Battery inverter SMA Sunny Central Storage 3950 UP

Sunny Central Storage UP
Battery inverter for large scale storage systems

With power outputs up to 3960 kVA and system voltages up to 1500 VDC, SMA Sunny Central Storage enables more efficient and flexible system design for battery power plants.

A separate power supply and additional space are provided for installing client equipment. The intelligent OptiCool cooling system ensures smooth operation even in extreme ambient temperatures.

Effective
• Up to 4 inverters can be transported in one standard shipping container.
• Higher power density

Strong
• Intelligent OptiCool air cooling system for efficient cooling.
• Suitable for outdoor use in all climates around the world.

Flexible
• One device for all applications
• Stand-alone device or complete solution with medium voltage system SMA.

Universal
• Built-in battery communication
• Individual monitoring and control of inverters.
• Network management functions to support dynamic networking.
• Built-in voltage source for internal consumption and external loads.

Technical data SCS 3950 UP

Battery side (DC)
DC operating voltage range VDC: 1003V to 1500V.
Max. Direct current I DC, max.: 4750 A
Battery Connection Fuse Performance - Built-in Pre-Arc Limit Single DC Bus / Split DC Bus 12) 14): 10.75 mA²s / 8.0 mA²s
Single DC bus 36 connections per pole / split DC bus 12/12/12 connections per pole / single fused DC bus 22 connections per pole 15): ● / ○ / ○
DC connection: with terminal lug

AC side
AC power rating at 1200 V DC and cos φ =1.0 (at 25°C): 3960 kW
Apparent AC power at 1200 VDC (at 25°C / at 40°C / at 50°C) 3) 13): 3960 kVA / 3610 kVA / 3365 kVA
Max. Alternating current IAC, no more (at 25°C/at 40°C/at 50°C): 3320 A/3020 A/2820 A
Max. total harmonic distortion: <3% at rated power
Rated AC voltage / AC voltage range 1) 8): 690 V / 552 V to 759 V
AC Frequency/Range: 50Hz/47-53Hz
60 Hz / 57 Hz to 63 Hz
Min. AC terminal short circuit factor 9): > 2
Cos Phi at rated power/displacement Cos Phi adjustable 8) 10): from 1 / 0.0 for overexcitation to 0.0 for underexcitation
AC connection: with busbar system (three busbars, one for each line wire)

Efficiency
Max. efficiency 2): 98.8%

Protective devices
Input side disconnect point: DC load breaker
Output side disconnect point: circuit breaker alternating current
DC surge protection: Type I surge suppressor.
AC surge protection (optional): Surge suppressor, class I.
Lightning protection (according to IEC 62305-1): Lightning protection level III
Insulation monitoring: ●
Degree of protection: electronics/ducting/connection area (according to IEC 60529): IP54/IP34/IP34

Total information
Dimensions (W/H/D): 2815/2318/1588 mm
Weight: < 3700 kg
Self-consumption (max.4) / part load 5) / average 6)): < 8100 W / < 1800 W / < 2000 W
Self-consumption (standby): < 370 W
Internal (8.4 kVA transformer)/external auxiliary power supply: ● / ○
Noise level 7): 65.0 dB(A)
Operating temperature range (optional) 8): (-40°C) -25°C to 60°C
Temperature range (standby): −40°C to 60°C.
Temperature range (storage): −40°C to 70°C.
Max. permissible relative humidity (with/without condensation): 95% to 100% (2 months/year) / 0% to 95%
Maximum working altitude above MSL 8): 1000 m / 2000 m 11): ● / ○
Fresh air flow: 6500 m³/h

Functions
Mesh formation/black start ready: ○ / ○
Communication: Ethernet, Modbus Master, Modbus Slave
Communication with SMA Line Monitor (Transmission Media): Modbus TCP/Ethernet (FO MM, Cat-5)
Body/ceiling colour: RAL 9016/RAL 7004
Supply transformer for external loads: ○ (2.5 kVA)
Complies with standards and directives: CE, IEC/EN 62109-1/-2, AR-N 4110/4120, Arrêté du 23.04.08.
EMC Standards: IEC 61000-6-2, EN 55011, CISPR11, FCC Part 15 Class A.
Complies with quality standards and directives: VDI/VDE 2862 page 2, DIN EN ISO 9001.

Type designation SCS 3950 UP

● Standard Features ○ Advanced —Not available.
1) Below the rated AC voltage, the AC power is reduced in the same proportion.
2) Efficiency measured without internal power supply.
3) Full AC power at higher DC voltages on request.
4) Own consumption at nominal operation
5) Self-consumption at < 75% Pn at 25°C
6) Self-consumption averages from 5% to 100% Pn at 25°C.
7) Sound pressure level at a distance of 10 m.
8) Values ​​only apply to inverters. The permissible values ​​for SMA MV solutions from SMA can be found in the corresponding data sheets.
9) Short circuit ratio < 2 requires special SMA approval.
10) Max. Power values ​​(S/P/Q) may be requested depending on the specific project.
11) Earlier temperature derating and DC open circuit voltage reduction.
12) Battery short circuit disconnection should be performed on the battery side using an ultra-fast battery.
chain or group fuses, e.g. fuse type aR/aBat and DC time constant Tau (L/R) <= 1 ms
13) Depending on the reactive power ratio (cos φ), extended power reduction may occur.
14) Please check the manual for more information.
15) Fused DC input with optional 750A, 900A or 1250A fuses.