maximo PV4048 HM Solar Inverter User Manual
- June 16, 2024
- maximo
Table of Contents
maximo PV4048 HM Solar Inverter User Manual
Appliances
ABOUT THIS MANUAL
Purpose
This manual describes the assembly, installation, operation and
troubleshooting of this unit.
Please read this manual carefully before installations and operations. Keep
this manual for future reference.
Scope
This manual provides safety and installation guidelines as well as information on tools and wiring.
SAFETY INSTRUCTIONS
WARNING: This chapter contains important safety and operating instructions. Read and keep this manual for future reference.
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Before installing the inverter, read all instructions and cautionary markings on the inverter, the batteries and all appropriate sections of this manual.
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CAUTION – Only use rechargeable deep-cycle lead acid type flooded, AGM or GEL batteries. or Lithium batteries. Other types of batteries may burst, causing injury and damage.
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Do not disassemble the inverter. Take it to a qualified service center when service or repair is required. Incorrect re-assembly may result in a risk of electric shock or fire.
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To reduce risk of electric shock, disconnect all wirings before attempting any maintenance or cleaning. Turning off the unit will not reduce this risk.
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CAUTION –Only qualified personnel should install this inverter and connect batteries.
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NEVER charge a frozen battery.
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For optimum operation of this inverter/charger, please follow required spec to select appropriate cable size. It’ s very important to correctly operate this inverter.
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Be very cautious when working with metal tools on or around batteries. A potential risk exists to drop a tool to spark or short circuit batteries or other electrical parts and could cause an explosion.
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Please strictly follow installation procedure when you want to disconnect AC or DC terminals.
Please refer to INSTALLATION section of this manual for the details. -
A Battery Isolator of appropriate size needs to be installed as over-current protection between the inverter and the battery.
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GROUNDING INSTRUCTIONS- This inverter should be connected to a permanent grounded wiring system. Be sure to comply with local requirements and regulation to install this inverter.
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NEVER cause AC output and DC input short circuited. Do NOT connect to the mains when DC input short circuits.
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Warning!! Only qualified service persons should service this inverter. If errors persist after following the troubleshooting table, please send this inverter back to local dealer or service center for maintenance.
INTRODUCTION
This is a multi-function inverter/charger, combining the functions of inverter, MPPT solar charger and battery charger to offer uninterruptible power supply. Its comprehensive LCD display offers user-configurable and easy- accessible button operation such as battery charging current, AC/solar charger priority, and acceptable input voltage based on different applications.
Features
Pure sine wave inverter, with built-in MPPT solar charge controller
Built-in automatic generator start function, 2-wire start
Configurable input voltage range for home appliances and personal computers
via LCD setting
Configurable battery charging current based on applications via LCD setting
Configurable AC/Solar Charger priority via LCD setting
Compatible to mains voltage or generator power
Auto restart while AC is recovering
Overload/ Over temperature/ short circuit protection
Smart battery charger design for optimized battery performance
Cold start function
Basic System Architecture
The following illustration shows a basic application for this inverter/charger. It also includes following devices to have a complete running system:
Generator
PV modules
Consult with your system integrator for other possible system architectures
depending on your requirements.
This inverter can power all kinds of appliances in home or office environment,
including motor-type appliances such as tube light, fan, refrigerator and air
conditioner.
Figure 1 Hybrid Power System
Product Overview
NOTE : For parallel model installation and operation, please check separate parallel installation guide for the details.
- LCD display
- Status indicator
- Charging indicator
- Fault indicator
- Function buttons
- Power on/off switch
- AC input
- AC output
- PV input
- Battery input
- Circuit breaker
- RS485 communication port
- Parallel communication port (only for parallel model)
- Parallel switch
- Dry contact
- USB
INSTALLATION
Unpacking and Inspection
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:
The unit x 1
User manual x 1
Communication cable x 1
USB cable x 1
Software CD x 1
Preparation
To be able to connect all wiring, take off bottom cover by removing four screws as shown below.
Mounting the Unit
Consider the following points before selecting where to install:
- Do not mount the inverter on flammable construction materials.
- Indoor use only, IP 20 rated, avoid direct sunlight
- Mount on a solid surface.
- Install this inverter at eye level in order to allow the LCD display to be read at all times.
- For proper air circulation to dissipate heat, allow a clearance of approx. 20 cm to the side and approx. 30 cm above and below the unit.
- The ambient temperature should be between 0℃ and 55℃ to ensure optimal operation.
- The recommended installation position is vertically to the wall.
- Be sure to keep other objects away as shown in the diagram to guarantee sufficient heat dissipation and to have space for removing wires
SUITABLE FOR MOUNTING ON NON-COMBUSTIBLE SURFACE ONLY.
Install the unit by screwing three screws
Battery Connection
CAUTION : For safe operation and regulation compliance, it’s required to
install a separate DC over-current protector or isolator between battery and
inverter. It may not be required to have a battery isolator in some
applications, however, it’s still required to have an over-current protection
installed. Please refer to table below for typical amperage to determine
required fuse or breaker and cable size.
WARNING! All wiring must be performed by a qualified person.
WARNING! It’s very important for system safety and efficient operation to
use appropriate cable for battery connection. In a parallel system (two or
three units) make the battery cables the same length.
Ring terminal:
Please follow below steps to implement battery connection:
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Fit recommended cable lugs to battery cables.
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Connect batteries to make a 48V battery bank. Suggested battery capacity is at least 200Ah for the 4KVA/5KVA inverter model.
NOTE : Only use Deep Cycle Flooded/GEL/AGM lead acid battery or approved Lithium batteries.
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Insert the cable lugs of battery cable flatly into the M6 battery connector of the inverter and make sure the nuts are tightened with a torque of 2-3 Nm. Making sure polarity at both the battery/battery isolator and the inverter is correctly connected.
AC Input / Output Connection
CAUTION!! Before connecting to AC input power source, please install a
separate AC breaker between inverter and AC input power source. This will
ensure the inverter can be securely disconnected during maintenance and fully
protected from over current of AC input. The recommended spec of AC breaker is
40A for 4KVA and 50A for 5KVA.
CAUTION!! There are two terminal blocks with “IN” and “OUT” markings.
Please do NOT-misconnect input and output connectors.
WARNING! All wiring must be performed by a qualified person.
WARNING! It’s very important for system safety and efficient operation to
use appropriate cable for AC input connection. To reduce risk of injury,
please use the proper recommended cable size as below.
Suggested cable requirement for AC wires
Please follow below steps to implement AC input/output connection:
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Before making AC input/output connection, be sure to open DC protector or disconnector first.
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Remove insulation sleeve 10mm for six conductors. And shorten phase L and neutral conductor N 3mm.
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Insert AC input wires according to polarities indicated on terminal block and tighten the terminal screws. Be sure to connect PE protective conductor ( ) first.
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Then, insert AC output wires according to polarities indicated on terminal block and tighten
terminal screws.
Be sure to connect PE protective conductor ( )first.
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Make sure the wires are securely connected.
CAUTION: Important
Be sure to connect AC wires with correct polarity. If L and N wires are connected reversely, it may cause AC short-circuited when these inverters are worked in parallel operation.CAUTION: Appliances such as air conditioner are required at least 2~3 minutes to restart because it’s required to have enough time to balance refrigerant gas inside of circuits. If a power shortage occurs and recovers in a short time, it will cause damage to your connected appliances. To prevent this kind of damage, please check manufacturer of air conditioner if it’s equipped with time-delay function before installation. Otherwise, this inverter/charger will trig overload fault and cut off output to protect your appliance but sometimes it still causes internal damage to the air conditioner.
PV Connection
CAUTION : Before connecting to PV modules, please install a DC circuit
breaker or DC isolator of appropriate size between inverter and PV modules.
WARNING! All wiring must be performed by a qualified person.
WARNING! It’s very important for system safety and efficient operation to
use appropriate cable size for PV module connection.
PV Module Selection:
When selecting PV modules, please be sure to consider below parameters:
- Open circuit Voltage (Voc) of PV array can not exceed 145Vdc in the coldest condition.
- Open circuit Voltage (Voc) of PV array needs to be higher than minimum battery voltage
Please follow below steps to implement PV module connection:
- Remove insulation sleeve 10 mm for positive and negative conductors
- Check correct polarity of connection from PV array to PV input
- Make sure the wires are securely connected
Recommended PV module configuration
Example: Array Voc 113.64V, coldest temperature -10°, Correction Factor 1.14,
effective Voc_max 129.5V. Use table below to find the appropriate Correction
Factor
Voltage Correction Factors for Crystalline and Multi-Crystalline Silicon PV
Modules
Communication Connection
Please use supplied communication cable to connect inverter to PC. Insert
bundled CD into a computer and follow on-screen instruction to install the
monitoring software. For the detailed software operation, please check user
manual of software inside of CD.
Dry Contact Signal
There is one dry contact (3A/250VAC) available on the rear panel. It could be
used to deliver a signal to an external device when the battery voltage
reaches warning levels to start a generator.
Connecting the CAN Cable
The CAN cable enables communication between the inverter and Li-ion batteries
with a CAN ports. The RS485 port on the inverter is used to communicate with
the battery. Below chart shows the pin configuration of the inverter.
OPERATION
Power ON/OFF
Once the unit has been properly installed and the batteries connected, flick the On/Off switch (located on the right hand bottom corner of the case) to the ON position to turn the inverter on.
Operation and Display Panel
The operation and display panel, shown in below chart, is on the front panel
of the inverter. It includes three indicators, four function keys and a LCD
display, indicating the operating status and input/output power information.
LED Indicator
Function Keys
LCD Display Icons
LCD Setting
After holding the “ENTER” button for 2 seconds, the unit will enter setting
mode.
Press “UP” or “DOWN” to select the correct setting. Press “ENTER” to confirm
the selection and move to the next step.
Setting Programs:
After pressing and holding “MENU” button for 6 seconds, the unit will enter reset model. Press “UP” and “DOWN” button to select programs. And then, press “ENTER” button to exit.
Fault Reference Code
Warning Indicator
Operating State Description
Display Setting
The LCD display information will be switched in turns by pressing “UP” or
“DOWN” key. The selectable information is switched as below order: battery
voltage, battery current, inverter voltage, inverter current，”AC in” voltage,
“AC in” current, load in Watt, load in VA, “AC in” frequency, inverter
frequency, PV voltage, MPPT charging power, MPPT charging output voltage, MPPT
charging current.
SPECIFICATIONS
Table 1 Line Mode Specifications
Table 2 Inverter Mode Specifications
*4KVA/5KVA only supports 230VAC system.
Table 3 Charge Mode Specifications
Table 4 General Specifications
TROUBLE SHOOTING
Appendix: Approximate Back-up Time Table
Note : Backup time depends on the quality of the battery, age of battery
and type of battery.
Specifications of batteries may vary depending on different manufacturers.
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