INVT BD Series Hybrid Inverter User Manual

Manufacturer: INVT Solar Technology (Shenzhen) Co., Ltd.

Address: 6th Floor, Block A, INVT Guangming Technology Building, Songbai Road, Matian, Guangming District, Shenzhen, China. Postcode: 518106

Web: www.invt-solar.com

E-mail: solar@invt.com.cn

1. Introduction

1.1 Important Safety Instructions

? Danger!

• Danger to life due to high voltages in the inverter!
• All work must be carried out by a qualified electrician.
• The appliance is not to be used by children or persons with reduced physical sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction.
• Children should be supervised to ensure that they do not play with the appliance.

⚠️ Caution!

• Danger of burn injuries due to hot enclosure parts!
• During operation, the upper lid of the enclosure and the enclosure body may become hot.
• Only touch the lower enclosure lid during operation.

⚠️ Caution!

• Possible damage to health as a result of the effects of radiation!
• Do not stay closer than 20 cm to the inverter for any length of time.

? Note!

• Grounding the PV generator.
• Comply with the local requirements for grounding the PV modules and the PV generator. It is recommended to connect the generator frame and other electrically conductive surfaces in a manner which ensures continuous conduction and ground these in order to have optimal protection of system and persons.

⚠️ Warning!

• Ensure input DC voltage is less than the maximum DC voltage. Over voltage may cause permanent damage to the inverter or other losses, which will not be included in warranty!

⚠️ Warning!

• Authorized service personnel must disconnect both AC and DC power from the inverter before attempting any maintenance or cleaning or working on any circuits connected to the inverter.
• Risk of electric shock!
• Accessories only together with the inverter shipment are recommended here. Otherwise, it may result in a risk of fire, electric shock, or injury to person.
• Make sure that existing wiring is in good condition and that the wire is not undersized.
• Do not disassemble any parts of the inverter which are not mentioned in the installation guide. It contains no user-serviceable parts. See Warranty for instructions on obtaining service. Attempting to service the inverter yourself may result in a risk of electric shock or fire and will void your warranty.
• Keep away from flammable, explosive materials to avoid fire disaster.
• The installation place should be away from humid or corrosive substances.
• Authorized service personnel must use insulated tools when installing or working with this equipment.
• PV modules shall have an IEC 61730 class A rating.
• Never touch either the positive or negative pole of the PV connecting device. Strictly prohibit touching both of them at the same time.
• The unit contains capacitors that remain charged to a potentially lethal voltage after the MAINS, battery, and PV supply has been disconnected.
• Hazardous voltage will be present for up to 5 minutes after disconnection from power supply.
• CAUTION - RISK of electric shock from energy stored in capacitor. Never operate on the inverter couplers, the MAINS cables, Battery cables, PV cables, or the PV generator when power is applied. After switching off the PV, battery, and Mains, always wait for 5 minutes to let the intermediate circuit capacitors discharge before unplugging DC, battery inplug, and MAINS couplers.
• When accessing the internal circuit of the inverter, it is very important to wait 5 minutes before operating the power circuit or demounting the electrolyte capacitors inside the device. Do not open the device beforehand, since the capacitors require time to discharge sufficiently!

1.2 Explanation of Symbol

This section gives an explanation of all the symbols shown on the inverter and on the type label.

1.3 Basic features

The BD series hybrid inverter is a high-quality inverter that can convert solar energy to AC energy and store energy into the battery.

The inverter can be used to optimize self-consumption, store energy in the battery for future use, or feed into the public grid. Work mode depends on PV energy and user's preference. It can provide power for emergency use during grid loss by using the energy from the battery and inverter (generated from PV). In addition, the parallel function is available (off-grid model).

System Diagram 1 (applies to most countries)

Description: This diagram illustrates the system connections. PV modules (PV1+, PV1-, PV2+, PV2-) are connected to the inverter. The inverter is connected to the Grid (via AC, Meter, Main switch, RCDs) and to the Battery. An EPS output is also shown, which powers the Loads. The diagram includes a DC disconnect switch and grounding points (PE).

System Diagram 2 (applies to wiring rules AS/NZS_3000:2012 for Australia and New Zealand)

Description: Similar to System Diagram 1, this diagram shows the connections for PV modules, Inverter, Grid, Battery, EPS, and Loads, adhering to specific Australian and New Zealand wiring standards.

? Note! The instrument and switch in the above figures are provided by users.

1.4 Work Modes

Hybrid Inverter provides multiple work modes based on different requirements.

Work modes: Self-use

1. When PV, Grid, Battery is available:

• A. Solar energy provides power to the loads as first priority. If solar energy is sufficient to power all connected loads, excess solar energy will charge the battery, and then redundant power will feed to the grid.
• B. Solar energy provides power to the loads as first priority. If solar energy is not sufficient to power all connected loads, battery energy will supply power to the loads at the same time.
• C. Solar energy provides power to the loads as first priority. If solar energy and battery are not sufficient to power all connected loads, utility energy (Main Grid) will supply power to the loads along with solar energy at the same time.

2. When PV, Grid is available (without battery):

• A. Solar energy provides power to the loads as first priority. If solar energy is sufficient, the excess power will feed to the grid.
• B. Solar energy provides power to the loads as first priority. If solar energy is not sufficient to power all connected loads, Grid energy will supply power to the loads at the same time.

3. When PV, Battery is available (Grid is disconnected):

• A. Solar energy provides power to the loads as first priority. If solar energy is sufficient to power all connected loads, solar energy will provide charging for the battery.
• B. Solar energy provides power to the loads as first priority. If solar energy is not sufficient to power all connected loads, battery energy and solar energy will supply power to the loads at the same time.

Work modes: Peak shift

1. When PV, Grid, Battery is available:

• A. On charge time, solar energy will charge the battery as first priority. Excess energy will supply power to the loads. If solar energy is sufficient to supply loads and charge battery, and if there's still some extra energy, then the excess power will feed to the grid.
• B. On charge time, solar energy will charge the battery as first priority, then the excess solar energy will supply power to loads. If solar energy is not sufficient to charge battery and supply loads, the grid will supply all the connected loads with solar energy together.
• C. On discharge time, solar energy provides power to the loads as first priority. If solar energy is sufficient to supply loads, and if there's still some extra energy from solar energy, then the excess power and battery will deliver power to the grid at the same time.
• D. In the period of no charge or discharge, the solar power supplies loads at first priority, with excess energy to the grid.

2. When Grid, Battery is available (PV is disconnected):

• A. On charge time, the grid will charge the battery and supply power to the connected loads at the same time.
• B. On discharge time, if load power is less than battery power, the battery will supply power to loads as first priority, and the excess power will be fed to the grid.
• C. On discharge time, if load power is more than battery power, battery and grid will supply power to the loads at the same time.

Work modes: Bat priority

1. When PV, Grid, Battery is available:

• A. Solar energy will charge the battery as first priority. If solar energy is excess, the excess power will supply the load. If there's still some extra energy, then the excess power will feed the power to the grid.
• B. Solar energy will charge the battery as first priority. If solar energy is excess, the excess power will supply the load. If solar energy is not sufficient to charge the battery and supply loads, the grid will supply power to the loads.

2. When Grid, Battery is available (PV is disconnected):

The grid will supply power to the load and charge the battery at the same time.

? Note! If the anti-Reverse function is allowed, once on the work mode of Self-use, Peak shift, or Battery priority, the system will not feed power to the grid.

1.5 Dimension

Description: The inverter has dimensions of 550.0mm (Width) x 520.0mm (Height) x 200.0mm (Depth).

2. Interface definition and Technical Data

2.1 Interface definition

Description: The front panel of the inverter features various ports and indicators. A diagram shows the layout of these interfaces, labeled A through P.

? Note!

• The Update port is for on-premises upgrades.
• The BMS port is for BMS communication for lithium batteries.
• The CT port is for external grid-side CT to detect current size.
• The DRM port, CAN port, NTC port, and DRY IO port are reserved ports, temporarily unavailable.

2.2 Technical Data

The following table details the technical specifications for various INVT BD Series Hybrid Inverter models (BD3KTL-RL1 to BD6KTL-RL1).

? Note! If the South African national grid standard is selected, the grid power is only 4.6kW!

2.3 Basic Data

2.4 Safety and Protection

3. Installation

3.1 Check for Physical Damage

Make sure the inverter is intact during transportation. If there is any visible damage, such as cracks, please contact your dealer immediately.

3.2 Packing List

Open the package and take out the product, please check the accessories first. The packing list is shown below.

3.3 Tools required for installation.

Installation tools: crimping pliers for binding post and RJ 45, screwdriver, manual wrench, etc.

3.4 Mounting

Space Requirement

Description: The inverter requires specific clearance around it for proper ventilation and access. The diagram shows a 300mm clearance required on the left, right, top, bottom, and front.

Mounting Steps:

Step 1: Screw the wall bracket on the wall

1.1 Place the bracket on the wall and mark down the position of the 4 holes.

1.2 Drill holes with a driller, make sure the holes are deep enough (at least 60mm) to support the inverter.

1.3 Install the expansion tubes in the holes, and tighten them. Then install the wall bracket with the expansion screws.

Step 2: Place the inverter on the wall-mounted bracket by holding the handle on the side.

Step 3: Tighten the fixing screws on both sides of the inverter.

Step 4: If necessary, the customer can install an anti-theft lock on the left-bottom of the inverter.

4. Electrical Connection

Electrical connection diagram

Description: This diagram illustrates the electrical connections for the hybrid inverter. It shows connections for Battery (BAT), PV inputs (PV1, PV2), Communication (COM), Grid (GRID), and EPS output (EPS). Various breakers (BAT Breaker, PV Breaker, EPS Breaker, Main Breaker, AC Breaker) and components like Meter, CT, and Loads are depicted in the system.

4.1 Grid connection and EPS connection

Hybrid inverters are designed for single-phase grids. Voltage is 220/230/240V, frequency is 50/60Hz. Other technical requests should comply with the requirements of the local public grid.

Micro-breakers should be installed between the inverter and the grid. Any load should not be connected directly to the inverter.

Step-by-step connection instructions:

Step 1: Check the grid voltage.

1.1 Check the grid voltage and compare with the permissive voltage range (Please refer to technical data).

1.2 Disconnect the circuit board from all phases and secure against re-connection.

Step 2: Remove the waterproof lid from the grid port on the inverter.

Step 3: Make AC and EPS wires.

3.1 Choose the appropriate wire (Cable size: refer to Table 1).

3.2 Reserve about 60mm of conductor material sectional area and remove 10mm of insulation from the end of the wire.

3.3 Separate the docking screw cap of the AC terminal from the housing portion and insert stripped wires into the AC terminal, then tighten the screws with a hexagonal wrench.

3.4 Tighten the docking screw cap and housing portion of the AC terminal.

Step 4: Connect the AC connector to the GRID port of the inverter and tighten the screw cap. Connect the LOAD connector to the EPS port of the inverter and tighten the screw cap.

? Note: Connect the AC connector to the GRID interface.

4.2 PV connection

Hybrid Inverters can be connected in series with 2-string PV modules for 3KW, 3.6KW, 4KW, 4.6KW, 5KW, and 6KW models. Select PV modules with excellent function and reliable quality. Open-circuit voltage of module arrays connected in series should be less than the Max. DC input voltage; operating voltage should conform to the MPPT voltage range.

Max. DC Voltage Limitation:

⚠️ Warning! PV module voltage is very high, which already achieves dangerous voltage range. Please comply with electric safety rules when connecting. Please do not make PV positive or negative ground!

Connection Steps:

Step 1: Checking PV module to ensure PV is in open circuit state and ensure the PV+ and PV- ports of the PV string are correct.

Step 2: Separating the DC connector.

Description: This step involves separating the plug, pin contact, and cable nut components of the DC connector.

Step 3: Wiring

3.1 Choose the 12 AWG wire to connect with the cold-pressed terminal.

3.2 Remove 10mm of insulation from the end of the wire.

3.3 Insert the insulation into the pin contact and use crimping pliers to clamp it.

Step 4: Insert pin contact through the cable nut to assemble into the back of the male or female plug. When you feel or hear a “click” sound, the pin contact assembly is seated correctly.

Step 5: Plug the PV connector into the corresponding PV connector on the inverter.

4.3 Battery Connection

Notes:

• Before choosing a battery, please note the maximum voltage of the battery cannot exceed 59V and the rated voltage of the battery cannot exceed 48V. The battery communication should be compatible with the Hybrid inverter.
• Before connecting to the battery, please install a nonpolarized DC (125A) breaker to ensure the inverter can be securely disconnected during maintenance.
• The connecting cable between the battery and the inverter shall be at least 4AWG.
• The battery communication can only work when the battery BMS is compatible with the inverter.
• To replace the battery, you need to turn off all switches and unplug the system communication line.
• All the above wiring and operations must be carried out after the whole machine is powered down, and all of them need professional personnel to complete.

Power Connection Steps:

Step 1: Choose the 4AWG wire and strip the cable to 15mm.

Step 2: Select two O-terminals with an aperture of M6.

Step 3: Insert the stripping line into the O-terminal and clamp it with a crimping clamp.

Step 4: Remove the waterproof cover plate.

Step 5: Disassemble the waterproof connector and pass the cable through the waterproof connector.

Step 6: Connect the cable to the terminal of the inverter.

Step 7: Assemble waterproof connectors and waterproof covers plate.

? Note! Positive and negative lines are not allowed to reverse. The positive pole is on the left and the negative pole is on the right.

4.4 Communication interface definition

BMS PIN Definition

Communication interface between inverter and battery is RS485 or CAN with an RJ45 connector. The wiring sequence of the crystal head conforms to the 568B standard: orange white, orange, green white, blue, blue white, green, brown white, and brown.

DRY_IO (RJ45 PIN) Definition

Reserved dry contact interface of the inverter.

DRM Connection

DRM is provided to support several demand response modes by emitting control signals as below. ? Note: Only PIN6(DRM0) is available now, and other PIN functions are being developed.

4.5 WiFi And GPRS Connection (optional)

The inverter provides a WiFi port which can collect data from the inverter and transmit it to a monitoring website by WiFi.

Steps:

Step 1: Plug WiFi into “COM” port at the bottom of the inverter.

Step 2: Build the connection between the inverter and router.

Step 3: Create a user account online. (Please check the WiFi user manual for more details).

Diagram:

Description: Illustrates connecting a WiFi module to the inverter's COM port, which then connects to a router and the cloud for monitoring.

GPRS Connection:

GPRS connection interface is consistent with WIFI interface. Please refer to the GPRS user manual for detailed connection steps.

Diagram:

Description: Illustrates connecting a GPRS module to the inverter, which then connects to a router and the cloud for monitoring, similar to the WiFi connection.

5. LCD Interface and Setting

5.1 Control Panel

Description: The control panel features an LCD screen (A) and indicator LEDs (B, C, D, E) for status indication, along with function buttons (F, G, H, I) for navigation and selection.

5.2 Instructions for LED Indicator

5.3 Instructions for the use of three modes

Description: This section outlines the hierarchical menu structure for configuring the inverter's settings, including System Settings, Battery Settings, Baud Rate, Language, and more.

Example: Before selecting a mode, configuration can be done according to the local power grid, PV input mode, and battery type.

Power grid:

Flow: Circular display interface -> User -> Enter password -> Choose according to local power grid -> Press Enter button -> 3:GRID STD.

Password: Default is 00000. Use UP/DOWN buttons to adjust, Enter to move cursor, Esc to go back.

PV input mode:

Flow: Setting -> 1:SYS SETTING -> 6 PV INPUT -> Select PV input mode, Press Enter to confirm.

Battery parameters:

Flow: Setting -> 1:BAT TYPE -> Enter password -> Set corresponding battery type, Press Enter to confirm.

5.4 LCD Interface

5.4.1 Error information

5.4.2 System setting

5.4.3 System setting 2

5.4.4 System setting 3

5.4.5 PV1 Input display interface

5.4.6 PV2 Input display interface

5.4.7 DC Voltage interface

5.4.8 Battery interface

5.4.9 Battery current interface

5.4.10 Battery current interface

5.4.11 Grid-connected

5.4.12 INV

5.4.13 LOAD

5.4.14 POWER

5.4.15 POWER

5.4.16 Temperature

5.4.17 State

5.5 Settings

5.5.1 State

5.5.2 SET Password

5.5.3 Setup

5.5.4 System setting

5.5.4.1 System setting

5.5.4.1.1 Work mode

5.5.4.1.2 Peak shift work time

5.5.4.2 EPS enable

5.5.4.3 Battery wake-up

5.5.4.4 REMOTE CTRL

5.5.4.5 START DELAY

5.5.4.6 PV INPUT MODE

5.5.4.7 Anti Reverse

5.5.5 BAT SETTING

5.5.5.1 BAT SETTING

5.5.5.1.1 BAT TYPE

5.5.5.1.1.1 Lead-acid battery parameter

5.5.5.2 BAT-COMM

5.5.6 Grid standard

5.5.6.1 Grid std

5.5.7 RUN SETTING

5.5.7.1 RUN SETTING

5.5.7.2 REACT MODE

5.5.7.3 GRID POWER

5.5.7.4 DISCHARGE POWER

5.5.7.5 PV POWER

5.5.7.6 VAC-MIN

5.5.7.7 VAC-MAX

5.5.7.8 FAC-MIN

5.5.7.9 FAC-MAX

5.5.8.10 ACTIVE REF.

5.5.8 485 Address

5.5.8.1 485 Address

5.5.9 485 BAUD RATE

5.5.9.1 BAUD RATE

5.5.10 LANGUAGE

5.5.10.1 LANGUAGE

5.5.11 BACKLIGHT

5.5.11.1 BACKLIGHT

5.5.12 DATE/TIME

5.5.12.1 DATE/TIME

5.5.13 CLEAR REC

5.5.13.1 Clear history

5.5.14 PASSWORD

5.5.14.1 PASSWORD

5.5.15 MAINTENANCE

5.5.15.1 MAINTENANCE

5.5.16 FCTRY RESET

5.5.16.1 FACTORY RESET

5.6 INQUIRE

5.6.1 INQUIRE

5.6.1.1 INV MODULE

5.6.2 MODULE SN

5.6.3 FIRMWARE

5.6.4 RUNNING RECORDS

5.6.5 DIAGNOSE

5.7 STATISTIC

5.7.1 STATISTIC

? Note: 1. E-TODAY/MONTH/YEAR/TOTAL → INPUT → PV/GRID(Consume)/BATD(Battery discharge) → OUTPUT → BATC(Battery charge)/GRID(Generation)/ CNSUM(Load consume)

2. If the inverter shuts down before 24:00 on that day, the day statistic will not be stored.

5.8 Autotest Fast

Procedure: Press the Enter button and default password 00000, then press the Enter button to start the autotest.

The test progresses through various stages (e.g., Testing 59.S1..., Test59.S1 OK!). The system waits at each stage. After the test, use the up/down buttons to page through the test results.

Test Results Description:

6. Fault diagnosis and solutions

The inverter is easy to maintain. When you encounter the following problems, please refer to the Solutions below, and contact the local distributor if the problem remains unsolved. The following table lists some of the basic problems that may occur during actual operation as well as their corresponding basic solutions.

Fault diagnosis table

? Note: If an error occurs that is not listed in the table, Please Contact customer service.