Solar Energy
Grid Switching Cabinet (STS)
A static/automatic transfer switch that shifts critical loads between PV, battery, grid and generator in under 10 milliseconds, with dual output for critical and normal loads.
Commercial & utility energy storage
A commercial battery energy storage system (BESS) stores large amounts of energy for peak shaving, backup and grid support. High-voltage LiFePO4 cabinets pair with a power conversion system (PCS) to charge from solar or grid and discharge when tariffs or demand peak, with intelligent air cooling and multi-layer fire and thermal protection.
Outdoor IP54 cabinets of 100 kW / 215 kWh parallel together to reach megawatt-class capacity, with smart EMS coordinating solar, battery, grid and generator. OCALWA supplies matched PCS, battery cabinets and transfer switches from one verified factory.
Key features
Specifications
| Transfer type | STS + integrated ATS module |
|---|---|
| Switching time | 8-10 ms (PV / battery / grid) |
| Critical-load transfer | <10 ms |
| Grid type | Three-phase |
| Output voltage | 220/380, 230/400 Vac |
| Smart-load pass-through | 200 A |
| Generator input | 75.8 A (Gen port) |
| Dual output | Critical-load bus + normal-load bus |
| Communication | RS485, CAN |
Configurations & options
Voltage, power rating, battery capacity and configuration are matched to your project, grid and climate. Send us your load, backup and site details and we will size the right system.
Why choose this BESS
Cut energy costs
Peak shaving and valley filling shift energy to cheaper hours and lower demand charges.
Backup and grid support
Fast transfer and frequency/voltage regulation keep operations running on weak or unstable grids.
Grows to megawatts
Standard 100 kW / 215 kWh cabinets parallel up to about 1.5 MW / 3.2 MWh as demand grows.
Ready to import at container scale?
Frequently asked questions
These cabinets use intelligent forced-air cooling with heptafluoropropane fire suppression; they are outdoor IP54 rated and reach utility scale by paralleling cabinets rather than a single container.
Yes. A static/automatic transfer switch shifts critical loads between PV, battery, grid and generator in under 10 milliseconds, suitable for hospitals and data centres.
Yes. With the transfer switch and EMS it can island critical loads and run on solar plus battery during grid failure, and coordinate a diesel generator for extended outages.
The LiFePO4 cells are rated for 20+ years of design life with thousands of cycles; commercial warranty terms (typically 5-10 years on the system) are confirmed per project.
Yes. We consolidate matched inverters, batteries, panels and balance-of-system from one verified factory into full containers, with export documentation, certification and quality control managed by OCALWA.