DELTA H2.5 Transformerless Solar Inverter Installation Guide

: August 24, 2024
: Delta

Table of Contents

DELTA H2.5 Transformerless Solar Inverter
Product Information
Product Usage Instructions
Descriptions of Parts and Components
Dimensions and Function Introduction
Safety Information
Mounting
LED and Button
Specifications
Read User Manual Online (PDF format)
Download This Manual (PDF format)

DELTA H2.5 Transformerless Solar Inverter

Product Information

Specifications:

Model: Grid-tie Transformerless Solar Inverter
Voltage: H2.5/H3/H3A/H4A/H5A_220/H5A_221
Maximum PV Array Open Circuit Voltage: 500Vdc (H2.5) / 600Vdc (H3/ H3A/ H4A/ H5A)
Wireless Communication Support

Product Usage Instructions

Warnings:

Do not install the unit near or on flammable surfaces. Mount the unit tightly on a solid/smooth surface.
Cover the photovoltaic array with an opaque material before wiring to reduce shock hazards.
Ensure all AC circuit breakers are switched off before commencing AC wiring.

Caution:

Installation must be done by certified electricians to prevent injury and damage.
Maintain distance from devices emitting strong radio waves to avoid signal interference.
Ensure good communication quality by keeping the connection signal strength at least -70 dBm when using Wi-Fi.

Mounting:

Connect the AC Plug and DC Plug as per the model (H3A / H4A / H5A or H2.5 / H3).
Use the Wall-Mount Bracket to securely mount the solar inverter on the wall.

Dimensions and Function Introduction:
The product includes components such as DC switch, DC connectors, Comm. Interface, AC connector, Grounding, and LED and Button for status indication.

FAQ:

Q: What should I do if there is visible damage to the inverter or accessories?
A: Contact your inverter supplier before installation to address any visible damage.

User manual/DC1_100 manual/APP download/APP guideline

Please scan the QR-code for more instructions, specifications,s and settings of DC1_100 or APP.

https://mydeltasolar.deltaww.com/?p=product_manual.

Descriptions of Parts and Components

DELTA-H2.5-Transformerless-Solar-Inverter-Fig-2

|

Object

| Qty|

Description

---|---|---|---
①| PV Inverter| 1| Solar inverter
②| Quick Installation Guide|

1

Caution
If there is any visible damage to the inverter/accesories or any damage to the packaging, please contact your inverter supplier before installation.

Dimensions and Function Introduction

DELTA-H2.5-Transformerless-Solar-Inverter-Fig-3

Safety Information

Warning

| Do not install the unit near or on flammable surfaces. Mount the unit tightly on a solid/smooth surface.
| When the photovoltaic array is exposed to light, it supplies a DC voltage to the Inverter, a shock hazard may exist due to output wires or exposed terminals.

To reduce the risk of shock during installation, cover the array with an opaque (dark) material and ensure that the Disconnect Device in the inverter is set to OFF before commencing any wiring.

| Before commencing AC wiring, please ensure all AC circuit breakers are switched off.

Caution

| During the operation of electrical devices, certain parts are under dangerous voltage. Inappropriate handling can lead to physical injury and material damage.

Always adhere to the installation regulations.

Installation may only be conducted by certified electricians.

| The maximum open circuit voltage of the PV Array must not exceed 500Vdc (H2.5) / 600Vdc (H3/ H3A/ H4A/ H5A).
| The product supports wireless communication.

– Install the product as far away as possible from devices that emit strong radio waves, such as civil band radio equipment.

– Do not install the product in a metal box and make sure there is no metal barrier between the product and connecting devices to prevent the communication signal attenuation.

– When using Wi-Fi to connect the inverter, the connection signal strength is recommended to be at least -70 dBm to ensure good communication quality.

Mounting

DELTA-H2.5-Transformerless-Solar-Inverter-Fig-7

LED and Button

LED| Action|

Status

---|---|---

Alarm

| Flash:100ms On, 100ms Off| Insulation
Steady on| Error or Fault. (see user manual – Chapter 9 )

Grid

| Flash:100ms On, 100ms Off| Default Country Setting
Flash:1s On, 1s Off| Countdown
Steady on| On-grid

Wi-Fi

| Flash:3s On, 3s Off| Connected to Wi-Fi router/DC1
Flash:3s Flash(100ms), 3s Off| Connected to both WiFi router/DC1 and mobile device
Off| Not connected
Steady on| Connected to mobile device
Flash:100ms On, 100ms Off| Connected to mobile device and transferring data
Flash:500ms On, 500ms Off| Reboot Wi-Fi (Press Button 3~10s)
Flash:1s On, 1s Off| Reset password & Wi-Fi settings (Press Button 20~30s)

Reset Button

| Wi-Fi LED Status|

Description

---|---|---
Push 3s~10s| Wi-Fi LED flashing once every half a second| Reset Wi-Fi module
Push 10s~20s| No flash| No function
Push 20s~| Wi-Fi LED flashing once every one seconds| Reset the Wi-Fi module, and the Wi-Fi password returns to the default: DELTASOL

Specifications

*Model 1| H2.5_210 H2.5_211| H3_210 H3_211| H3A_220 H3A_221| H4A_220 H4A_221| H5A_220 H5A_221
---|---|---|---|---|---
GENERAL
Enclosure| Powder-coated aluminium
Operating temperature| -25~60°C, full power up to 40°C
Operating Altitude| 2000 m
Relative humidity| 0% – 95% non-condensing.
Environmental category| Outdoor, wet locations
Galvanic isolation| No (TL Topology)
Safety class| Class I metal enclosure with protective earth
Pollution degree| Internal: II, External: III
Overvoltage category| AC output: III, DC input: II
Flicker impedance| Z = 0.4 + j 0.25 Ω (total impedance)
Three-phase combinations| No
DC INPUT (Solar side)**
Max. input voltage| 500 Vdc| 600 Vdc
Operating voltage range| 30-500 Vdc| 30-550 Vdc
MPP range (rated power)| 240-470 Vdc| 290-500 Vdc| 180-500 Vdc| 240-500 Vdc
Normal voltage| 350 Vdc
MPP tracker| 1| 2

Maximum input current

|

11 A

| 11 Adc for each / 18 Adc for total| 11Adc for each/ 22Adc for total
Max. short circuit current (per MPPT)| 15 A
Max. inverter back feed current to the array|

0 A