Epever STI200, STI300, STI700, STI500, STI1000 User Manual

User’s Manual

Before using the inverter, you need to read and save the

safety instructions.

STI SERIES

(STI200, STI300, STI500, STI700, STI1000)

Power Frequency

Pure Sine Wave Inverter

The information presented in this document does

not form part of any quotation or contract, is believed

to be accurate and reliable and may be changed without

notice.

CONTENTS

1. Introduction ................................................... 1

2. Important Safety Instructions ........................ 2

3. Inverter Operation ......................................... 4

4. Functions ....................................................... 5

5. Troubleshooting ........................................... 12

6. Maintenance and Warranty .......................... 13

7. Technical Specification ............................... 14

1

1. Introduction

Thanks for purchasing STI series inverter. The product is a pure sine
wave power frequency inverter which can convert 12/24/48Vdc to
220/230Vac 50Hz based on full digital and intelligent design. It features
high reliability, high efficiency, concise outline, full protection functions,
easy installation and operation. The inverter can be applied in many fields,
such as household appliances, electric tools and industrial devices etc,
especially for solar photovoltaic power system.

Features:

 Complete isolation-type inverter technology, noiseless output.
 Adoption of advanced SPWM technology, pure sine wave output.
 Dynamic current loop control technology to ensure inverter reliable

operation.

 Wide DC input voltage range.
 Excellent EMC design.
 Low output harmonic distortion(THD≤3%).
 LED indicators for input voltage range, load power range, normal

output & failure state.

 Optional energy saving mode.
 Electronic protect for reverse polarity.
 Extensive protections: short-circuit, overload, under/over input

voltage, over-temperature, and inverter‟s inner fault identification
protections.

 Wide working temperature range (industrial level).
 Continuous operation at full power.

2

2. Important Safety Instructions

As an AC power supply equipment, the inverter‟s output voltage is
with the same level as that of household power plug. Mind the AC output
terminals, or you may get an electric shock!

Attentions:
 Connect the DC input according to the requirement strictly. The

power inverter has a relatively wide input range, but too high or too
low input may cause problems even destroy the inverter. The surge
input voltage can‟t exceed 18V for the 12V inverters, 36V for 24V
inverters, 72V for 48V inverters, or the inverters will be damaged.

 Do not expose the inverter to humid, flammable, explosive or dust

environment.

 Keep the inverter out of children touch.
 Inverter input is recommended to connect to battery, the min.

capacity of battery(expressed in AH) should be calculated in the
following way: 5times of the rated power of the inverter/battery
voltage. If for testing purpose, user should select DC power supply
current at least twice greater than that of the inverter rated input to
keep inverter normal operation. Use DC power supply for testing
may cause the damage of the inverter.

 When the inverter works continuously, its surface may became very

hot, please make sure the air ventilation clearance around the inverter
is more than 10cm. Keep away from the material or device which
may suffer from high temperature when the inverter is working. Do
not install the inverter in airproof location and keep enough space
around the inverter.

 The wire connects between battery and inverter should be shorter

3

than 3m, the current density should be less than 3.5A/mm2 while the
output of inverter is fully loaded. If the wire longer than 3m, the
current density should be reduced.

 A fuse or breaker should be used between battery and inverter, the

value of fuse or switch should be twice of the inverter rated input
current.

 Do not connect the battery charger or similar devices to the input

terminal of the inverter.

 Do not put the inverter close to the flooded lead-acid battery because

the sparkle in the terminals may ignite the hydrogen released by the
battery.

 It‟s an off-grid inverter, if connect to the grid, the inverter may be

damaged.

 This inverter can only be used singly, parallel connection or in series

will damage the inverters.

 Do not attempt to repair the fault inverter yourself, otherwise it may

lead to a serious accident. Please contact the manufacture‟s engineer.

4

3. Inverter Operation

Connect the input and output terminals accurately. Turn on the
power using the ON / OFF switch on the front panel. In order to avoid the
protections resulted from the surge power, please turn on AC loads one by
one after the output of the inverter is normal. Please check it as below:

 Set the power switch to the „OFF‟ position.
 Insert the load‟s plug into the inverter‟s output outlet.
 Connect the battery („+‟ terminal with red line, „-‟with black line). Do

not connect them by contraries, or the power inverter will not work.

 Switch the inverter to ON and then turn on the loads one by one.

Check the operation state of both power inverter and loads. „Green‟

of the failure LED indicator means the state is normal.

 If there are different loads, it is suggested that turn on the load with

large startup current first, such as television, then turn on the load
such as lamp when the inverter works stable.

 If the failure LED indicator is „Red‟ and the buzzer alarms or no

output when you turn on devices, switch off the loads and power
inverter immediately. Check the system by referring to the
troubleshooting guide. Turn on the devices again according to the
operation methods after the failure is removed.

5

4. Functions

 DC Input Panel

 AC Output Panel

Protective

Grounding

Fan

Ventilatio

DC Input

Terminal
Negative

DC Input

Terminal

Positive

Fault

Indicator

AC Outlet

ON/OFF Switch

Saving Mode Switch

RS485

Port

Input Level

Indicator

Load Level

6

 The Optional Outlet
Australia/New Zealand

European

7

 Input Level: Display Input Voltages

LED Status

12V

24V

48V

RED Slow Blink

＜10.5

＜21

＜42

RED

10.5～11

21～22

42～44

ORANGE

11～12

22～24

44～48

GREEN

12～14.5

24～29

48～58

ORANGE Fast Blink

14.5～16

29～32

58～64

RED Fast Blink

＞16

＞32

＞64

 Load Level: Display AC Loads

LED Status

AC Load

ORANGE

＜20%

GREEN

20%～75%

RED

＞75%

RED Slow Blink

Overload

RED Fast Blink

Short Circuit

 Output & Fault Status

LED Status

Status

GREEN

Output Normal

RED Fast Blink

Overload or Short circuit, No Output

RED Slow Blink

Over or Low input voltage, No Output

ORANGE Fast Blink

Over temperature, No Output

RED

Inverter Fault, No Output

OFF

Power Off，No Output

8

 Alarms

Alarms

Status

Buzzer Sounds

Overload or Short circuit, No Output

Over or Low input voltage, No Output

Over temperature, No Output

Inverter Fault, No Output

The buzzer stops after 15S.

9

 Protections

Output Short Circuit Protection

The inverter switches off the output immediately when the
connecting load is short. Then it recovers the output automatically
after delaying 5 seconds for the first time, 10 seconds for the second
time, and 15 seconds for the third time. If the short circuit status still
remains when the inverter tries to recover for 3 times, you should
clear the load faults then restart the inverter manually.

Overload Protection

Overload

Character

125%

150%

200%

＞230%

Continuance

60S

10S

1.5S

＜0.2S

Recover 3 times

5 seconds for the first time, 10 seconds for the
second time, and 15 seconds for the third time

If the overload status still remains when the inverter tries to
recover for 3 times, you should reduce the loads then restart the
inverter manually.

Input Low Voltage Protection

The output is switched off when the input voltage is lower than
low voltage protect value, and the output is auto-switched on when
the input voltage reach low voltage recover value. User can also
manually restart the inverter to switch on output by the „ON/OFF

10

switch‟, when the input voltage is higher than low voltage protect
value.

12V

24V

48V

Low Voltage

Protect Value

10.5

21

42

Low Voltage

Recover Value

13

26

52

Input Over Voltage Protection

The output is switched off when the input voltage is higher than
over voltage shut off value, also the output is auto-switched on when
the input voltage drops below over voltage recover value.

12V

24V

48V

Over Voltage Shut

Off Value

16

32

64

Over Voltage

Recover Value

15

30

60

Fault Protection

The inverter will shut down when the output voltage is error or
when the inverter has inner fault.

11

Over Temperature Protection

The inverter will shut off when the internal temperature is
overheating. And it automatic restarts when the temperature recovers
to the normal level.

Electronic Protect for Reverse Polarity

The Electronic circuit works to protect the inverter from
damage while input reverse polarity. And the inverter will get right
while the input is right.

 Others

Saving Mode

When the switch is on “Saving” side, the inverter will enter into
the Saving Mode. It will shut off the output if the loads value is less
than 20VA. Then restart and detect the power of the load again after
10s. If the load is more than 20VA, the inverter will turn on the
output .Otherwise it will shut off output again. It cycles like this. So
please don‟t use the saving mode if the load is smaller than 20VA.

12

5. Troubleshooting

WARNING：

High voltage is inside the inverter, do not open or disassemble
it! Attempting to service the unit yourself may cause the risk of
electrical shock or fire!

Problem

Possible Cause

Solution

Input LED
blink, fault red
LED slow blink

Input voltage is
too high or too low

Measure the input voltage. The
inverter recovers when the
input becomes normal.

Load LED
blink, fault red
LED fast blink

Overload or load
short

Check out if the AC load is
within the rated power or
whether there is load short.

Fault orange
LED fast blink

Over temperature
inside the inverter

Improve the quality of
ventilation and do not block
the vents. Restart the inverter
when it is cool down.

Fault red LED

Inverter
abnormal

Remove all the connected
plugs then restart. If inverter
works well, please check the
load and line. If the LED
keeps red, the inverter has
inside faults and should be
returned to the factory

13

6. Maintenance and Warranty

The casing of the inverters may be cleaned regularly with a damp

cloth (not wet) to prevent accumulation of dust and dirt. The screws on
the DC input terminals must be tightened.

The warranty period of the inverter is 2 year since the date of

original shipping. Within the period, we will repair the products for free.
Return the defective with shipping cost prepaid. And provide proof of
purchasing date. We will pay the return shipping charges within warranty
period.

The warranty doesn‟t apply under the following conditions:

1. Damaged by accident, negligence, abuse, improper use

2. Input voltage exceed the nominal input voltage of inverter

3. Unauthorized modification or attempted repair

14

7. Technical Specification

 Technical Data

Types

STI200-12-220

STI200-12-230

STI200-24-220

STI200-24-230

Nominal Battery

Voltage

12V

24V

Input Voltage Range

10.5 ~16Vdc

21 ~32Vdc

No Load Consumption

≤4W

≤5W

Output Wave

Pure Sine Wave

Output Voltage

220Vac±3%

230Vac±3%

220Vac±3%

230Vac±3%

Continuous Power

200VA

Power 10 sec

300VA

Power 1.5 sec

400VA

Surge Power

640VA

Frequency

50Hz±0.2%

Distortion THD

≤ 3%( resistive load)

≤ 2%( resistive load)

Efficiency at Rated

Power

≥81%

≥85%

Max. Efficiency

≥88%

≥89%

Dimensions

314.5×166×100.8mm

Installation

200×154mm

Hole Size

Φ8mm

Net Weight

4.5kg

15

Types

STI300-12-220

STI300-12-230

STI300-24-220

STI300-24-230

Nominal Battery

Voltage

12V

24V

Input Voltage Range

10.5 ~16Vdc

21 ~32Vdc

No Load Consumption

≤5W

≤6W

Output Wave

Pure Sine Wave

Output Voltage

220Vac±3%

230Vac±3%

220Vac±3%

230Vac±3%

Continuous Power

300VA

Power 10 sec

450VA

Power 1.5 sec

600VA

Surge Power

960VA

Frequency

50Hz±0.2%

Distortion THD

≤ 3%( resistive load)

≤ 2%( resistive load)

Efficiency at Rated

Power

≥81%

≥87%

Max. Efficiency

≥90%

≥91%

Dimensions

314.5×166×100.8mm

Installation

200×154mm

Hole Size

Φ8mm

Net Weight

5.3kg

16

Types

STI500-12-220

STI500-12-230

STI500-24-220

STI500-24-230

Nominal Battery

Voltage

12V

24V

Input Voltage Range

10.5 ~16Vdc

21 ~32Vdc

No Load Consumption

≤5W

≤6W

Output Wave

Pure Sine Wave

Output Voltage

220Vac±3%

230Vac±3%

220Vac±3%

230Vac±3%

Continuous Power

500VA

Power 10 sec

750VA

Power 1.5 sec

1000VA

Surge Power

1600VA

Frequency

50Hz±0.2%

Distortion THD

≤ 5%( resistive load)

≤ 2%( resistive load)

Efficiency at Rated

Power

≥81%

≥87%

Max. Efficiency

≥91%

≥93%

Dimensions

324.5×186.6×111.8mm

Installation

200×174.6mm

Hole Size

Φ8mm

Net Weight

7.3kg

17

Types

STI700-24-220

STI700-24-230

Nominal Battery voltage

24V

Input Voltage Range

21 ~32Vdc

No Load Consumption

≤8.5W

Output Wave

Pure Sine Wave

Output Voltage

220Vac±3%

230Vac±3%

Continuous Power

700VA

Power 10 sec

1050VA

Power 1.5 sec

1400VA

Surge Power

2240VA

Frequency

50Hz±0.2%

Distortion THD

≤ 3%( resistive load)

Efficiency at Rated Power

≥87%

Max. Efficiency

≥93%

Dimensions

335×232×123.3mm

Installation

230×216mm

Hole Size

Φ8mm

Net Weight

9.4kg

18

Types

STI1000-24-220

STI1000-24-230

STI1000-24-220

STI1000-48-230

Nominal Battery

Voltage

24V

48V

Input Voltage

Range

21 ~32Vdc

42 ~64Vdc

No Load

Consumption

≤10W

≤12W

Output Wave

Pure Sine Wave

Output Voltage

220Vac±3%

230Vac±3%

220Vac±3%

230Vac±3%

Continuous

Power

1000VA

Power 10 sec

1500VA

Power 1.5 sec

2000VA

Surge Power

3200VA

Frequency

50Hz±0.2%

Distortion THD

≤ 3%( resistive load)

≤ 2%( resistive load)

Efficiency at
Rated Power

≥87%

≥89%

Max. Efficiency

≥93%

≥94%

Dimensions

373×232×123.3mm

Installation

260×216mm

Hole Size

Φ8mm

Net Weight

11.8kg

19

 Environmental Parameters

Working Temperature

-20℃~+50℃

Storage Temperature

-35℃~ +70℃

Humidity

< 95%(N.C.)

Altitude

< 5000 m (Derating to operate according to IEC62040 at

a height exceeding 1000 m)

 Others

Insulation Resistance

Between DC input terminals and metal case: ≥550MΩ;

Between AC output terminals and metal case: ≥550MΩ.

Dielectric Strength

Between DC input terminals and metal case:

Test voltage AC1500V, 1 minute

Between AC output terminals and metal case:

Test voltage AC1500V, 1 minute

Version No. : V1.2

BEIJING EPSOLAR TECHNOLOGY CO., LTD.
Tel: [phone]
Fax: [phone]
E-mail: [email protected]
Website: http://www.epsolarpv.com/