Monolithic Power Systems vs Enphase Energy
Side-by-side comparison of AI visibility scores, market position, and capabilities
San Jose power management semiconductors (NASDAQ: MPWR) Q3 2025 revenue $737.2M (+18.9% YoY); Enterprise Data $191.5M (+33% QoQ) powering NVIDIA/Google/AMD AI GPU clusters, competing with Texas Instruments and Analog Devices.
About
Monolithic Power Systems, Inc. (MPS) is a San Jose, California-based analog and mixed-signal semiconductor company — publicly traded on NASDAQ (NASDAQ: MPWR) as an S&P 500 Information Technology component — designing high-performance power management integrated circuits for computing, cloud infrastructure, storage, automotive, industrial, and consumer applications through approximately 3,800 employees worldwide. In Q3 2025, Monolithic Power Systems reported revenue of $737.2 million (+10.9% sequentially, +18.9% year-over-year), with the Enterprise Data segment (AI server power management) reaching $191.5 million (+33% from Q2 2025) driven by strong demand for power management solutions in next-generation AI platforms from NVIDIA, Google, and AMD. CEO Michael Hsing founded MPS in 1997 and has led the company's growth from a consumer LED driver manufacturer to an AI infrastructure power management leader — with MPS power ICs now embedded in NVIDIA H100, H200, and GB200 GPU clusters as the voltage regulators that convert rack power supply voltage to the precise low-voltage, high-current supply that GPU cores require during AI training inference. MPS's proprietary Intelli-Phase multiphase power architecture delivers 99%+ efficiency for high-density AI compute power delivery — a competitive differentiation that directly affects data center PUE (power usage effectiveness) at scale.
Fremont CA solar microinverters (NASDAQ: ENPH) at $1.33B 2024 revenue (-42% correction); IQ microinverters + IQ Battery home energy system, 53.2% gross margin, residential solar demand recovery play competing with SolarEdge.
About
Enphase Energy, Inc. is a Fremont, California-based energy technology company — publicly traded on NASDAQ (NASDAQ: ENPH) as an S&P 500 Information Technology component — designing, manufacturing, and selling the IQ microinverter system for residential and commercial solar photovoltaic installations, the IQ Battery home energy storage system, and the IQ EV charger through approximately 3,700 employees worldwide. Enphase pioneered the microinverter architecture — where each individual solar panel has its own dedicated DC-to-AC inverter, compared to central string inverters that connect multiple panels in series — creating a system where one shaded or underperforming panel does not reduce the output of the entire array. In Q4 2024, Enphase reported revenue of $382.7 million (53.2% non-GAAP gross margin), shipping approximately 2.01 million microinverters (878 MW DC) and 152.4 MWh of IQ Batteries, with free cash flow of $159.2 million. Full year 2024 revenue was $1.33 billion, down 42% from 2023's peak — reflecting significant headwinds from elevated interest rates suppressing residential solar financing demand, an installer channel inventory correction as distributors worked down excess microinverter stock accumulated during the 2022-2023 supply chain restock, and European market softness. CEO Badri Kothandaraman has managed the demand cycle correction while maintaining Enphase's industry-leading gross margins and strong balance sheet ($1.72 billion in cash and marketable securities at year-end 2024).
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