SG1100–SG8800UD(-MV) — modular central inverter, 1,500 V, 1.1–8.8 MVA
Country: China · Model: SG1100–SG8800UD(-MV)
A modular 1,500 V DC central inverter built in sizes from 1,100 to 8,800 kVA, with full output held at 45 °C. It serves large ground-mounted PV plants, and the -MV version arrives on site as a ready medium-voltage station in a 20-ft container.
- AC power
- 1,100, 3,300, 4,400, 6,600, 8,800 kVA at 45 °C
- Max. efficiency
- up to 99% (three-level topology)
- -MV version
- 20-ft container with 0.63/10–35 kV transformer (ONAN)
- Protection rating
- inverter IP65, other parts IP54
Technical specifications
| AC power | 1,100, 3,300, 4,400, 6,600, 8,800 kVA at 45 °C |
|---|---|
| Max. efficiency | up to 99% (three-level topology) |
| -MV version | 20-ft container with 0.63/10–35 kV transformer (ONAN) |
| Protection rating | inverter IP65, other parts IP54 |
| Operating temperature | −35 to +60 °C |
| Weight | ≤ 8.5 t (SG1100UD-MV), 17.5–20 t (SG3300/4400UD-MV) |
| Customs codes (for reference) | |
| HS code | 8504.40 |
| UKTZED code (Ukraine) | 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
The power steps are 1,100, 3,300, 4,400, 6,600 and 8,800 kVA, rated at 45 °C, so a hot southern summer does not cut output. A three-level power stage reaches up to 99% efficiency, keeping conversion losses near one percent. The -MV version has a built-in 0.63/10–35 kV transformer with ONAN cooling, meaning oil and air circulate naturally with no fans or pumps. The 0.63 kV inverter output is stepped straight up to 10–35 kV, and the station connects to the line without a separate transformer substation. The inverter itself is rated IP65, the rest of the equipment IP54, with an operating range of −35 to +60 °C. The SG1100UD-MV station weighs up to 8.5 t and the SG3300/4400UD-MV 17.5 to 20 t, which sets the crane and foundation.
How to choose
Size the unit to the PV field and the grid connection, one SG8800UD replaces about twenty-five 352 kVA string inverters. Take the version without -MV when the site already has a transformer substation or one is designed separately. On uneven terrain with tables facing different ways, SG320/350HX string inverters at 1,500 V with 12–16 MPPTs are easier, since they track each string group. For plants of a few hundred kilowatts a central design is oversized, and the SG150CX at 150 kW or the SG75/110/125CX-P2 does the job.
Request a price and lead time
SG1100–SG8800UD(-MV) — modular central inverter, 1,500 V, 1.1–8.8 MVA. We reply within one business day.
Or email office@usk.ua or call +38 (044) 339-50-20.
FAQ
What is the efficiency of the SG8800UD?
Up to 99%, as the inverter uses a three-level topology.
What transformer is fitted in the SG-UD-MV?
An oil-filled 0.63/10–35 kV transformer with natural ONAN cooling, with the whole station built into a 20-ft container.
How much does the SG3300UD-MV station weigh?
17.5–20 t for the SG3300/4400UD-MV, while the SG1100UD-MV station weighs up to 8.5 t.
Up to what temperature does the SG4400UD deliver full power?
The whole range is rated at 45 °C. It operates from −35 to +60 °C, and the derating curve above 45 °C is in the maker's documentation.
What protection rating does the SG6600UD-MV have?
The inverter is IP65 and the rest of the station IP54, so it stands on an open pad with no building around it.
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