S4875G5 Solar Supply Unit User Manual V2.
Electrical Specifications
Item Specifications
Input
Operating voltage 90–440 V DC
Rated maximum input
22 A
current
Output
42–58 V DC,
Output voltage
rated voltage: 53.5/57 V DC
Maximum output power 4000 W
Efficiency Peak efficiency: ≥ 97.2% 4000W (200V DC~440V DC)
Output power and rated
4000W~1740W (200V DC~90V DC
Dimensions voltage
40.8 mm x 105 mm x 269 mm linear derating)
(H x W x D) MPPT tracking precision ≥ 99% (Pout > 400 W, MPPT mode,
(peak value) static tracking)
Weight ≤ 2.2 kg
Standby power consumption
≤ 1.5 W
Cooling mode Built-in fan (fan speed adjustable) at night
Protection
Input overvoltage protection 450–460 V DC
Product Overview
Input overvoltage recovery
The S4875G5 is a DC-DC converter that supports threshold
440–450 V DC
the maximum power point track (MPPT) function Input undervoltage
< 80 V DC
and provides 48 V DC output. It automatically protection
enables solar cells to work at the maximum Range: 56–60 V DC
power point of the output power curves, fully (configurable on the SMU)
• If overvoltage occurs inside the
utilizing solar energy. Output overvoltage SSU, the SSU locks out.
protection • The SSU shuts down when
external overvoltage occurs. After
Key Feature the external overvoltage is
• Supports hot swapping. eliminated, the SSU recovers.
• Supports CAN bus communication. Output current limiting
For details, see Figure 1.
• Supports voltage adjustment and current protection
limiting. The SSU can resist a long-time short
Output short-circuit
• Supports MPPT. protection
circuit and recover automatically
after the short circuit is rectified.
• Supports full digital control.
• Supports LED alarm display. The module supports
overtemperature protection and
• Complies with IEC/EN 62109-1. Overtemperature protection automatically recovers when the
• Complies with CISPR32, IEC 61000-4-2, IEC temperature is within the normal
range.
61000-4-3, IEC 61000-4-4, IEC 61000-4-5 ITU-T
K.44, and IEC 61000-4-6.
• Meets the RoHS standard. Other Specifications
Item Specifications
Environment Specifications Surge protection
Item Specifications ±5 kA in common mode,
Surge protection
±3 kA in differential mode
Operating –25°C to +75°C (can be started at–
temperature (TA) 40°C) Reliability
Storage MTBF > 500,000 hours (at 25°C)
–40°C to +75°C
temperature
Audible noise
Humidity 5%–95% RH (non-condensing)
Specifications ≤ 55 dB(A) (40°C)
≤ 5000 m (When the altitude ranges
IP rating
from 2000 m to 5000 m, the operating
Altitude Specifications IP20
temperature decreases by 1°C for each
additional 200 m.) Pollution level
Specifications PD2
1 Copyright © Huawei Technologies Co., Ltd. 2021. All rights reserved.
S4875G5 Solar Supply Unit User Manual V2.0
Output Feature Curves Port Description
Figure 1 Output feature curves Figure 4 SSU edge connectors
Figure 2 Output efficiency curves (Vin = 360 V DC,
TA = 25 °C) Table 1 Connector pin definition
Pin Definition Function
1–2 DC- Output 48 V–
3–5 PRE-CHARGE Pre-charge
6 PRESENT SSU in-position detection
7–8 DC+ Output 48 V+
9 P_ADJ Power identifying signal 1
10 N_ADJ Power identifying signal 2
11 AC_D2 Slot detection signal 2
12 AC_D1 Slot detection signal 1
13 CANL CANL
14 CANH CANH
15–16 PE Protective earthing
17–18 PV+ PV input+
19–20 PV- PV input–
Figure 3 Output power derating curve (TA = 25ºC)
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S4875G5 Solar Supply Unit User Manual V2.0
Transportation
• Only trained and qualified personnel are During transportation, the product must be
allowed to install or maintain the SSU. securely placed in a packing case. The packing
• The operating environment of this product case must comply with related international
should meet related specifications in the user standards and be printed with marks such as
manual. "Handle with care" and "Keep dry." The packing
• If the product is exposed to salt mist, dust, or
case containing the product can be transported
water mist, the product may become faulty, and
the resulting product exceptions or component by any means. The packing case must be
damage are beyond the warranty scope. protected against rains, snows, and mechanical
• To prevent burns, wear protective gloves and impact during transportation.
exercise caution when removing an SSU because
it may be hot as a result of continuous Storage
operation. Unused products must be stored in packing
cases and placed in a dry, well-ventilated
Installing an SSU
warehouse where the relative humidity is not
Figure 5 Removing an SSU
greater than 80% and no corrosive gas exists.
• In an indoor scenario, you are advised to power
on the SSU within seven days after unpacking. If
Step 1: Push the locking latch left. the SSU cannot be powered on in time, place it
Step 2: Pull out the handle and remove the SSU in an indoor environment that is dry and
from the subrack. without corrosive gas.
Figure 6 Installing an SSU • In an outdoor scenario, you are advised to
Figure 6 Installing an SSU power on the SSU within 24 hours after
unpacking. If the SSU cannot be powered on in
time, place it in an indoor environment that is
dry and without corrosive gas.
Step 1: Place a new SSU in the correct slot, push
the locking latch left, and pull out the Maintenance
handle.
Step 2: Gently push the SSU along the guide rails
• The high voltage power supply provides power
into the subrack, close the handle, and flip
for the equipment operation. Direct or indirect
the locking latch right to secure the
contact (especially with a damp object) with the
handle. high voltage power supply may result in fatal
injury.
• Non-standard and improper high-voltage
• The S4875G5 is applicable to indoor environments.
operations may result in accidents such as fire or
For the ventilation requirements, see the user
electric shock.
manual.
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S4875G5 Solar Supply Unit User Manual V2.0
Indicator Status
To rectify common faults, refer to Table 2.
Table 2 Indicator status and troubleshooting
Indicator Color State Description Suggestion
Steady
The SSU has PV input. Normal status
on
The SSU has no PV input or the
Check that the PV input voltage is
input cables are reversely
Off normal.
connected..
Power
Green
indicator The SSU is faulty. Replace the SSU.
Blinking The PV input is available, and the
(0.5 Hz) SSU is being queried. The SSU automatically recovers after
the loading is finished, and no action is
Blinking The PV input is available, and the required.
(4 Hz) SSU is loading software.
Off The SSU has no protection alarms. Normal status
An SSU overtemperature warning, Ensure that the ventilation vent is
high ambient temperature alarm, or unblocked and the ambient
low ambient temperature alarm temperature is within the normal
occurs. range.
Check whether the overvoltage or
An input overvoltage or
Steady undervoltage is caused by external
undervoltage alarm occurs.
on faults.
Alarm
Yellow The SSU is hibernating. Restart the SSU.
indicator
The module experiences startup Check whether the PV energy is
delay. normal.
Check whether the input voltage is
The input voltage type is abnormal.
correct.
Clean the edge connectors of the SSU.
Blinking If the indicator is still blinking, check
The SSU fails to communicate.
(0.5 Hz) whether the external communication
module is faulty.
Off The SSU is normal. Normal status
The SSU locks out due to output
Remove the SSU, wait for more than 1
overvoltage or the SSU is not
Fault Red Steady minute, and then insert the SSU.
properly inserted.
indicator on
The SSU has no output due to
Replace the SSU.
internal faults.
Suggestion
1.Rectify a fault by referring to Table 2.
2.If the fault persists, replace the SSU.
3.Return the faulty SSU to Huawei for repair.
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S4875G5 Solar Supply Unit User Manual V2.0
Description of module identifiers
Identifiers Description
High temperature on the surface of the
machine, be careful of burns.
Not as ordinary waste disposal, need to
go through a special way of recycling.
Read the manual carefully.
After power off, wait 1 minutes to
ensure that the machine is fully
discharged.
Huawei technical support website: Huawei Technologies Co., Ltd
http://support.huawei.com Huawei Industrial Base, Bantian, Longgang
Telephone: 4008302118
518129, People's Republic of China
www.huawei.com
