SDN-P Series Waterproof Solar Charge Controller
Instruction Manual
Applicable Model: SDN-P-10A SDN-P-20A
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Preface
Respected users:
Thank you for using our products, we will wholeheartedly provide you with the
best quality service. This product specification provides some important information
and instructions related to installation, use, troubleshooting, etc. Before using this
product, please read carefully, and special attention shall be paid to the safety
suggestions in the instruction manual.
This instruction manual shall be subject to updates without prior notice, which
shall be included in the new version of the instruction manual. Please take good care of
this instruction for your reference.
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Contents
==================================
1. An introduction to the product ................................................................................. 4
1.1 Product description ........................................................................................... 4
1.2 Main features..................................................................................................... 4
1.3 Technical parameters ........................................................................................ 5
1.4 Sizing specificationsInstallation method ........................................................... 6
2. Installation method ................................................................................................... 7
2.1 An introduction to the panel .............................................................................. 7
2.2 LED indicator lamp .............................................................................................. 8
2.3 Installation of the controller ............................................................................... 9
2.4 Mode of connection ........................................................................................... 9
2.5 Wiring procedures ............................................................................................ 10
3. Operational instructions .......................................................................................... 11
3.1 Instructions for charging ................................................................................. 11
3.2 Instructions for discharging ............................................................................ 13
4. Handling of common faults ...................................................................................14
5. Protction functions .................................................................................................. 15
6. Quality guarantee ................................................................................................... 16
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1.1 Product description
SDN-P series waterproof controller products include SDN-P10A, SDN-P20A
two specifications, which are intended mainly for use in small solar independent power
generation systems.
With this equipment, it is possible for the solar cell panel to perform the charge
management on the battery as well as for the battery to carry out load discharge on the
battery. This equipment has perfect protection functions. There are various control
modes and manual switching on/off is available. It can be widely used in solar power
small power station system. In addition, it also can be used in the solar energy street
lamp system together with the LED constant current source.
1.2 Main features
For the full range -35~55°C, it can perform long-term full load operation, with an
high efficiency and a low power consumption
It is compatible with the lead-acid type battery, the colloid type battery, the lithium
type battery and other types of battery
It has six period load control and the length of each period is adjustable separately.
It is of a compact design, with a small size and high performance - price ratio; it can
be installed in a narrow space and is of a fully waterproof design IP67
It has comprehensive protection functions; the controller itself and the external
equipment will not be damaged in case of various abnormal conditions such as short
circuit, open circuit, super power and so on
The pure aluminum shell design facilitates the heat dissipation
It has the expandable Intelligent Human Induction Function
An introduction to the product
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1.3 Technical parameters
· · Product name · Waterproof solar charge controller
· Model · SDN-P10A · SDN-P20A
·
·
· Charging
· Charging mode · PWM pulse width modulation
· Type of batteries · Lead acid / colloid / lithium electricity / to be defined by customer
·
Maximum charge current
· 10A · 20A
· System voltage · 12V/24V (Automatic Identification)
· Battery overvoltage · Default value 17.0V*
·
· Dischargi
ng
· Operating mode · Optical control / automatic / manual / commissioning
· System voltage · 12/24v Automatic identification
·
Maximum output current
· 10A · 20A
· · Battery undervoltage · Default value: 12.0V*
· · Battery overvoltage · Default value: 11.1V*
· · Returned over discharge
voltage
· Default value: 12.6V*
· · Operating temperature
range
· -40~55 ℃
· Self damage · ≤14mA
·
· Dimensio
ns
· Shell size · 88×62×20.7mm
· Waterproofing grade · IP67
· Net weight · 300g
· Note: * For setting of 12V system and 24V system x2, the system voltage can be set in the same as 12V
system.
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1.4 Sizing specification
Figure 1.4: The appearance and dimensions of the product
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Figure 2.1 A diagram of the panel
① Battery Indicator (Green） ② Battery Indicator (Red and
Green dual color）
③ Load indicator (yellow） ④ Infrared communication
connector
⑤ Photocell terminal ⑥ Battery terminal
⑦ Load terminal ⑧ Mounting hole
Installation instructions
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2.2 Status indicator lamp（LED）
Color Status Instructions notes
Photocell
panels
status
LED
Green
Normally On
Panels are in normal charging
Green
Quick
flashing
Overvoltage of battery (see
Troubleshooting)
------ Not On Panel voltage is low
Battery
status LED
Green
Normally On
Battery in normal condition
Green Flashing Battery is full
Red /
Green
Normally On
Undervoltage of battery
Red Normally
On
Battery is over discharging
(The load output has been shut
down)
Load
status
LED
Yellow
Normally
On
Load On
------ Not On Load Off
Yellow Quick
flashing
Load is short circuited
Yellow
Slow
flashing
Overload
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2.3 Installation
Fix the controller in a position where direct sunlight and high temperature can be avoid and
there is no risk of being socked. Attention should be given to the radiators which play the role of
reducing the temperature of the equipment during the full power operation of the equipment..
Obstruction should be avoided so as to ensure the heat dissipation by means of natural
convection. When the device is installed in a narrow plaice such as the lamp pole and so on, it is
preferred to install the heat dissipation bars in the direction of the air flow.
2.4 Mode of connection
The following recommendation is a common wiring method for electricians.
Please connect each wire of the controller according to the standard method.
● Before being dispatched from the factory, each wire of the controller is a cut to
reserved an opening on it. This will help to make easier to push aside the wire at the
time making the connections and avoid short circuit between the wires at the same time.
Therefore, during the installation, please carry out the following steps one by one. In
avoid short circuit, do not remove the insulation of all the six wires at one time.
● Overlap the copper wire in the lead of the controller and that in the lead of the
load each other, then twine each them to the back half of the other lead and tighten hard,
respectively. In this connection mode, there is a larger contact area and a stronger
connection force, which can ensure reliable connection for a long period of time. Make
ensure that each of the connection heads is tightened. It is preferred to fasten the wire with
a strap so as to avoid a loose connection head caused by shaking of the wire in the case
that the controller is used while it is in movement.
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● Wrap the bare part of the wire with the waterproof insulating tape. To ensure its
reliability, first wrap the inner layer with a length of high-pressure rubber self-adhesive
tape and then wrap the outer layer with a length of electrical tape. It should avoid to let
the controller to be in a humid and hot environment for an extended period of time, where
aging of the electrical tape may occur and consequently result in a short circuit accident.
Figure 2.4.3 Wiring step 3- Wrapping of the insulation layer
The wiring operation which conform to the requirements is the guarantee for the long-
term reliable operation of the system. If the connections of the wire are not reliable enough,
this may cause the contact resistance to be too large and cause the connection area to be too
hot. The operation for an extended period of time may result in early aging of the
insulation layer of the lead, and then give rise to short circuit, open circuit and other faults.
2.5 Wiring procedures
For the purpose of installation safety, please follow the sequence of
wiring of ① l oad ② battery ③ photocell while carrying out the installation.
● Connecting of the load: The controller has not started to work at this time, and the
controller does not make responses after the connection is completed
● Connecting of the battery: Before connecting the battery, make sure that the
battery voltage is higher than 9V in order to start the controller. If it is a system of 24V,
make sure that the accumulator voltage is not less than 18V. When the connection of
battery is completed, the controller will start working,
● Connecting of the solar battery: The controller is applicable to the solar
modules of standard specifications 12V or 24V; it can also be used with a solar cell
module with an open circuit voltage not exceeding the specified maximum input
voltage. At the maximum power point, the voltage of the solar cell module should not
be less than the battery voltage.
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3. 1 Instructions for charging
SDN-P series products can manage battery charging according to specific charging
curves of the different battery types and their setting items. Based on the charging
characteristics, the batteries can be divided into two categories: the lead acid colloidal
battery and the lithium battery, and it will be possible to customize the parameters.
3.1.1 Colloid battery / lead acid battery
●
The preliminary trickle charging stage: At the beginning of charging, if the
voltage of the battery is too low, the controller will charge at a very small current for the
purpose of protecting the battery and preventing the impact of excessive current from
causing damages to the internal structure of the battery. When the battery voltage has
increased to certain level, it will enter the quick charging stage.
● The quick charging stage: When the battery voltage has not reached the set value,
the controller will provide the maximum battery panel power for charging of the battery.
In the quick charging stage, the photovoltaic cell and the battery are directly connected,
and the photovoltaic cell voltage is restrained at the battery voltage point.
● The balanced charging stage: When the solar battery enters the balanced charging
stage, the pulse width modulation (PWM) will be activated, and as the battery voltage
has reached the preset value, the controller will keep adjusting the battery voltage in
order to keep it at the set value so that overcharging the battery can be avoided. This
stage will be maintained for 2 hours and then the solar battery enters the floating
charging stage.
● The floating charging stage: The battery no longer needs more electricity at this
time. However the controller will still maintain a very weak charge, for the purpose of
reducing the electricity consumption in supplying power to small loads and replenishing
the power consumption of the battery itself. In this way, it will be possible to keep the
battery in the saturation state all the time, while prolong the service life of the battery.
Operational instructions
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3.1.2 Lithium battery
In case that the lithium battery type is chosen, the controller should be adjusted to a charging
curve which is suitable for the characteristics of the lithium battery.
●
The preliminary trickle current charging stage: At the beginning of charging, if
the voltage of the battery is too low, the controller will charge at a very small current for
the purpose of protecting the battery and preventing the impact of excessive current from
causing damages to the internal structure of the battery. When the battery voltage has
increased to certain level, it will enter the quick charging stage.
● The quick charging stage: When the battery voltage has not reached the set value,
the controller will provide the maximum battery panel power for charging of the battery. In
the quick charging stage, the photovoltaic cell and the battery are directly connected, and
the photovoltaic cell voltage is restrained at the battery voltage point.
● The constant voltage charging stage: When the battery voltage has increased to
the set voltage for charging, the constant current charging will come to an end and the
constant voltage charging stage will start. The current slowly decreases for its maximum
value as the charging process continue to perform the charging according to the extent of
saturation of the solar battery. Normally the set voltage for charging is 4.2V for a single
- junction solar cell depending on the parameters provided by the battery manufacturer.
● The charging termination stage: Monitoring of the charging current
in the constant voltage charging stage is carried out.
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Failure phenomenon Analysis of causes Solution
·
The photovoltaic indicator lamp is
not on during the day
· The load indicator lamp is on
during the day
·
The load indicator lamp is on only
for one night
·
· There are errors
with the battery panel or
with the wiring
·
Check to see whether the wiring of the
solar panel has been correct in a proper
manner
·
Disconnect the connection of the solar
panel and make the connection once again
· The load indicator lamp flashes
· The LED lamp is not on
· The load
connection is short
circuited
· The lamp holder is
damaged
·
Check to see if the load connection has
been made in a correct way
·
Disconnect the load and make the connection
once again
The load indicator lamp flashes
slowly
The output power
exceeds the rated power
Remove part of the load and make the
connection once again.
The battery indicator lamp is in
red
The period when LED lamp is on
is not sufficient
There is a lack of voltage
with the battery
The lead has been broken
and the battery has been
damaged
Check to see if the charging is normal and if
the solar panel has been equipped with a
shield and so on
Check to see if the battery connection has
been disconnected or has been connected in a
loose manner
There is any quality problem with the battery
or its service life has been expired.
Handling of common faults
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Load fault protection:
If there is a short circuit with the controller load, the controller will automatically
carry out protection, the load indicator lamp will flashes quickly, and
the controller
will automatically detect at a certain interval to see if the fault at the load end has
been eliminated. If the failure lasts for more than 7 minutes, the controller will no
longer try to turn on the load until the next day when the controller attempts
to turn
on once again or the operator carries out the troubleshooting and manually
eliminates the fault.
Overcurrent protection:
The controller will keep the normal operation under 1.1-fold
overcurrent, carry out protection after a time delay of 1 minute at 1.25-
fold time delay, and carry out protection after a time delay of 20
seconds at 1.5-fold overcurrent.
Overcharge protection:
When the charging voltage is too high, the controller will automatically
cut off the charging circuit. Avoid damaging the battery.
Over discharging protection:
When the battery has been up to the over-discharge protection voltage,
the controller enters the over-discharge protection state and closes the
load output so as to protect the battery from being damaged. When the
battery charge is higher than the returned over-discharge voltage, the
controller will exit the over-discharge protection and restore the load
power supply.
The reversed polarity connection protection for the photovoltaic cell:
The controller will not be damaged in case that the polarity of the
photovoltaic cell has been reverse connected, and it will continue to
carry out the normal operation after the wiring error has been corrected.
The reversed polarity connection protection for the battery:
The controller will not be damaged in case that the polarity of the
battery has been reverse connected, and it will continue to carry out the
normal operation after the wiring error has been corrected.
The temperature sensor damage fault protection:
In case that the temperature sensor is short-circuited or damaged, the
controller will work at 25 ℃ by default to avoid the damage caused to
the battery by the wrong temperature compensation.
Protection functions
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