Solar

Capacitors designed to meet the latest in new energy technology (e.g., solar microinverters).

The Knowles Advantage

Knowles delivers critical passive components that enable high-performance solar power conversion. Our portfolio includes metallized polypropylene film capacitors for DC link and harmonic filtering, aluminum electrolytic capacitors for ultra-high ripple current handling, and AEC-Q200-qualified multilayer ceramic capacitors (MLCCs) for high-frequency filtering and gate drive circuits. Custom capacitor assemblies and engineered DC link modules ensure long life, high-voltage stability, and superior thermal performance, meeting the rigorous demands of modern solar inverters and energy storage systems.

Knowles components for solar applications can be found in:

  • Microinverters: Compact inverters mounted on individual solar panels, enabling module-level power conversion and improved energy harvest.  
  • String Inverters: Devices that convert DC from a series of solar panels into AC for grid connection.
  • Central Inverters: High-capacity inverters designed for utility-scale solar farms, offering robust performance and optimized efficiency.
  • Hybrid PV Inverters: Solar and storage integration for enhanced flexibility and grid resilience.
  • AC Harmonic Filtering: Solutions that ensure grid compliance by removing harmonics from inverter outputs, improving power quality and system reliability.

Powering the Future of Solar

Enabling Efficient, Reliable, and Scalable Solar Energy Systems

Knowles provides reliable components for a sustainable future.

  • High-Performance Capacitors for Solar Inverters: Ensure stable voltage and efficient energy transfer in PV systems with Knowles’ advanced DC-link and filtering solutions.
  • Optimized Components for Micro-Inverter Architectures: Reliable DC-to-AC conversion at the panel level for greater flexibility and system efficiency.
  • Engineered for Extreme Conditions: Components built to withstand high temperatures and harsh outdoor environments, guaranteeing long-term durability.
  • Scalable Solutions for Growing PV Demand: Products designed to meet the evolving needs of large-scale solar projects and hybrid energy systems.

Educational Resources

Blogs
Whitepapers
Exploring Electronics Trends in Solar Power

Exploring Electronics Trends in Solar Power

The developmental trajectory of many modern power electronics systems is driven by evolving carbon dioxide (CO₂) regulations. By maintaining compliance, green energy production, like photovoltaics (PV) and wind, and high-efficiency distribution systems, like high-voltage direct current (HVDC) and battery energy storage systems (BESS), support our transition to a more sustainable future.
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View Article for Exploring Electronics Trends in Solar Power
Common Capacitors in Solar Power Conversion Systems

Common Capacitors in Solar Power Conversion Systems

Ongoing innovation in solar power electronics and rising interest in photovoltaic (PV) installations underscores the importance of robust and efficient electronic components. Capacitors play a key role in power conversion systems as they function to smooth and regulate power flow, protect against voltage surges and filter unwanted signals.
View Article for Common Capacitors in Solar Power Conversion Systems
View Article for Common Capacitors in Solar Power Conversion Systems
How Safety Capacitors Help You Deliver Safe and Efficient Solar Power

How Safety Capacitors Help You Deliver Safe and Efficient Solar Power

As solar adoption accelerates worldwide, inverter technology must also evolve to deliver greater efficiency, power density, and connectivity. Modern residential inverters are now required to manage energy from solar panels, battery storage, and the grid all while meeting stricter global safety standards.
View Article for How Safety Capacitors Help You Deliver Safe and Efficient Solar Power
View Article for How Safety Capacitors Help You Deliver Safe and Efficient Solar Power

Power Conversion Capacitors for Harsh Environments

Examine how growing outdoor power conversion applications are increasing performance demands.
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View Resource for Power Conversion Capacitors for Harsh Environments

Comparing High Temperature Capacitors for DC Link Buses

Comparing lead lanthanum zirconate titanate (PLZT) and strontium bismuth ferrum titanate (SBFT) dielectrics. Knowles' Hiteca...
View Resource for Comparing High Temperature Capacitors for DC Link Buses
View Resource for Comparing High Temperature Capacitors for DC Link Buses

Product Documentation

Capacitors for Photovoltaic (PV) Inverter Applications

High-reliability capacitors that maximize PV inverter efficiency, performance, and lifespan.
View Resource for Capacitors for Photovoltaic (PV) Inverter Applications
View Resource for Capacitors for Photovoltaic (PV) Inverter Applications

Custom DC Link Capacitors

Custom DC link and filtering capacitors deliver high ripple current performance, low inductance, and proven reliability.
View Resource for Custom DC Link Capacitors
View Resource for Custom DC Link Capacitors

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