Powertech MP3129 User Manual
PV Charge Controller
MP3129
User's Manual
Table of Contents
Precautions and Specifications 1
1. Introduction 2
2. Control and Indicator
3. Installation and Indication 3
3.1 Connection
3.2 LED Indicator 3
3.3 LCD Display 4
3.3.1 LCD Display Sequence
3.4 The Dip Switch, Set-Buttons and Reset Button Functions
3.4.1 Adjust the PV Charge Controller Settings 4
3.4.2 Select the Auto/Manual Equalization charging and Night-Light Mode 6
4. PV Charge Control Mode
4.1 3-Stage Charge Control
4.2 Equalization Charging Mode (Automatic or Manual) 6
4.2.1 Automatic Equalization Charging 6
4.2.2 Manual Equalization Charging 6
4.3 12V DC Load Terminal- Control Mode 7
4.3.1 Low Voltage Disconnect (LVD) 7
4.3.2 Low Voltage Reconnect (LVR) 7
4.3.3 Night-Light Mode Programs 8
4.4 Temperature Sensor (Optional)
4.5 Over Temperature Protection
5. Remote Signal Terminal (Optional) 10
3
2
4
4
6
6
8
9
Precautions
1. Before using the charge/load controller, read all the instructions and cautionary markings on the
charge/load controller, the batteries and the photovoltaic panels.
2. Do not attempt to repair the controller. Incorrect re-assembly may result in a risk of electric shock or
fire.
3. To reduce risk of electric shock, disconnect all wiring before attempting any maintenance or cleaning.
Turning off controls will not reduce this risk. PV panels produce power when exposed to light – cover
them with opaque material before servicing.
4. Working in Vicinity of a Lead Acid Battery is dangerous. Batteries generate EXPLOSIVE gases during
normal operation. Provide ventilation to outdoors from the highest point of the battery compartment.
5. This charge/load controller is intended to be used with a battery supply of 12 VDC nominal voltage.
6. Be extra cautious to reduce the possibility of dropping a metal tool onto batteries. It might spark or
short-circuit batteries or other electrical parts that may cause explosion. Cover wrench handles with
plastic tape or viny l dip coating material.
Specifications
Models
Battery voltage
Maximum PV panel open circuit voltage
Continuous load/charge current
Maximum charge current (5 mins)
Maximum load current (5 mins)
Operation current(no Load and no PV)
Voltage across terminals (PV to Battery)
Voltage across terminals (Battery to Load)
Electronic Blocking
(To protect against reverse polarity connection of PV panel and to block
current from battery to PV panel when voltage of battery is higher than PV
panel)
Battery reverse polarity protection
Overcharge & Over-discharge protection
Battery status LED indication
Charging status indication
Recommended wire size
Weight
Dimension (WxDxH)
Fuse
Operating ambient temperature
Over temperature protection
Battery charging float voltage setting
Battery charging bulk voltage setting
DC load control mode (For DC load terminal):
Low Voltage Disconnect(LVD)
Low Voltage Reconnect(LVR)
MP3129
12V
26V
20A
25A
25A
30mA
0.8V
0.4V
Yes
Yes
Yes
5-State LED Indications
3-State LCD Display
#10AWG
0.47kg
150 x 85 x 45 mm
30A
-10 to 50 °C
Yes
Adjustable from 12.0-16.5V
Adjustable from 12.0-16.5V
Adjustable from 8-16V
Adjustable from 8-16V
P.1
1. Introduction
The MP3129 PV Charge Controller is designed for use with all types of 12V photovoltaic(PV)
panels/systems and different types of 12V batteries, such as wet or sealed lead acid, lead
calcium, lead antimony battery.
Numerous features are provided to maximize the performance of the system:
● Electronic Blocking ( To protect against reverse polarity connection of PV panel and block
current from battery to PV Panel when voltage of Battery is higher than PV panel),
● Suitable for PV panels with Open Circuit Voltage from 17 to 23V,
● Rated charging/load current 20A,
● PWM Charging with 3-stage Charge Control (to allow battery be left unattended for long
period),
● User Adjustable Charge Control Settings for different types of batteries,
● User Adjustable Low Voltage Disconnect and Low Voltage Reconnect,
● Build-In Microprocessor for PV charge control to maximize the charging efficiency,
● Overcharge and Over-discharge Protection,
● Over Temperature Protection,
● Short-Circuit Protection at load terminal (5) & Battery Reverse Polarity Protection at Battery
Connection Terminal (6),
● Informative LCD Display and Tri-Color LED indication of system and battery conditions,
● Optional Temperature Sensor for compensated battery charging,
● Optional Remote Signal Terminal.
2. Control and Indicator
The following diagram shows the hardware interface of the PV Charge Controller.
Figure 1 Front view of PV Charge Controller
1. Battery LED Indicator
2. LCD Display
3. Reset button (see Section 3.4)
4. Temperature Sensor (Optional )
5. 12V DC Load terminal with Low Voltage Disconnect/NIGHT-LIGHT mode (Section 4.3)
6. 12V Battery connection terminal
7. PV Panel connection terminal
8. Remote Signal Terminal (Optional )
9. Side Door (open to access switches for setting)
P.2
3. Installation and Indication
3.1 Connection
The PV Charge Controller should be connected as follow:
Figure 2 Connection of PV Charge Controller
This controller has Electronic Blocking feature, therefore, it is not necessary to connect a diode
between the PV module and the Controller.
The recommended wire size is #10AWG.
It is recommended that the PV Charge Controller should be installed in a dry, sheltered location
away from sources of high temperature and moisture.
3.2 LED Indicator
Red Flashing.................... Battery Voltage is lower than 12.6V
Constant Red................... Battery Voltage has reached Low Voltage Disconnect(LVD)
Constant Green................ Battery Voltage is higher than 12.6V
Green Flashing................ Battery Voltage has reached Bulk Charging Setting.
(Fully Charged)
Orange Flashing............... Battery Voltage is lower than Low Voltage Disconnect (LVD)
Voltage Setting and load has been disconnected.
Red-Green Flashing......... Equalization Charging in process.
Table 1 LED Indications
P.3
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