maximo PV4048 HM User manual

maximo
USER’S MANUAL
SOLAR INVERTER
PV4048 HM &
PV5048 HM
Version 10 August 2018
Appliances
PC TV Air-conditioning Fridge Washing machine

1
Table of Contents
ABOUT THIS MANUAL ................................................................................................... 1
Purpose..........................................................................................................................................1
SAFETY INSTRUCTIONS .............................................................................................. 1
INTRODUCTION ........................................................................................................... 3
Features.........................................................................................................................................3
Basic System Architecture............................................................................................................3
Product Overview .........................................................................................................................4
INSTALLATION ............................................................................................................ 5
Unpacking and Inspection.............................................................................................................5
Preparation....................................................................................................................................5
Mounting the Unit.........................................................................................................................5
Battery Connection .......................................................................................................................6
AC Input/ Output Connection.......................................................................................................8
PV Connection............................................................................................................................10
Communication Connection .......................................................................................................11
Dry Contact Signal......................................................................................................................11
Connecting the CAN Cable ........................................................................................................11
OPERATION ................................................................................................................ 12
Power ON/OFF...........................................................................................................................12
Operation and Display Panel ......................................................................................................12
LCD Display Icons .....................................................................................................................13
LCD Setting................................................................................................................................15
Fault Reference Code..................................................................................................................20
Warning Indicator.......................................................................................................................22
Operating Mode Description.......................................................................................................23
Display Setting............................................................................................................................25
SPECIFICATIONS .....................................................................................................................26
Table 1 Line Mode Specifications..............................................................................................26
Table 2 Inverter Mode Specifications.........................................................................................27
Table 3 Charge Mode Specifications..........................................................................................28
Table 4 General Specifications...................................................................................................29
TROUBLE SHOOTING ................................................................................................. 29
Appendix: Approximate Back-up Time Table .......................................................... 30

2
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.
1. Before installing the inverter, read all instructions and cautionary markings on the inverter, the
batteries and all appropriate sections of this manual.
2. 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.
3. 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.
4. To reduce risk of electric shock, disconnect all wirings before attempting any maintenance or
cleaning. Turning off the unit will not reduce this risk.
5. CAUTION --Only qualified personnel should install this inverter and connect batteries.
6. NEVER charge a frozen battery.
7. 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.
8. 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.
9. 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.
10. A Battery Isolator of appropriate size needs to be installed as over-current protection between
the inverter and the battery.
11. 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.
12. NEVER cause AC output and DC input short circuited. Do NOT connect to the mains when
DC input short circuits.
13. 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.

3
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
ConfigurableAC/Solar Charger priority via LCD setting
Compatible to mains voltage or generator power
Auto restart whileAC is recovering
Overload/ Over temperature/ short circuit protection
Smart battery charger design for optimized battery performance
Cold start function
Basic SystemArchitecture
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

4
Product Overview
4KVA-5KVA parallel model
1. LCD display
2. Status indicator
3. Charging indicator
4. Fault indicator
5. Function buttons
6. Power on/off switch
7. AC input
8. AC output
9. PV input
10. Battery input
11. Circuit breaker
12. RS485 communication port
13. Parallel communication port (only for parallel model)
14. Parallel switch
15. Dry contact
16. USB
4KVA-5KVA single model
NOTE: For parallel model installation and
operation, please check separate parallel
installation guide for the details.

5
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:
SUITABLE FOR MOUNTINGON NON-COMBUSTIBLE SURFACE ONLY.
Install the unit by screwing three screws
⚫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

6
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.
Model
Typical
Amperage
Battery
Capacity
Wire Size
Ring Terminal
Torque
Value
Cable
mm2
Dimensions
D(mm)
L(mm)
4048
66A
200AH
1*4AWG
22
6.4
33.2
2~3Nm
2*8 AWG
14
6.4
29.2
5048
87A
200AH
1*4AWG
22
6.4
33.2
2~3Nm
2*8 AWG
14
6.4
29.2
Please follow below steps to implement battery connection:
1. Fit recommended cable lugs to battery cables.
2. 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.
Ring terminal:

7
3. 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.
WARNING: Shock Hazard
Installation must be performed with care due to high battery voltage in series.
CAUTION!! Do not place anything between the flat part of the inverter terminal and
the ring terminal. Otherwise, overheating may occur.
CAUTION!! Do not apply anti-oxidant substance on the terminals before
terminals are connected tightly.
CAUTION!! Before making the final DC connection or closing DC
breaker/isolator, be sure positive (+) must be connected to positive (+) and
negative (-) must be connected to negative (-).

8
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 forAC wires
Model
Gauge
Torque Value
4KVA
10AWG
1.4~1.6Nm
5KVA
8AWG
1.4~1.6Nm
Please follow below steps to implementAC input/output connection:
1. Before making AC input/output connection, be sure to open DC protector or disconnector first.
2. Remove insulation sleeve 10mm for six conductors. And shorten phase L and neutral conductor
N 3mm.
3. Insert AC input wires according to polarities indicated on terminal block and tighten the
terminal screws. Be sure to connect PE protective conductor ( ) first.
WARNING:
Be sure to thatAC power source is disconnected before attempting to hardwire it to the unit.
4. Then, insert AC output wires according to polarities indicated on terminal block and tighten
terminal screws.
Be sure to connect PE protective conductor ( )first.
Ground (yellow-green)
L
LINE (brown or black)
N
Neutral (blue)
Ground (yellow-green)
L LINE (brown or black)
N
Neutral (blue)

9
5. 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.
Model
TypicalAmperage
Cable Size
Torque
4048/60A
5048/60A
60A
8 AWG
1.4~1.6Nm
4048/80A
5048/80A
80A
6 AWG
2.0~2.4Nm
PV Module Selection:
When selecting PV modules, please be sure to consider below parameters:
1. Open circuit Voltage (Voc) of PV array can not exceed 145Vdc in the coldest condition.
2. Open circuit Voltage (Voc) of PV array needs to be higher than minimum battery voltage
Solar Charging Mode
INVERTER MODEL
4048/60A 5048/60A
4048/80A 5048/80A
Max. PVArray Open Circuit Voltage
145Vdc
PVArray MPPT Voltage Range
64~130Vdc
Min. battery voltage for PV charge
34Vdc
Please follow below steps to implement PV module connection:
1. Remove insulation sleeve 10 mm for positive and negative conductors
2. Check correct polarity of connection from PV array to PV input

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3. Make sure the wires are securely connected
Recommended PV module configuration
PV Module Spec.（reference）
Risen Energy RSM60-6-270P
-270W
-Vmp:30.67Vdc
-Imp:8.79A
-Voc:37.88Vdc
-Isc:9.31A
Inverter Model
Q’ty of modules
Array output
4048/60A
5048/60A
3S 5P
15 Panels
4050 Watt
Voc 113.64 V
Isc 46.55 A
4048/80A
5048/80A
3S 6P
18 Panels
4860 Watt
Voc 113.64 V
Isc 55.86 A
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

11
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.
Unit status
Condition
NC&C
NO&C
Power Off
Unit is off and no output is powered.
Close
Open
Power On
output is powered from “AC in”
Close
Open
Output is
powered from
Battery or
Solar.
Program 01
set as “AC
in”
Battery voltage<Low DC
warning voltage
Open
Close
Battery voltage>Setting value
in Program 21 or battery
charging reaches floating stage
Close
Open
Program
01is set as
SBU, SUB,
solar first
Battery voltage<Setting value
in Program 20
Open
Close
Battery voltage>Setting value
in Program 21 or battery
charging reaches floating stage
Close
Open
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.
Dry
contact
port:

12
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
LED Indicator
Messages
AC/INV
Green
Solid On
Output is powered byAC in Line mode.

13
Flashing
Output is powered by battery or PV in battery mode.
CHG
Yellow
Flashing
Battery is charging or discharging.
FAULT
Red
Solid On
Fault occurs in the inverter.
Flashing
Warning condition occurs in the inverter.
Function Keys
Function Keys
Description.
MENU
Enter or exit setting mode go to previous selection.
UP
Increase the setting data.
DOWN
Decrease the setting data.
ENTER
Hold 2s to enter setting mode. Press to confirm the selection and move to next
selection.
LCD Display Icons
Icon
Function description
Input Source Information and Output Information
Indicates the AC information
Indicates the DC information
Indicate input voltage, input frequency, PV voltage, battery voltage and charger
current. Indicate output voltage, output frequency, load in VA, load in Watt and
discharging current.
Configuration Program and Fault Information
Indicates the setting programs
Indicates the warning and fault codes.
Warning: flashing with warning code.
Fault: lighting with fault code.
Battery Information
Indicates battery level by 0-24%, 25-49%, 50-74% and 75-100% in battery
mode and charging status in line mode.

14
InAC mode, it will present battery charging status.
Status
Battery voltage
LCD Display
Constant Current
mode/Constant Voltage
mode
<2V/cell
4 bars will flash in turns
2~2.083v/cell
Bottom bar solid, three top bars flashing.
2.083~2.167V/cell
Bottom two bars solid, two top bars will
flash in turns.
>2.167V/cell
Bottom three bars solid, top bar will flash.
Batteries are fully charged.
4 bars solid.
In battery mode, it will present battery capacity.
Load Percentage
Battery Voltage
LCD Display
Load >50%
<1.717V/cell
1.717V/cell~1.8V/cell
1.8~1.883V/cell
>1.883 V/cell
50%> Load>20%
<1.817V/cell
1.817V/cell~1.9V/cell
1.9 V/cell ~1.983V/cell
>1.983 V/cell
Load<20%
<1.867V/cell
1.867V/cell~1.95V/cell
1.95V/cell~2.033V/cell
>2.033 V/cell
Load Information
Indicates overload.
Indicates the load level by 0-24%, 25-50%, 50-74% and 75-100%.
0%~25%
25%~50%
50%~75%
75%~100%
Mode Operation Information

15
Indicates unit connects to the mains.
Indicates unit connects to the PV panel.
Indicates load is supplied by “AC in”power.
Indicates the solar charger circuit is working.
Indicates the DC/AC inverter circuit is working.
Mute Operation
Indicates unit alarm is disabled.
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:
Pro
gra
m
Description
Selectable option
00
Exit setting mode
Escape
01
Output source
priority selection
(default)
Solar provides power to the loads as first priority.
If solar energy is not sufficient to power all
connected loads, AC energy will supply power to
the loads at the same time. The battery energy will
supply power to the load only if AC power is
unavailable. If solar power is unavailable, AC will
charge the battery until the battery voltage reaches
setting in point 21. If solar power is available, but
the battery voltage is lower than the setting in
point 20, AC will charge the battery until the
battery voltage reaches the setting in point 20.
Solar energy provides power to the loads as first
priority. If solar energy is not sufficient to power
all connected loads, the battery will supply power
to the loads at the same time. AC provides power
to the loads only when battery voltage drops to
either low-level warning voltage or the setting in
point 20 or solar and battery is not sufficient. The
battery energy will supply power to the load in the
condition of the AC is unavailable or the battery
voltage is higher than the setting in point 21

16
(when BLU is selected in point 5) or program
20(when LBU is selected in point 5). If solar
power is available, but the battery voltage is lower
than the setting in point 20, the AC will charge the
battery until the battery voltage reaches the setting
point in program 20.
Solar energy provides power to the loads as first
priority.
If battery voltage has been higher than the setting
point in program 21 for 5 minutes, and the solar
energy has been available for 5 minutes too, the
inverter will turn to battery mode, solar and
battery will provide power to the loads at the
same time.
When the battery voltage drops to the setting in
point 20, the inverter will turn to bypass mode,
AC will provides power to the load only, and
solar power will charge only the battery.
AC will provide power to the loads as first
priority. Solar and battery energy will provide
power to the loads only when AC power is not
available.
02
AC input voltage
range
Appliances (default)
If selected, acceptable AC input voltage range
will be within 90-280VAC.
UPS
If selected, acceptable AC input voltage range
will be within 170-280VAC.
GEN
When the user uses the device to connect the
generator, select the generator mode.
VDE
If selected, acceptable AC input voltage range
will conform to VDE4105 (184VAC-253VAC)
03
Output voltage
Set the output voltage, (220VAC-240VAC)
04
Output frequency
50HZ (default)
60HZ
05
Solar supply
priority
(default)
Solar energy provides power to charge battery as
first priority.
When AC is available, if the battery voltage is
lower than the setting in point 21, solar energy
will not supply to the load it will only charge the

17
battery. If the battery voltage is higher than the
setting point in program 21, the solar energy will
supply to the load and recharge the battery.
Solar energy provides power to the loads as first
priority
If the battery voltage is lower than the setting in
point 20, solar energy will not supply power to the
load, it will only charge the battery. If the battery
voltage is higher than the setting in point 20, solar
energy will supply to the load and recharge the
battery.
06
Overload bypass:
The unit will
transfer to line
mode if overload
occurs in battery
mode.
Bypass disabled
Bypass enabled (default)
07
Auto restart when
overload occurs
Restart disabled
Restart enabled
08
Auto restart when
over temperature
occurs
Restart disabled
Restart enabled
10
Charger source
priority: To
configure charger
source priority
If this inverter/charger is working in Line, Standby or Fault mode, charger
source can be programmed as below:
Solar first
Solar energy will charge battery as first priority.
AC will charge the battery only when solar energy
is not available.
Solar and “AC in”
Solar energy and AC will charge battery at the
same time.
Only Solar
Solar energy will be the only source to charge the
battery
If this inverter/charger is working in Battery mode or Power saving mode,
only solar energy can charge the battery. Solar energy will charge battery if it's
available and sufficient.
11
Maximum total
charging current:
Solar and AC input
60A model (default)
Setting range is from 1 A to 120A.
Increment of each click is 1A.

18
80A model (default)
Setting range is from 1 A to 140A.
Increment of each click is 1A.
13
Maximum AC
charging current
30A model (default)
Setting range is from 1Ato 60A.
Increment of each click is 1A.
14
Battery type
AGM (default) Flooded
GEL LEAD
Lithium Ion User-Defined
If "User-Defined" or “LI”is selected, battery charge voltage and
low DC cut-off voltage can be set up in program 17, 18 and 19.
17
Bulk charging voltage
(C.V voltage)
48V model default setting: 56.4V
If self-defined is selected in program 14, this program can be set
up. Setting range is from 48.0V to 58.4V for 48Vdc model.
Increment of each click is 0.1V
18
Floating charging
voltage
48V model default setting: 54.0V
If self-defined is selected in program 14, this program can be set
up. Setting range is from 48.0V to 58.4V for 48Vdc model.
Increment of each click is 0.1V
19
Low DC cut off
battery voltage setting
48V model default setting: 40.8V
If self-defined is selected in program 14, this program can be set
up. Setting range is from 40.0V to 48.0V for 48Vdc model.
Increment of each click is 0.1V. Low DC cut-off voltage will be
fixed to setting value no matter what percentage of load is
connected.
20
Battery stop
discharging voltage
when AC is available
Available options for 48V models:
46.0V (default)
Setting range is from 44.0V
to 58.0V.
Increment of each click is

19
0.1V
21
Battery stop charging
voltage when AC is
available
Available options for 48V models:
54.0V (default)
Setting range is from 44.0V
to 58.0V.
Increment of each click is 0.
1V
22
Auto turn page
(default)
If selected, the display screen
will auto turn the display
page.
If selected, the display screen
will stay at latest screen user
finally switches.
23
Backlight control
Backlight on
Backlight off (default)
24
Alarm control
Alarm on (default)
Alarm off
25
Beeps while primary source
is interrupted
Alarm on
Alarm off (default)
27
Record Fault code
Record enable(default)
Record disable
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.
(default)
Reset setting disable