IPANDEE EXPLORER-T ET4850 User manual

DIMENSIONS 1
SPECIFICATION SUMMARY
Type
ET4850
ET4860
Nominal Battery Voltage
12/24/48V
12/24/48V
Max.PV Open-Circuit Voltage*
150V
150V
Nominal Max.Input Power**
650/1300/2600W
780/1560/3120W
Max.Battery Charging Current
50A
60A
*Array voltage should never exceed this limit.
**These power limits refer to the maximum wattage the MPPT can manage. Higher power arrays can be
used without damaging the controller.

TABLE OF CONCENTS
1.0 Important Safely Instructions 1
2.0 General Information 4
2.1 Features 4
2.2 Attached Accessories 4
2.3 Optional Accessories 5
3.0 Installation Instructions 6
3.1 General Installation Notes 6
3.2 Mounting 7
4.0 Operation 9
4.1 Max Power Point Tracking Technology 9
4.2 Battery Charging 10
4.3 Electrical structure and function description 12
4.4 Status Indications 12
4.5 operate 13
5.0 Trouble Shooting 14
6.0 Technical Specifications 15
Appendix 17

1
1.0 IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS.
This manual contains important safety, installation, and operating for the MPPT solar
controller.
The following symbols are used throughout this manual to indicate potentially
dangerous conditions or mark important safety instructions:
WARNING: Indicates a potentially dangerous condition. Be careful when
performing related operations.
CAUTION: Indicates a critical procedure for safe and proper operation of the
controller.
NOTE: Indicates a procedure or function that is important to the safe and
proper operation of the controller.
Safety Information 0
● Read all of the instructions and cautions in the manual before installation.
● There are no user serviceable parts inside the MPPT. Do not disassemble or
attempt to repair the controller
WARNING: Risk Of Electrical Shock. NO POWER OR ACCESSORY TERMINALS
ARE ELECTRICALLY ISOLATED FROM DC INPUT, AND MAY BE ENERGIZED
WITH HAZARDOUS SOLAR VOLTAGE. UNDER CERTAIN FAULT CONDITIONS, BATTERY
COULD BECOME OVER-CHARGED. TEST BETWEEN ALL TERMINALS AND GROUND
BEFORE TOUCHING.
● External solar and battery disconnects are required.
● Disconnect all sources of power to the controller before installing or adjusting the
MPPT.

2
Installation Safety Precautions 0
WARNING: This unit does not contain GFDI device.
WARNING: The MPPT negative power terminals are common, and must be
grounded as instructions, local codes, and regulations require.
● Install the MPPT in a location that prevents casual contact. The MPPT heatsink
can become very hot during operation.
● Use insulated tools when working with batteries.
● Avoid wearing jewelry during installation.
● The battery bank must be comprised of batteries of same type, make, and age.
● Do not smoke near the battery bank.
● Power connections must remain tight to avoid excessive heating from a loose
connection.
● Use properly sized conductors and circuit interrupters.
● The grounding terminal is located at the bottom of the case.
WARNING: The MPPT controller must be installed by a qualified technician in
accordance with the electrical regulations of the country of installation.
WARNING: Pay attention to the label of the power line when installing the
wiring. Avoid damaging the controller by connecting the wrong line.
WARNING: A means of disconnecting all power supply poles must be
provided. These disconnects must be incorporated in the fixed wiring.
A permanent, reliable earth ground must be established with connection to the
MPPT ground terminal.
The grounding conductor must be secured against any accidental detachment.

3
Battery Safety 0
WARNING: A battery can present a risk of electrical shock or burn from large
amounts of short-circuit current, fire, or explosion from vented gases. Observe
proper precautions.
WARNING: Risk of Explosion. Proper disposal of batteries is required. Do not
dispose of batteries in fire. Refer to local regulations or codes for requirements.
CAUTION: When replacing batteries, use properly specified number, sizes,
types, and ratings based on application and system design.
CAUTION: Do not open or mutilate batteries. Released electrolyte is harmful
to skin, and may be toxic.
● Servicing of batteries should be performed, or supervised, by personnel
knowledgeable about batteries, and the proper safety precautions.
● Be very careful when working with large lead-acid batteries. Wear eye protection
and have fresh water available in case there is contact with the battery acid.
● Remove watches, rings, jewelry and other metal objects before working with
batteries.
● Wear rubber gloves and boots.
● Use tools with insulated handles and avoid placing tools or metal objects on top of
batteries.
● Disconnect charging source prior to connecting or disconnecting battery terminals.
● Determine if battery is inadvertently grounded. If so, remove the source of contact
with ground. Contact with any part of a grounded battery can result in electrical
shock. The likelihood of such a shock can be reduced if battery grounds are
removed during installation and maintenance (applicable to equipment and remote
battery supplies not having a grounded supply circuit).
● Carefully read the battery manufacturer's instructions before installing / connecting
to, or removing batteries from, the MPPT.
● Be very careful not to short circuit the cables connected to the battery.
● Have someone nearby to assist in case of an accident.
● Explosive battery gases can be present during charging. Be certain there is
enough ventilation to release the gases.
● Never smoke in the battery area.
● If battery acid comes into contact with the skin, wash with soap and water. If the
acid contacts the eye, flood with fresh water and get medical attention.
● Be sure the battery electrolyte level is correct before starting charging. Do not
attempt to charge a frozen battery.
● Recycle the battery when it is replaced.

4
2.0 GENERAL INFORMATION
2.1 Features 0
The features of the MPPT are shown in below. An explanation of each feature is
provided.
1 –Status indicator
2 –RJ45 serial communication ports
3 –Temperature sensor terminals
4 –Dedicated for grounding wire
5 –Input terminals (Red: PV+. Blue: PV-)
6 –Output terminals (Red: BAT+. Blue: BAT-)
7 –Mounting holes for fixed fittings
2.2 Attached Accessories 0
1 –Mounting accessories
2 –Temperature sensing cable
3 –Waterproof communication joint
4 –Plastic expansion particles
5 –M4 screws
6 –User manual

5
2.3 Optional Accessories 0
The following accessories are available for purchase separately from your
authorized dealer:
MH-M80(Meter)
The digital Remote Meter displays system operating information, error indications.
Information is displayed on an OLED display. Additionally, 3 status LEDs provide
system status at a glance. The Meter can easily set the parameters of the controller.
The meter can be flush mounted in a wall or surface mounted using the mounting
frame (included). The MH-M80 is supplied with 3.3 ft (1.0 m) of cable (Can be
extended), a mounting frame, and mounting screws. The MH-M80 connects to the
RJ-45 port on the MPPT. The MH-M80 cannot be used with other’s outside device.
MH-S80(Meter)
The digital Remote Meter displays system operating information, error indications.
Information is displayed on an OLED display. The Meter can easily set the
parameters of the controller. The Meter can be connected to 4 controllers at most,
and the controllers of the same battery system can work in parallel. The meter can
be flush mounted in a wall or surface mounted using the mounting frame (included).
The MH-S80 is supplied with 3.3 ft (1.0 m) of cable (Can be extended), a mounting
frame, and mounting screws. The MH-S80 connects to the RJ-45 port on the MPPT.
The MH-S80 cannot be used with other’s outside device.
USB-RS485 Cable
The USB-RS485 cable converts the RJ45 electrical interface to a standard USB
interface which enables communication between the MPPT and a personal
computer (PC). The cable can be used for programming custom charging set points,
and for logging data in SolarMate. The cable cannot be used with other’s outside
device.
Cloud-Box-M2
A modular wiring box that can be added to MPPT controller. The box acts as a
transmitter (Cloud remote control), users can use the mobile APP to control the
MPPT through internet. The wire box cannot be used with other’s outside device.

6
3.0 INSTALLATION INSTRUCTIONS
3.1 General Installation Notes 0
● Read through the entire installation section first before beginning installation.
● Be very careful when working with batteries. Wear eye protection. Have fresh
water available to wash and clean any contact with battery acid.
● Use insulated tools and avoid placing metal objects near the batteries.
WARNING: Never install the MPPT in an enclosure with vented/flooded
batteries. Battery fumes are flammable and will corrode and destroy the MPPT
circuits.
CAUTION: When installing the MPPT in an enclosure, ensure sufficient
ventilation. Installation in a sealed enclosure will lead to over-heating ，
reduced power operation and a decreased product lifetime.
● Loose power connections and /or corroded wires may result in resistive
connections that melt wire insulation, burn surrounding materials, or even cause fire.
Ensure tight connections and use cable clamps to secure cables and prevent them
from swaying in mobile applications.
● Preset charging profiles are generally designed for common batteries. Custom
settings can be used for varied charging requirements (see sections 4.2 for details).
● The MPPT battery connection may be wired to one battery, or a bank of batteries.
● The MPPT prevents reverse current leakage at night, so a blocking diode is not
required in the system.
● The MPPT is designed to regulate ONLY solar (photovoltaic) power. Connection to
any other type of power source e. g. wind turbine or generator may void the warranty.
WARNING: Solar and battery fuses or DC breakers are required in the system.
These protection devices are external to the MPPT controller.
WARNING: Installation must comply with Electrical Code requirements.
Breakers and fuses may be selected with proper specifications based on application
requirements..

7
3.2 Mounting 0
Inspect the controller for shipping damage. Do
not install directly over an easily combustible
surface since the heat sink may get hot under
certain operating conditions.
For proper air flow, allow at least 15 cm (6 in) of
space above and below the controller, and 10 cm
(4 in) at the sides. Do not locate in an enclosure
where battery gases can accumulate.
NOTE: The heat sink must be in a vertical
position (fins up and down).
STEP 1: Check the controller parameter limits
Verify that the highest temperature compensated
solar array open-circuit voltage (VOC) do not exceed the ratings of the MPPT version
being installed. Multiple controllers can be installed in parallel on the same battery
bank to achieve greater total charging current. In this type of system, each MPPT
must have its own solar array.
STEP 2: Fasten the installation accessories
Align the installation accessories with the mounting holes on the controller.
Fasten the installation accessories to the controller with M4 (4-M4 stainless steel
screws are included)
STEP 3: Drill mounting holes in the wall
Measure and mark the distance on the wall, drill two 6mm diameter holes, and fill
the two holes with plastic expansion pellets.

8
STEP 4: Mount the controller on the wall
Align the fixing holes of the controller with the mounting holes made in Step 3.
Secure the controller to the mounting wall using M4 or M5 tapping screws and
tighten the screws.
STEP 5: Connect input and output wires
Before wiring, it is necessary to open the cover plate on the back of the controller,
then wiring according to the wire sequence and tighten the screws, and then install
the cover plate again after confirmation.
Warning: Avoid connecting the photovoltaic input to the output power line of
the controller by mistake during wiring, otherwise the internal circuit of the
controller may be damaged and the warranty will be invalid.

9
STEP 6: Power on and start working
Check that the solar panel and battery are in normal state. Check that the input and
output cables are connected correctly. Then power on the battery and then the solar
panel in sequence.
NOTE: Before connecting the battery, measure the open-circuit voltage. It
must be over 10 volts to start the controller. If the system voltage is set to
automatic detection, for example, battery voltages ranging from 18V to 30V are
detected as 24V nominal batteries, and the device charges the 24V batteries.
12/24/48v Automatic recognition is performed only when the device is powered on
and started.
Warning: Risk of damage
Disconnect the battery from the MPPT after the solar input is disconnected as
far as possible. If the battery is removed during MPPT charging, there is a certain
probability that the controller will be damaged.
4.0 OPERATION
4.1 Max Power Point Tracking Technology 0
Power is the product of voltage and current (Volts x Amps), the following is true*:
(1) Power Into the MPPT = Power Out of the MPPT
(2) Volts In x Amps In = Volts Out x Amps Out
* assuming 100% efficiency i.e. if no losses in wiring and conversion existed.
If the solar module’s Vmp is greater than the battery voltage, it follows that the
battery current must be proportionally greater than the solar input current so that
input and output power are balanced. The greater the difference between the
maximum power voltage and battery voltage, the greater the current boost.
Higher solar input voltage results in lower solar input current for a given input power.
High voltage solar input strings allow for smaller gauge solar wiring. This is
especially helpful for systems with long wiring runs between the solar array and the
MPPT.
An Advantage Over Traditional Controllers Traditional controllers connect the solar

10
module directly to the battery when recharging. This requires that the solar module
operate in a voltage range that is below the module’s Vmp. In a 12V system, for
example, the battery voltage may range from 10 - 15 Vdc but the module’s Vmp is
typically around 17V. The figure below shows a typical current vs. voltage output
curve for a nominal 12V charging system.
4.2 Battery Charging 0
Charging lead-acid batteries
The MPPT has a 4-stage battery charging algorithm for rapid, efficient, and safe
battery charging.
1 - CC Stage (Constant Current Charging): Fast Charging
2 - CV Stage (Constant Voltage Charging): Absorption Charging
3 - CF Stage (Floating Charging): Protect the battery from long-term overcharge.
And make up the loss of self-discharge
4 - Equalization Stage: Activate battery chemical reaction
Charging Lithium ion batteries
The MPPT will charge according to the specifications of lithium-ion battery, which is
mainly divided into two stages. First stage, when the battery voltage is less than the
saturation voltage, it will charge quickly, and the second stage, when the battery
voltage is equal to the saturation voltage, it will absorb charge.

11
Battery Charge Setting 0
Charging parameters of lead-acid battery. All voltage settings listed are for nominal
12 Volt batteries. Multiply the voltage settings by two (2) for 24 Volt batteries.
Multiply the voltage settings by four(4) for 48 Volt batteries.
Battery Charging Set-points (@ 25°C): [multiply voltages by (2) for 24 volt systems] [multiply voltages by (4)
for 48 volt systems]
Bat
Type
CV
(volts)
CF
(volts)
Equalize
(volts)
Equalize
(minutes)
Undervoltage
Protection
Undervoltage
Recovery
Gel
(GEL)
14.2
13.8
-
-
11.1
12.6
Sealed
(SEL)
14.4
13.8
14.6
30 Custom
11.1
12.6
Flooded
(FLD)
14.6
13.8
14.8
30 Custom
11.1
12.6
Custom
Custom
Custom
Custom
30 Custom
Custom
Custom
Recommended charging parameter setting reference value for lithium-ion batteries.
Bat Type
Nominal
Voltage
Saturation
Voltage
Cut-off
Voltage
Cut-off
Recovery
12V-LiFePO4-4s
12.8
14.4
10.8
12.4
24V-LiFePO4-8s
25.6
28.8
21.6
24.8
48V-LiFePO4-15s
48.0
54.0
40.5
46.5
12V-Ternary-3s
11.1
12.6
9.6
10.5
24V-Ternary-6s
22.2
25.2
19.2
21.0
48V-Ternary-13s
48.1
54.6
41.6
45.5
Custom
Custom
Custom
Custom
Custom
NOTE: These settings are general guidelines for use at the operator’s
discretion. The MPPT can be set to satisfy a wide range of charging
parameters. Consult the battery manufacturer for optimal battery charge settings.

12
4.3 Electrical structure and function description 0
This series of products is a step-down solar charging controller with maximum power
point tracking function.
Using high-performance DSP chip as the control core, combined with advanced
MPPT control algorithm, this product has an industry-leading utilization rate of
photovoltaic power generation.
The application of Synchronous Step-Down technology greatly reduces the heat loss
and ensures excellent energy conversion efficiency.
The use of power semiconductor switching devices to achieve reverse polarity
protection, effectively improving the reliability of products.
PV+
PV-
Bat+
Bat-
PREVENT REVERSE
POLARITY
PREVENT REVERSE
POLARITY FUSEDC-DC CONVERTER
4.4 Status Indications 0
Yellow: in standby mode, there is no charging condition.
Bule: When the breathing light and dark changes, it indicates the fast charging state
(CC), When it keeps lighting, it indicates that the battery is fully charged.
Red: There are faults or warnings.

13
4.5 Operation 0
This series of controllers adopts a screen less design, and all operations can be
completed through the built-in Bluetooth module. Users can download and install
apps by searching "SolarMate" in the Appstore or Googleplay, or obtain the
installation package through our official website. After installation, you can use the
app to interact with the controller through Bluetooth when the Bluetooth function of
the mobile phone is enabled.
Note: If need to customize other parameters, you can implement them
through optional accessories.
Scan the QR code below to see more video demonstrations!Youtobe

14
5.0 TROUBLE SHOOTING
WARNING: RISK OF ELECTRICAL SHOCK.
NO POWER OR ACCESSORY TERMINALS ARE ELECTRICALLY
ISOLATED FROM DC INPUT, AND MAY BE ENERGIZED WITH HAZARDOUS
SOLAR VOLTAGE. UNDER CERTAIN FAULT CONDITIONS, BATTERY COULD
BECOME OVERCHARGED. TEST BETWEEN ALL TERMINALS AND GROUND
BEFORE TOUCHING.
WARNING: Shock Hazard
A means of disconnecting all power supply poles must be provided. These
disconnects must be incorporated in the fixed wiring. Open all power source
disconnects before removing controller wiring cover, or accessing wiring.
Problem:
No LED indications, controller does not appear to be powered
Solution:
With a multi-meter, check the voltage at the battery terminals on the MPPT. Battery
voltage must be 10 vdc or greater. If the voltage on the battery terminals of the
controller is between 10 and 60 vdc, and no LEDs are lit, contact your authorized
dealer for service. If no voltage is measured, check wiring connections, fuses, and
breakers.
Problem:
The MPPT is not charging the battery.
Solution:
Check the fuses, breakers, and wiring connections in the power source wiring. With
a multi-meter, check the array voltage directly at the MPPT solar input terminals.
Input voltage must be greater than battery voltage before charging will begin.
Check whether the battery voltage in App is in the range of controller system
recognition.
Problem:
The battery is in a low energy or empty for a long time.
Solution:
Possible reasons: 1. The number of solar panels are too small to generate enough
energy to meet the use of the system, and the solar panel array can be increased
appropriately.
2. The battery capacity is too small to store enough energy for the system. The

15
battery string capacity can be increased.
6.0 TECHNICAL SPECIFICATIONS
Common Negative MPPT Controller
Model:
ET4850
ET4860
Electrical:
Nominal Battery Voltage
12 / 24 /36 / 48 Vdc
Battery Voltage Range
9 ~ 60Vdc
Voltage Accuracy
< +/- 0.2V
Max.Battery Current
50A
60A
Max.PV Open-Circuit Voltage
150V
Self-Consumption
1.2~1.8W
Conversion Efficiency (Peak)
98%
Mechanical:
Dimensions (Net)
290x220x90
Dimensions (Pack)
410x328x193
Weight (Net)
Weight (Pack)
Data & Communications
Communication Port
RJ45 / RS485
Comm.Protocols
Private protocol and MODBUS
PC Software
SolarMate
Meter
MH-M80 / MH-S80
Electrical Interface
5V current supply / rated power 1W
Dry Contact Access Voltage
Via RJ45 port
Environmental acclimation:
Operating ambient temperature
-30℃~ +50℃
Storage Temperature
-30℃~ +80℃
Humidity
100% n.c.
IP (Ingress protection)
IP65

16
Protections 0
Anti-reverse connection protection - Reverse connection of positive and negative
polarity between the battery end and the photovoltaic array end
Solar Short-Circuit
Internal overtemperature - Reduced power operation
Heatsink Temperature Limit
Over-volt / low-volt protection
Battery shedding
Wire Sizing Charts 0
2% Voltage Drop Charts for 75°C Stranded Copper Wire
1-Way Wire Distance (feet), 12 Volt System
Wire Size
(AWG)
60A
55A
50A
45A
40A
35A
30A
25A
20A
2/0*
22.4
24.4
26.9
29.9
33.6
38.4
44.8
53.8
67.2
1/0*
17.7
19.3
21.3
23.6
26.6
30.4
35.5
42.6
53.2
2
11.2
12.2
13.4
14.9
16.8
19.2
22.4
26.9
33.6
4
7.1
7.7
8.5
9.4
10.6
12.1
14.1
17.0
21.2
6
4.4
4.8
5.3
5.9
6.6
7.5
8.8
10.6
13.2
8
2.8
3.1
3.4
3.7
4.2
4.8
5.6
6.7
8.4
10
1.7
1.9
2.1
2.3
2.6
3.0
3.5
4.2
5.2
1-Way Wire Distance (meters), 12 Volt System
Wire Size
(mm2)
60A
55A
50A
45A
40A
35A
30A
25A
20A
70*
6.8
7.4
8.2
9.1
10.2
11.7
13.7
16.4
20.5
50*
5.4
5.9
6.5
7.2
8.1
9.3
10.8
13.0
16.2
35*
3.4
3.7
4.1
4.5
5.1
5.8
6.8
8.2
10.2
25
2.1
2.3
2.6
2.9
3.2
3.7
4.3
5.2
6.4
16
1.3
1.5
1.6
1.8
2.0
2.3
2.7
3.2
4.0
10
0.8
0.9
1.0
1.1
1.3
1.5
1.7
2.0
2.5
6
0.5
0.6
0.6
0.8
0.8
0.9
1.1
1.3
1.6
Maximum 1-way wire distance for 12 Volt systems, stranded copper, 2% voltage drop

17
2% Voltage Drop Charts for 75°C Solid Copper Wire
1-Way Wire Distance (feet), 12 Volt System
Wire Size
(AWG)
60A
55A
50A
45A
40A
35A
30A
25A
20A
2/0*
27.8
30.3
33.4
37.1
41.7
47.7
55.6
66.7
83.4
1/0*
22.1
24.1
26.5
29.4
33.1
37.8
44.1
53.0
66.2
2
13.9
15.1
16.6
18.5
20.8
23.8
27.7
33.3
41.6
4
8.7
9.5
10.5
11.6
13.1
15.0
17.5
21.0
26.2
6
5.5
6.0
6.6
7.3
8.2
9.4
10.9
13.1
16.4
8
3.5
3.8
4.2
4.6
5.2
5.9
6.9
8.3
10.4
10
2.2
2.4
2.6
2.9
3.3
3.8
4.4
5.3
6.6
1-Way Wire Distance (meters), 12 Volt System
Wire Size
(mm2)
60A
55A
50A
45A
40A
35A
30A
25A
20A
70*
8.5
9.2
10.2
11.3
12.7
14.5
16.9
20.3
25.4
50*
6.7
7.3
8.1
9.0
10.1
11.5
13.4
16.1
20.2
35*
4.2
4.6
5.1
5.6
6.3
7.2
8.5
10.1
12.7
25
2.7
2.9
3.2
3.5
4.0
4.6
5.3
6.4
8.0
16
1.7
1.8
2.0
2.2
2.5
2.9
3.3
4.0
5.0
10
1.1
1.1
1.3
1.4
1.6
1.8
2.1
2.5
3.2
6
0.7
0.7
0.8
0.9
1.0
1.1
1.3
1.6
2.0
Maximum 1-way wire distance for 12 Volt systems, solid copper, 2% voltage drop
Note: *Wires sizes larger than 4 AWG (25 mm2) must be terminated at a splicer block located
outside of the MPPT. Use 4 AWG (25 mm2) or smaller wire to connect to the MPPT to the splicer
block.
•The specified wire length is for a pair of conductors from the solar or battery source to the
controller (1-way distance)
•For 24 volt systems, multiply the 1-way length in the table by 2.
•For 48 volt systems, multiply the 1-way length in the table by 4.