All-in-One Solar Systems
Introduction to All-in-One Solar Systems
A modern, modular, and optimized solution for solar power plants
All-in-One Solar Systems represent a new generation of solar power plant equipment, designed with a modular, compact, and cost-effective approach. These systems integrate all the key components of a power plant, including inverter, LV and MV switchgear, and transformer, into a single structure. The system is available in two configurations: String and Central, tailored to suit solar projects from small scale up to utility-scale (megawatts). Using these systems results in space saving, reduced installation costs, easier transportation, and significantly shortens the commissioning time of the power plant.
Features and Technical Specifications of All-in-One Solar Systems
- Structure: Modular design for high flexibility in various projects
- Types: Available in both Central and String configurations
- Protection degree: MV switchgear IP54, Inverter IP65
- Thermal class: 0K suitable for hot climates
- Advantages: Reduced installation space, easy transport and commissioning, shorter delivery time
- Economic savings: Lower investment and operational costs
- Comprehensive engineering: Complete design including inverter, LV/MV switchgear, and transformer
Components of All-in-One Solar Systems
- Central Inverter: Converts DC from PV modules to AC with high efficiency, provides centralized management, and offers lower cost per watt for large-scale plants.
- String Inverter: Converts DC from each string of modules into AC, easy to install, smaller scale, suitable for small and medium solar plants.
- MV Switchgear: Switching, protection, and control of MV circuits with overload interruption and monitoring (AIS or GIS).
- LV Switchgear: Switching and protection of LV circuits, transferring AC output from inverters to the transformer.
- Transformer: Steps up LV output voltage to MV for grid connection, reduces losses, and improves transmission efficiency.
Power Range and Capacities
- String type: Suitable for plants from 400kW to 15MW – power range 400kVA to 2.5MVA at 20kV
- Central type: Suitable for plants above 10MW – power range 3.5MVA to 6.5MVA at 20kV
Applications of All-in-One Solar Systems
- Small, medium, and large-scale solar power plants
- Solar projects in areas with limited space
- Hybrid solar–wind power plants
- EPC projects requiring fast installation and short commissioning time
Advantages of All-in-One Solar Systems by Iran Transfo Substation Development
- Complete integration: All main equipment in one module
- Fast and easy installation: Reduced installation and commissioning time
- Space saving: Ideal for projects with limited space
- Cost reduction: Savings in initial investment and maintenance costs
- Flexibility: Option to choose between Central or String version depending on project needs
Technical Specifications of Integrated Solar Systems
| Model | All in One with String Inverter | All in One with Central Inverter |
|---|---|---|
| Input (DC) | ||
| Max. PV input voltage | Up to 1500V | Up to 1500V |
| Max. input current | Up to 8×12×45A | Up to 5,736A |
| MPP voltage range for nominal power | 880~1300V | 900~1300V |
| Number of MPPT trackers | Up to 8×12 | Up to 4 |
| Max. Number of DC inputs | Up to 8×24 (Optional: 28/32) | Up to 20 (Maximum: 32 inputs) |
| Output (AC) | ||
| AC output power | Up to 8×352kW@30°C / 8×320kW@40°C / 8×295kW@50°C | Up to 4400kW@45°C / 5060kW@25°C |
| AC voltage range | Up to ±24V | |
| Rated grid frequency/range | 50 Hz / ±5 Hz | |
| Output current harmonic (at nominal power) | <3% | <3% |
| DC current injection | <0.5% | <0.5% |
| Power factor at nominal power/range | >0.99 / 0.8 lagging to 0.8 leading | >0.99 / 0.8 lagging to 0.8 leading |
| Protection | ||
| DC input protection | Circuit Breaker | Load Break Switch + Fuse |
| AC output protection | Circuit Breaker | Circuit Breaker |
| AC MV output protection | (Load Break Switch + Fuse) or Circuit Breaker | Circuit Breaker |
| Over voltage protection | DC Type II / AC Type II | DC Type II / AC Type II |
| Leakage current monitoring | Yes | Yes |
| Grid monitoring / Ground fault monitoring | Yes / Optional | Yes / Yes |
| Insulation monitoring | Yes | Yes |
| Overheat protection | - | Yes |
| Night SVG function | - | Optional |
| Anti-PID function | - | Optional |
| Efficiency | ||
| Max. efficiency | 99.0% | 99.0% |
| EU efficiency | 98.8% | 98.7% |
| Transformer | ||
| Transformer rated power | Up to 2500kVA | Up to 5500kVA |
| Transformer max. power | Up to 2816kVA | Up to 6325kVA |
| LV/MV voltage | 0.8/20kV | 0.6 or 0.63/20 |
| Vector group | Dyn11 | Dyn11 |
| Transformer type | ONAN (Oil Natural Air Natural) | ONAN (Oil Natural Air Natural) |
| General Data | ||
| Auxiliary power supply | Up to 5kVA | Up to 5kVA, Optional: max. 40kVA |
| Protection level | Inverter: IP66; Others: IP54 | Inverter: IP65; Others: IP54 |
| Temperature | -30°C ~ +60°C | -30°C ~ +60°C |
| Allowed humidity (non-condensing) | 0~100% | 0~95% |
| Cooling method | Temperature controlled forced air cooling | Temperature controlled forced air cooling |
| Max. operating altitude | 1800m (standard) / >1800m (optional) | 1800m (standard) / >1800m (optional) |
| Display | - | Standard: LED indicator, Bluetooth + APP; Optional: Touch screen |
| Communication port | Standard: PLC, Optional: RS485 | Standard: RS485 / Ethernet, Optional: Optical fiber |
| Certificates and approvals | CE, IEC 62109, IEC 61727, IEC 61683, IEC 62116, IEC 60068, IEC 61000, IEC 60076, IEC 62271 | |
FAQ
- What is a mall-type substation?
- A mall-type or indoor substation is a compact power distribution unit designed for commercial buildings, shopping centers, and office towers.
- What type of transformer is used in this substation?
- Depending on the project, oil-immersed or dry-type (resin) transformers are used.
- Can these substations be installed in basements or indoor spaces?
- Yes, they are specifically designed for indoor use—such as basements, parking lots, or utility rooms.
- What are the key differences between mall-type substations and compact substations?
- Mall-type substations are optimized for indoor installation, with lower noise levels and more aesthetic, space-saving designs.
- Can these substations be customized?
- Absolutely. Iran Transfo provides tailored designs based on voltage, space constraints, and project-specific needs.