Currently, string photovoltaic (PV) inverters dominate the market. As the power capacity of PV inverters has increased from 228 kW to 320 kW, and is expected to reach 450 kW in the future, the substantial rise in power density demands more advanced cooling solutions. Our company has developed an optimal combination of heat pipe heat sinks, phase-change heat sinks, and plate-fin heat exchangers. This integrated cooling system provides the most efficient thermal management solution from IGBT chip cooling to full cabinet heat dissipation. With over 150 GW of total installed capacity in the market, our technology has been widely adopted, ensuring high reliability and performance.