AIMS Power MPPT+ Series User manual

AIMS POWER
AIMS MPPT+ SERIES
SOLAR CHARGE CONTROLLER
SCC40MPPT / SCC80MPPT
Installation and Ope ation Manual
MANUAL VER.1, 1111

CONTENTS
Chapter 6 Trouble Shooting.......................................................................................................6-1

Introduction
The AIMS MPPT+ is a highly reliable solar battery charger an its most critical feature is to maximize
the harvest energy from the PV array into the battery by using a vance technology of Maximum
Power Point Tracking (MPPT). The battery types that the AIMS MPPT+ will charge inclu e Floo e
Lea Aci (FLA), GEL , AGM chemistries in the range of 12V c, 24V c, 36V c an 48V c nominal.
The high efficiency of charging ability can be accomplishe through a 2 or 3 or 4-stage charger
epen ing on the battery type. It was esigne with built-in protection circuitry to ensure batteries will
not be over or un er charge .
The wi e range of the input array voltage an output battery voltage are well applie to the solar
system to allow system planner to pro uce the most of the solar energy. The input PV array of the
SCC40MPPT an SCC80MPPT may be wire in the range of 16~192V c nominal. The output battery
voltage is accepte from 12 to 48V c nominal. After wiring up an operation, the built-in intelligent
ata logging system can track the state of charge (SOC) an the harvest power pro uce over time.
AIMS MPPT+ may not only be use in solar systems but also in win or hybri systems. With respect
to these systems, the 2 auxiliary relays can be programme by constants setting. The functions an
programming of the relays help to control the ump loa s. Multiple AIMS MPPT+ with cables (up to
16 units) can be connecte in larger power systems. The controller with optional rectifier an braking
unit for win system is require to control an stop the control from overloa con ition cause by
excessively high win spee s.
.
Please carefully rea through this manual an all the installation instructions an wiring before
beginning installation of your AIMS MPPT+. The protection an installation equipment shoul comply
with local co es. The rate fuses, breakers an external lightning protection shoul be installe along
with AIMS MPPT+.
Features
Integrates Maximum Power Point Tracking (MPPT), battery charge management, state of charge
information.
Continuous output Power Rating without e-rating at up to 50 ambient temperature. ℃
Built-in Battery Energy Monitor tracks power pro uction an consumption in or er to
calculate the energy remaining in the battery bank. State of charge (SOC) is isplaye in
percentage of full capacity, Amp-hours, Watt-hours, an 90 ays of energy-harvest history an is
store in the solar charger.
Supports Floo e Lea Aci (FLA), GEL, Absorbe Glass Mat (AGM) batteries; 2/3/4-stage
charging with a justable set points for all parameters.
Wire the PV mo ules in series up to 192VDC normal (240VDC Max) for SCC40MPPT Series,
SCC80MPPT Series.
Easy stacking of up to 16 units in parallel for high currents.
Precision charging of 12V/ 24V/36V/48V batteries with easy set-up. Use of battery voltage sense
(BVS) wires is require .
Built-in temperature compensation function for safe an complete charging.

Specification
Mo el No. SCC40MPPT MPPT SCC80MPPT MPPT
Maximum output current
(Continuous at up 50℃
ambient temperature)
40 Amps 80 Amps
Battery Voltages 12, 24, 36, 48 VDC Normal
Max PV Input Current 30 Amps 70 Amps
Input Voltage Range
16~192VDC Operating
240VDC Maximum
Open Circuit Voltage
Max PV Array Power
2600 Watts
(Maximum when equalizing a 48V
battery to 64V at 40 Amps)
5200 Watts
(Maximum when equalizing a
48V battery to 64V at 80 Amps)
Charge Regulation Mo es Bulk, Absorption, Float, Auto/ Manual Equalization
Battery Temperature
Compensation 5.0 mV per , per 2 volt cell℃
DC to DC Conversion
Capability
12V Battery: 16~192VDC
24V Battery: 32~192VDC
36V Battery: 48~192VDC
48V Battery: 64~192VDC
Display Status
Built-in 2-line, 20-character LCD with backlight
LCD status screen isplays input voltage an current, output voltage
an current, charge-mo e, Battery SOC
Data Logging Logs energy harveste for 90 ays, LCD isplays WH, KWH, AH
Energy Monitor LCD shows SOC, AH, WH, an present charge or ischarge current. A
50mV/ 500Amp shunt is require
Auxiliary Relays Two in epen ent relays A (SPST) for control of external evices.
Contact rating is 3 Amps, 50VDC
Operation Temperature Full Power Output to +50 ambient℃
Stan by Power < 2 Watts < 4 Watts
Dimension 267.6 x 196 x 147 mm 414.8 x 225 x 147 mm
Weight 4.3 Kgs 7.1 Kgs

Di ension for SCC40MPPT
Unit: mm
Fig-1

Di ension for SCC80MPPT
Unit: mm
Fig-2

Chapter 1 Installation
1.1 Load Requirement
The AIMS MPPT+ series plays a major role in planning your PV system. The first step in planning an
efficient PV system is to calculate the load requirement. In order to calculate the anticipated load
requirement, it is important to determine a erage and peak load consumption. The possible load growth
should also be taken into consideration when planning the load requirement because loads hardly
remain static and they grow more frequently than they reduce.
1.2 Battery Voltage System
After the estimate of the power requirement, the required power from the battery will be the next
consideration in planning the system. According to the basic rule of the electricity, “Current is the
power di ided by oltage”, when the power amount increases, it is suggested to raise the battery
oltage so the current amount will decrease. The principle is based on the larger amount of current that
exists, the more expensi e the circuit protection is. In an example of the 96 watt load, it draws 4 amps
at 24V battery system but it draws only 2 amps at 48V system. Cable size thus also decreased as
current is decreased. It is another reason to up the Voltage in larger systems.
1.3 PV Array Voltage
As the AIMS MPPT+ is a smart DC to DC con erter design, the specification of a PV array is much
like sizing a grid tie in erter. Installers choose the max. and min. Vmp and Voc of each string and how
many strings are needed.
1. Maximum Voc
The maximum operating oltage of the SCC40MPPT and SCC80MPPT is 240Vdc. The protection will
be acti e to shut down the unit when the operating oltage is higher. PV array manufacturers ha e the
published data sheet with rated oltage and current as well as the current and temperature coefficients.
The rated Voc is measured in the temperature of 25℃ so when calculated at lower temperature such as
0℃, 25% increase of the rated Voc is expected. At different temperatures dependent on location, the
maximum Voc of the module should be determined by the Voc oltage temperature coefficient and after
that, a series string oltage may be determined as well.

1.5 Shunt (BCS)
The Shunt is an optional component and it is required for the AIMS MPPT+ to achie e the optimal
operation le els. It also functions as a hub for connecting measurement sensors. The main purpose of
the shunt is to allow the AIMS MPPT+ to measure current drawing into and out of the battery bank.
DC load centers are where the AIMS MPPT+ Shunt is recommended to be placed. Installing it in an
electrical enclosure is also acceptable. Locating the Shunt is essential for safety. Please note that the
capacity of the Shunt is 50mV, 500Amp.
See page 2-3 for wiring connection terminal.
1.6 Battery Temperature Sensor (BTS-3)
The battery temperature sensor BTS-3 is used to compensate charging by adjusting charging oltage up
or down according to the temperature detected by the sensor.
See page 2-3 for wiring connection terminal.
The AIMS MPPT+ requires BTS-3 to be connected for all charging features to be a ailable. AIMS
MPPT+ is able to operate without the sensor, but Absorption Trigger set points will be lower and
equalization stage will be disabled. BTS-3 can be mounted on the battery posts.
1.7 Battery Voltage Sensing (BVS)
Connect the red wire to a battery positi e bus and the black wire to a battery negati e bus within the
DC load center. See page 2-3 for wiring connection terminal. Two sense wires may be connected to
compensate possible battery cable loss during charging. Be sure to obser e correct polarity when
installing oltage sense wires or damage will result.
1.8 Wiring Diagram
Before starting to initiate the AIMS MPPT+, keep all breakers in the OFF position. When you are ready
to start the AIMS MPPT+, turn on ONLY the Battery breaker. Do NOT turn on the PV breaker until the
instruction on LCD shows during AIMS MPPT+ initialization. The internal electric circuit of the AIMS
MPPT+ can only be powered by the batteries.
The installation en ironment of AIMS MPPT+ should be in an area of good entilation. Ne er locate
the AIMS MPPT+ in a poorly entilated battery area because batteries emit explosi e gases. Do not
locate the AIMS MPPT+ within 1 meter of the batteries to ensure a safe distance.
See next page for the wiring diagram of SCC40MPPT as an example.

Fig-4

1.9 Installation Steps
Example: SCC40MPPT
Before starting the SCC40MPPT, keep the breakers, controllers in OFF position.
1. Locate the battery and AIMS MPPT+ Series and make sure the safety distance is at least 1 meter
long.
2. Install a 100 Amp rated DC breaker and connect it to the Battery +.
3. Install a Shunt rated 500A/50mV and connect it to the Battery –.
4. Connect the BAT+ terminal of the AIMS MPPT+ to the DC breaker.
5. Connect the GND terminal (next to BAT+) of the AIMS MPPT+ to the Shunt.
6. Install a 90 Amp rated DC breaker and connect it to the PV array + and also to the PV+ terminal of
the SCC40MPPT.
7. Connect the PV array – directly to the GND terminal (next to PV+) of the SCC40MPPT.
8. Connect the EARTH terminal of the SCC40MPPT to the system ground.
9. To measure the current drawing into and out of the battery, connect the BCS+ terminal of
SCC40MPPT to the Shunt + and connect the BCS- terminal of SCC40MPPT to the Shunt –.
10. To compensate the battery charging due to the temperature difference, connect the BTS+ terminal
of SCC40MPPT to BTS-3 Battery Temperature Sensor +and connect the BTS- terminal of
SCC40MPPT to BTS-3 Battery Temperature Sensor –.
※ BTS-3 should be located on the battery posts –.
11. To compensate the possible battery cable loss, connect the BVS+ terminal of the SCC40MPPT to
Battery +, connect the BVS- terminal of the SCC40MPPT to Battery –.
12. Finally, connect the DC load+ to the Battery+ and DC load – to Battery – through the Shunt.