Deye - Static Transfer Switch (STS) Three Phase

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Deye - Static Transfer Switch (STS) Three Phase 

SKU: SUN-STSS500L

The Deye - Static Transfer Switch (STS) Three Phase (SKU: SUN-STSS500L, manufacturer model SUN-STS500L) is a high-power 500 kW three-phase switching module engineered for Deye commercial and industrial energy storage systems (C&I ESS). Designed to seamlessly manage transitions between on-grid, off-grid, and diesel generator operating modes, it achieves an ultra-fast switching time of less than 20 ms to maintain uninterrupted power continuity for critical commercial loads. Featuring independent 500 kW high-power paths for grid, load, and generator ports, a single STS module connects up to five 100 kW PCS units or four 125 kW PCS units, and up to five STS units can be paralleled to support large-scale 2.5 MW microgrid architectures.

Key Features: Deye - Static Transfer Switch (STS) Three Phase

• Ultra-Fast Sub-20ms Transfer Time: Smoothly switches between on-grid, off-grid, and diesel generator modes in less than 20 ms, preventing power drops on sensitive commercial and industrial equipment.
  
• Independent 500 kW High-Power Paths: Dedicated Grid, Load, and GEN (Diesel Generator) ports each support a full 500 kW rated active power at 758 A / 725 A.
  
• Scalable Multi-PCS & Parallel Architecture: A single STS module integrates with up to five 100 kW PCS modules or four 125 kW PCS modules, while up to five STS modules can be paralleled via the STS AC Parallel Port for systems up to 2.5 MW.
  
• Passive Natural Cooling Design: Engineered with natural cooling for silent, high-reliability operation with reduced mechanical maintenance.
  
• Industrial-Grade Protection & Standards Compliance: Built to Overvoltage Category III (OVC III) and IEC/EN 61439-1/-2 safety standards inside a sturdy IP20 indoor enclosure.
  

Basic Specs: Deye - Static Transfer Switch (STS) Three Phase

• SKU / Manufacturer Model: SUN-STSS500L (Manufacturer Model: SUN-STS500L)
  
• Rated AC Input / Output Active Power: 500 kW (Grid/PCS Side, Load Side, and GEN Side)
  
• Rated AC Input / Output Current: 758 A / 725 A
  
• Rated Input / Output Voltage: 220/380 V, 230/400 V (Three-Phase)
  
• Grid Connection Form: 3L/N/PE
  
• Rated Input / Output Grid Frequency: 50 Hz / 60 Hz
  
• Off-Grid Switching Time: less than 20 ms
  
• PCS Parallel Capacity: Up to 5 x 100 kW PCS or 4 x 125 kW PCS per STS (Max 5 STS in parallel up to 2.5 MW)
  
• Ingress Protection Rating: IP20
  
• Overvoltage Category: OVC III
  
• Cooling Method: Natural Cooling
  
• Dimensions (W x H x D): 543 x 575 x 671 mm
  
• Weight: 108 kg
  
• Safety & EMC Standards: IEC/EN 61439-1/-2
  

What’s Included: Deye - Static Transfer Switch (STS) Three Phase

• Deye 500 kW Three-Phase Static Transfer Switch Module (Model: SUN-STS500L)
  
• Integrated Grid, Load, GEN, PCS Connection, and STS AC Parallel Terminals
  
• Mounting Brackets and Installation Hardware
  
• User Manual and Commissioning Documentation
  

Why Choose AC Solar Warehouse for Deye - Static Transfer Switch (STS) Three Phase?

When sourcing the Deye - Static Transfer Switch (STS) Three Phase through AC Solar Warehouse, you benefit from industry-leading commercial solar and energy storage expertise, guaranteed authentic equipment, and dedicated technical service. AC Solar Warehouse offers end-to-end support for commercial installers—from pre-sale system design, single-line diagram review, and microgrid transfer compliance to on-site commissioning assistance. With established logistics infrastructure and dedicated engineering support, AC Solar Warehouse ensures your commercial BESS projects are delivered smoothly and backed by trusted industry professionals.