maximo PV2024 HM User manual

maximo
USER’S MANUAL
SOLAR INVERTER
PV2024 HM &
PV3024 HM
Version 10/08/2018

Table Of Contents
ABOUT THIS MANUAL .....................................................................................................................................3
Purpose............................................................................................................................................................3
Scope...............................................................................................................................................................3
SAFETY INSTRUCTIONS..................................................................................................................................3
INTRODUCTION ...............................................................................................................................................4
Features...........................................................................................................................................................4
Basic System Architecture...............................................................................................................................4
Product Overview.............................................................................................................................................5
INSTALLATION...................................................................................................................................................6
Unpacking and Inspection................................................................................................................................6
Preparation ......................................................................................................................................................6
Mounting the Unit.............................................................................................................................................6
Battery Connection ..........................................................................................................................................7
AC Input/Output Connection............................................................................................................................9
PV Connection...............................................................................................................................................10
Final Assembly...............................................................................................................................................11
Commuication connection ............................................................................................................................. 11
Dry Contact Signal .........................................................................................................................................12
OPERATION .....................................................................................................................................................12
Power ON/OFF ..................................................................................................................................................
Operation and Display Panel.........................................................................................................................12
LCD Display Icons .........................................................................................................................................14
LCD setting ....................................................................................................................................................14
Fault Reference Code....................................................................................................................................19
Warning Indicator...........................................................................................................................................21
Operating State Description...........................................................................................................................21
Disply setting..................................................................................................................................................21
SPECIFICATIONS ...........................................................................................................................................24
Table 1 Line Mode Specifications ...................................................................................................................24
Table 2 Inverter Mode Specifications .............................................................................................................25
Table 3 Charge Mode Specifications ..............................................................................................................26
Table 4 General Specifications .......................................................................................................................27
TROUBLE SHOOTING.....................................................................................................................................28
Appendix: Approximate Back-up Time Table ...........................................................................................29

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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 using the unit, read all instructions and cautionary markings on the unit, the batteries and all
appropriate sections of this manual.
2. CAUTION --To reduce risk of injury, charge only deep-cycle lead acid type rechargeable batteries.
Other types of batteries may burst, causing personal injury and damage.
3. Do not disassemble the unit. 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 can install this device with battery.
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/charger.
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. Fuses (4 pieces of 40A, 32VDC for 2KVA and 6 pieces of 40A, 32VDC for 3KVA) are provided as
over-current protection for the battery supply.
11. GROUNDING INSTRUCTIONS -This inverter/charger 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 are able to service this device. If errors still persist after
following troubleshooting table, please send this inverter/charger back to local dealer or service center
for maintenance.

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INTRODUCTION
This is a multi-function inverter/charger, combining functions of inverter, solar charger and battery charger to
offer uninterruptible power support with portable size. 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
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
IP20 rating, avoid direct sunlight
Basic System Architecture
The following illustration shows basic application for this inverter/charger. It also includes following devices to
have a complete running system:
Generator
PV modules (option)
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

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Product Overview
2-3KVA single model
NOTE: For parallel model installation and Operation,
please check separate parallel installation guide for
the details.
1. LCD display
2. Status indicator
3. Discharging/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. RS-485 communication port
13. USB
15. Dry Contact

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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
Before connecting all wirings, please take off bottom cover by removing two 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.
⚫Mount on a solid surface, indoor IP20, avoid direct sunlight
⚫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. 200 mm to the side and approx. 300 mm above
and below the unit.
⚫The ambient temperature should be between 0°C and 55°C
to ensure optimal operation.
⚫The recommended installation position is to be adhered to
the wall vertically.
⚫Be sure to keep other objects and surfaces as shown in the
below diagram to guarantee sufficient heat dissipation and
to have enough space for removing wires.
SUITABLE FOR MOUNTING ON CONCRETE OR
OTHER NON-COMBUSTIBLE SURFACE ONLY.

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Install the unit by screwing three screws.
Battery Connection
CAUTION: To safety operation and regulation compliance, it’s requested to install a separate DC over-current
protector or disconnect device between battery and inverter. It may not be requested to have a disconnect
device in some applications, however, it’s still requested to have over-current protection installed. Please refer
to typical amperage in below table as required fuse or beaker 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. To reduce risk of injury, please use the
proper recommended cable and terminal size as below.
Recommended battery cable and terminal size:
Model
Typical
Amperage
Battery
capacity
Wire Size
Ring Terminal
Torque
value
Cable mm2
Dimensions
D(mm)
L(mm)
2024
66A
100AH
1*6AWG
14
6.4
29.2
2~ 3 Nm
200AH
2*10AWG
8
6.4
23.8
2~ 3 Nm
3024
100A
100AH
1*4AWG
22
6.4
33.2
2~ 3 Nm
200AH
2*8AWG
14
6.4
29.2
2~ 3 Nm
Please follow below steps to implement battery connection:
1. Assemble battery ring terminal based on recommended battery cable and terminal size.
2. Connect all battery packs as below chart, It’s suggested to connect at least 100Ah capacity battery for
2KVA/3KVA model.

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3. Insert the ring terminal of battery cable flatly into battery connector of inverter and make sure the bolts are
tightened with torque of 2-3 Nm. Make sure polarity at both the battery and the inverter/charge is correctly
connected and ring terminals are tightly screwed to the battery terminals.
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/disconnector, be sure
DC (+) must be connected to DC (+) and DC (-) must be connected to DC (-).

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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 20A
for 2KVA, 32A for 3KVA.
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 qualified personnel.
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
Model
Gauge
Torque Value
2024
14 AWG
0.8~ 1.0Nm
3024
12 AWG
1.2~ 1.6Nm
Please follow below steps to implement AC 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 3 mm.
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.
→Ground (yellow-green)
L→LINE (brown or black)
N→Neutral (blue)
WARNING:
Be sure that AC 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)

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5. Make sure the wires are securely connected.
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 separately a DC circuit breaker 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 for PV
module connection. To reduce risk of injury, please use the proper recommended cable size as below.
Model
Typical Amperage
Cable Size
Torque
2024/40A
3024/40A
40A
8 AWG
1.4~1.6Nm
2024/60A
3024/60A
60A
8 AWG
1.4~1.6Nm
PV Module Selection:
When selecting proper PV modules, please be sure to consider below parameters:
1. Open circuit Voltage (Voc) of PV modules not exceeds max. PV array open circuit voltage of inverter.
2. Open circuit Voltage (Voc) of PV modules should be higher than min. battery voltage.
Solar Charging Mode
INVERTER MODEL
2024/40A
3024/40A
2024/60A
3024/60A
Max. PV Array Open Circuit Voltage
145Vdc
PV Array MPPT Voltage Range
30~130Vdc
Min. battery voltage for PV charge
17Vdc
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 cable from PV modules and PV input
connectors. Then, connect positive pole (+) of connection cable to positive
pole (+) of PV input connector. Connect negative pole (-) of connection cable
to negative pole (-) of PV input connector.
CAUTION: Important
Be sure to connect AC wires with correct polarity. If L and N wires are connected reversely, it may cause AC
short-circuit when these inverters are worked in parallel operation.