<div><span style="font-size:11.0pt;line-height:115.0%;font-family:Calibri , sans-serif;">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.</span></div><div><span style="font-size:11.0pt;line-height:115.0%;font-family:Calibri , sans-serif;">Join our dynamic teams designing and developing next-gen energy technologies and help drive a sustainable future!<br><br>Must be available to work on-site at our Bangalore office 5 days per week.</span></div><div><span style="font-size:11.0pt;line-height:115.0%;font-family:Calibri , sans-serif;"> </span></div><div><span style="font-size:11.0pt;line-height:115.0%;font-family:Calibri , sans-serif;">About the role</span></div><div><span style="font-size:11.0pt;line-height:115.0%;font-family:Calibri , sans-serif;"> </span></div><div><span style="font-size:11.0pt;line-height:115.0%;font-family:Calibri , sans-serif;">As a Principal Thermal Solutions Engineer, you will own the endtoend thermal architecture, cooling strategy, and safety design for Commercial &amp; Industrial (C&amp;I) and Utilityscale Battery Energy Storage Systems (BESS), spanning outdoor cabinets and containerized platforms. You will define and architect HVACbased, liquidcooled, aircooled, and hybrid thermal systems that support multiMWh energy storage installations operating in demanding outdoor environments. </span></div><div><span style="font-size:11.0pt;line-height:115.0%;font-family:Calibri , sans-serif;">This role requires deep, handson expertise in thermal system design, advanced simulations, and BESS safety compliance. You will work closely with battery, mechanical, electrical, controls, systems, safety, and manufacturing teams to ensure thermal solutions meet performance, reliability, manufacturability, serviceability, compliance, and cost targets, delivering productionready designs from concept through deployment while optimizing CAPEX and longterm OPEX. </span></div><div><span style="font-size:11.0pt;line-height:115.0%;font-family:Calibri , sans-serif;">What you will be doing</span></div><div><span style="font-size:11.0pt;line-height:115.0%;font-family:Calibri , sans-serif;"> </span></div><div><span style="font-size:11.0pt;line-height:115.0%;font-family:Calibri , sans-serif;">Proven ability to own endtoend thermal system architecture and delivery for cabinetlevel and containerized BESS platforms, from concept through production and field deployment </span></div><div><span style="font-size:11.0pt;line-height:115.0%;font-family:Calibri , sans-serif;">Deep handson expertise in HVACbased, liquidcooled, aircooled, and hybrid thermal systems for batteries and power electronics, including heat exchangers, chillers, cooling plates, pumps, valves, manifolds, fans, ducting, and venting devices </span></div><div><span style="font-size:11.0pt;line-height:115.0%;font-family:Calibri , sans-serif;">Strong application of firstprinciples thermal engineering to design efficient, reliable, and costeffective cooling solutions </span></div><div><span style="font-size:11.0pt;line-height:115.0%;font-family:Calibri , sans-serif;"> </span></div><div><span style="font-size:11.0pt;line-height:115.0%;font-family:Calibri , sans-serif;">Who you are and what you bring</span></div><div><span style="font-size:11.0pt;line-height:115.0%;font-family:Calibri , sans-serif;"> </span></div><div><span style="font-size:11.0pt;line-height:115.0%;font-family:Calibri , sans-serif;">12–15+ years of handson experience (Bachelor’s or Master’s) in Mechanical or Thermal Engineering, with mandatory ownership of Commercial and Utilityscale BESS thermal architectures </span></div><div><span style="font-size:11.0pt;line-height:115.0%;font-family:Calibri , sans-serif;">Expertlevel proficiency in thermal and CFD simulations, performing systemlevel and detailed thermal analysis, including:  </span></div><div><span style="font-size:11.0pt;line-height:115.0%;font-family:Calibri , sans-serif;">Airflow and systemflow simulations </span></div><div><span style="font-size:11.0pt;line-height:115.0%;font-family:Calibri , sans-serif;">Transient and steadystate thermal analysis using tools such as Icepak, Fluent, COMSOL, and FLACS </span></div><div><span style="font-size:11.0pt;line-height:115.0%;font-family:Calibri , sans-serif;">Experience translating simulation results into productionready, compliant designs, including analyses supporting NFPA 68 (Deflagration Venting) and NFPA 69 (Explosion Prevention) </span></div><div><span style="font-size:11.0pt;line-height:115.0%;font-family:Calibri , sans-serif;">Deep experience leading thermal runaway analysis, containment design, venting, pressurerelief mechanisms, and propagationmitigation strategies </span></div><div><span style="font-size:11.0pt;line-height:115.0%;font-family:Calibri , sans-serif;">Handson leadership in LSFT and UL 9540A testing, failure evaluations, and posttest design improvements </span></div><div><span style="font-size:11.0pt;line-height:115.0%;font-family:Calibri , sans-serif;">Strong systemlevel understanding of PCS architectures, battery rooms, DC vs ACcoupled systems, and thermal coordination with BMS, EMS, and PCS derating logic </span></div><div><span style="font-size:11.0pt;line-height:115.0%;font-family:Calibri , sans-serif;">Demonstrated capability designing for highambient (45–55 °C), highaltitude, corrosive environments, and longduration (2–8+ hour) energy storage systems </span></div><div><span style="font-size:11.0pt;line-height:115.0%;font-family:Calibri , sans-serif;">Expertise in reliabilitydriven thermal design, including 15–25year systemlife targets, redundancy, failsafe and degradedmode operation, and OPEXoptimized cooling strategies </span></div><div><span style="font-size:11.0pt;line-height:115.0%;font-family:Calibri , sans-serif;">Proven experience driving DFMEA, rootcause analysis, and corrective actions based on test data and field feedback </span></div><div><span style="font-size:11.0pt;line-height:115.0%;font-family:Calibri , sans-serif;">Experience leading supplier selection and technical design reviews, balancing performance, reliability, manufacturability, and cost (CAPEX/OPEX) </span></div><div><span style="font-size:11.0pt;line-height:115.0%;font-family:Calibri , sans-serif;">Working knowledge of global safety and compliance standards, including UL 9540/9540A, NFPA 855/68/69, and IEC standards, with experience supporting certification and AHJ interactions </span></div><div><span style="font-size:11.0pt;line-height:115.0%;font-family:Calibri , sans-serif;">Strong technical leadership skills, with the ability to lead programs, influence architecture decisions, and mentor senior and stafflevel engineers </span></div><div><span style="font-size:11.0pt;line-height:115.0%;font-family:Calibri , sans-serif;"> </span></div>

At Enphase, we think big. We’re on a mission to bring solar energy to the next level, one where it’s ready to meet the energy demands of an entire globe. As we work towards our vision for a solar-powered planet, we never lose sight of the three commitments that have guided us from the beginning: innovation, quality, and responsibility.
We’ve always pushed the boundaries of solar technology, ever since our founders took one look at a string inverter and knew they could do better. We’re still at it. We’re passionate about developing new technologies that make energy more intelligent, more connected, and more cost effective than ever before.

Mission
To deliver technology solutions that make clean energy affordable, reliable and accessible to all.

Values
We are experts in our discipline and love what we do
We are passionate about winning
We have high aspirations and set bold goals
We are enthusiastic about delivering the best customer experience
We are open, honest, transparent and respectful with our colleagues

Vision
The world's leading clean energy solution provider

We're changing energy. Come join us.

Principal Engineer, Thermal

<div><span>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.</span></div><div><span>Join our dynamic teams designing and developing next-gen energy technologies and help drive a sustainable future!<br /><br />Must be available to work on-site at our Bangalore office 5 days per week.</span></div><div><span> </span></div><div><span>About the role</span></div><div><span> </span></div><div><span>As a Principal Thermal Solutions Engineer, you will own the endtoend thermal architecture, cooling strategy, and safety design for Commercial &amp; Industrial (C&amp;I) and Utilityscale Battery Energy Storage Systems (BESS), spanning outdoor cabinets and containerized platforms. You will define and architect HVACbased, liquidcooled, aircooled, and hybrid thermal systems that support multiMWh energy storage installations operating in demanding outdoor environments. </span></div><div><span>This role requires deep, handson expertise in thermal system design, advanced simulations, and BESS safety compliance. You will work closely with battery, mechanical, electrical, controls, systems, safety, and manufacturing teams to ensure thermal solutions meet performance, reliability, manufacturability, serviceability, compliance, and cost targets, delivering productionready designs from concept through deployment while optimizing CAPEX and longterm OPEX. </span></div><div><span>What you will be doing</span></div><div><span> </span></div><div><span>Proven ability to own endtoend thermal system architecture and delivery for cabinetlevel and containerized BESS platforms, from concept through production and field deployment </span></div><div><span>Deep handson expertise in HVACbased, liquidcooled, aircooled, and hybrid thermal systems for batteries and power electronics, including heat exchangers, chillers, cooling plates, pumps, valves, manifolds, fans, ducting, and venting devices </span></div><div><span>Strong application of firstprinciples thermal engineering to design efficient, reliable, and costeffective cooling solutions </span></div><div><span> </span></div><div><span>Who you are and what you bring</span></div><div><span> </span></div><div><span>12–15+ years of handson experience (Bachelor’s or Master’s) in Mechanical or Thermal Engineering, with mandatory ownership of Commercial and Utilityscale BESS thermal architectures </span></div><div><span>Expertlevel proficiency in thermal and CFD simulations, performing systemlevel and detailed thermal analysis, including:  </span></div><div><span>Airflow and systemflow simulations </span></div><div><span>Transient and steadystate thermal analysis using tools such as Icepak, Fluent, COMSOL, and FLACS </span></div><div><span>Experience translating simulation results into productionready, compliant designs, including analyses supporting NFPA 68 (Deflagration Venting) and NFPA 69 (Explosion Prevention) </span></div><div><span>Deep experience leading thermal runaway analysis, containment design, venting, pressurerelief mechanisms, and propagationmitigation strategies </span></div><div><span>Handson leadership in LSFT and UL 9540A testing, failure evaluations, and posttest design improvements </span></div><div><span>Strong systemlevel understanding of PCS architectures, battery rooms, DC vs ACcoupled systems, and thermal coordination with BMS, EMS, and PCS derating logic </span></div><div><span>Demonstrated capability designing for highambient (45–55 °C), highaltitude, corrosive environments, and longduration (2–8+ hour) energy storage systems </span></div><div><span>Expertise in reliabilitydriven thermal design, including 15–25year systemlife targets, redundancy, failsafe and degradedmode operation, and OPEXoptimized cooling strategies </span></div><div><span>Proven experience driving DFMEA, rootcause analysis, and corrective actions based on test data and field feedback </span></div><div><span>Experience leading supplier selection and technical design reviews, balancing performance, reliability, manufacturability, and cost (CAPEX/OPEX) </span></div><div><span>Working knowledge of global safety and compliance standards, including UL 9540/9540A, NFPA 855/68/69, and IEC standards, with experience supporting certification and AHJ interactions </span></div><div><span>Strong technical leadership skills, with the ability to lead programs, influence architecture decisions, and mentor senior and stafflevel engineers </span></div><div><span> </span></div>

Principal Engineer, Thermal

About the Job

About the Company

EnPhase Energy

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