Humless UL 9540 User manual
Version: 1.2 November 2022 © Humless 2022
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Table Of Contents
Chapter
Description
Page
1.
Introduction ………………………………………………………………………………..………
4
2.
Important Safety Information …………………………………………………………………….
5
3.
Unpacking & Overview …………………………………………………………………………...
7
3.1
Packing List ………………………………………………………………………………………..
7
3.2
Product Overview …………………………………………………………………………………
7
4.
Installation …………………………………………………………………………………………
8
4.1
Precautions ………………………………………………………………………………………..
8
4.2
Selecting Mounting Location …………………………………………………………………….
8
4.3
Mounting the Unit …………………………………………………………………………………
8
5.
Grid (Utility) Connection ………………………………………………………………………….
9
5.1
Preparation ………………………………………………………………………………………...
9
5.2
Connecting to the AC Utility ……………………………………………………………………..
10
6.
Generator connection …………………………………………………………………………….
10
6.1
Preparation ………………………………………………………………………………………...
11
6.2
Connecting to the Generator Input ……………………………………………………………...
11
7.
PV Module (DC) Connection …………………………………………………………………….
12
8.
Battery Connection ……………………………………………………………………………….
15
9.
Load (AC Output) Connection …………………………………………………………………...
16
9.1
Preparation ………………………………………………………………………………………...
16
9.2
Connecting the AC Output ……………………………………………………………………….
17
10.
Communication ……………………………………………………………………………………
18
10.1
Pin Assignment for RS-232 Communication Port ……………………………………………..
19
10.2
Pin Assignment for BMS Communication Port ………………………………………………...
19
10.3
Dry Contact Signal ……………………………………………………………………………….
19
11.
Commissioning ……………………………………………………………………………………
21
12.
Initial Setup ………………………………………………………………………………………..
22
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13.
Operation …………………………………………………………………………………………..
33
13.1
Interface ……………………………………………………………………………………………
33
13.2
Touch screen Information ….…………………………………………………………………….
33
13.3
Touch Screen Function Keys ………………………………………………………………….
34
13.4
LCD Settings ………………………………………………………………………………………
36
13.5
Query Menu Operation …………………………………………………………………………...
44
13.6
Operation Mode & Display ……………………………………………………………………….
50
14.
Charging Management …………………………………………………………………………...
55
15.
Maintenance & Cleaning ………………………………………………………………………...
57
16.
Trouble Shooting ………………………………………………………………………………….
58
16.1
Warnings …..……………………………………………………………………………………….
58
16.2
Fault reference Codes ……………………………………………………………………………
59
17.
Specifications ……………………………………………………………………………………...
60
Appendix I: Parallel Installation Guide ………………………………………………………….
62
Appendix II: Wi-Fi Operation Guide …………………………………………………………….
69
Version: 1.2 November 2022 © Humless 2022
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1. Introduction
This hybrid PV Inverter can provide power to connected loads by utilizing PV power, utility power, and battery power.
Hybrid Inverter
Depending on different power situations, this hybrid Inverter is designed to generate continuous power from PV solar
modules (solar panels), batteries, and the utility. When MPP input voltage of PV modules are within an acceptable
range (see specification for the details), this Inverter is able to generate power to feed the Grid (utility) and charge the
battery. This Inverter is only compatible with PV module types of single crystalline and polycrystalline. Do not connect
any PV array types other than these two types of PV modules to the Inverter. Do not connect the positive or negative
terminal of the solar panel to the ground. See Figure 1 for a simple diagram of a typical solar system with this hybrid
Inverter.
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4. Installation
4.1. Precautions
This hybrid Inverter is designed for indoor or outdoor use (IP65), please make sure the installation site meets the below
conditions:
●Do not install in direct sunlight.
●Do not install near flammable liquids.
●Do not install near explosive materials.
●Do not install in a windy or drafty area.
●Do not install where there is the possibility of contact with snow.
●Do not install near an antenna or antenna cable.
●Do not install more than 6500ft (2000m) above sea level.
●Do not install in an area exposed to the elements.
●Do not install in an area with a humidity greater than 95%.
4.2. Selecting Mounting Location
●Select a vertical wall with the appropriate load-bearing capacity, it should also be non-flammable.
●The ambient temperature should be between 77F - 140F (25C-60C) in order to ensure optimal operation.
●Ensure that there is sufficient clearance between components as illustrated in order to ensure sufficient heat
dissipation and adequate access to wiring. Clearances should be 20 inches (50cm) on the top, bottom, and
sides and 40 inches (100cm) to the front.
4.3. Mounting the Unit
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5. Grid (Utility) Connection
5-1. Preparation
NOTE 1: The overvoltage category of the AC input is III. It should be connected to the power distribution.
NOTE 2: Before connecting to the Grid, please install a separate AC breaker between the Inverter and the Grid. This
will ensure the Inverter can be safely disconnected during maintenance and fully protected from overcurrent. The
recommended size of the AC breaker is 40A/300V.
WARNING! It is extremely important for system safety and efficient operation to use the appropriate cable for the Grid
(utility) connection. To reduce the risk of injury, please use the proper recommended cable size as below.
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Suggested cable requirement for AC wire
Nominal Grid Voltage
120VAC per phase
Conductor cross-section (mm2)
10 - 16
AWG no.
8 - 6
5-2. Connecting to the AC Utility
Please follow the below steps to implement an AC input connection:
1. Before making an AC input connection, be sure to open the DC protector or disconnector first.
2. Remove the insulation sleeve 7mm for four conductors.
3. Insert AC input wires accordingto the polarities indicated onthe terminal block and tightenthe terminal screws.
6. Generator Connection
There are two functions with this port:
●One allows generator input as power source
●The other allows second AC output to connect. This output can be turned On or Off by setting
the battery voltage.
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