting the engineering challenge of compacting advanced thermal systems into electric cars. While Musk acknowledged the intention to pursue such a system, he famously added a qualifier: "It is a thing we will do, but we’re not committing to a time frame at this point." Tesla has yet to release a dedicated residential HVAC or water heating system, leaving a significant void that Baglino now appears poised to fill with Sadi Thermal Machines.

The market for heat pumps is experiencing unprecedented growth, driven by a confluence of factors including rising energy costs, increasing environmental awareness, and supportive government policies. Across the globe, nations are enacting legislation and offering incentives to encourage the adoption of electric heat pumps as a key strategy for decarbonizing buildings. In the United States, initiatives like the Inflation Reduction Act provide substantial tax credits and rebates for homeowners who install high-efficiency heat pumps, making the technology more accessible and economically attractive. Europe is also aggressively pushing for heat pump adoption as part of its broader climate goals and energy independence strategies.

Strategic Vision and Industry Implications

Sadi Thermal Machines enters a competitive landscape, but Baglino’s background provides a distinct advantage. His extensive experience at Tesla, particularly in developing highly integrated, software-driven, and energy-efficient systems, could translate into a new generation of heat pumps that are more compact, intelligent, and efficient than existing offerings. The "Tesla mafia" phenomenon, where former employees go on to found successful startups leveraging the lessons and culture of their previous employer, has already yielded numerous innovative companies in various sectors. Sadi Thermal Machines appears to be the latest iteration of this trend in the clean energy space.

The potential synergy between Sadi Thermal Machines and Heron Power is also noteworthy. While solid-state transformers focus on grid infrastructure and power distribution, advanced thermal management systems require highly efficient and reliable power electronics. If Baglino’s two companies can find ways to integrate or complement each other’s technologies, it could create a powerful ecosystem of interconnected, high-performance energy solutions.

However, the path for a new startup in this capital-intensive sector is not without its challenges. Sadi will need to secure significant funding, navigate complex manufacturing processes, build out robust supply chains, and overcome the hurdles of market penetration against established players. The residential and commercial HVAC markets are mature, with entrenched brands and distribution networks. Sadi’s success will likely hinge on its ability to offer genuinely disruptive innovation, superior efficiency, ease of installation, and a compelling value proposition that resonates with both consumers and installers.

Drew Baglino’s latest venture is a testament to the ongoing entrepreneurial spirit driving the energy transition. By bringing his deep expertise in advanced engineering and thermal dynamics from the automotive world into the built environment, Sadi Thermal Machines holds the promise of accelerating the shift away from fossil fuels in homes and businesses, contributing significantly to a more sustainable future. The industry will be watching closely to see how this former Tesla luminary makes good on his vision to democratize highly efficient thermal management.