Sunny Central FLEX — modular power conversion system for PV and BESS
Country: Germany · Model: Sunny Central FLEX
The Sunny Central FLEX modular platform is assembled from AC/DC and DC/DC converters and works as a megawatt-class power conversion system. A sample configuration delivers 7.36 MW DC/AC plus 6 MW DC/DC for a solar plant with storage. It is used on large hybrid plants connected at medium voltage.
- Composition
- AC/DC and DC/DC converters
- Applications
- PV, PV+storage (DC/AC), stand-alone storage, Power2Gas
- Semiconductors
- SiC
- Functions
- grid-forming
Technical specifications
| Composition | AC/DC and DC/DC converters |
|---|---|
| Applications | PV, PV+storage (DC/AC), stand-alone storage, Power2Gas |
| Semiconductors | SiC |
| Functions | grid-forming |
| Example | 7.36 MW DC/AC + 6 MW DC/DC |
| More from the manufacturer’s documentation | |
| Datasheet version | UL (US): PCU Solar 6400 UL / 6720 UL / 7040 UL |
| PCU power at 35 °C / 50 °C | 6,400 / 5,760 kVA, 6,720 / 6,048 kVA, 7,040 / 6,336 kVA |
| Max. DC voltage | 1,500 V |
| MPP voltage range | 878–1,325 V to 962–1,325 V depending on model |
| Number of DC inputs | 36 or 48 |
| Max. DC:AC ratio | 200% |
| Max. DC current / short-circuit current | 2 × 3,720 A / 2 × 10,000 A |
| Nominal AC voltage (LV) | 600 / 630 / 660 V |
| Power factor | adjustable 0.8 overexcited to 0.8 underexcited |
| Max. efficiency | up to 99.4% |
| MV transformer | vector groups Dy11y11, YNd11d11, YNy0y0; KFAF cooling |
| MV voltage | 12–34.5 kV |
| Grid frequency | 60 Hz (57–63 Hz) |
| Total harmonic distortion | < 3% at rated power |
| Dimensions (L × W × H) | 12.2 × 2.4 × 2.9 m (40-foot high-cube container) |
| Weight | 23 t (depending on options) |
| Operating temperature | −25 °C to +55 °C (extended −40 °C to +55 °C) |
| Storage temperature | −40 °C to +70 °C |
| Sound pressure level | 65 dB(A) at 10 m / 50 dB(A) at 50 m |
| Degree of protection | NEMA 3R (IP54) |
| Inputs / outputs | 4 analog inputs, 12 digital inputs, 4 digital outputs |
| System Manager | up to 100 devices; Modbus TCP (SunSpec), DNP3, IEC 60870, IEC 61850, OPC UA, MQTT |
| Enclosure / roof color | RAL 9016 / RAL 7004 |
| Standards | UL 62109-1, UL 1741, UL 1741 SB, UL 1998, IEEE 1547, FCC Part 15 Class A; cybersecurity IEC 62443 |
| Customs codes (for reference) | |
| HS code | 8504.40 |
| UKTZED code (Ukraine) | 8504408400 (≤7.5 kVA); 8504408800 (>7.5 kVA) |
| CN code (EU) | 85044084 |
Specifications are taken from the manufacturer’s technical documentation. Updated . Customs codes are for reference only; the final code is determined at customs declaration for the specific model.
Description
One platform covers a pure PV plant, PV plus storage via DC/AC, stand-alone storage and Power2Gas projects. The converters are built on SiC semiconductors, with peak efficiency up to 99.4%. The platform supports grid-forming and can build the grid itself without an external voltage source. The module set is matched to each hybrid power plant. The block arrives in a 40-foot high-cube container of 12.2 × 2.4 × 2.9 m weighing about 23 t, together with a 12–34.5 kV MV transformer. The DC side takes up to 1,500 V on 36 or 48 inputs with a DC:AC ratio up to 200%. The System Manager handles up to 100 devices and talks Modbus TCP, DNP3, IEC 60870, IEC 61850, OPC UA and MQTT. The datasheet covers the UL version for the US at 60 Hz, so figures for a 50 Hz grid are confirmed separately.
How to choose
Pick the PCU version by output at the site summer temperature. The PCU Solar 6400 UL drops from 6,400 kVA at 35 °C to 5,760 kVA at 50 °C, and the 7040 UL from 7,040 to 6,336 kVA. The LV voltage of 600, 630 or 660 V and the transformer vector group Dy11y11, YNd11d11 or YNy0y0 follow the grid operator requirements. Without grid-forming or DC/DC battery coupling, a Sunny Central UP up to 4,600 kVA is simpler, and a stand-alone BESS can use the Sunny Central Storage UP-S up to 5,000 kVA.
Request a price and lead time
Sunny Central FLEX — modular power conversion system for PV and BESS. We reply within one business day.
Or email office@usk.ua or call +38 (044) 339-50-20.
FAQ
Which converters make up the Sunny Central FLEX?
AC/DC and DC/DC modules, for example 7.36 MW DC/AC plus 6 MW DC/DC in one plant.
Does the Sunny Central FLEX support grid-forming?
Yes, the SiC-based platform supports grid-forming and holds the grid without an external voltage source.
Where is the Sunny Central FLEX used?
In PV plants, PV plus storage, stand-alone storage and Power2Gas projects.
What medium voltage does the Sunny Central FLEX connect to?
The built-in MV transformer covers 12–34.5 kV with KFAF cooling. Vector groups are Dy11y11, YNd11d11 or YNy0y0.
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