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Enphase Energy is a global energy technology company and a leading provider of solar, battery, and electric vehicle charging products. Founded in 2006, our innovative microinverter technology revolutionized solar power, making it a safer, more reliable, and scalable energy source. Today, the Enphase Energy System enables users to make, use, save, and sell their own power. Enphase is also one of the most successful and innovative clean energy companies in the world, with more than 80 million products shipped across 160 countries. Join our dynamic teams designing and developing next-gen energy technologies and help drive a sustainable future! About the Role The Enphase Energy SST Product Innovation Team sits in the Office of the CTO and is responsible for defining, prototyping, and scaling the next generation of Enphase storage and power systems. We are a fast-moving, multi-disciplinary group on a mission to push the boundaries of energy density, reliability, and system efficiency. You will be part of thermal solution team for cutting-edge medium-voltage power conversion systems, working side-by-side with power electronics, mechanical, and manufacturing engineers to bring world-class products to life. Your work will directly impact the reliability and performance of systems deployed at scale across the globe.
Job Responsibility
Apply rigorous first-principles thermal analysis
Decompose complex thermal problems into incremental steps
Design and harvest test results from thermal test vehicles (TTVs)
Own end-to-end thermal solution
Design and optimize air-cooled systems
Drive thermal analysis and simulation
Lead thermal testing and validation
Define thermal design rules and margins
Requirements
BS, MS, or PhD in Mechanical Engineering, Aerospace Engineering, or closely related field
Job title and level determined by candidate experience: Staff Engineer: BS + 8 yrs | MS + 6 yrs | PhD + 3 yrs: Sr. Staff Engineer: BS + 12 yrs | MS + 8 yrs | PhD + 5 yrs
Candidates with greater experience are strongly encouraged to apply
Strong theoretical thermal analysis — required
Thermal test vehicle design and execution — required
Structured problem decomposition — required
Deep expertise in air-cooled thermal design
Proficiency with thermal simulation tools
Thermal testing and instrumentation
Product design for reliability
Strong CAD proficiency
Excellent communication skills
Solution-oriented thinking
Nice to have
Familiarity with IEC, UL, and IEEE standards for electrical equipment thermal ratings and energy storage systems
Background in outdoor/field-deployed product thermal design (wide ambient range, solar load, weathering)
Familiarity with power electronics loss modeling to generate accurate thermal source inputs