opti-solar Premium SP20000 User manual

Solar Hybrid 3Phase PV Inverter
SP20000 Premium
Version: 1.0
User Manual

Table f Contents
1. Introduction .......................................................................................... 1
2. Important Safety Warning...................................................................... 2
3. Unpacking & Overview .......................................................................... 4
3-1. acking List ................................................................................... 4
3-2. roduct Overview .......................................................................... 4
4. Installation ........................................................................................... 5
4-1. reparation ................................................................................... 6
4-2. Unit Installation ............................................................................. 6
5. Grid (Utility) Connection ........................................................................ 7
5-1. reparation ................................................................................... 7
5-2. Connecting to the AC Utility ........................................................... 7
6. V Module (DC) Connection ................................................................... 8
7. Battery Connection ............................................................................... 10
8. Load (AC Output) Connection ............................................................... 11
8-1. reparation .................................................................................. 11
8-2. Connecting to the AC output ......................................................... 11
9. Communication .................................................................................... 12
10. Dry Contact Signal ............................................................................... 13
10-1. Electric arameter ...................................................................... 13
11. Commissioning ..................................................................................... 14
12. Initial Setup ......................................................................................... 15
13. Operation ............................................................................................ 27
13-1. Interface .................................................................................... 27
13-2. LCD Information Define .............................................................. 27
13-3. Button Definition ........................................................................ 28
13-4. Query Menu Operation ................................................................ 29
13-5. Operation Mode & Display ........................................................... 32
14. Charging Management ......................................................................... 37
15. Maintenance & Cleaning ....................................................................... 38
16. Trouble Shooting .................................................................................. 39
16-1. Warning List ............................................................................... 39
16-2. Fault Reference Codes ................................................................ 40
17. Specifications ....................................................................................... 42

1
1. Introduction
This inverter can provide power to connected loads by utilizing V power, utility power
and battery power.
Figure 1 Basic hybrid PV System verview
Depending on different power situations, this inverter is designed to generate continuous
power from V solar modules (solar panels), battery, and the utility. When M input
voltage of V modules is within acceptable range (see specification for the details), this
inverter is able to generate power to feed the grid (utility) and charge battery. This
inverter is only compatible with V module types of single crystalline and poly crystalline.
Do not connect any V array types other than these two types of V modules to the
inverter. Do not connect the positive or negative terminal of the solar panel to the
ground. See Figure 1 for a simple diagram of a typical solar system with this inverter.
Note: By following the EEG standard, every inverter sold to German area is not allowed
to charge battery from Utility. The relevant function is automatically disabled by the
software.
V module
Battery
S 20000 remium
Distribution Box
Electric grids
Load

2
Conventions used:
WARNING! Warnings identify conditions or practices that could result in personal
injury;
CAUTI N! Caution identify conditions or practices that could result in damaged to the
unit or other equipment connected.
2. Important Safety Warning
Before using the inverter, please read all instructions and cautionary
markings on the unit and this manual. Store the manual where it can be
accessed easily.
This manual is for qualified personnel. The tasks described in this manual may be
performed by qualified personnel only.
General Precaution-
WARNING! Before installing and using this inverter, read all instructions and cautionary
markings on the inverter and all appropriate sections of this guide.
WARNING! Normally grounded conductors may be ungrounded and energized when a
ground fault is indicated.
WARNING! This inverter is heavy. It should be lifted by at least two persons.
CAUTI N! Authorized service personnel should reduce the risk of electrical shock by
disconnecting AC, DC and battery power from the inverter before attempting any
maintenance or cleaning or working on any circuits connected to the inverter. Turning off
controls will not reduce this risk. Internal capacitors can remain charged for 5 minutes
after disconnecting all sources of power.
CAUTI N! Do not disassemble this inverter yourself. It contains no user-serviceable
parts. Attempt to service this inverter yourself may cause a risk of electrical shock or fire
and will void the warranty from the manufacturer.
CAUTI N! To avoid a risk of fire and electric shock, make sure that existing wiring is in
good condition and that the wire is not undersized. Do not operate the Inverter with
damaged or substandard wiring.

3
CAUTI N! Under high temperature environment, the cover of this inverter could be hot
enough to cause skin burns if accidentally touched. Ensure that this inverter is away
from normal traffic areas.
CAUTI N! Use only recommended accessories from installer. Otherwise, not-qualified
tools may cause a risk of fire, electric shock, or injury to persons.
CAUTI N! To reduce risk of fire hazard, do not cover or obstruct the cooling fan.
CAUTI N! Do not operate the Inverter if it has received a sharp blow, been dropped, or
otherwise damaged in any way. If the Inverter is damaged, please call for an RMA
(Return Material Authorization).
CAUTI N! AC breaker, DC switch and Battery circuit breaker are used as disconnect
devices and these disconnect devices shall be easily accessible.
Symbols used in Equipment Markings
Refer to the operating instructions
Caution! Risk of danger
Caution! Risk of electric shock
Caution! Risk of electric shock. Energy storage timed
discharge for 5 minutes.
Caution! Hot surface
Before working on this circuit
-Isolate inverter/Uninterruptible ower System (U S)
-Then check for Hazardous Voltage between all
terminals including the protective earth.
Risk of Voltage Backfeed

4
3. Unpacking & verview
3-1. Packing List
Before installation, please inspect the unit. Be sure that nothing inside the package is
damaged. You should have received the following items inside of package:
Software CD Manual USB cable RS-232 cable
3-2. Product verview
1) V connectors
2) AC Grid connectors
3) Battery connectors
4) AC output connectors (Load
connection)
5) RS-232 communication port
6) USB communication port
7) Intelligent slot
8) Grounding
9) LCD display panel ( lease check
section 13 for detailed LCD
operation)
10) Operation buttons
11) Dry contact for output (reserved)
12) Dry contact for input (reserved)

5
4. Installation
Then, follow below steps to remove the U S from the carton and pallet.
Step 1: Remove carton and foams Step 2: Remove fixing plates on the two
sides of the inverter as shown in the chart.
After removing fixing plates, please put
#screws back to inverter.
Step 3: Take off front foot of the pallet Step 4: Then, lean the pallet to remove
by removing screws as shown in chart. the inverter from the pallet.
N TE: Before installation, please inspect the unit. Be sure that nothing inside the
package is damaged during transportation. Do not turn on the unit and notify the
carrier and dealer immediately if there is any damage or lacking of some parts.
lease keep the original package in a safe place for future use.

6
4-1. Preparation
Before connecting all wirings, please take off three covers by removing 4 CS screws as
shown
4-2. Unit Installation
Consider the following points before selecting where to install:
It’s requested to have a clearance of
approx. 80 cm to the front and back
of the unit and approx. 50 cm to the
side.
Dusty conditions on the unit may
impair the performance of this
inverter.
The ambient temperature should be
between 0°C and 55°C to ensure
optimal operation.
For proper operation, please use appropriate cables.

7
Ring terminal:
5. Grid (Utility) Connection
5-1. Preparation
N TE 1: The overvoltage category of the AC input is III. It should be connected to the
power distribution.
N TE 2: The inverter is built in a 63A/400V breaker to protect the inverter from AC
power damage.
WARNING! It's very important for system safety
and efficient operation to use appropriate cable
for grid (utility) connection. To reduce risk of injury,
please use the proper recommended cable size as below.
Suggested cable requirement for AC wire
Model
Typical
Amperage
Cable
Size
Ring Terminal
Torque
Value
Cable mm
2
Dimensions
D (mm)
L (mm)
S 20K remium
40A 8AWG 8 5.3 23.8 2.0~2.4Nm
5-2. Connecting to the AC Utility
1. Before making AC input connection, be sure to open DC protector or disconnector
first.
2. Remove the terminal screws.
3. Insert the ring terminal of AC input wires flatly into AC input connector according to
polarities indicated on terminal block and tighten the terminal screws. Be sure to
connect E protective conductor ( ) first.
→Ground (yellow-green)
R Phase→LINE (black)
S Phase→LINE (gray)
T Phase→LINE (brown)
N→Neutral (blue)
CAUTI N: To prevent risk of electric shock, ensure the ground wire is properly earthed
before operating this inverter no matter the grid is connected or not.

8
Ring terminal:
6. PV Module (DC) Connection
CAUTI N: Before connecting to V modules, please install separately a DC circuit
breaker between inverter and V modules.
N TE 1: lease use 1000VDC/20A circuit breaker.
N TE 2: The overvoltage category of the V input is II.
lease follow below steps to implement V module connection:
WARNING! It's very important for system safety and
efficient operation to use appropriate cable for V module
connection. To reduce risk of injury, please use the proper
recommended cable size as below.
Model Typical
Amperag
e
Cab
le
Siz
e
Ring Terminal Torque
Value
Cable
mm
2
Dimensions
D (mm) L (mm)
S 20K remium 60A 6A
WG
14 5.3 29.2 2.0~2.4Nm
Step 1: Check the input voltage of V array modules. The acceptable input voltage of the
inverter is 350VDC - 900VDC. This system is only applied with two strings of V array.
lease make sure that the maximum current load of each V input connector is 18.6A.
CAUTI N: Exceeding the maximum input voltage can destroy the unit!! Check the
system before wire connection.
WARNING: Because this inverter is non-isolated, only three types of V modules are
acceptable: single crystalline, poly crystalline with class A-rated and CIGS modules.
To avoid any malfunction, do not connect any V modules with possibility of leakage
current to the inverter. For example, grounded V modules will cause leakage current to
the inverter. When using CIGS modules, please be sure NOT grounding.
CAUTI N: It’s requested to have V junction box with surge protection. Otherwise, it
will cause inverter damage when lightning occurs on V modules.

9
Step 2: Insert the ring terminal of V wires flatly into V connector according to
polarities indicated on terminal block and tighten the terminal screws.
RED cable to the positive terminal (+)
BLACK cable to the negative terminal (-)
Recommended Panel Configuration
Solar Panel
Spec.
(reference)
- 250Wp
- Vmp: 36.7Vdc
- Imp: 6.818A
- Voc: 44Vdc
- Isc: 7.636A
- Cells: 72
S LAR INPUT 1 S LAR INPUT 2
Q'ty of
panels
Total
Input
Power
(Min in serial: 11pcs;
Max. in serial: 18pcs)
11pcs in serial x 11pcs 2750W
x 11pcs in serial 11pcs 2750W
11pcs in serial 11pcs in serial 22pcs 5500W
11pcs in serial,
2 parallel x 22pcs 5500W
x 11pcs in serial,
2 parallel 22pcs 5500W
18pcs in serial 18pcs in serial 36pcs 9000W
14pcs in serial,
2 parallel 14pcs in serial 42pcs 10500W
18pcs in serial,
2 parallel 18pcs in serial 54pcs 13500W
15pcs in serial,
2 parallel
15pcs in serial,
2 parallel 60pcs 15000W
CAUTI N: Do NOT touch the inverter to avoid electric shock. When V modules are
exposed to sunlight, it may generate DC voltage to the inverter.
CAUTI N: Never directly touch terminals of the inverter. It will cause lethal electric
shock.

10
Ring terminal:
7. Battery Connection
CAUTI N: Before connecting to batteries, please install separately a DC circuit
breaker between inverter and batteries.
N TE 1: lease only use sealed lead acid battery, vented and Gel battery. lease check
maximum charging voltage and current when first using this inverter. If using Lithium
iron or Nicd battery, please consult with installer for the details.
N TE 2: lease use 60VDC/300A circuit breaker.
N TE 3: The overvoltage category of the battery input is II.
WARNING! It's very important for system safety and
efficient operation to use appropriate cable for battery
connection. To reduce risk of injury, please use the
proper recommended cable size as below.
Model
Typical
Amperage
Cable
Size
Ring Terminal
Torque
Value
Cable mm
2
Dimensions
D (mm)
L (mm)
S 20K remium 50A 8AWG
8 5.3 23.8 2.0~2.4Nm
lease follow below steps to implement battery connection:
Step 1: Check the nominal voltage of batteries. The nominal input voltage for inverter is
48VDC.
Step 2: Insert the ring terminal of battery wires flatly into battery connector according to
polarities indicated on terminal block and tighten the terminal screws.
RED cable to the positive terminal (+)
BLACK cable to the negative terminal (-)
WARNING! Wrong connections will damage the unit permanently.

11
Ring terminal:
8. Load (AC utput) Connection
8-1. Preparation
CAUTI N: To prevent further supply to the load via the inverter during any mode of
operation, an additional disconnection device should be placed on in the building wiring
installation.
WARNING! It's very important for system safety
and efficient operation to use appropriate cable for
AC connection. To reduce risk of injury, please use
the proper recommended cable size as below.
Model
Typical
Amperage
Cable
Size
Ring Terminal
Torque
Value
Cable mm
2
Dimensions
D (mm)
L (mm)
S 20K remium 40A 8AWG
8 5.3 23.8 2.0~2.4Nm
8-2. Connecting to the AC output
1. Before making AC output connection, be sure to open DC protector or disconnector
first.
2. Remove the terminal screws.
3. Insert the ring terminal of AC input wires flatly into AC input connector according to
polarities indicated on terminal block and tighten the terminal screws. Be sure to
connect E protective conductor ( ) first.
→Ground (yellow-green)
R Phase→LINE (black)
S Phase→LINE (gray)
T Phase→LINE (brown)
N→Neutral (blue)
CAUTI N: It’s only allowed to connect load to “AC Output Connector”. Do NOT connect
the utility to “AC Output Connector”.
CAUTI N: Be sure to connect L terminal of load to L terminal of “AC Output Connector”
and N terminal of load to N terminal of “AC Output Connector”. The G terminal of “AC
Output Connector” is connected to grounding of the load. Do NOT mis-connect.

12
9. Communication
The inverter is equipped with several communication ports and it is also equipped with a
slot for alternative communication interfaces in order to communicate with a C with
corresponding software. This intelligent slot is suitable to install with SNM card and
Modbus card. Follow below procedure to connect communication wiring and install the
software.
For RS232 port, you should use a DB9
cable as follows:
For USB port, you should use a USB cable
as follows:
For SNM or MODBUS card(optional), you
should use RJ45 cables as follows:
lease install monitoring software in your computer. Detailed information is listed in the
next chapter. After software is installed, you may initial the monitoring software and
extract data through communication port.

13
10. Dry Contact Signal
There is one dry contact available on the back panel. It could be used to remote control
for external generator.
10-1. Electric Parameter
arameter Symbol Max. Unit
Relay DC voltage Vdc 30 V
Relay DC current Idc 1 A
Note: The application of the dry contact should not exceed the electric parameter
shown as above. Otherwise, the internal relay will be damaged.

14
11. Commissioning
Step 1: Check the following requirements before commissioning:
Check if the open circuit DC voltage of V module meets requirement (Refer to
Section 6)
Check if the open circuit utility voltage of the utility is at approximately same to
the nominal expected value from local utility company.
Check if connection of AC cable to grid (utility) is correct if the utility is required.
Full connection to V modules.
AC circuit breaker (only applied when the utility is required), batter circuit breaker,
and DC circuit breaker are installed correctly.
Step 2: Switch on the battery circuit breaker and then switch on V DC breaker. After
that, if there is utility connection, please switch on the AC circuit breaker. At this moment,
the inverter is turned on already. However, there is no output generation for loads. Then:
If LCD lights up to display the current inverter status, commissioning has been
successfully. After pressing “ON” button for 1 second when the utility is detected,
this inverter will start to supply power to the loads. If no utility exists, simply press
“ON” button for 3 seconds. Then, this inverter will start to supply power to the
loads.
If a warning/fault indicator appears in LCD, an error has occurred to this inverter.
lease inform your installer.
Step 3: lease insert CD into your computer and install monitoring software in your C.
Follow below steps to install software.
1. Follow the on-screen instructions to install the software.
2. When your computer restarts, the monitoring software will appear as shortcut icon
located in the system tray, near the clock.
N TE: If using modbus card as communication interface, please install bundled
software. Check local dealer for the details.

15
12. Initial Setup
Before inverter operation, it’s required to set up “Operation Mode” via software. lease
strictly follow below steps to set up. For more details, please check software manual.
Step 1: After turning on the inverter and installing the software, please click “Open
Monitor” to enter main screen of this software.
Step 2: Log in into software first by entering default password “administrator”.
Step 3: Select Device Control>>My ower Management. It is to set up inverter
operation mode and personalized interface. Refer to diagram below.
Mode
There are three operation modes: Grid-tie with backup, Grid-Tie and Off-Grid.
Grid-tie with backup: V power can feed-in back to grid, provide power to
the load and charge battery. There are four options available in this mode:
Grid-tie with backup I, II, III and IV. In this mode, users can configure V
power supply priority, charging source priority and load supply source priority.
However, when Grid-tie with backup IV option is selected in V energy supply
priority, the inverter is only operated between two working logics based on
defined peak time and off-peak time of electricity. Only peak time and off-
peak time of electricity are able to set up for optimized electricity usage.
Grid-Tie: V power only can feed-in back to grid.
Off-Grid: V power only provides power to the load and charge battery. No
feed-in back to grid is allowed.

16
SECTI N A:
Standard: It will list local grid standard. It’s requested to have factory password to
make any modifications. lease check local dealer only when this standard change
is requested.
CAUTI N: Wrong setting could cause the unit damage or not working.
Nominal Output Voltage: 230V.
Nominal Output Frequency: 50HZ.
SECTI N B:
This section contents may be different based on different selected types of
operations.
Allow AC charging duration: It’s a period time to allow AC (grid) to charge battery.
When the duration is set up as 0:00-00:00, it means no time limitation for AC to
charge battery.
AC output ON/Off Timer: Set up on/off time for AC output of inverter. If setting it
as 00:00/00:00, this function is disabled.
Allow to charge battery: This option is automatically determined by setting in
“Charging source”. It’s not allowed to modify here. When “NONE” is selected in
charging source section, this option becomes unchecked as grey text.
Allow AC to charge battery: This option is automatically determined by setting
in ”Charging source”. It’s not allowed to modify here. When “Grid and V” or “Grid
or V” is selected in charging source section, this option is default selected. Under
Grid-tie mode, this option is invalid.

17
Allow to feed-in to the Grid: This option is only valid under Grid-tie and Grid-tie
with backup modes. Users can decide if this inverter can feed-in to the grid.
Allow battery to discharge when V is available: This option is automatically
determined by setting in “Load supply source ( V is available)”. When “Battery” is
higher priority than “Grid” in Load supply source ( V is available), this option is
default selected. Under Grid-tie, this option is invalid.
Allow battery to discharge when V is unavailable: This option is automatically
determined by setting in “Load supply source ( V is unavailable)”. When “Battery”
is higher priority than “Grid” in Load supply source ( V is unavailable), this option is
default selected. Under Grid-tie mode, this option is invalid.
Allow battery to feed-in to the Grid when V is available: This option is only valid in
Grid-tie with backup II or Grid-tie with backup III modes.
Allow battery to feed-in to the Grid when V is unavailable: This option is only valid
in all options of Grid-tie with backup mode.
Grid-tie with backup
Grid-tie with backup (I) :
V energy supply priority setting: 1
st
Battery, 2
nd
Load and 3
rd
Grid.
V power will charge battery first, then provide power to the load. If there is any
remaining power left, it will feed-in to the grid.
Battery charging source:
1. V and Grid (Default)

18
It’s allowed to charge battery from V power first. If it’s not sufficient, grid will
charge battery.
2. V only
It is only allow V power to charge battery.
3. None
It is not allowed to charge battery no matter it’s from V power or grid.
Load supply source:
When V power is available: 1
st
V, 2
nd
Grid, 3
rd
Battery
If battery is not fully charged, V power will charge battery first. And remaining V
power will provide power to the load. If it’s not sufficient, grid will provide power to
the load. If grid is not available at the same time, battery power will back up.
When V power is not available:
1. 1
st
Grid, 2
nd
Battery (Default)
Grid will provide power to the load at first. If grid is not available, battery power
will provide power backup.
2. 1
st
Battery, 2
nd
Grid
Battery power will provide power to the load at first. If battery power is running out,
grid will back up the load.
N TE: This option will become ineffective during AC charging time and the priority
will automatically become 1
st
Grid and 2
nd
Battery order. Otherwise, it will cause
battery damage.
Grid-tie with backup (II) :