Photovoltaic Inverter Capacitor Solution

Application

Description

Long lifespan DC-Link and filter capacitor solutions for photovoltaic inverters

Core Advantages

Ultra-Long Lifespan Film capacitor lifespan up to 100,000 hours at 70C, meeting PV system 25-year service requirements
High Efficiency Low ESR (2mOhm) and low dielectric loss, system efficiency improvement 0.5-1%
Self-Healing Characteristics Metallized film self-healing characteristics, automatic recovery after local breakdown, avoiding sudden failure
High dv/dt dv/dt up to 100V/us+, adapting to high-frequency switching applications
Environmental Safety Dry structure, no electrolyte, no leakage risk, environmental-friendly and pollution-free

Recommended Bill of Materials (BOM)

Item Part Number Description Quantity Datasheet
1 DC-Link 68uF/800V DC-Link Capacitor (5-10kW) 2 📄 Download
2 DC-Link 100uF/800V DC-Link Capacitor (10-20kW) 2 📄 Download
3 DC-Link 150uF/800V DC-Link Capacitor (20-30kW) 2 📄 Download
4 Filter Capacitor 10uF/450VAC AC-Side Filter Capacitor 3 📄 Download
5 Snubber Capacitor 0.47uF/1200V IGBT Snubber Capacitor 6 📄 Download

Applications

Residential PV Inverters (5-20kW)
Commercial PV Inverters (20-100kW)
Large PV Power Plants (100kW+)
Energy Storage Inverters
PV-Storage Integrated Systems

Technical Specifications

Applicable Power Range
5kW-100kW+
D C- Link Voltage
500VDC-1000VDC
Ripple Current
20Arms-50Arms
Operating Temperature
-40C to +60C (Ambient)
Expected Lifespan
100,000 hours at 70C
Protection Level
IP65 (Outdoor Installation)

Customer Success Stories

Leading PV Inverter Enterprise

New Energy |

Challenge

Original aluminum electrolytic capacitor lifespan insufficient, unable to meet 20-year warranty requirement

Solution

Fully switched to Jianghai DC-Link film capacitors

Results

System design lifespan reached 25 years, warranty extended to 20 years, customer satisfaction significantly improved

Energy Storage Inverter Manufacturer

Energy Storage |

Challenge

Energy storage system frequent charge/discharge, extremely high requirements for capacitor lifespan

Solution

Adopted Jianghai film capacitor + supercapacitor hybrid solution

Results

System cycle life exceeded 10,000 cycles, meeting energy storage system 10+ year service requirements

FAE Expert Insights

S

Senior FAE

Applications Engineer

10+ years

Professional Insights

Photovoltaic inverters are the core application market for Jianghai film capacitors. For selection recommendations: 1) Voltage selection: 800V capacitors for DC-link below 600V, 1000V capacitors for below 800V; 2) Capacitance selection: Calculate at 5-10uF per kW; 3) Temperature derating: Lifespan doubles for every 10C temperature decrease; 4) Installation notes: Use appropriate torque for fixing, avoid mechanical stress.

Key Takeaways

  • Voltage margin: Rated voltage >= Working voltage x 1.25
  • Capacitance calculation: 5-10uF/kW
  • Temperature derating: Lifespan doubles every 10C decrease
  • Film capacitors suitable for long lifespan requirement applications
  • Note installation torque, avoid mechanical stress

Decision Framework

Decision Framework
Steps:
  1. Evaluate requirements
  2. Compare solutions
  3. Consult FAE

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