Product training of LEO solar pumping system.pdf

Product Training on LEO
Solar Pumping System 2022V1

1. Understand the principle and application of solar pumping system
2. Clearly understand the features & functions of LEO Solar Pumping System
3. Master the selection of products, accessories and application precaution
What will we benefit after the training?

01
Principles and
application of
solar pumps
02
Advantages and
functions of LEO
DC Solar Pumping
System
03
Advantages and
functions of LEO
AC Solar Pumping
System
04
Configuration of
LEO Solar
Pumping System
05
Accessories
selection of LEO
Solar Pumping
System
CONTENTS

01
Principles and application of
solar pumps

Application Principles and Features
Principles and application of solar pumps
The Solar Pumping System makes full use of the Photovoltaic
effect of the crystalline silicon photovoltaic panel interface,
converts solar energy into electricity, and drives the pump to
pump water from deep wells, rivers, lakes, reservoirs and other
water sources.
The Solar Pumping System mainly consists of solar modules,
solar inverter (controller) and water pump.
Solar pumps use the long-lasting energy from the sun, work at
sunrise and rest at sunset, without fuel, without power grid, no
battery needed and the water pump is directly driven to pump
water, which greatly saves the costs of construction, operation
and maintenance.
It can be widely used in agricultural irrigation, desert governance,
livestock and animal husbandry, desalination, landscape
fountain, domestic water supply, etc.

Knowledge Extension - What is Photovoltaic Effect
Photovoltaic effect, refers to the phenomenon
that voltage and current are generated between
semiconductors or parts of semiconductors and
metals irradiated by light or other electromagnetic
radiation.
In the photovoltaic effect, due to the non-uniformity
inside the material (for e.g. when a PN junction is
formed inside) under the action of the self-built
electric field, the excited electrons and the holes
that lose electrons move in opposite directions,
forming positive and negative bipolar.
The photovoltaic effect was first discovered by the
French physicist Alexander Edmond Becquerel
in 1839.

02
Advantages and functions of
LEO DC Solar Pumping System

MAIN ADVANTAGES OF SOLAR PUMP
1. High Efficiency
Most efficient permanent magnet
brushless motor make efficiency up
to 97%
The latest MPPT Technology
1）Real-time tracking for the solar
panels, output maximum power and
get largest water supply with least
panels;
2）Ultra-wide voltage:60~410V
3）Compatible with any PV panel
 2. Multiple drivers &
Easy Switching
 Compatible with diversified
power supply systems;
 Can adapt to multiple power
supply modes;
 The perfect solution to solve
trouble that the pump
cannot work due to fewer
power supply options
 3. Environmentally-
friendly
 Advanced water-filled motor
 Effectively solve the problem
of water pollution caused by
the leakage of traditional oil-
filled motors
 Achieve true zero pollution.
 4. Rust less
 Full SS304 Stainless Steel
 Can adapt to complicated
underwater environment
application;
 Avoid corrosion problem
due to pump damage

Classification of LEO Solar products
LEO Solar
products
LEO DC Solar
Pump
LEO DC Brush
Pump
Permanent
magnet
synchronous
pump
LEO AC Solar
Pump
Permanent
magnet
synchronous
pump
LEO AC
asynchronous
water pump
LEO Solar
Inverter
Note: The main difference between
low-voltage DC permanent magnet
synchronous motor and AC permanent
magnet synchronous motor is that the
former input is low-voltage DC, while
the latter input high-voltage AC.
Due to the different input power, the
stator winding and structure of the low-
voltage DC permanent magnet
synchronous motor have been adjusted
to adapt to the low-voltage large AC.

Surface
Pump
DCP DC DC brush motor
AC bracket DC DSDP PMSM Motor
AP
DC DSDP
AC/DC DSKP
PMSM Motor
XKP
Swimming pool pump
DC DSDP
AC/DC DSKP
PMSM Motor

Deep Well Pump
QDX DC DC brush motor
LPS
boost
AC/DC CN300 PMSM Motor
LPY
AC/DC DSKP
P-Plastic
PMSM Motor
LPF AC/DC DSKP PMSM Motor
LDG AC/DC DSKP PMSM Motor
LDP AC/DC DSKP PMSM Motor
LDS AC/DC DSKP PMSM Motor

Advantages of LEO DSKP
DSDP
AC
DC
cable adaptive within 300 meters
Compatible with asynchronous motor and
synchronous permanent magnet motor
GPRS Remote Control
Single and double floating ball switching
Compatible with various power supply modes:
With AC/DC and AC/DC hybrid mode
With AC/DC and AC/DC
hybrid mode
Built in temperature control, all-round protection controller
Compatible with ultra wide voltage ac60-300 DC 90-440
Full power operation at low voltage input
Multifunctions:
Such as the upper limit speed, child lock function, impeller
cleaning mode, no water protection time setting, and over
temperature protection temperature setting, etc.

DSDP
Controller
Voltage
Power of
pump
Rated Voltage
of pump
Recommended Input
Voltage of Controller
Maximum input open
circuit voltage (Voc)
Solar Panel
configuration Series-parallel mode
Alternative
configuration
Alternative series-parallel
mode
12 80W 12 20-36V 50V 60W 2PCS Two pcs in series connection
24 120W 24 30-48V 50V 80W 2PCS Two pcs in series connection
36 210W 36 30-48V 50V 150W2PCS Two pcs in series connection
48 500W 48 60-90V 100V 330W2PCS Two pcs in series connection
72 750W 72 90-120V 150V 330W3PCS Three pcs in series connection
72 1100W 72 90-120V 150V 280W6PCS 3 pcs in series, 2 strings in parallel 500W3PCS Three pcs in series connection
110 1100W 110 110-150V 200V 450W3PCS Three pcs in series connection
110 1300W 110 110-150V 200V 550W3PCS Three pcs in series connection 285W6PCS
Three pcs in series connection
two in parallel
110 1500W 110 110-150V 200V 330W6PCS 3 pcs in series, 2 strings in parallel 650W3PCS Three pcs in series connection
DSKP
Municipal
Electricity
Power of
pump
Rated Voltage
of pump
Recommended Input
Maximum input open
Solar Panel
Alternative
configuration
mode
80-220V 750W 110 120-430V 430V 280W4PCS Four pcs in series connection
80-220V 1100W 150 160-430V 430V 450W4PCS Four pcs in series connection 400W4PCS Four pcs in series connection
80-220V 1300W 150 160-430V 430V 450W4PCS Four pcs in series connection
80-220V 1500W 200 210-430V 430V 450W5PCS Five pcs in series connection 500W4PCS Four pcs in series connection
80-220V 2200W 300 310-430V 430V 450W7PCS Seven pcs in series connection 400W8PCS Eight pcs in series connection
DC pumps
Power of
pump
Rated Voltage
of pump
Recommended Input
Maximum input open
Solar Panel
Alternative
configuration
mode
180W 12 12-24V 180W2PCS Two pcs in series connection
370W 24 24-48V 330W2PCS Two pcs in series connection
550W 48 48-72V 180W4PCS Four pcs in series connection
1100W 110 110-150V 450W3PCS Three pcs in series connection
1300W 150 150-200V 550W3PCS Three pcs in series connection

03
Advantages and functions of
LEO AC Solar Pumping System

 Advanced MPPT: the maximum power tracking efficiency
reaches 99%.
 Wide voltage & power range: support single-phase 220V,
three-phase 220V and three-phase 380V, power 0.7~710kW.
 Simple and easy operation: no need to set parameters, run
automatically after connecting the lines.
 Multiple protections: water level protection, dry-running
protection, over-voltage & over-current & over-load protection
 , phase loss protection, over temperature protection, etc.
 Low-voltage start: optional booster module to achieve low-
voltage start and reduce costs (for customers who already
have low-power water pumps below 2.2KW).
 Automatic switching: optional switching module, realize
automatic switching of municipal electricity, 24 hours of
uninterrupted operation.
 Support remote monitoring and control: optional GPRS
module, realize remote monitoring, start and stop, fault
checking and so on.
 Economical, low cost (compared to IP54 65 solution)
LEO AC Solar Pumping System Advantages

LEO AC Solar Pumping System
Information needed
In order to make the best solution, we need you to provide the following
on-site information:
1) The installation location of the solar pumping system, the longitude
and latitude of the local city of the customer’s country.
2) Daily water consumption (the hourly flow is calculated according to
the local average sunshine time per day).
3) Head (converted from the vertical height of the water storage point
and the water source point plus the height of the horizontal pipe
loss and the bevel distance).
4) Water source situation (water source (well water, river water, pond
water), water quality, etc.).
5) The distance from the pump to the pump station (distance from the
inverter/controller), the distance from the component installation to
the pump station, etc.
6) In view of the existing water pump, when changing to single solar
power supply, it is necessary to know the working time and
frequency of the customer's original water pump, and then make
an alternative plan.

04
Configuration of LEO Solar
Pumping System

Model of Inverters
Power of Inverter
(KW)
Solar panels（Vmp） Connections Pump recommended
MPPT recommended
voltage
1-3Phase：220V，50/60Hz
SPIm-2S-0.7B 0.75KW Polysilicon 275W 31V
4PCS, 2 pcs in series, 2 strings in
parallel (5x boost）
Single phase/three phase
220v0.55KW
DC input:280-350v
SPIm-2S-1.5B 1.5KW
Monocrystalline silicon
340W 34v
220v0.75KW
DC input:280-350v
SPIm-2S-1.5B 1.5KW
340W 34v
Single phase/three phase 220v
1.1KW
DC input:280-350v
SPIm-2S-0.7B 750W Polysilicon 60W 18V 18PCS, 18 pcs in series
220v0.55KW
DC input:280-350v
SPIm-2S-1.5B 1.5KW Polysilicon 80W 18V 18PCS, 18 pcs in series
220v0.75KW
DC input:280-350v
1.1KW
DC input:280-350v
1.5KW
DC input:280-350v
SPIm-2S-4.0B 4.0KW
550W 42V
7PCS, 7 pcs in series
2.2KW
DC input:280-350v
Boost Module Model Max power Max input voltage Working voltage Output voltage
LV40-70 1600W 70V DC 40v-70v DC 240-420V DC
LV60-90 1600W 90V DC 60-90v DC 420-630V DC

Model No. Power of Inverter Solar panels（Vmp） Connections
Pump
recommended
MPPT Recommended
Voltage
Municipal Electricity input 3-Phase：380V，50/60Hz Range：-15%～+30%
SPI-4T-4.0B 4.0KW Polysilicon 275W 31V 16PCS, 16 pcs in series 380V 2.2KW DC:450-600V
SPI-4T-4.0B 4.0KW Polysilicon 275W 31V 18PCS, 18 pcs in series 380V 3.0KW DC:450-600V
SPI-4T-5.5B 5.5KW Monocrystalline silicon 450W 41V 14PCS, 14 pcs in series 380V 4.0KW DC:450-600V
SPI-4T-7.5B 7.5KW Monocrystalline silicon 550W 42V 15PCS, 15 pcs in series 380V 5.5KW DC:450-600V
SPI-4T-011B 11KW Monocrystalline silicon 450W 41V 28PCS, 14 pcs in series, 2 strings in parallel 380V 7.5KW DC:450-600V
SPI-4T-015B 15KW Monocrystalline silicon 550W 42V 30PCS, 15 pcs in series, 2 strings in parallel 380V 11KW DC:450-600V
SPI-4T-018B 18.5KW Monocrystalline silicon 550W 42V 45PCS, 15 pcs in series, 3 strings in parallel 380V 15KW DC:450-600V
SPI-4T-030B 30KW Monocrystalline silicon 550W 42V 75PCS 15 pcs in series, 5 strings in parallel 380V 26KW DC:450-600V
SPI-4T-090B 90KW Monocrystalline silicon 550W 42V 210PCS 14 pcs in series,15 strings in parallel 380V 75KW DC:450-600V

05
Accessories selection of LEO
Solar Pumping System

Selection of solar pumps
1. First, choose a type of pump after analyzing the customer's water source, pump
station and other environmental conditions, such as deep well pump, surface pump,
horizontal multi-stage centrifugal pump, vertical multi-stage centrifugal pump etc.
2. Check the curve diagram in the manual, and choose the pump close to the best
efficiency point according to the calculated head and required flow rate.
3. DO NOT choose a pump close to the maximum head.
Recommended
Flow range
Flow
Efficiency
Power

1. Usually 1.3~1.5 times than the power of the pump, 1.5 times is the common type, and 1.3 times can be
chosen when the competition is fierce.
2. Under the requirement of motor’s working voltage, normally configured 1.414 times than motor voltage.
3. The open circuit voltage shall be less than the voltage marked on the controller.
For example, the DC pump’s power is 750W, and the motor voltage is 72V.
Then P=750W*1.3=975W, Vmp=72V*1.414=101.8V, according to the panel parameters, the most suitable
component is: Monocrystalline silicon 330W, Vmp=37.87V, Voc=45.82V.
The unit solar panel is 330W, and need 3 pieces connected in series, which can not only meets the open
circuit voltage requirements, but also meets the working voltage requirements, and as well as the power
configuration of the solar panel.
Selection of solar modules
Remarks:
a) The open circuit voltage is proportional to the logarithm of the light
intensity, that is, the light intensity changes greatly, and the open circuit
voltage changes very little. Similarly, the MPPT voltage changes very little.
b) The short-circuit current is proportional to the light intensity.
c) The open circuit voltage is inversely proportional to the ambient
temperature, that is, the higher the temperature, the lower the open circuit
voltage。
d) Open circuit voltage is no related to the area of solar panel.

For example, a customer’s motor is 20HP, 380V and he needs to configure solar pumping system. How to select the solar panel?
1. Firstly, we have to make conversion of the power. 1HP=0.735KW, usually takes 0.75KW, so 20HP=15KW,.
2. Secondly, calculate the power required by the solar panel. 15KW*1.5=22.5KW.
It needs to meet the working voltage of 380*1.414=537.32V (takes 540V) then we choose the conventional 545W solar panels.
Open circuit voltage is less than 750V, so directly use the DC working voltage of the inverter (540V) and divide it by the working voltage of
the solar panel (41.8V) to calculate the number of series required for the solar panels, 540/41.8=12.9 takes an integer and 13 solar panels
are connected in series and 3 strings in parallel, that is:
13*545*3=21.255KW, if the customer does not mind less than 1.5 times to the motor power, then this plan can be adopted;
if need to meet 1.5 times the power of the solar panels, than add one panel to each string, that is 14*545*3=22.89KW. It can also meet the
requirement of open circuit and the working voltage.
Selection of solar modules

Factors to be considered:
1. Altitude and temperature of the installation location;
2. The voltage, frequency, and power parameters of the customer's pump (number of motor pole pairs or rotational speed).
3. The distance from the pump to the inverter.
4. Accessories fan (output reactor sine wave filter).
E.g. A set of 15KW 380V, 60HZ water pump needs to be installed in the area of 3700 meters above sea level in India. How to
choose the inverter? We have to consider that :
a) -10℃～60℃ (Ambient temperature is 45℃～60℃, please use derating)
b) Altitude Range: 0~2000 meters
c) The rated output current is reduced by 1% for every 100 meters higher than 1000 meters.
Selection of LEO inverters

1. Calculation of "Maximum DC Input Current":
bus
VFD
M
M
n
AVG
DC V
P /
/
/
I ,
, η
η
=
1
,
,
max
,
I K
I n
AVG
DC
DC ×
=
2
,
,
,
I K
I n
AVG
DC
Switch
DC ×
=
DC circuit breaker selection:
Selects the appropriate circuit breaker nearby
according to IDC,Switch
For the selection of anti-reverse diodes, please
refer to IDC,Switch indicators.
Calculation of Accessories Selection

E.g.：SPI-4T-022B , PV DC circuit breaker, anti-reverse diode selection
A
n
AVG
DC 4
.
47
540
/
95
.
0
/
905
.
0
/
22000
I ,
, =
=
A
DC 1
.
52
1
.
1
4
.
47
I max
, =
×
=
 The DC circuit breaker can be selected as the nearest 63A specification, and the voltage is
selected according to 1000VDC.
 Anti-reverse diode, according to ≥56.9A, optional 100A, 110A and other common specifications.
A
Switch
DC 9
.
56
2
.
1
4
.
47
I , =
×
=
, Rounding
A
DC 60
I max
, =
Calculation of Accessories Selection

Selection of combiner box: According to the number of photovoltaic arrays and the open circuit
voltage, combiner boxes are recommended for more than 4 channels. Conventional combiner box
voltages are 500V 1000V specifications, and the number of channels is 4, 6, 8, 10, 12, 14, and 16
channels.
DC lightning protection device: The output end of the photovoltaic DC combiner box should be
equipped with a lightning protection device, and both the positive and negative poles should have
lightning protection functions. Specifications should meet the following requirements:
a) The maximum continuous working voltage Uc:Uc>1.3Uoc(STC).
b) Maximum discharge current Imax: 1max(8/20)≥40kA, nominal discharge current
In:I(8/20)≥20kA.
c) Voltage protection level Up, Up is the nominal discharge current I. test value below.
d) The lightning arrester should have the function of disconnector and fault indication.
Other accessories’ Selection

DC Fuse: The rated voltage of the fuse should generally not be lower than 1500V/1000V (IEC).
The rated current of the fuse should generally not be less than 1.56Isc and not greater than the
maximum rated current of the fuse allowed by the component manufacturer.
 The reason for choosing 1.56Isc is according to the provisions of Article 690.8(A) of the “USA
National Electrical Code" (NEC, 2011 edition). This regulation assumes that the maximum
current of the module is 125% of Isc. The reason is that under certain cloud coverage
conditions, the cloud is equivalent to a magnifying glass, and the light intensity can be 25%
higher than the irradiance (1000W/m2) corresponding to the STC.
 The second reason is the “USA National Electrical Code" (NEC, 2011 edition) 690.8 (B), which
requires that the fuse must be able to withstand 125% of the maximum current of the
component.
 The end result is that the rated current of the circuit breaker is chosen as 125% of 125% of 1sc,
which is 156% of 1sc.
Other accessories’ Selection

Submersible pump and motor power selection:
1. Pump shaft power: P=Q*H/102/ ŋ ; Q: Flow, L/s ; H: Head, m
2. Motor power: P motor = K*P ; K: Spare factor,
P =2~5kW, K=1.5~1.3 ;
P =5~10kW, K=1.3~1.25
5 7 9 11 13 15 17 19
P

kW/m
2
0
0.2
0.4
0.6
0.8
1.0
1.2
III: full speed running time(11~15)
II: water pumping out time(9~17)
I: sunrise and sunset (7~19)
Analysis and Solution:
1. The water pump is reversed and the water output is small: change the running direction of the motor to test
2. The parameter setting problem causes the motor to run abnormally: check the parameter setting, especially confirm the motor
parameters
3. The law of conservation of capacity, the loss of the inverter is about 4%, and the rest is all output to the motor. No water or very
little water can only indicate that the input power is small, and more photovoltaic panels need to be configured.
1. The submersible pump is located in the well 100 meters above the ground, and there is no water or
very little water during operation.
Q&A

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