
MP-STS Series-3902
The China Moneypro STS Series is an advanced static transfer switch system designed for commercial and industrial energy storage installations. It enables precise control of inverters to seamlessly switch between grid‑connected and backup (off‑grid) power modes, ensuring continuous power supply to critical loads. The robust design supports generator integration and high load capacities, offering flexibility and efficiency in energy management for large‑scale projects.
Reliable Grid & Backup Power Switching Solution
The China Moneypro STS Series is an advanced static transfer switch system designed for commercial and industrial energy storage installations. It enables precise control of inverters to seamlessly switch between grid‑connected and backup (off‑grid) power modes, ensuring continuous power supply to critical loads. The robust design supports generator integration and high load capacities, offering flexibility and efficiency in energy management for large‑scale projects.
Seamless Transition Between Grid & Backup
Smooth On‑Grid / Off‑Grid Switching
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Enables seamless transitions between grid‑connected and off‑grid power modes when grid outages occur.
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In backup mode, critical loads are continuously supplied by solar and battery power.
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When grid power returns, the system smoothly reconnects to normal grid operation.
Benefits:
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Continuous power to essential loads without interruption.
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Minimizes downtime during grid fluctuations.
Robust & Flexible Power Integration
Supports Large Loads & Generators
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Designed to accommodate large inductive loads like heat pumps and high‑power motors.
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Supports generator integration for extended backup scenarios.
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Offers flexibility to interface with hybrid inverters and microgrid configurations.
Advantages:
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Reliable performance under diverse load conditions.
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Enhanced system flexibility with generator support.
Reliable & Durable Design
Built for Commercial & Industrial Environments
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Rugged cabinet‑based construction suitable for large energy storage systems.
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High protection rating (e.g., IP65) ensures reliable outdoor operation.
Benefits:
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Long‑term stability in demanding environments.
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Reduced maintenance with robust protective design.
Why Choose China Moneypro STS Series?
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Continuous Power Supply: Ensures seamless source switching for critical loads.
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UPS‑Level Support: Rapid transition between grid and backup power.
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Large Load Compatibility: Handles high‑power equipment and industrial loads.
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Generator Integration: Integrates easily with backup generators.
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Rugged Construction: Designed for commercial and industrial deployment.
Typical Applications
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Commercial & Industrial Energy Storage Systems — Seamless grid‑to‑backup transitions.
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Critical Load Protection — Continuous power for essential equipment.
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Microgrid & Hybrid Power Projects — Flexible integration with renewable sources.
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Generator‑Backed Backup Systems — Reliable long‑duration backup support.
FAQ – Common Questions
Q1: What is the purpose of the STS system?
The STS (Static Transfer Switch) provides seamless switching between grid‑connected and off‑grid/power backup modes, maintaining power to critical loads during outages.
Q2: How does STS ensure continuous power?
It precisely controls inverter transitions so that during grid failure, power is supplied from solar or battery sources with minimal interruption.
Q3: Can the STS work with generators?
Yes — the STS supports generator integration for extended backup capabilities.
Q4: Is STS suitable for high‑power loads?
Yes — it accommodates large loads such as heat pumps and industrial motors.
Q5: Can STS be deployed outdoors?
Yes — models are designed with high ingress protection (e.g., IP65) for reliable outdoor use.
Specifications
| Parameter | Specification |
|---|---|
| Model | GW125K‑STS‑G10 |
| Grid Side – Nominal Voltage (V) | 127 / 220, 220 / 380, 230 / 400, 240 / 415, 3L / N / PE |
| Grid Side – Voltage Range (V) | 114 ~ 280 (according to local standard) |
| Grid Side – Nominal Frequency (Hz) | 50 / 60 |
| Grid Side – Frequency Range (Hz) | 45 ~ 55 / 55 ~ 65 |
| Grid Side – Rated Current (A) | 210 |
| Grid Side – Max. Current (A) | 210 |
| Grid Side – Rated Power (kW) | 125.0 (75 @ 220V) |
| Grid Side – Max. Apparent Power (kVA) | 137.5 (75 @ 220V) |
| Back‑up Side – Nominal Voltage (V) | 127 / 220, 220 / 380, 230 / 400, 240 / 415, 3L / N / PE |
| Back‑up Side – Voltage Range (V) | 114 ~ 280 (according to local standard) |
| Back‑up Side – Nominal Frequency (Hz) | 50 / 60 |
| Back‑up Side – Frequency Range (Hz) | 45 ~ 55 / 55 ~ 65 |
| Back‑up Side – Rated Current (A) | 210 |
| Back‑up Side – Max. Current (A) | 210 |
| Back‑up Side – Rated Power (kW) | 125.0 (75 @ 220V) |
| Back‑up Side – Max. Apparent Power (kVA) | 137.5 (75 @ 220V) |
| Smart Port Side – Nominal Voltage (V) | 127 / 220, 220 / 380, 230 / 400, 240 / 415, 3L / N / PE |
| Smart Port Side – Voltage Range (V) | 114 ~ 280 (according to local standard) |
| Smart Port Side – Nominal Frequency (Hz) | 50 / 60 |
| Smart Port Side – Frequency Range (Hz) | 45 ~ 55 / 55 ~ 65 |
| Smart Port Side – Rated Current (A) | 210 |
| Smart Port Side – Max. Current (A) | 210 |
| Smart Port Side – Rated Power (kW) | 125.0 (75 @ 220V) |
| Smart Port Side – Max. Apparent Power (kVA) | 137.5 (75 @ 220V) |
| Inverter Side – Nominal Voltage (V) | 127 / 220, 220 / 380, 230 / 400, 240 / 415, 3L / N / PE |
| Inverter Side – Voltage Range (V) | 114 ~ 280 (according to local standard) |
| Inverter Side – Nominal Frequency (Hz) | 50 / 60 |
| Inverter Side – Frequency Range (Hz) | 45 ~ 55 / 55 ~ 65 |
| Inverter Side – Rated Current (A) | 210 |
| Inverter Side – Max. Current (A) | 210 |
| Inverter Side – Rated Power (kW) | 125.0 (75 @ 220V) |
| Inverter Side – Max. Apparent Power (kVA) | 137.5 (75 @ 220V) |
| On / Off Grid Transfer Time (ms) | < 4 |
| Operating Temperature Range (ºC) | -35 ~ +60 |
| Installation Type | Indoor / Outdoor |
| Relative Humidity | 0 ~ 100% |
| Type of Electrical Supply System | TN‑S, TN‑C, TN‑C‑S, TT |
| Stationary or Movable | Stationary |
| Type Of Short‑circuit Protective Device | Icc |
| Max. Operating Altitude (m) | 4000 |
| Cooling Method | Intelligent air cooling |
| Communication | RS485 |
| Weight (kg) | 21 |
| Dimensions (W × H × D mm) | 680 × 620 × 165 |
| Mounting Method | Wall Mounted |
| Noise Emission (dB) | 45 |
| Ingress Protection Rating | IP54 |



