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Related Manuals for Sunnytech ML2420
Summary of Contents for Sunnytech ML2420
- Page 1 ML Maximum Power Point Tracking (MPPT) Series ML2420—ML2430—ML2440 Solar Charge and Discharge Controller User Manual Model ML2420 ML2430 ML2440 Battery voltage 12V/ 24V Max. solar panel voltage 100V (25°C), 90V (-25°C) Charging current Discharging current...
- Page 2 Dear users, Thank you for choosing our product! Safety Instructions 1. As this controller deals with voltages that exceed the top limit for human safety, do not operate it before reading this manual carefully and completing safety operation training. 2. The controller has no internal components that need maintenance or service, thus do not attempt to disassemble or repair the controller.
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Page 3: Table Of Contents
Table of Contents 1. Product Introduction ........................ 4 1.1 Product Overview ......................4 1.2 Product Features ......................4 1.3 Exterior and Interfaces ..................... 6 1.4 Introduction to Maximum Power Point Tracking Technology ........7 1.5 Charging Stages Introduction ..................9 2. -
Page 4: Product Introduction
6.1 12V System Conversion Efficiency ................30 6.1 24V System Conversion Efficiency ................30 7. Product Dimensions ....................... 31 1. Product Introduction 1.1 Product Overview This product can keep monitoring the solar panel's generating power and tracking the highest voltage and current values (VI) in real time, enabling the system to charge the battery in maximum power. - Page 5 optimum working point on the I-V curve in an extremely short time. The product boasts an optimum MPPT tracking efficiency of up to 99.9%. ◆ Advanced digital power supply technologies raise the circuit's energy conversion ◆ efficiency to as high as 98%. Charging program options are available for different types of batteries including gel ◆...
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Page 6: Exterior And Interfaces
TVS lighting protection ◆ 1.3 Exterior and Interfaces ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ Definition ○ Transmitting terminal TX ○ Receiving terminal RX ○ Power supply grounding /Signal grounding ○ Power supply grounding /Signal grounding ○... -
Page 7: Introduction To Maximum Power Point Tracking Technology
○ ○ Abnormality indicator Load "-" interface ○ ○ LCD screen External temperature sampling interface ○ ○ Operating keys RS232 communication interface ○ Installation hole ○ Solar panel "+" interface ○ Solar panel "-" interface 1.4 Introduction to Maximum Power Point Tracking Technology Maximum Power Point Tracking (MPPT) is an advanced charging technology that enables the solar panel to output more power by adjusting the electric module's operating status. - Page 8 VP曲线 VP curve VI曲线 VI curve I(A) P(W) 94.5 MPPT点 MPPT point I (A) 81.0 67.5 54.0 40.5 P (W) PWM charging PWM充电 27.0 13.5 19.6 11.2 14.0 16.8 U(V) Fig. 1-2 Solar panel output characteristic curve Meanwhile, due to changing ambient temperature and illumination conditions, the max.
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Page 9: Charging Stages Introduction
I(A) 20℃ 30℃ 40℃ 太 阳 50℃ 温度降低，电流不变， With temperature dropping, current 板 功率增大 60℃ 温 stays stable and power increases 度 70℃ U(V) Open-circuit voltage decreases with rising temperature 温度升高，开路电压减小 Fig. 1-4 Relation between solar panel output characteristics and temperature 1.5 Charging Stages Introduction As one of the charging stages, MPPT can not be used alone, but has to be used together with boost charging, floating charging, equalizing charging, etc. - Page 10 Battery voltage Sustaining Fast Floating Equalizing charging voltage charging charging charging Boost charging voltage Floating charging voltage Charging return voltage Time Duration: 2h Battery voltage (range: 10 to 600min) Max. Cumulative current time: 3h Time Fig. 1-5 Battery charging stages diagram a) Fast charging At the fast charging stage, as the battery voltage has not reached the set value of full voltage (i.e.
- Page 11 duration reaches the set value, the system will then switch to floating charging. Equalizing charging Warning: risk of explosion! In equalizing charging, an open lead-acid battery can produce explosive gas, therefore the battery chamber shall have good ventilation conditions. Note: risk of equipment damage! Equalizing charging may raise the battery voltage to a level that may cause damage to sensitive DC loads.
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Page 12: Product Installation
timing process, and 3 hours after the battery voltage reaches the set value, the system will automatically switch to equalizing charging. 2) If no calibration has been done to the controller clock, the controller will perform equalizing charging regularly according to its internal clock. Floating charging When finishing the sustaining charging stage, the controller will switch to floating charging in which the controller lowers the battery voltage by diminishing the... -
Page 13: Wiring Specifications
The wiring specifications of the battery and loads must be selected according to rated currents, and see the following table for wiring specifications: Model Rated Rated Battery wire Load wire charging discharging diameter diameter current current (mm2) (mm2) ML2420 ML2430 ML2440... -
Page 14: Installation And Wiring
2.3 Installation and Wiring Warning: risk of explosion! Never install the controller and an open battery in the same enclosed space! Nor shall the controller be installed in an enclosed space where battery gas may accumulate. Warning: danger of high voltage! Photovoltaic arrays may produce a very high open-circuit voltage. - Page 15 Step 1: choose the installation site Do not install the controller at a place that is subject to direct sunlight, high temperature or water intrusion, and make sure the ambient environment is well ventilated. Step 2: first place the installation guide plate at a proper position, use a marking pen to mark the mounting points, then drill 4 mounting holes at the 4 marked points, and fit screws in.
- Page 16 ○ Connecting to external temperature sampling interface ○ Connecting communication cable ○ Connecting power cable Warning: risk of electric shock! We strongly recommend that fuses or breakers be connected at the photovoltaic array side, load side and battery side so as to avoid electric shock during wiring operation or faulty operations, and make sure the fuses and breakers are in open state before wiring.
- Page 17 Tips: ML Series controllers can only be started through wiring of the battery terminals, but ML-LI Series controllers can be started by switching on the power supply of the photovoltaic array. The latter case applies to starting the controller and activating the lithium battery when the lithium battery BMS is in protection state and therefore can't output power.
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Page 18: Product Operation And Display
3. Product Operation and Display 3.1 LED Indicators Indicating the controller's current charging ○ ---PV array indicator mode. ○ ---BAT indicator Indicating the battery's current state. ○ Indicating the loads' On/ Off and state. ---LOAD indicator Indicating whether the controller is ○... - Page 19 each lasting for 0.1s) ○ Double flashing (a cycle of 2s with on for 0.1s, off Current-limited for 0.1s, on again for 0.1s, and off charging again for 1.7s) ○ No charging BAT indicator: Indicator state Battery state Normal battery voltage Steady on Battery Slow flashing...
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Page 20: Key Operations
ERROR indicator: Indicator state Battery state System operating normally System malfunctioning Steady on 3.2 Key Operations Page up; increase the parameter value in ▲ setting Page down; decrease the parameter value in ▼ Down setting Return to previous menu (exit without ◄... -
Page 21: Lcd Startup And Main Interface
3.3 LCD Startup and Main Interface Parameter value Charging Battery Discharging Load Nighttime Daytime Solar panel Setting Serial port Bluetooth Abnormality Charging stage System voltage Battery type Unit 3.3.1 Startup interface During startup, the 4 indicators will first flash successively, and after self-inspection, the LCD screen starts and displays the battery's voltage level which will be either a fixed voltage selected by the user or a voltage automatically recognized. -
Page 22: Load Mode Setting Interface
Main monitoring page Charging current Component voltage Battery voltage Battery capacity Abnormality code Charging capacity Load current Device temperature Load mode Discharging capacity 3.4 Load Mode Setting Interface 3.4.1 Load modes introduction This controller has 5 load operating modes which will be described below: Mode Descriptions When no sunlight is present, the solar panel voltage is lower than the light control on... -
Page 23: System Parameter Settings
signals, the load is switched on. This mode enables fast check of the correctness of system installation during installation debugging. The energized load keeps outputting, and this mode is suitable for loads which need Normal on mode 24-hour power supply. 3.4.2 Load mode adjustment Users can adjust the load mode as needed on their own, and the default mode is debugging mode (see "load modes introduction"). -
Page 24: Product Protection Function And System Maintenance
Note: after system voltage setting, power supply has to be switch off and then on again, otherwise the system may work under an abnormal system voltage. The controller enables users to customize the parameters according to the actual conditions, but parameter setting must be done under the guidance of a professional person, or else faulty parameter settings may render the system not able to function normally. - Page 25 from damaging the controller and enter into current-limited charging. Battery reverse connection protection If the battery is reversely connected, the system will simply not operate so as to protect the controller from being burned. Photovoltaic input side too high voltage protection If the voltage on the photovoltaic array input side is too high, the controller will automatically cut off photovoltaic input.
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Page 26: System Maintenance
power or halt charging. See the following diagram: Chg-P :/% 100% 67 68 69 70 71 72 73 74 75 76 77 78 79 Tem-MOS :/℃ Fig. 4-1 4.2 System Maintenance In order to always keep the controller's performance at its optimum level, we ◆... -
Page 27: Abnormality Display And Warnings
operations, always make sure all power supplies of the controller have been cut off! 4.3 Abnormality Display and Warnings Error display Description LED indication ERROR indicator No abnormality BAT indicator Battery flashing slowly over-discharge ERROR indicator steady on BAT indicator System flashing quickly over-voltage... -
Page 28: Battery Type Default Parameters (Parameters Set In Monitor Software)
Model ML2420 ML2430 ML2440 System voltage 12V/24V Auto No-load loss 0.7 W to 1.2W Battery voltage 9 to 35 Max. solar input voltage 100V (25°C), 90V (-25°C) Max. power point voltage Battery voltage +2V to 75V range Rated charging current Rated load current Max. - Page 29 Under-voltage warning 12.2V 12.2V 12.2V 9 to 17V return voltage Under-voltage warning 12.0V 12.0V 12.0V 9 to 17V voltage Low-voltage cut-off voltage 11.1V 11.1V 11.1V 9 to 17V Discharging limit voltage 10.6V 10.6V 10.6V 9 to 17V Over-discharge time delay 1 to 30s Equalizing charging ——...
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Page 30: Conversion Efficiency Curve
6. Conversion Efficiency Curve 6.1 12V System Conversion Efficiency MPPT 12V conversion efficiency (12V battery) Output power（W） 6.1 24V System Conversion Efficiency MPPT 24V conversion efficiency (24V battery) Output power（W）... - Page 31 7. Product Dimensions /ML2440 Product dimensions Hole positions Hole diameter Applicable wire: max. 8 AWG Product dimensions Hole positions Hole diameter Applicable wire: max. 8 AWG...
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