1stess 500 / 625 / 1000 KW Bidirectional Power Conversion System
Advanced bidirectional power conversion system designed for commercial and industrial battery energy storage applications, connecting battery DC systems with three-phase AC networks.
System Overview
The 1stess bidirectional power conversion system serves as the critical interface between battery storage and AC power networks in commercial and industrial energy storage installations. Available in 500 kW, 625 kW, and 1000 kW configurations, this energy storage converter enables efficient battery charging and discharging for solar-plus-storage and microgrid applications.
Key Applications
- PV self-consumption optimization
- Peak shaving and demand management
- Microgrid energy storage integration
- Industrial energy management systems
Modular Platform Architecture
Built around 125 kW converter modules within a cabinet-based design, this transformerless configuration provides a standardized platform for seamless integration with battery systems, electrical protection, and supervisory controls.
Technical Interfaces
DC Specifications
Operating range: 580-1000 V DC | Full-load range: 625-950 V DC
AC Specifications
Rated voltage: 400 V three-phase | Frequency: 50/60 Hz
Communication Interfaces
RS485, CAN 2.0, Ethernet, and dry-contact interfaces for coordination with battery management and energy management systems.
Technical Specifications
| Parameter |
500 kW |
625 kW |
1000 kW |
| Rated AC Power |
500 kW |
625 kW |
1000 kW |
| Maximum DC Current |
800 A |
1000 A |
1600 A |
| Rated AC Current |
720 A |
900 A |
1440 A |
| Converter Module Rating |
125 kW |
125 kW |
125 kW |
Common Specifications
| Product Type |
Bidirectional Energy Storage Converter / PCS |
| Configuration |
Transformerless / Non-isolated |
| Operating Modes |
On-grid and Off-grid |
| Enclosure Versions |
Indoor IP21 / Outdoor IP55 |
| Indoor Dimensions |
1200 x 1000 x 2100 mm |
| Outdoor Dimensions |
1350 x 1000 x 2100 mm |
Enclosure Selection
Choose IP21 indoor version for sheltered equipment rooms or IP55 outdoor option for external installations. Consider temperature, ventilation, clearance, and local requirements during selection.
Project Support Services
1stess provides comprehensive project support including configuration review, OEM/ODM discussions, technical documentation, export packaging planning, shipping coordination, and commissioning assistance.
Request Quotation
Submit your project requirements for a customized PCS configuration and pricing:
- Required PCS power rating
- Battery operating voltage range
- Charge/discharge current limits
- Grid voltage and frequency parameters
- Installation environment (indoor/outdoor)
- Destination market requirements
- EMS/BMS interface specifications
Note: Final model selection, enclosure configuration, protocol requirements, and certification compliance should be confirmed during project engineering. Local grid connection requirements must be verified for specific models and destinations.
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