This is the core power PCBA board for residential & commercial hybrid energy‑storage PCS (Power Conversion System). It is the main power conversion board inside an all‑in‑one energy‑storage inverter. It performs bidirectional energy conversion between battery DC power and grid AC power, supporting coordinated operation of PV, battery and utility grid.
Hardware Structure Breakdown
- Left Section: Battery‑side Input
- BAT+ / BAT‑ terminals connect to lithium‑ion battery packs. Multiple large‑capacity electrolytic capacitors provide DC‑bus filtering. Heatsink assemblies hold DC‑DC bidirectional power semiconductors to control battery charging and discharging.
- Middle Section: LLC Resonant Converter & Inverter Bridge
- High‑voltage bulk electrolytic capacitors form the main DC bus. Heavy‑duty heat sinks accommodate high‑power MOSFETs / IGBTs. Metal clamping bars secure power devices for reliable thermal contact. High‑frequency LLC transformers provide galvanic isolation and voltage conversion.
- Right Section: EMC Filter & Grid‑tied Output
- Multiple common‑mode & differential‑mode inductors together with safety X/Y capacitors form a complete EMI filter circuit to meet grid‑tie EMC requirements. High‑power AC relays switch grid and load circuits. AC output terminals connect to utility grid or local loads.
Main Functions
- Bidirectional power conversion: Convert DC battery power to AC for on‑site use or grid‑feed‑in; convert grid AC back to DC for battery charging.
- PV energy processing: Accept solar PV input, charge battery and supply AC loads.
- Off‑grid backup capability: Deliver standalone AC power during grid blackouts.
- Grid‑compliant EMC design: Meets international electromagnetic compatibility standards for grid‑tied energy‑storage equipment.
Typical Application Scenarios
- Residential hybrid solar‑storage systems
- Small‑scale commercial backup power systems
- Off‑grid / backup energy‑storage all‑in‑one inverters
