Renogy MPPT20CC User Manual

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MPPT20CC

14288 Central Ave., Suite A Chino, CA 91710

RENOGY 20A Maximum Power Point Tracking Solar Charge Controller Manual

1-800-330-8678

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Contents

1. Important Safety Information 2

2. General Information 3

2.1 Overview 3

2.2 Optional Accessories 5

3. Installation Instructions 6

3.1 General Installation Notes 6

3.2 Mounting 6

3.3 Wiring 7

4. Operation 10

4.1 MPPT Technology 10

4.2 Battery Charging Information 12

4.3 LED Indications 13

4.4 Setting Operation 15

5. Protections, Troubleshooting and Maintenance 19

5.1 Protection 19

5.2 Troubleshooting 20

5.3 Maintenance 21

6. Warranty 22

7. Technical Specifications 23

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1. Important Safety Information

Save These Instructions

This manual contains important safety, installation and operating instructions for the MPPT20CC controller. The following symbols are used throughout this manual to indicate potentially dangerous conditions or mark important safety

instructions. Please take care when meeting these symbols.

WARNING: Indicates a potentially dangerous condition. Use extreme

caution when performing this task.

CAUTION: Indicates a critical procedure for safe and proper operation

of the controller

NOTE: Indicates a procedure or function that is important for the safe

and proper operation of the controller. General Safety Information

• Read all of the instructions and cautions in the manual before beginning installation.

• There are no user serviceable parts inside the MPPT20CC. Do not

disassemble or attempt to repair the controller.

• Disconnect the solar module and fuse/breakers near to battery before installing or adjusting the MPPT20CC.

• Install external fuses/breakers as required.

• Do not allow water to enter the controller.

• Confirm that the power connections are tightened to avoid excessive

heating from a loose connection.

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2. General Information

2.1 Overview

The RENOGY MPPT series controller is suitable for off-grid solar applications. It protects the battery from being over-charged by the solar modules and overdischarged by the loads. The controller features a smart tracking algorithm that maximizes the energy from the solar PV module(s) and charge the battery. At the same time, the low voltage disconnect function (LVD) will prevent the battery from over discharging.

The MPPT20CC controller charging process has been optimized for long battery life and improved system performance. The comprehensive self-diagnostics and electronic protection functions can prevent damage from installation mistakes or system faults. In addition, the MPPT20CC controller has a RJ45 interface to allow communication with a meter for remote monitoring. The MPPT20CC has

the following features:

• 12V / 24V auto recognition.

• Advanced maximum power point tracking technology to optimize the use

of the PV system.

• Peak conversion efficiency of 97 %, high Tracking efficiency of 99%.

• Fast sweeping of the entire I-V curve, several seconds tracking speed.

• Widely used, automatic recognition of day and night.

• Timer function with 1-15 hour option for streetlight.

• Unique dual timer function; enhance the flexibility lighting systems.

• Sealed, Gel and Flooded battery option.

• Adopting temperature compensation and correcting the charging and

discharging parameters automatically, improving battery lifetime.

• Electronic protection: Overcharging, over-discharging, overload, and short circuit.

• Reverse protection: Any combination of solar module and battery, without

causing damage to any component.

• Excellent thermal design and natural air-cooling.

• RJ45 interface for use with the remote meter MT-5, convenient to check

operating parameters of controllers.

Although the MPPT20CC controller is very simple to configure and use, please take your time to read the operator's manual and become familiar with the controller. This will help you make full use of all the functions and improve your solar PV system.

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Description of MPPT20CC controller:!

Figure 2-1 MPPT20CC Characteristics

1. Charging Status LED indicator

2. Battery Status LED indicator

3. Temperature Sensor

4. Setting Indicators

5. LED Digital Display the load work mode and status.

6. Setting Button (in manual mode used for load ON/OFF)

7. Solar Module Terminals

8. Battery Terminals

9. Load Terminals

10. RJ45 Communication Interface (for remote meter MT-5)

RJ45

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2.2 Optional Accessories

Remote Meter (Model: MT-5)

The digital remote meter displays system operating information, error indications,

and self-diagnostics read-out. Information is displayed on a backlit LCD display. The large numerical display and icons are easy to read and large buttons make navigating the meter menus easy. The meter can be flush mounted in a wall or surface mounted using the mounting frame (included). The MT-5 is supplied with 2 m of cable and a mounting frame. The MT-5 connects to the RJ45 port on the

MPPT20CC.

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3. Installation Instructions

3.1 General Installation Notes

• 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.

• Uses insulated tools and avoid placing metal objects near the batteries.

• Explosive battery gasses may be present during charging. Be certain

there is sufficient ventilation to release the gasses.

• Avoid direct sunlight and do not install in locations where water can enter

the controller.

• 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.

• Use with Gel, Sealed or Flooded batteries only.

• Battery connection may be wired to one battery or a bank of batteries. The

following instructions refer to a single battery, but it is implied that the battery connection can be made to either one battery or a group of

batteries.

• Select the system cables according to 3A/mm2 current density.

3.2 Mounting

NOTE: When mounting the MPPT20CC, ensure free airflow through the controller heat sink fins. There should be at least 150mm of clearance above and below the controller to allow for cooling. If mounted in an

enclosure, ventilation is highly recommended.

WARNING: Risk of explosion! Never install the MPPT20CC in a sealed

enclose with flooded batteries! Do not install in a confined area where

battery gas can accumulate.

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Step 1: Choose mounting location

Locate the MPPT20CC on a vertical surface protected from direct sunlight, high

temperature, and water.

Step 2: Check for Clearance

Place the MPPT20CC in the location where it will be mounted. Verify that there is sufficient room to run wires and that there is sufficient room above and below the controller for airflow.

Step 3: Mark Holes

Use a pencil or pen to mark the four (4) mounting hole locations on the mounting

surface.

Step 4: Drill Holes

Remove the controller and drill four sizeable holes in the marked locations.

Step 5: Secure Controller

Place the controller on the surface and align the mounting holes with the drilled holes in step 4. Secure the controller in place using the mounting screws.

3.3 Wiring

NOTE: A recommended connection order has been provided for

maximum safety during installation.

NOTE: The MPPT20CC is a negative ground controller. Any negative connection of the solar module, battery or load can be earth grounded.

CAUTION: Don’t connect the loads with surge power exceeding the

ratings of the controller.

CAUTION: For mobile applications, be sure to secure all wiring. Use cable clamps to prevent cables from swaying when the vehicle is in motion. Unsecured cables create loose and resistive connections, which may lead

to excessive heating and/or fire.

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Step 1: Battery Wiring

WARNING: Risk of explosion or fire! Never short circuit battery

positive (+) and negative (-) or cables

Figure 3-1 Battery wiring

Before connecting the battery, measure the battery voltage. It must be over 9V to power the controller. For 24V, the voltage must be greater than 18V to properly detect a 24V battery. The 12/24V battery detection is automatic and the check is

only performed at start-up.

Wire an in-line fuse holder no more than 150mm from the battery positive terminal. Do not insert a fuse at this time. Confirm the connection correct and then turn on the power.

Step 2: Load Wiring

The MPPT20CC load output can connect DC electronic devices of which the rated voltage is the same as the battery. MPPT20CC will provide battery the voltage to the loads. See Section 4.4 Setting Operation for more details about the

load control.

Figure 3-2 Load wiring

Connect load positive (+) and negative (-) to the MPPT20CC load output as shown in figure 3-2. Exercise caution when connecting to the load terminals, there may be an existing voltage, which may cause a short circuit. An in-line fuse holder should be wired in series in the load positive (+) or negative (-) wire as

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shown. Do not insert a fuse at this time. Confirm the connection is correct and

then turn on the power.

If wiring the load connection to a load distribution panel, each load circuit should

be fused separately. The total load draw should not exceed the 20A load rating.

Step 3: Solar Module Wiring

WARNING: Risk of electric shock! Exercise caution when handling solar wiring. The solar module(s) high voltage output can cause severe shock or injury. Cover the solar module(s) from the sun before installing solar wiring.

The MPPT20CC can accept 12V or 24V nominal off-grid solar module arrays. Grid-tie solar module(s) may be used if the open circuit voltage does not exceed the maximum solar input rating. The solar module(s) nominal voltage must be

equal to or greater than the nominal battery voltage.

Figure 3-3 Solar Module wiring

Step 4: Accessories (option)

Install Remote Meter (purchased separately) if required. Refer to the instructions

provided for detailed installation procedures.

Step 5: Confirm Wiring

Double-check the wiring in step1 through 4. Confirm correct polarity at each

connection. Verify that all power terminals are tightened.

Step 6: Confirm Power-up

When battery power is applied and the MPPT20CC powers up, the battery led

indicator will be green. If the MPPT20CC does not power-up or battery status LEDs error exists, refer to Section 5 “Troubleshooting”

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4. Operation

4.1 MPPT Technology

The MPPT20CC utilizes Maximum Power Point Tracking technology to extract maximum power from the solar module(s). The tracking algorithm is fully automatic and does not require user adjustment. MPPT technology will track the array’s maximum power point voltage (Vmp) as it varies with weather conditions, ensuring that the maximum power is harvested from the array throughout the

course of the day.

Current Boost

In many cases, MPPT20CC MPPT technology will boost the solar charge current. For example, a system may have 8 Amps of solar current flowing into the charge controller and 10 Amps of charge current flowing out to the battery. The MPPT20CC does not create current! Rest assured that the power into the charge controller is the same as the power out of the MPPT20CC. Since power is the product of voltage and current (Volts × Amps), the following is true*:

• Power Into the controller = Power Out of the controller

• Volts In × Amps In = Volts Out × Amps Out

*Assuming 100% efficiency. Actually, the losses in wiring and conversion exist. 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 the battery voltage, the greater the current boost. Current boost can be substantial in systems where the solar array is of a

higher nominal voltage than the battery.

An Advantage Over Traditional Controllers

Traditional controllers connect the solar 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 11-15Vdc but the module’s Vmp is typically around 16 or 17V.Figure 4-1 shows a typical current vs. voltage output curve for a nominal 12V off-grid

module.

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Figure 4-1 Nominal 12V Solar Module I-V curve and output power graph

The array Vmp is the voltage where the product of current and voltage (Amps × Volts) is greatest, which falls on the knee of the solar module I-V curve as shown in Figure 4-1. Because Traditional controllers do not operate at the Vmp of the solar modules(s), energy is wasted that could otherwise be used to charge the battery and power system loads. The greater the difference between battery

voltage and the Vmp of the module, the more energy is wasted.

MPPT20CC MPPT technology will always operate at the Vmp resulting in less

wasted energy compared to traditional controllers.

Conditions that Limits the Effectiveness of MPPT

The Vmp of a solar module decreases as the temperature of the module increases. In very hot weather, the Vmp may be close or even less than battery voltage. In this situation, there will be very little or no MPPT gain compared to traditional controllers. However, systems with modules of higher nominal voltage than the battery bank will always have an array Vmp greater than battery voltage. Additionally, the savings in wiring due to reduced solar current make MPPT

worthwhile even in hot climates.

Typical Battery Voltage Range

Maximum

Power Point

Traditional

Controller

Range

Maximum

Power Point

Current vs. Voltage (12V System)

Output Power (12V System)

Operating

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4.2 Battery Charging Information Four Charging Stages

The MPPT20CC has a 4-stage battery-charging algorithm for rapid, efficient, and safe battery charging.

Figure 4-2 MPPT20CC MPPT charging algorithm

Bulk Charge

In this stage, the battery voltage has not yet reached boost voltage and 100% of available solar power is used to recharge the battery.

Boost Charge

When the battery has recharged to the Boost voltage set point, constant-voltage regulation is used to prevent heating and excessive battery gassing. The Boost stage remains 120 minutes and then goes to Float Charge. Each time when the controller is powered on, it checks if the battery is over-discharged or overvoltage. If none of these conditions are encountered, the controller will enter into boost charging stage.

Float Charge

After the Boost voltage stage, MPPT20CC will reduce the battery voltage to float voltage set point. When the battery is fully recharged, there will be no more chemical reactions and all the charge current transforms into heat and gas at this point. The controller reduces the voltage to the floating stage, charging with a smaller voltage and current. It will reduce the temperature of battery and prevent gassing, but charging the battery slightly at the same time. The purpose of Float stage is to offset the power consumption caused by self-consumption and small loads in the whole system, while maintaining full battery storage capacity.

In Float stage, loads can continue to draw power from the battery. In the event that the system load(s) exceed the solar charge current, the controller will no longer be able to maintain the battery at the Float set point. Should the battery voltage remains below the boost reconnect charging voltage, the controller will exit Float stage and return to Bulk charging.

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Equalize

WARNING: Risk of explosion! Equalizing flooded batteries can

produce explosive gases, so a well-ventilated battery box is necessary.

NOTE: Equipment damage! Equalization may increase battery

voltage to a level damaging to sensitive DC loads. Ensure that all load allowable input voltages are greater than the equalizing charging set point voltage.

NOTE: Equipment damage! Over-charging and excessive gas precipitation may damage the battery plates and activate material shedding on them. Too high an equalizing charge or for too long may cause damage. Please carefully review the specific requirements of the battery used in the system.

Certain types of batteries benefit from periodic equalizing charge, which can stir the electrolyte, balance battery voltage and complete chemical reaction. Equalizing charge increases the battery voltage, higher than the standard complement voltage, which gasifies the battery electrolyte.

If it detects that the battery is being over discharged, the solar controller will automatically turn the battery to equalization charging stage, and the equalization charging will be 120 minutes. Equalizing charge and boost charge are not carried out constantly in a full charge process to avoid too much gas precipitation or overheating of battery.

4.3 LED Indications

Figure 4-3 Charge controller LED indicators

LED Digital Display

Battery Indicator

Charging Indicator

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Charging Indicator

The green LED indicator will turn on whenever sunlight is available for battery charging. Under normal charging conditions, the green charging LED will stay on at all times. The charging LED indicator flashes when the battery reaches over-

voltage. Please refer to section 5 for troubleshooting.

Color

Indication

Operating State

Green

On Solid

Charging

Green

Flashing

Battery over-voltage

Table 4-1 Charging LED indicators

Battery Indicator

Color

Indication

Operating State

Green

On Solid

Normal (battery)

Green

Flashing

Full (battery)

Orange

On Solid

Low (battery)

Red

On Solid

Over Discharged (battery)*

Table 4-2 Battery LED indicators *Please refer to Chapter 5 for troubleshooting

PV Overvoltage Display

If the solar input open circuit voltage (Voc) exceeds the maximum rating, the array will remain disconnected until the Voc falls safely below the maximum rating.

Color

Indication

Operating State

Red

LED Digital Display shows letter “P"

PV Overvoltage

Table 4-3 PV Overvoltage LED Display

PV Overcurrent Display

If the solar input current exceeds the maximum rating, the array will be disconnected automatically.

Color

Indication

Operating State

Red

LED Digital Display shows letter “C"

PV Overcurrent

Table 4-4 PV Overcurrent LED Display

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Load indicator

When the load amperage is 1.25 times of rated current for 60 seconds, 1.5 times of rated current for 5 seconds (overload), or there is a load short circuit, the Battery LED indicator will be flashing RED. Please refer to section 5 for troubleshooting.

Color

Indication

Load Status

Red

Battery indicator flashing red

Overload or Short circuit

Table 4-5 Load LED indicators

4.4 Setting Operation

Dual Timer Function

Figure 4-4 Dual timer function diagram

The default night length is 10 hours. The controller can learn the night length referring to the previous night so as to adapt to the different seasons. However, it will take some time to learn it.

Notes: When the “OFF” time set on Timer 2 is later than local sunrise

time, the controller will turn off the load output at sunrise.

Load Control Settings

1. Dusk-to-Dawn (Light ON + Light OFF)

When solar module voltage goes below the point of NTTV (Night Time Threshold Voltage) at sunset, the solar controller will recognize the starting voltage and turn on the load after 10 minutes delay; When solar module voltage goes above point of DTTV (Day Time Threshold Voltage), the solar controller will recognize the starting voltage and turn off the load after 10 minutes delay.

2. Light ON + Timer (1-15H on)

When solar module voltage goes below the point of NTTV (Night Time Threshold Voltage) at sunset; the solar controller will recognize the starting voltage and turn

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on the load after 10 minutes delay for several hours which users set on the timer. The timer setting operation is referred to as “Load Work Mode Setting”.

3. Test Mode

It is used to test the system and the same as Dusk to Dawn. But there is no 10minute delay when controller recognizes the starting voltage. When below the starting voltage, the controller will turn on the load, if higher, it will turn off load. The test mode makes it easy to check the system installation.

4. Manual Mode

This mode is to turn on/off the load by the Setting button.

Load Work Mode Setting

Figure 4-5 Instruction figure on setting

Press the setting button once and the setting indicators will be changed once among Timer 1, Timer 2 and battery type.

When Timer 1 setting indicator is on, press the setting button for more than 5 seconds until the LED digital display flashes. Then press the setting button until the desired number appears according to the Table 4-6. The setting is finished when the digital display stops flashing.

Likewise, Timer 2 set-up instructions are the same as Timer 1 using Table 4-7 as reference.

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Timer 1

LED Digital No.

Disable

Dusk-to-Dawn, Load will be on all night

Load will be on for 1 hour after a ten minute delay since sunset

Load will be on for 2 hours after a ten minute delay since sunset

Load will be on for 3 hours after a ten minute delay since sunset

Load will be on for 4 hours after a ten minute delay since sunset

Load will be on for 5 hours after a ten minute delay since sunset

Load will be on for 6 hours after a ten minute delay since sunset

Load will be on for 7 hours after a ten minute delay since sunset

Load will be on for 8 hours after a ten minute delay since sunset

Load will be on for 9 hours after a ten minute delay since sunset

Load will be on for 10 hours after a ten minute delay since sunset

Load will be on for 11 hours after a ten minute delay since sunset

Load will be on for 12 hours after a ten minute delay since sunset

Load will be on for 13 hours after a ten minute delay since sunset

Load will be on for 14 hours after a ten minute delay since sunset

Load will be on for 15 hours after a ten minute delay since sunset

Test mode

ON/OFF mode

Table 4-6 Load work mode

Timer 2

LED Digital No.

Disable

Load will be on for 1 hour before sunrise

Load will be on for 2 hours before sunrise

Load will be on for 3 hours before sunrise

Load will be on for 4 hours before sunrise

Load will be on for 5 hours before sunrise

Load will be on for 6 hours before sunrise

Load will be on for 7 hours before sunrise

Load will be on for 8 hours before sunrise

Load will be on for 9 hours before sunrise

Load will be on for 10 hours before sunrise

Load will be on for 11 hours before sunrise

Load will be on for 12 hours before sunrise

Load will be on for 13 hours before sunrise

Load will be on for 14 hours before sunrise

Load will be on for 15 hours before sunrise

Table 4-7 Load work mode

Notes: If Timer 1 is Dusk-to-Dawn (0), Test mode (16) or ON/OFF

mode (17), Timer 2 will be disabled (n).

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Battery Type Setting

When the Battery setting indicator is on, press the “Setting” button and hold on 5 seconds until the battery type LED turns on. The led will be flashing. Continue to hold and the number will repeat from 1 to 3, and stop pressing until the desired

number appears according to the following setting table:

Battery type

Digital display

Sealed lead acid battery

Gel battery

Flooded battery

Table 4-8 Battery type setting

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5. Protections, Troubleshooting and

Maintenance

5.1 Protection

PV Array Short Circuit

If PV array short circuit occurs, clear it to resume normal operation.

PV Overvoltage

If PV Overvoltage occurs, the array will remain disconnected until the voltage falls safely below the maximum rating.

PV Overcurrent

If PV Overcurrent occurs, the array will be disconnected automatically.

Load Overload

If the load current exceeds the maximum load current rating, the controller will disconnect the load. Reapplying power or pressing the setting button will clear up the overloading fault.

Load Short Circuit

Fully protected against load wiring short-circuit. After one automatic load reconnect attempt. Reapplying power or pressing the setting button will clear the fault.

PV Reverse Polarity

Full protection against PV reverse polarity, no damage to the controller will result. Correct the wire connection to resume normal operation.

Battery Reverse Polarity

Full protection against battery reverse polarity, no damage to the controller will result. Correct the wire connection to resume normal operation.

Damaged Local Temperature Sensor

If the temperature sensor short-circuited or damaged, the controller will be charging or discharging at the default temperature 25°C to prevent the battery damaged from overcharging or over discharged.

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High Voltage Transients

PV is protected against high voltage transients. In lightning prone areas, additional external suppression is recommended.

5.2 Troubleshooting

Faults

Possible reasons

Troubleshooting

Charging LED indicator off during daytime when panels are in direct sunlight

PV array disconnection

Check that PV and battery wire connections are correct and tight.

Charging LED indicator is flashing green

Battery voltage higher than over voltage disconnect voltage (OVD)

Check if battery voltage over high. Disconnect the solar module.

Battery LED indicator is orange

Battery under voltage

Load output is normal, charging LED indicator will return to green automatically when fully charged.

Battery LED indicator is red

Battery over discharged

The controller cuts off the output automatically, LED indicator will return to green automatically when fully charged.

LED digital display shows “P”

PV Overvoltage

Check whether the PV parameters match with the controller’s; It will be reconnected automatically when the voltage falls safely below the maximum rating.

LED digital display shows “C”

PV Overcurrent

Check whether the PV parameters match with the controller’s. Please refer to the controller parameters for photovoltaic parameters selection.

Battery indicator is flashing red

Over load or short circuit

Overload: Please reduce the load and press the button once, the controller will resume working after 3s.

Short circuit: when the first short-circuit occurs, the controller will automatically resume to work after 10s; when a second shortcircuit occurs, press the button, the controller will resume working after 3s.

Table 5-1 Troubleshooting

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5.3 Maintenance

The following inspections and maintenance tasks are recommended at least two

times per year for best controller performance:

• Check that the controller is securely mounted in a clean and dry environment.

• Check that the airflow and ventilation around the controller is not blocked.

Clear all dirt or fragments on the heat sink.

• Check all the exposed wires to make sure insulation is not damaged for serious sun exposure, frictional wear, dryness, insects or rats etc. Maintain or replace the wires if necessary.

• Tighten all the terminals. Inspect for loose, broken, or burnt wire connections.

• Check and confirm that the LED digital display is consistent. Pay attention

to any troubleshooting or error indication. Take necessary corrective

action.

• Confirm that all the system components are ground connected tightly and correctly.

• Confirm that all the terminals have no corrosion, insulation damaged, high temperature or burnt/discolored sign, tighten terminal screws to the suggested torque

• Inspect for dirt, insects and corrosion, and clear up.

• Check and confirm that lightning arrester is in good condition. Replace a

new one in time to avoid damaging of the controller and other equipment.

Warning: Risk of electric shock! Make sure all the power is turned off

before above operations, and then follow the corresponding inspections

and operations.

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6. Warranty

The MPPT20CC charge controller is warranted to be free from defects for a period of ONE (1) year from the date of shipment to the original end user. We will, at our option, repair or replace any such defective products.

Claim procedure:

Before requesting warranty service, check the Operation Manual to be certain that there is a problem with the controller. Return the defective product to us with shipping charges prepaid if problem cannot be solved. Provide proof of date and place of purchase. To obtain rapid service under this warranty, the returned products must include the model, serial number and detailed reason for the failure, the module type and size, type of batteries and system loads. This information is critical to a rapid evaluation of your warranty claim.

This warranty does not apply under the following conditions:

1. Damage by accident, negligence, abuse or improper use.

2. PV or load current exceeding the ratings of product.

3. Unauthorized product modification or attempted repair.

4. Damaged occurring during shipment.

5. Damage results from acts of nature such as lightning or extreme weather

6. Irreclaimable mechanical damage.

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7. Tec h nic a l S pec i fi c a ti o ns

Electrical Parameters

Description

Parameter

Nominal System Voltage

12VDC/24VDC Auto recognition

Rated Charge Current

20A

Rated Load Current

20A

Maximum Battery Voltage

32V

Max. Solar Input Voltage*

100VDC

Max. PV Input Power

260W (12V), 520W (24V)

Self-consumption**

<10mA (24V)

Charge Circuit Voltage Drop

≤ 0.26V

Discharge Circuit Voltage Drop

≤ 0.15V

Communication

TTL232 / 8 pin RJ45

Table 7-1 Electrical Parameters *Array voltage should never exceed maximum PV input voltage. Refer to the solar module

documentation to determine the highest expected array Voc (Open Circuit Voltage) as defined by the lowest expected ambient temperature for the system location.

**Charging & discharging circuit closed, LED digital display OFF, remote meter MT-5 disconnected.

Battery Parameters (Temp: 25°C)

Control Parameter

Battery Charging setting

Gel

Sealed

Flooded

High Volt Disconnect

16.0V; x2/24V

Charging Limit Voltage

15.5V; x2/24V

Over Voltage Reconnect

15.0V; x2/24V

Equalization Voltage

---

14.6V; x2/24V

14.8V; x2/24V

Boost Voltage

14.2V; x2/24V

14.4V; x2/24V

14.6V; x2/24V

Float Voltage

13.8V; x2/24V

Boost Return Voltage

13.2V; x2/24V

Low Voltage Reconnect

12.6V; x2/24V

Under Voltage Recover

12.2V; x2/24V

Under Voltage Warning

12.0V; x2/24V

Low Voltage Disconnect

11.1V; x2/24V

Discharging Limits Voltage

10.8V; x2/24V

Equalize Duration

---

2 hours

Boost Duration

2 hours

Table 7-2 Battery Parameters

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Threshold Voltage

Description

Parameter

NTTV (Night Time Threshold Voltage)

5V; x2/24V

DTTV (Day Time Threshold Voltage)

6V; x2/24V

Table 7-3 Threshold Voltages

Temperature Compensation

Description

Parameter

Temperature Compensation Coefficient

(TEMPCO)*

-30mV/°C/12V (25°C ref)

Table 7-4 Temperature Compensation *Compensation of equalize, boost, float and low voltage disconnect voltage

Environmental Parameters

Environmental

Parameter

Ambient Temperature Range

-35 °C to +55 °C

Storage Temperature Range

-35 °C to +80 °C

Humidity Range

10% to 90% (NC)

Enclosure

IP30

Altitude

≤ 3000m

Table 7-5 Environmental Parameters

Mechanical Parameters

Mechanical

Parameter

Dimension

169 x 118 x 83 mm (6.65 x 4.65 x 3.28 in)

Mounting Holes

160 x 80 mm (6.30 x 3.15 in)

Mounting Hole Size

Φ 5 mm

Terminal

10 mm2

Weight

0.95 Kg (2.09 lbs.)

Table 7-6 Mechanical Parameters

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PV Power – Conversion Efficiency Curve

Illumination Intensity: 1000W/m2 Temperature: 25°C

1. Solar Module MPP Voltage (17V) / Nominal System Voltage (12V)

2. Solar Module MPP Voltage (34V) / Nominal System Voltage (12V)

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3. Solar Module MPP Voltage (68V) / Nominal System Voltage (12V)

4. Solar Module MPP Voltage (34V) / Nominal System Voltage (24V)

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5. Solar Module MPP Voltage (68V) / Nominal System Voltage (24V)

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MPPT20CC Dimensions (mm)