Multicluster Box SMA 138kW MC-Box-12.3-20 for Sunny Island
Modelo: MC-BOX-12.3-20- Sku: SMAACCE014
- Vendor: SMA
Specifications
Product description
The Multicluster Box SMA 138kW MC-Box-12.3-20 is a high-performance three-phase AC distribution box designed to connect up to 12 Sunny Island inverters of 48 V in four three-phase clusters. It offers a complete solution for hybrid systems, microgrids, and self-consumption projects with backup, with a rated power of up to 138 kW and multiple integrated protection functions.
Main features
- Connection of up to 12 Sunny Island inverters (4 three-phase clusters)
- Rated power of 138 kW AC
- Dedicated inputs for generator, PV, and main loads
- IP55 protection for outdoor use
- Prewired AC distribution with C40 circuit breakers and HRC fuses
Advantages or benefits
- Allows the construction of scalable and modular systems with cluster architecture
- Quick and safe installation thanks to factory wiring
- Operates in both off-grid and grid-connected systems (with NA-Box or Grid-Box)
- Includes reverse current protection and automatic generator bypass
- Ideal for projects with high demand and need for energy backup
Purpose or applications
The MC-Box-12.3-20 is perfect for three-phase systems in rural environments, businesses, communities, or industries that require reliable power supply. Its design facilitates the use of solar energy, batteries, and generators, in off-grid installations or grid-connected systems for optimized self-consumption and backup.
Technical specifications
| Nominal power | 138 kW |
| Nominal AC current | 3 × 200 A |
| Nominal voltage | 230 V / 400 V |
| Frequency | 50/60 Hz |
| Sunny Island inverters | Up to 12 (4 clusters of 3) |
| Generator input | 138 kW / 3 × 200 A |
| PV Input (AC coupling) | 138 kW / 3 × 200 A |
| IP Protection | IP55 |
| Dimensions | 1200 × 1600 × 435 mm |
| Weight | 200 kg |
| Mounting | Floor-mounted |
| Operating temperature | –25 °C to +60 °C |
| Relative humidity | 0–100% (non-condensing) |
| Certification | CE |
| Warranty | 5 years |
Compatibilities
This product is compatible with: SMA Sunny Island 6.0H-13, SMA Sunny Island 8.0H-13 (conditional compatibility, consult with SMA)
Multicluster Box SMA 138kW MC-Box-12.3-20 is a robust and versatile solution for demanding three-phase solar installations, requiring scalability, reliability, and advanced energy management. It optimizes the integration of batteries, PV, and generators with complete safety.
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Multicluster Box SMA 138kW MC-Box-12.3-20 for Sunny Island





