Srne HFP4850S80-145 User manual

All-in-one solar charge inverter V4.0 1
All-in-one solar charger inverter
User Manual
Product models:
HFP4850S80-145 | HFP4835U80-145

All-in-one solar charge inverter V4.0 2
Important safety instructions
Please keep this manual for future use.
This manual contains all safety, installation and operating instructions for the HFP Series all-in-one solar
charge inverter.
Please read all instructions and precautions in the manual carefully before installation and use.
Non-safety voltage exists inside the all-in-one solar charge inverter. To avoid personal injury, users
shall not disassemble the all-in-one solar charge inverter themselves. Contact our professional
maintenance personnel if there is a need for repair.
Do not place the all-in-one solar charge inverter within the reach of children.
Do not install the all-in-one solar charge inverter in harsh environments such as moist, oily,
flammable or explosive, or heavily dusty areas.
The mains input and AC output are high voltage, so please do not touch the wiring terminals.
The housing of the all-in-one solar charge inverter is hot when it is working. Do not touch it.
Do not open the terminal protective cover when the all-in-one solar charge inverter is working.
It is recommended to attach proper fuse or circuit breaker to the outside of the all-in-one solar
charge inverter.
Always disconnect the fuse or circuit breaker near the terminals of PV array, mains and battery before
installing and adjusting the wiring of the all-in-one solar charge inverter.
After installation, check that all wire connections are tight to avoid heat accumulation due to poor
connection, which is dangerous.
The all-in-one solar charge inverter is off-grid. It is necessary to confirm that it is the only input device
for load, and it is forbidden to use it in parallel with other input AC power to avoid damage.

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CONTENTS
1. GENERAL INFORMATION..............................................................................................4
1.1 PRODUCT OVERVIEW AND FEATURES .................................................................................. 4
1.2 BASIC SYSTEM INTRODUCTION .......................................................................................... 5
1.3 APPEARANCE ............................................................................................................... 6
1.4 DIMENSION DRAWING.................................................................................................... 7
2. INSTALLATION INSTRUCTIONS ...................................................................................... 8
2.1 INSTALLATION PRECAUTIONS ............................................................................................ 8
2.2 WIRING SPECIFICATIONS AND CIRCUIT BREAKER SELECTION...................................................... 9
2.3 INSTALLATION AND WIRING ........................................................................................... 11
2.4 INSTALLATION AND WIRING ........................................................................................... 17
2.4.1 INTRODUCTION........................................................................................................ 17
2.4.2 PRECAUTIONS FOR CONNECTING THE PARALLEL CONNECTING LINES ...................................... 17
2.4.3 SCHEMATIC DIAGRAM OF PARALLEL CONNECTION IN SINGLE PHASE....................................... 19
2.4.4 SCHEMATIC DIAGRAM OF PARALLEL CONNECTION IN SPILIT PHASE ........................................ 22
3. OPERATING MODES .................................................................................................... 33
3.1 CHARGING MODE ........................................................................................................ 33
3.2 OUTPUT MODE........................................................................................................... 34
4. LCD SCREEN OPERATING INSTRUCTIONS ..................................................................... 35
4.1 OPERATION AND DISPLAY PANEL .................................................................................... 35
4.2 SETUP PARAMETERS DESCRIPTION .................................................................................. 39
4.3 BATTERY TYPE PARAMETERS .......................................................................................... 46
5. OTHER FUNCTIONS ..................................................................................................... 48
5.1 DRY NODE ................................................................................................................. 48
5.2 RS485 COMMUNICATION PORT ..................................................................................... 48
5.3 USB COMMUNICATION PORT......................................................................................... 48
5.4 PARALLEL COMMUNICATION FUNCTION (PARALLEL OPERATION ONLY)...................................... 49
5.5 CURRENT SHARING DETECTION FUNCTION (PARALLEL OPERATION ONLY) .................................. 49
6. PROTECTION .............................................................................................................. 50
6.1 PROTECTIONS PROVIDED ............................................................................................... 50
6.2 FAULT CODE............................................................................................................... 52
6.3 HANDLING MEASURES FOR PART OF FAULTS....................................................................... 56
7. SYSTEM MAINTENANCE ............................................................................................. 57
8. TECHNICAL PARAMETERS........................................................................................... 58

All-in-one solar charge inverter V4.0 4
1. General information
1.1 Product overview and features
HFP series is a new all-in-one hybrid solar charge inverter, which integrates solar energy storage &
means charging energy storage and AC sine wave output. Thanks to DSP control and advanced control
algorithm, it has high response speed, high reliability and high industrial standard. Four charging modes
are optional, i.e. Only Solar, Mains Priority, Solar Priority and Mains & Solar hybrid charging; and two
output modes are available, i.e. Inverter and Mains, to meet different application requirements.
The solar charging module applies the latest optimized MPPT technology to quickly track the maximum
power point of the PV array in any environment and obtain the maximum energy of the solar panel in
real time.
Through a state of the art control algorithm, the AC-DC charging module realizes fully digital voltage
and current double closed loop control, with high control precision in a small volume. Wide AC voltage
input range and complete input/output protections are designed for stable and reliable battery charging
and protection.
Based on full-digital intelligent design, the DC-AC inverter module employs advanced SPWM technology
and outputs pure sine wave to convert DC into AC. It is ideal for AC loads such as household appliances,
power tools, industrial equipment, and electronic audio and video equipment. The product comes with
a segment LCD display design which allows real-time display of the operating data and status of the
system. Comprehensive electronic protections keep the entire system safer and more stable.
Features:
1. Full digital voltage and current double closed loop control, advanced SPWM technology, output
of pure sine wave.
2. Two output modes: mains bypass and inverter output; uninterrupted power supply.
3. Available in 4 charging modes: Only Solar, Mains Priority, Solar Priority and Mains & Solar hybrid
charging.
4. Advanced MPPT technology with an efficiency of 99.9%.
5. Designed with a LCD screen and 3 LED indicators for dynamic display of system data and
operating status.
6. ON/OFF rocker switch for AC output control.
7. Power saving mode available to reduce no-load loss.
8. Intelligent variable speed fan to efficiently dissipate heat and extend system life.
9. Lithium battery activation by PV solar or mains, allowing access of lead-acid battery and lithium
battery.
10. 360 °all-round protection with a number of protection functions.
11. Complete protections, including short circuit protection, over voltage and under voltage
protection, overload protection, reverse protection, etc.

All-in-one solar charge inverter V4.0 5
1.2 Basic system introduction
The figure below shows the system application scenario of this product. A complete system consists of
the following parts:
1. PV module: Convert light energy into DC power, and charge the battery through the all-in-one
solar charge inverter, or directly invert into AC power to drive the load.
2. Mains or generator: Connected at the AC input, to power the load while charging the battery. If
the mains or generator is not connected, the system can also operate normally, and the load is powered
by the battery and PV module.
3. Battery: Provided to ensure normal power supply to the system loads when solar energy is
insufficient and the Mains is not connected.
4. Household load: Allow connection of various household and office loads, including refrigerators,
lamps, TVs, fans and air conditioners.
5. All-in-one solar charge inverter: The energy conversion unit of the whole system.
Specific system wiring method depends on the actual application scenario.

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1.3 Appearance
①
Overload protector
⑩
RS485-1
communication port
②
ON/OFF rocker switch
⑪
Dry contact port
③
AC input port
⑫
Cooling fan
④
AC output port
⑬
Battery port
⑤
Grounding screw hold
⑭
Cooling fan
⑥
RS485-2 communication port
⑮
PV port
⑦
Current sharing port
(parallel module only)
⑯
Touch the key lightly
⑧
Parallel communication port
(parallel module only)
⑰
Indicator light
⑨
USB communication port
⑱
LCD screen

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1.4Dimension drawing

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2. Installation instructions
2.1 Installation precautions
Please read this manual carefully prior to installation to familiarize yourself with the installation
steps.
Be very careful when installing the battery. Wear safety goggles when installing a lead-acid
liquid battery. Once coming into contact with the battery acid, rinse with clean water timely.
Do not place metal objects near the battery to prevent short-circuit of the battery.
Acid gas may be generated when the battery is charged. So, please ensure good ventilation.
When installing the cabinet, be sure to leave enough space around the all-in-one solar charge
inverter for heat dissipation. Do not install the all-in-one solar charge inverter and lead-acid
battery in the same cabinet to avoid corrosion by acid gas generated during battery operation.
Only the battery that meets the requirements of the all-in-one unit can be charged.
Poorly connected connections and corroded wires may cause great heat which will melt the
wire insulation, burn the surrounding materials, and even cause fires. So, make sure the
connectors have been tightened, and the wires are secured with ties to avoid looseness of
connections caused by shaking of wires during mobile application.
The system connection wires are selected according to a current density of not more than 5
A/mm2.
Avoid direct sunlight and rainwater infiltration for outdoor installation.
Even after the power is turned off, there is still high voltage inside the unit. Do not open or
touch the internal components, and avoid related operations until the capacitor completely
discharges.
Do not install the all-in-one solar charge inverter in harsh environments such as moist, oily,
flammable or explosive, or heavily dusty areas.
Polarity at the battery input end of this product shall not be reversed, otherwise it may
damage the device or cause unpredictable danger.
The mains input and AC output are high voltage, so please do not touch the wiring terminals.
When the fan is working, do not touch it to prevent injury.
Load equipment input power needs to confirm that this all-in-one solar charge inverter is the
only input device, and it is forbidden to use in parallel with other input AC power to avoid
damage. It is necessary to confirm that the solar charge inverter is the only input device for
load equipment, and it is forbidden to use it in parallel with other input AC power to avoid
damage.

All-in-one solar charge inverter V4.0 9
2.2 Wiring specifications and circuit breaker selection
Wiring and installation must comply with national and local electrical codes.
Recommended PV array wiring specifications and circuit breaker selection: Since the output current of
the PV array is affected by the type, connection method and illumination angle of the PV module, the
minimum wire diameter of the PV array is calculated according to its short-circuit current; refer to the
short-circuit current value in the PV module specification (the short-circuit current is constant when the
PV modules are connected in series; the short-circuit current is the sum of the short-circuit currents of
all PV modules connected in parallel); the short-circuit current of the PV array shall not exceed the
maximum input current.
Refer to the table below for PV input wire diameter and switch:
Models
Recommended PV
wiring diameter
Maximum PV
input current
Recommended air switch or
circuit breaker type
HFP4850S80-145
10mm2/7AWG
50A
2P—63A
HFP4835U80-145
10mm2/7AWG
50A
2P—63A
Note: The voltage in series shall not exceed the maximum PV input open circuit voltage.
Refer to the table below for recommended AC input wire diameter and switch:
Models
Recommended AC
input wiring diameter
Maximum
bypass input
current
Recommended air switch or
circuit breaker type
HFP4850S80-145
10mm2/7AWG
40A
2P—40A
HFP4835U80-145
10mm2/7AWG
40A
2P—40A
Note: There is already an appropriate circuit breaker at the Mains input wiring terminal, so it is
not necessary to add one more.

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Recommended battery input wire diameter and switch selection
Models
Recommended
battery wiring
diameter
Rated
battery
discharge
current
Maximum
charge
current
Recommended air
switch or circuit
breaker type
HFP4850S80-145
30mm2/2AWG
125A
140A
2P—160A
HFP4835U80-145
25mm2/3AWG
85A
120A
2P—140A
Recommended AC output wiring specifications and circuit breaker selection
Models
Recommended
AC output
wiring
diameter
Rated inverter
AC output
current
Maximum
bypass output
current
Recommended air
switch or circuit
breaker type
HFP4850S80-145
10mm2/7AW
G
22A
40A
2P—40A
HFP4835U80-145
10mm2/7AW
30A
40A
2P—40A
Note: The wiring diameter is for reference only. If the distance between the PV array and the all-in-one
solar charge inverter or the distance between the all-in-one solar charge inverter and the battery is
relatively long, using a thicker wire can reduce the voltage drop to improve system performance.
Note: The above are only recommended wiring diameter and circuit breaker. Please select the
appropriate wiring diameter and circuit breaker according to actual situations.

All-in-one solar charge inverter V4.0 11
2.3 Installation and wiring
Installation steps:：
Step 1: Determine the installation position and the space for heat dissipation. Determine the installation
position of the all-in-one solar charge inverter, such as wall surface; when installing the all-in-one solar
charge inverter, ensure that there is enough air flowing through the heat sink, and space of at least 200m
to the left and right air outlets of the inverter shall be left to ensure natural convection heat dissipation.
Refer to the installation diagram of the whole machine as above.
Warning: Danger of explosion! Never install the all-in-one solar charge inverter and lead-acid
battery in the same confined space! Also do not install in a confined place where battery gas may
collect.

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Step 2: Remove the terminal cover
Step3: Wiring
AC input / output wiring method:
①Prior to AC input/output wiring, disconnect the external circuit breaker and confirm that the
wire used is thick enough. Please refer to Section 2.2 “Wiring Specifications and Circuit Breaker
Selection”;
②Properly connect the AC input wire according to the wire sequence and terminal position
shown in the figure below. Please connect the ground wire first, and then the live wire and the
neutral wire;

All-in-one solar charge inverter V4.0 13
：Ground L：Live N：Neutral
③Properly connect the AC output wire according to the wire sequence and terminal
position shown in the figure below. Please connect the ground wire first, and then the live
wire and the neutral wire. The ground wire is connected to the grounding screw hole on the
cabinet through the O-type terminal.
：Ground L：Live N：Neutral
Note: The grounding wire shall be as thick as possible (cross-sectional area is not less than 4mm2).
The grounding point shall be as close as possible to the all-in-one solar charge inverter. The
shorter the grounding wire, the better.

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PV input wiring method:
①Prior to wiring, disconnect the external circuit breaker and confirm that the wire used
is thick enough. Please refer to Section 2.2 “Wiring Specifications and Circuit Breaker
Selection”;
②Properly connect the PV input wire according to the wire sequence and terminal
position shown in the figure below.
PV+: PV input positive pole PV-: PV input negative pole
BAT wiring method:
①Prior to wiring, disconnect the external circuit breaker and confirm that the wire used
is thick enough. Please refer to Section 2.2 “Wiring Specifications and Circuit Breaker
Selection”. The BAT wire needs to be connected to the machine through the O-type
terminal. The O-type terminal with an inner diameter of 5 mm is recommended. The O-type
terminal shall firmly press the BAT wire to prevent excessive heat generation caused by
excessive contact resistance;
②Properly connect the BAT wire according to the wire sequence and terminal position
shown in the figure below.

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BAT+: Battery positive electrode BAT-: Battery negative electrode
Warnings:
①Mains input, AC output and PV array will generate high voltage. So, before wiring, be sure to
disconnect the circuit breaker or fuse;
②Be very careful during wiring; do not close the circuit breaker or fuse during wiring, and ensure that
the “+”and “-”pole leads of each component are connected properly; a circuit breaker must be
installed at the battery terminal. Refer to Section 2.2 “Wiring Specifications and Circuit Breaker Selection”
to select a right circuit breaker. Before wiring, be sure to disconnect the circuit breaker to prevent strong
electric sparks and avoid battery short circuit; if the all-in-one solar charge inverter is used in an area
with frequent lightning, it is recommended to install an external lightening arrester at the PV input
terminal.
Step 4: Check if the wiring is correct and firm. In particular, check if the battery polarity is reversed, if the
PV input polarity is reversed and if the AC input is properly connected.

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Step 5: Install the terminals cover.
Step 6: Turn on the all-in-one solar charge inverter
First, close the circuit breaker at the battery terminal, and then turn the rocker switch
on the left side of the machine to the "ON" state. The "AC/INV" indicator flashing
indicates that the inverter is working normally. Close the circuit breakers of the PV
array and the Mains. Finally, turn on AC loads one by one as the AC output is normal
to avoid a protection action caused by a large momentary shock due to simultaneous
turning on the loads simultaneously. Now, the machine goes into a normal
operation according to the set mode.
Note: If power is supplied to different AC loads, it is recommended to first turn on the load with a large
surge current. After the load is stable, turn on the load with a small surge current.
Note: If the all-in-one solar charge inverter does not work properly or the LCD or indicator is abnormal,
refer to Chapter 6 to handle the exceptions.

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2.4 Installation and wiring
2.4.1 Introduction
1. Maximum six all-in-one solar charger inverters can be used for parallel operation.
2. When using the parallel operation function, the following connecting lines (package
accessories) shall be firmly and reliably connected:
Parallel communication line*1: Current sharing detection line*1:
2.4.2 Precautions for connecting the parallel connecting lines
Warning:
1. Battery wiring:
Parallel connection in single or spilit phase: Ensure that all all-in-one solar charger inverters
are connected to the same battery, with BAT + connected to BAT + , BAT - connected to BAT
-, and that the connection is correct with the same wiring length and line diameter before
power on and start-up, so as to avoid the abnormal operation of parallel system output caused
by wrong connection.
2. AC OUT wiring:
Parallel connection in single phase: Ensure L-to-L, N-to-N and PE-to-PE connection for all
all-in-one solar charger inverters, and that the connection is correct with the same wiring
length and line diameter before power on and start-up, so as to avoid the abnormal operation
of parallel system output caused by wrong connection. For specific wiring, please refer to 2.4.3
Wiring Diagram
Parallel connection in spilit phase: Ensure N-to-N and PE-to-PE connection for all all-in-one
solar charger inverters. TheL lines of all inverters connected to the same phase need to be
connected together. But L lines of different phases cannot be joined together. Other

All-in-one solar charge inverter V4.0 18
connection precautions are the same as parallel connection in single phase. For specific wiring,
please refer to 2.4.4Wiring Diagram
3. AC IN wiring:
Parallel connection in single phase: Ensure L-to-L, N-to-N and PE-to-PE connection for all
all-in-one solar charger inverters, and that the connection is correct with the same wiring
length and line diameter before power on and start-up, so as to avoid the abnormal operation
of parallel system output caused by wrong connection. Meanwhile, it is not allowed to have
multiple different AC source inputs to avoid damage to the external equipment of the inverter.
The consistency and uniqueness of AC source input shall be ensured. For specific wiring, please
refer to 2.4.3 Wiring Diagram.
Parallel connection in spilit phase: Ensure N-to-N and PE-to-PE connection for all all-in-one
solar charger inverters. TheL lines of all inverters connected to the same phase need to be
connected together. But L lines of different phases cannot be joined together. Other
connection precautions are the same as parallel connection in single phase. For specific wiring,
please refer to 2.4.4 Wiring Diagram.
4. Wiring of parallel communication line:
Parallel connection in single or spilit phase: Our company's parallel communication line is a
DB15 standard computer cable with shielding function. Ensure the "one-in-one-out" rule when
connecting each inverter, that is, connect the male connector (out) of this inverter with the
female connector (in) of the inverter to be paralleled. Do not connect the male connector of
the inverter to its female connector. In addition, make sure to tighten the parallel
communication line of each inverter with self-contained end screws of DB15 to avoid the
abnormal operation or damage of the system output caused by the falling off or poor contact
of the parallel communication line.
5. Wiring of current sharing detection line:
Parallel connection in single phase: Our company's current sharing detection line is a twisted
connection line. Ensure the "one-in-one-out" rule when connecting each inverter, that is,
connect the current sharing line of the inverter with the current sharing green port of the

All-in-one solar charge inverter V4.0 19
inverter to be paralleled (choose one port from the two, and there is no mandatory sequence
requirement). The current sharing ports of the inverter cannot be connected to each other. In
addition, make sure that the red and black current sharing connection lines of each inverter
are not manually exchanged, and make sure to tighten the lines with self-contained screws to
avoid the abnormal operation or damage of the system output caused by abnormal parallel
current sharing detection. For specific wiring, please refer to 2.4.3 Wiring Diagram.
Parallel connection in spilit phase: The current sharing detection lines of all inverters
connected to the same phase need to be connected together. But the current sharing
detection lines of different phases cannot be joined together. Other connection precautions
are the same as parallel connection in single phase. For specific wiring, please refer to 2.4.4
Wiring Diagram.
6. Before or after connecting the system, please carefully refer to the following system wiring
diagram to ensure that all wiring is correct and reliable before power on.
7. After the system is wired, powered on and in normal operation, if a new inverter needs to be
connected, make sure to disconnect the battery input, PV input, AC input and AC output, and
that all all-in-one solar charger inverters are powered off before reconnecting into the system.
2.4.3 Schematic diagram of parallel connection in single phase
1. The parallel communication line and current sharing detection line of the all-in-one solar
charger inverter need to be locked with screws after connecting. The schematic diagram is as
follows:
2. In case of parallel operation with multiple inverters, the schematic diagram of parallel
connection is as follows( for U and S series model):
a）Two all-in-one solar charger inverters of the system connected in parallel:

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b）Three all-in-one solar charger inverters of the system connected in parallel: