KEHUA TECH iStoragE Series User manual

iStoragE Series
Energy Storage System
Installation Guide

1
1.2 LED Indicator (Inverter)
Suitable model:
Inverter:
·iStoragE 3600
·iStoragE 5000
·iStoragE 6000
Battery:
·StoragE B8
1 Product Intro
1.1 Appearance
Status Illustration LED display
Inverter power off.
ON: inverter fault.
ON: the system works normally.
Flicker 1s: inverter alarm.
Flicker 3s: inverter standby.
OFF
Red
Blue
NOTE
If the floor of installation site is uneven, please use gaskets to keep the bottom of battery pack level.

1.3 LED Indicator (Battery pack)
iStoragE
With good ventilation
No dust
No flammable
or explosive
materials
No corrosive
material, salty or
flammable gas.
Tmax:60℃
Tmin:-25℃
RH:0%~95%
2.1 Installation Environment
2 Installation Preparation
Status
Blue
Red
Illustration
LED display
The first line of the LED indicator flashes every 10s.
Error
The first line of the LED indicator is always on.
When the SOC is less than 30% and the battery is being charged,
the first line of the LED indicator will flash every 3s.
The first and second line of the LED indicator are always on.
When the battery is being charged and 30%＜SOC≤55%,
the second line of the LED indicator will flash every 3s.
The first, second and third line of the LED indicator are always on.
When the battery is being charged and 55%＜SOC≤80%, the third
line of the LED indicator will flash every 3s.
All the LED indicators are always on.
When the battery is being charged and 80%≤SOC≤100%,
the fourth line of the LED indicator will flash every 3s.
\
SOC≤5%
5%≤SOC≤30%
30%＜SOC≤55%
55%＜SOC≤80%
80%≤SOC≤100%
2

Avoid direct sunlight Avoid rain Avoid snow
2.2 Installation Clearance
3
Unit: mm
≥100

2.3 Installation Method
3 Single Battery Installation
The battery is very heavy and needs to be transported and installed by auxiliary tools. There is a risk of injury if the
battery pack is not handled correctly when transporting the battery, attaching the battery pack to the wall bracket or
removing it from the wall bracket.
WARNING
4
Step1 Lift the battery pack using the handles at the two sides, place it to assigned site. Do not put
the battery pack upside down on the ground.
Obliquely forwards
Vertically Flat
90°
Obliquely backwards
≤15°

Step4 Drill two holes (Diameter: Φ10mm, depth: 70mm).
Step5 Attach the battery wall bracket to the wall using the screws.
5
Step3 Mark the drilling position.
Step2 Determine the installation site based on the inverter size and installation clearance.

Step6 Install the battery support rack with two screws M5.
Step7 Place the battery against the wall, align the holes at the battery side to the screw holes
of the wall bracket.
Step8 Fasten the battery pack.
6
NOTE
If the floor of installation site is uneven, please use gaskets to keep the bottom of battery pack level.
Unit: mm
Rear

4 More Batteries Installation
4.1 Column installation
7
You can install extra batteries up to 6 batteries in a system.
Please install extra batteries one by one, also batteries can be stacked up to two batteries per column.
After the battery pack is installed, clean up the excess wires, foam, cardboard boxes and other useless
items.
CAUTION
Step1 sRepeat ingle battery installation step1~step6.
Step2 Tighten the battery cover plate of each battery with three screws M4.
Step3 Place the battery against the wall, align the holes at the battery side to the screw holes
of the wall bracket.
Step4 Fasten the battery pack.
NOTE
If the battery directly connected to the inverter, it doesn't need the battery cover plate.

4.2 Stack installation
Step5 Install extra batteries one by one, keep the distance between the batteries about
300mm.
Step1 sRepeat ingle battery installation step1~step6.
Step2 Tighten the battery cover plate of each battery with three screws M4.
Step3 Place the battery against the wall, align the holes at the battery side to the screw holes
of the wall bracket.
Step4 Fasten the battery pack.
8
NOTE
If the battery directly connected to the inverter, it doesn't need the battery cover plate.

Step5 After install the single battery, then lock the four screws M6 on top of the below battery
pack.
Step6 Place the battery positioning paper against the wall and the bottom with notch against
the below battery pack, and mark the positions of the two drill holes.
9

10
Step7 sRepeat ingle battery installation step4~step6.
Step8 Place the battery against the wall, the bottom limit holes of the upper battery pack
should match the screw on the top of the below battery pack.
Step9 Tighten the wall bracket and the battery pack with screw M5.
Step10 Install extra batteries one by one, keep the distance between the batteries about
300mm.

5 Inverter Installation
11
Step3 Mark the positions of the drill holes on the paper plate.
Step2 Align the bottom of the inverter's positioning paper with the notch of the battery top.
Step1 sRepeat ingle battery installation step1~step8.
⑤
⑥

Unit: mm
Step5 Attach the wall bracket to the wall using seven M5 self-tapping screws with the tool of
screwdriver.
Step6 Hold the inverter using the handles at two sides, attach the inverter onto the wall
bracket tilted slightly downwards.
Step7 Tighten the inverter with screw M6.
40-45mm
8mm
Step4 Cover the top of the battery with plastic bag and drill seven holes (Φ8, depth range:
40~45mm), insert seven expansion plugs (8*40) into the drill holes.
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6 Electrical Connection
6.1 Bottom layout
⑫
⑩
⑪
① Meter1/ Meter2
③ BMS
② DRM
⑦ WIFI port
⑨ Grid output terminal
⑧ Explosion-proof valve
⑤ BATT+/BATT-
④ Parall1/Parall2 (reserved)
⑥ Grounding port
⑪ DC input terminal
⑩ Backup output terminal
⑫ DC switch
① Battery input terminal
② Communication port
③ External grounding terminal
④ Breaker
⑤ Screw
⑥ ON/OFF button
6.2 Wire Specification
Wire name
Battery power cable
Battery communication cable
Signal cable
PV power cable
AC power cable
PE cable
6mm²10mm²~
Recommended cross-sectional area of wire
4 mm²
0.12~0.2 mm (AWG26~AWG24)²
(For CAN/RS485, Meter, DRM communication connection with inverter.)
4~6 mm²
4~10 mm²
0.12~0.2 mm (AWG26~AWG24)²
13

6.4 External Grounding Connection
Step1 Crimp the grounding wire.
Step2 connectionExternal grounding terminal of inverter and battery pack.
7
OT terminalHeat shrink tubingGrounding wire
Unit: mm
NOTE
Each battery pack can be connected to ground separately, or connected to ground after being connected in series.
Inverter grounding B grounding attery
14
Component
PV DC switch
Circuit breaker
for AC
Circuit breaker
for backup
RCD
23A
Specification
20A for 3600VA, 25A for 5000VA, 32A for 6000VA
Type B 30mA, <0.3S
32A for 3600VA, 50A for 5000VA, 63A for 6000VA
Scope of supply
Integrated in the inverter (optional)
Purchased by the installer
Purchased by the installer
Purchased by the installer
6.3 SpecificationIsolator, Overcurrent Protection Device and RCD

6.5 DC Input (PV) Connection
·When installation, it must use the equipped DC terminals to avoid inverter damage.
·It is recommended to use independent switch for each PV input, and before connecting, the switches must be off.
We suggest to use the special DC switch (rated voltage is 600V, rated current is more than 20A).
·Switch off the DC switch and external DC switches before connecting the PV array.
·Ensure that the connection between PV array and the inverter at positive pole and negative pole is correctly.
·The DC input voltage should be less than the max. input voltage of the inverter.
·It's forbidden to connect the grounding wire with positive pole or negative pole of PV array, or it will lead to
inverter damage.
CAUTION
NOTE
 There are three pairs of DC connectors. one pair of blue DC connectors is used to connect to battery and two pairs of black
DC connectors are used to connect to PV.
 Among six magnetic rings, there are three snap magnetic rings (two on the PV side and one on the battery input side). The
smallest magnetic ring is connected to communication port according to manual operation instructions, and the remaining
two magnetic rings are connected in AC wiring cover.
Step1 Prepare PV connector.
Fix
Strip wires(unit: mm)
+
-
7
Crimp the metal terminals
-
+
-
+
-
+
15

Step2 Measure the voltage and check if the positive and negative is connected properly and if the
voltage within the input range of the inverter.
888.8
+
-
Measure the voltage of PV string＜580V
Step3 Connect the PV connectors (black).
6.6 DC Input (Battery) Connection
Connect the BAT connectors (blue).
16

Battery pack expansion:
Step1 Connect the power cables and BMS communication cable between the two batteries.
Stack installation Column installation
Step2 Install the terminal resistance to any one of COM ports of the first battery.
17

6.7 AC Output Connection
·It's forbidden that several inverters shares an AC switch.
·It's forbidden to connect with load between inverter and AC switch.
CAUTION
Step1 Strip the AC output wire.
To ensure the inverter can be disconnected with load safely, we suggest equipping independent dipolar
switch (as below) for each inverter to protect the inverter.
Model
iStoragE 3600
iStoragE 5000
iStoragE 6000
32A
AC input specification (GRID)
63A
50A
20A
AC output specification (BACKUP)
32A
25A
During wiring, please pay attention to distinguish the AC live wire, neutral wire and grounding wire.
CAUTION
90°terminal
Heat shrink tube
L/N/PE
7
L
N
PE Unit: mm
NOTE
It is recommended to use brown or red wire as the live wire, use blue or white wire as neutral wire and use yellow-green wire as PE wire
to avoid wrong connection. If using the wires of other color, please confirm the corresponding connection relationship.
Step2 Crimp the AC output wire.
18

Step3 Unscrew the lock nut, lead the live wire, neutral wire go through the lock nut, and then connect
them to the corresponding port of AC terminal (draw the live wire and neutral wire connected
to grid through the two magnetic rings).
Step4 Tighten terminals one by one with tool of screwdriver.
NOTE
AC output wiring N short connection is only applicable to Australia and New Zealand, other countries do not need to short circuit.
There is L, N, PE mark on the AC connector, the wire connection must be accord with the mark correspondingly.
CAUTION
Step5 Screw the AC wiring cover to the inverter, and then tighten the two nylon cable glands with
tool of screwdriver.
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