Delta H2.5, H3, H3A, H4A, H5A Operation And Installation Manual

H2.5 / H3 / H3A / H4A / H5A
Operation and Installation Manual

Grid-tie Transformerless Solar Inverter

The power behind competitiveness

www.deltaww.com

English 1

37

1　General Information

　 1.1　 Scope of delivery

　 1.2　 General Warnings / Notes on Safety

　 1.3　 Validity

　 1.4　 Product Description

　 1.5　 How it Works

1.6　 Additional Information
2　Installation and Wiring

　 2.1　 Instruction before Installation

　 2.2　 Unpacking

　 2.3　 Package Inspection

2.4　 Identification Label
3　Product Overview

　 3.1　 Dimensions

　 3.2　 Function Introduction

　 3.2.1　LED and Button

3.3　 Inverter Comparison
4　Installation

　 4.1　 Installation Location

4.2　 Mounting
5　Wiring

　 5.1　 Preparation before Wiring

　 5.2　 AC Grid Connection : L + N + PE

　 5.2.1　Required protective devices and cable cross-sections

　 5.3　 DC Connection (from PV Array)

5.3.1　Asymmetrical Loading
6　Active/Reactive Power Control and LVRT (Optional)

　 6.1　 Active Power Control

　 6.1.1　Power Limit

　 6.1.2　Power vs. Frequency

　 6.2　 Reactive Power Control

　 6.2.1　

　 6.2.2　

　 6.2.3　

　 6.2.4　

　 6.3　 Low Voltage Ride Through (LVRT)

6.4　 Digital Input
7　Turning the PV inverter on/off

　 7.1　 Start-up Procedures

　 7.1.1　PV Array DC Voltage Checking

　 7.1.2　AC Utility Voltage Checking

　 7.1.3　Starting up the Inverter

8　Maintenance
9　Error Message and Trouble Shooting

　 9.1　 Error Message & Trouble Shooting

10 De-Commissioning
11 Technical Data

　 11.1　 Specifications

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Contents

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3

Figure 1-1 : Solar system operation illustration

Figure 2-1 : Unpacking process

Figure 2-2 : Components of H2.5 / H3 / H3A / H4A / H5A

Figure 2-3 : The identification label

Figure 3-1 : Dimensions of H2.5 / H3 / H3A / H4A / H5A

Figure 3-2 : Inverter exterior objects

Figure 3-3 : LED and Button

Figure 3-4 : Inverter comparison

Figure 4-1 : Attaching the mounting bracket for H2.5 / H3 / H3A / H4A / H5A

Figure 4-2 : Correct and incorrect installation illustration

Figure 4-3 : Adequate installation gap

Figure 5-1 : Connection of a system for floating solar array

Figure 5-3 : DC Wiring illustration

Figure 6-1 : Power vs. frequency characteristic

Figure 6-3 : Q(U) characteristic

Figure 6-4 : LVRT characteristic

Figure 6-5 : Digital input via PPM DC1

Figure 6-6 : Digital input on PPM DC1

Figure

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Table 2-1 : Packing list

Table 3-1 : LED and Reset button function

Table 5-1 : Recommended upstream protection

Table 5-2 : MC4 connectors

Table 9-1 : Error Message

Table 9-2 : Fault Message

Table 11-1 : Specifications

Table

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19

29

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4

1　General Information

1.1 Scope of delivery

Congratulations on the purchase of your Delta H2.5 / H3 / H3A / H4A / H5A
grid-tied solar inverter. This manual will assist you in becoming familiar with this
product. Please observe all safety regulations and take into account the
connection requirements by your local grid utility.

1.2 General Warnings / Notes on Safety

Careful handling of the product will contribute to it's service life durability and
reliability. Both are essential to ensure maximum yield from your product. As some of

DANGER!

no user-serviceable parts. Opening the inverter will void the warranty.

recommend 5 minutes for discharging.
Remember that the unit has a high leakage current.
The PE conductor MUST be connected prior to commencing operation.

Inappropriate handling can lead to physical injury and material damage.
Always adhere to the installation regulations. Installation may only be conducted
by certified electricians.

CAUTION !

WARNING !

Repair work on the device should ONLY be carried out by the manufacturer.
The inverter contains no user serviceable parts inside.
Please observe all points in the operation and installation manual. Isolate the device
from the grid and the PV modules before undertaking work on the device.

WARNING !

operation.

For operation and installation of inverter refer to the user manual.
Failure to comply with the instructions in this manual may void the warranty.

ATTENTION

5

General Information

1.3 Validity

data and safety instructions of the following solar inverter models under the
DELTA brand.

1.4 Product Description

This device is a single-phase grid-tie solar inverter. It converts direct current (DC)
electricity from the PV array into single phase alternating current (AC) to supply
power to the load and feed the excess generated power back to the local grid.
This inverter allows for a wide voltage input range and has a high performance

(Digital Signal Processor) design reduces the complexity of the circuit and
electronic components. Please note that this device does not support off-grid
function. The features for H2.5 / H3 / H3A / H4A / H5A are shown below.

1.5 How it Works

The operation of a solar inverter is shown in Figure 1-1.

power supplied from the PV Array into single-phase AC output power to Grid.

1.6 Additional Information

For more detailed information for H2.5 / H3 / H3A / H4A / H5A or other related
product

Features

• 

• 

• 

• 

• 

• 

Figure 1-1 : Solar system operation illustration

PV Array Electrical GridSolar Inverter

•H3A •H4A •H5A•H3•H2.5

6

General Information

2　Installation and Wiring

2.1 Instruction before Installation

manual thoroughly before installation. Installation of the unit and start-up
procedures must be carried out by an accredited technician.

protective packaging. This packaging consists of various materials that will need
to be disposed of according to the specific recycling marking printed on them.

2.2 Unpacking

Unpacking process is shown as Figure 2-1.

Figure 2-1 : Unpacking process

7

Installation and Wiring

2.3 Package Inspection

Unforeseeable events causing damage or movement may occur during shipment.
Please check for damage on the packaging upon receiving your inverter.
Please check the model number and the serial number on the packaging is identical
with the model number and serial number on the unit itself.

listed as Table 2-1:

H2.5 / H3 / H3A / H4A / H5A

Object

PV Inverter

User

Manual

AC Plug

Wall-Mount

Bracket

Qty

1

1

1

1

Description

Solar inverter

Table 2-1 : Packing list

Connector for AC connection

DC Plug

①

②

③

⑤

④

①

②

③ ⑤

④

2 pairs

1 pairs

MC4 connector for DC connection for H3A / H4A / H5A models

MC4 connector for DC connection for H3 / H2.5 models

Wall-mount bracket to mount the solar inverter securely on the wall

If there is any visible damage to the inverter/accesories or any damage to the

CAUTION !

For H3A

H4A
H5A

For H3

H2.5

Figure 2-2 : Components of H2.5 / H3 / H3A / H4A / H5A

8

Installation and Wiring

2.4 Identification Label

Users can identify the model name by the information on the product label.

Figure 2-3.

Figure 2-3 : The identification label

Model: H3A

3kVA nom. 14.3A max.

* 2.99kVA max. for AU/NZ

Protective class: I
OVC: 3
Inverter topology: transformer-less

Year & Month of Manufacturing: YYMM

Delta Electronics (Netherlands) B.V.

The Netherlands

Made in China

:DELTASOL

9

Installation and Wiring

3 Product Overview

3.1 Dimensions

Figure 3-1 : Dimensions of H2.5 / H3 / H3A / H4A / H5A

Figure 3-2 : Inverter exterior objects

3.2 Function Introduction

Figure 3-2. The description for individual

objects can be found in sections 3.2.1.

Label
Grounding

AC connector

DC connectors

Comm. Interface

DC switch

91

91

H2.5 / H3 / H3A / H4A H5A

10

Product Overview

3.2.1 LED and Button

Figure 3-3 : LED and Button

Table 3-1 : LED and Reset button function

The LEDs indicate the operating state of the inverter.

The Reset button function

Status Explanation

steady on

The red LED glowing indicates error or fault.
( see 9.1 Error Message )

steady on The inverter is connected to the grid.

flashing The red LED flashing indicates error "E34：Insulation"

flashing

steady on The Wi-Fi module is on data transmission.

LED

Earth Fault
Alarm

Grid

Wi-Fi

Wi-Fi LED Status Explanation

Wi-Fi LED flashing once every
one seconds

returns to the default: DELTASOL

Wi-Fi LED flashing once every
half a second

Reset Wi-Fi module

Operation

11

Product Overview

3.3 Inverter Comparison

Figure 3-4 : Inverter comparison

Model series 211/221 does not have the DC switch.

H3A
H4A

H3A_221
H4A_221

H2.5
H3

(No DC switch)

(No DC switch)

H2.5

_211

H3_211

H5A (No DC switch)H5A

_221

12

Product Overview