Alternō - A Vietnamese Startup’s Bold Bet on Thermal Innovation with Sand Battery
In a world racing to decarbonize, one Vietnamese startup is betting on an unlikely hero: sand. Alternō’s thermal battery aims to revolutionize industrial heat, but can bold innovation alone power a sustainable path to global scale?
At a glance
Founded
2023
Industry
Climate Tech
Progress
Seed Round - 2024 Series A - 2025
Case Focus
Scaling Strategy, Business Expansion
Abstract
Alternō is a Vietnamese climate-tech startup seeking to decarbonize industrial heat by commercializing an unconventional yet scalable solution: sand-based thermal energy storage. Founded in response to Vietnam’s acute energy insecurity and heavy reliance on fossil fuels for agricultural and food-processing heat, Alternō developed thermal batteries capable of storing heat above 600°C using abundant, low-cost materials. This case study examines how Alternō transformed a technically simple concept into a commercially viable innovation tailored to emerging-market conditions.
Key findings highlight how the company validated demand through early deployments with tea and coffee processors, achieving meaningful reductions in fossil fuel use, energy costs, and emissions, while overcoming adoption barriers through its Heat-as-a-Service model and flexible financing schemes. Strategic partnerships with multinational corporations and development-linked investors further enhanced Alternō’s credibility and enabled entry into international markets such as Mongolia, Japan, and the Philippines.
The case also surfaces critical strategic tensions as Alternō prepares to scale: balancing mission-driven impact with financial sustainability, choosing between regional focus and global expansion, and deciding whether to position itself primarily as a technology provider or a green infrastructure partner.
Designed as a decision-making-oriented case study, it invites learners to evaluate Alternō’s strategic options at a pivotal inflection point, where technological innovation, business model adaptability, and cross-border collaboration jointly determine its long-term impact in the global clean-heat transition.
Keywords: Sand Battery, Thermal Energy Storage, Climate Tech Startup, Industrial Decarbonization, Heat-as-a-Service (HaaS), Clean Heat Solutions, Energy Innovation, Sustainable Business Model, Climate Technology Commercialization, Startup Scaling Strategy
Cover Photo: Denny Müller
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(1) Regarding Case Study Content: This case study is based mainly on secondary data and analysis of publicly available information unless otherwise stated, and is intended solely for educational purposes. Any opinions expressed by the author(s) are designed to facilitate learning discussion and do not serve to illustrate the effectiveness of the company. Additionally, banner images and logos used in the case study are intended for visualization in an educational setting and it is not used to represent or brand the company. For any dispute regarding the content and usage of images and logos, please contact the team.
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