LAT Ser ies
So lar Char ge Cont roller
5A /10A /15A /20A
User Manual
Solar Charge Controller LAT05/10/15/20 User Manual
Sol ar Charge Con trol ler
1.Description of Function
LAT series intelligent solar controller is especially for solar photovoltaic power generation system.
It comes with a number of outstanding features, such as:
● 12V/24V automatic recognition
● Clear readable display of charge/discharge and error description
● Four stages charge way: fast, boost, equal, float
● Temperature compensation
● Low voltage disconnected reulated by state of charge
● Max. 16mm² binding clamp
● Full automatic electronic protect function
This manual provides some important recommendations related to the controller, including installation, use, programming and fault exclusion.
3.Starting up the controller
f s o t e c t e u i d b e t r a s e s t o a e 12 V or
24V system v ol tage. A s s t g m o a th o t e c p s s y v t g t e h 2 t
30 r
1 6 n t
i n i s o
2 V y r l
.
t u i i t r , t r .
e on rol i r e t
L u
s i
4.Display Functions
The controller is equipped with 5 LEDS.
2.Safety instructions and waiver of liability
2.1 Safety
①The solar charge controller may only be used in PV systems in accordance with this user manual and the specifications of other modules manufacturers. No energy source other than a solar generator may be connected to the solar charge controller.
②Batteries store a large amount of energy, never short circuit a battery under all circumstances. We strongly recommend connecting a fuse directly to the battery to protect any short circuit at the battery wiring.
③Batteries can produce flammable gases. Avoid making sparks, using fire or any naked flame. Make sure that the battery room is ventilated.
④Avoid touching or short circuiting wires or terminals.
Be aware that the voltages on special terminals or wires can be as much as twice the battery voltage. Use isolated tools, stand on dry ground, and keep your hands dry.
⑤Keep children away from batteries and the charge controller.
2.2 Liability Exclusion
The manufacturer shall not be liable for damages, especially on the battery, caused by use other than as intended or as mentioned in this manual or if the recommendations of the battery manufacturer are neglected. The manufacturer shall not be liable if there has been service or repair carried out by any unauthorized person, unusual use, wrong installation, or bad system design.
Charge/Discharge display
Battery Capacity display
Load status display
In normal operation,the controller shows charge or discharge status、battery capacity and load status.
4.1Charge display(Green LED):
Solar array supplies electricity
(LED is on)
Solar array does not supply electricity
(LED is off)
4.2Status of charge display(Yellow LED):
<25% 25-75% >75%
The percentage corresponds to the available energy until low voltage disconnect in relation to a fully charged battery.
4.3Load status display(Red LED):
In case of deep discharge or overload/short-circuit of load, the load output is switched off.
Normal operation
(LED is off )
Low voltage disconnect(LED is on)
Overload or short-circuit
of load(LED is flashing)
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Solar Charge Controller LAT05/10/15/20 User Manual
5.Safety Features and Error description
5.1 Safety features
Solar terminal Battery terminal Load terminal
Reverse polarity
Protected *1
Short circuit Protected
Protected *1
Protected *3
Protected *2
Switches off immediately
Switches off with delay Over current
Reverse
Current
Protected
Over voltage Max.55V *4
Under voltage
Over temp.
Max. 40V
Switches off switches off the load if the temperature reaches the set value.
*1 Controller can not protect itself in a 24V system when polarity of battery or solar is reversed.
*2 Controller can protect itself, but loads might be damaged.
*3 Battery must be protected by fuse, or battery will be permanently damaged.
*4 The solar panel voltage should not exceed this limit for a long time as voltage protection is done by a varistor.
Warning: The combination of different error conditions may cause damage to the controller.
Always remove the error before you continue connecting the controller.
5.2 Error description
Error
Loads are not supplied
Display
Red LED is on
Reason
Battery is low
Remedy
Load will reconnect as soon as battery is recharged
Red LED is flashing
Over current/ short circuit of loads
Switch off all loads.
Remove short circuit.
Change battery
Battery is empty after a short time
Red LED is on
Battery has low capacity
Battery is not being charged during the day over voltage protection
Does not recognize the system
voltage
Green LED is off
Solar array faulty or wrong polarity
Red and
Yellow LED
(the right side) are lighted
All LED
Lighted
Remove faulty
connection/ reverse polarity
Battery voltage too high
(>15.5V/31V)
Check if other sources overcharge the battery.
If not, controller
is damaged.
Battery wires or battery fuse damaged, battery has high resistance
Check battery wires,fuse and battery.
The battery voltage is not within the normal operating rang at start-up
Charge or discharge the battery to make the voltage within the normal range
6.Low Voltage Disconnect Function
The controller uses state of charge to protect the battery form being deeply discharged:
11.2V/22.4V~11.8V/23.6V.
Disconnect at 11.2V/22.4V(at nominal load current) up to 11.8V/23.6V(at no load current).
1.If the controller goes into low voltage protection, it will restore only when the battery being recharged and the voltage reaching the reconnect voltage.
2.Around oblique line value separately on behalf of
12V and 24V system's value.
7.Mounting and Connecting
The controller is intended for indoor use only.
Protect it from direct sunlight and place it in a dry environment. Never install it in humid rooms(like bathrooms). The controller measures the ambient temperature to determine the charging voltage.
Controller and battery must be installed in the same room. The controller warms up during operation, and should therefore be installed on a non flammable surface only.
Remark: Connect the controller by following the steps described below to avoid installation faults.
① Mount the controller to the wall with screws that fit to the wall material.
Use screws with max.4mm shaft and max.7.5mm head diameter, no counter sunk.
Mind that the screws have to carry also the force applied by the wiring.
② Connect the wires leading to the battery with correct polarity. To avoid any voltage on the wires, first connect the controller, then the battery.
We strongly recommend connecting a fuse directly to the battery to protect any short circuit at the battery wiring.
The fuse must take the charge controller nominal current:
LAT05: 20A;
LAT10/15: 30A;
LAT20: 40A.
Mind the recommended wire length:
Min 30cm to max 100cm.
The wire size:
LAT05: min2.5m
m 2
LAT10: min6m m 2
LAT15/20: min10m m 2
Warning: If the battery is connected with reverse polarity, the load terminals will also have the wrong polarity. Never connect loads during this condition.
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Solar Charge Controller LAT05/10/15/20 User Manual
③
Connect the wires leading to the solar array with correct polarity, to avoid any voltage on the wires, first connect the controller then the Solar array.
Mind the recommended wire size:
LAT05: min 2.5 m m 2
LAT10: min 6 m m 2
LAT15/20: min 10 m m 2
Remark: Place positive and negative wire close to each other to minimize electromagnetic effects.
Solar panels provide voltage as soon as exposed to sun light .Mind the solar panel manufacturer ’s recommendations in any case.
④ Connect the wires leading to the loads with correct polarity.
To avoid any voltage on the wires, first connect the wire to the load, then to the controller.
Mind the recommended wire size:
LAT05: min 2.5 m m 2
LAT10: min 6 m m 2
LAT15/20: min 10 m m 2
8.Grounding the Solar System
Be aware that the positive terminals of the controller are connected internally and therefore have the same electrical potential. If any grounding is required always do this on the positive wires.
Remark: If the device is used in a vehicle which has the battery negative on the chassis, loads connected to the controller must not have an electric connection to the car body, otherwise the Low Voltage disconnect and electronic fuse functions of the controller are short circuited.
9.Technical Data
Model
System voltage
Max. solar current or load current
Fast voltage
Boost voltage
Equalization voltage
Float voltage
Load disconnect voltage
Load reconnect voltage
Battery type
Temperature Compensation
Max. solar voltage
Max. battery voltage
Over voltage protection
Dimensions/ Weight
Wire size
Own consumption
Ambient temperature
Degree of protection
LAT05 LAT10 LAT15 LAT20
12V/24V automatic recognition
5A 10A 15A 20A
14.0V/28.0V(25℃)
14.5V/29.0V (25℃)
14.8V/29.6 V (25℃)(Liquid)
13.7V/27.4 V (25℃)
11.2~11.8V/22.4~23.6V
12.5V/25.0V
-4.17 mV/K per cell(Boost, Equalization); -3.33 mV/K per cell(Float)
55V
40V
15.5V/31.0V
81*102*37 / 150g
16mm²(AWG#6)
4mA
-40 ~ +60 ℃
IP22
Subject to change without notice. Version: DC14
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