9dot NCORE User manual

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IMPORTANT NOTES 4
SAFETY 5
GENERAL WARNINGS AND PRECAUTIONS 5
CERTIFICATIONS AND COMPLIANCES 5
EU DECLARATION OF CONFORMITY 5
GUARANTEE 5
GENERAL DESCRIPTION 6
BASE UNIT ................................................................................................................................................................................... 7
MODULES ................................................................................................................................................................................... 8
DC Outputs ..................................................................................................................................................................................8
Battery management module ................................................................................................................................................. 10
CMD Control module ................................................................................................................................................................. 11
ACDC Power supply .................................................................................................................................................................. 12
DCDC Power supply .................................................................................................................................................................. 13
TECHNICAL SPECIFICATIONS ....................................................................................................................................................... 14
Battery voltage ......................................................................................................................................................................... 18
Nominal output current ............................................................................................................................................................ 19
Wire section ............................................................................................................................................................................... 19
Charging time ............................................................................................................................................................................20
Mode of use ............................................................................................................................................................................... 21
Priority ........................................................................................................................................................................................ 21
Always On .................................................................................................................................................................................. 21
Power management ................................................................................................................................................................. 21
Instant online ............................................................................................................................................................................. 22
Hot-swap modularity ................................................................................................................................................................ 22
Dual processor ........................................................................................................................................................................... 22
Priority loads .............................................................................................................................................................................. 22
Battery life simulation ............................................................................................................................................................... 22
Dynamic load ............................................................................................................................................................................. 22
Expandable ................................................................................................................................................................................ 22
INSTALLATION 23
Setup .......................................................................................................................................................................................... 23
POWER ON ................................................................................................................................................................................ 24
PHYSICAL INTERFACE 24
OPT PUSH BUTTON ................................................................................................................................................................... 24
LED CODING .............................................................................................................................................................................. 24
CONNECT WITH NCORE 27
COMMAND LINE INTERFACE 28
ACCESS .................................................................................................................................................................................... 28
MENU ....................................................................................................................................................................................... 29
ACTIONS ................................................................................................................................................................................... 30
SNMP INTERFACE 31
WEB INTERFACE 32
CONNECTION ............................................................................................................................................................................ 32

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ACCESS .................................................................................................................................................................................... 32
INTERFACE DESCRIPTION ........................................................................................................................................................... 33
Options bar ................................................................................................................................................................................ 34
General information .................................................................................................................................................................. 39
Output module ......................................................................................................................................................................... 40
Command module ..................................................................................................................................................................... 41
Battery Charger module .......................................................................................................................................................... 45
ACDC input module .................................................................................................................................................................. 47
DCDC input module .................................................................................................................................................................. 48
SOFTWARE UPDATE ................................................................................................................................................................... 49
Revision update ......................................................................................................................................................................... 49
Version upgrade ........................................................................................................................................................................ 51
EMERGENCY .............................................................................................................................................................................. 52
Deactivation procedure ........................................................................................................................................................... 52
ERROR CHECKING ...................................................................................................................................................................... 54
OFFICIAL DISTRIBUTORS ............................................................................................................................................................ 55

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Important notes
 Warnings and cautions must be read and understood before installing 9dot products. Otherwise, personal injury
could occur.
 The photographs, diagrams and figures contained in this manual are for illustrative purposes only. They may not
match to your installation.
 9dot will not be liable for eventual damage or injury involving its hardware if it is used in any way inconsistent with
its intended purpose, or if it is installed or used in an untested manner or is improperly maintained.
 The material in this document is for informational purposes only and is subject to change without notice. While
reasonable efforts have been made in the preparation of this document to ensure its accuracy, 9dot assumes no
responsibility for errors or omissions in this document or for the use of the information contained therein. 9dot
reserves the right to make changes to the design of the product without reservation and without prior notice to its
users.
 The operator is advised to review the drawings and illustrations contained in this manual before proceeding. If you
have any questions regarding the safe operation of this power system, please contact 9dot or your nearest 9dot
distributor
1
.
 For more information, visit www.9dot.it
For technical support, please contact:
Email: [e-mail]
9dot Srl Unipersonale ©
P. Iva/C.F. 02198340503 | REA PI – 188836
Indirizzo: Lungarno Gambacorti, 55 - 56125 - Pisa (PI) - Italia
Info: [e-mail] | Sales: [email protected] | Pec: [e-mail]
1
See the section "Official Distributors"

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Safety
This manual contains important safety instructions that must be followed during installation, operation, and maintenance
of the product. Review the drawings and illustrations in this manual before proceeding. If you have any questions regarding
the safe installation or operation of this product, please contact 9dot or your nearest 9dot representative. Save this
document for future reference. Please keep it in a safe place for future reference.
To reduce the risk of injury and to ensure continued safe operation of this product, the following terms have been
incorporated into this manual:
 ATTENTION: indicates safety information intended to prevent damage to people, materials or equipment
 IMPORTANT NOTE: additional clarifications on some features, terminology, reminders, etc.
Where they appear, please take more care and attention.
General warnings and precautions
You should read and understand the following warnings before installing the 9dot NCore and its components. Otherwise,
it could cause personal injury.
 Read and follow all instructions included in this manual.
 Don't work alone in dangerous conditions.
 Only qualified personnel may install, use, and repair this system and its components.
 Always assume electrical connections or conductors are live. Turn off all switches and recheck connections with a
voltmeter before installation or maintenance.
 In case of battery connection, installation and maintenance should be performed or supervised by experienced
personnel. Never open or damage the batteries.
 Take special care when connecting or adjusting the battery cables. An improperly connected battery cable or a
disconnected battery cable can cause arcing, fire, or explosion.
 A battery that shows signs of rupture, leakage, or swelling should be replaced immediately by authorized personnel
using a battery of the same type and rating.
 Higher ambient temperatures will shorten the life of the battery.
 Keep the installation area clean and dust-free during and after installation.
 Wear safety glasses when working in conditions that can be dangerous to the eyes.
Certifications and compliances
The NCore (base unit and modules) has been tested and found to comply with CE and IC standards.
It also complies with RoHS regulations and Part 15 of the FCC rules - this device may not cause harmful interference and
must accept any interference received. It should only be used indoors.
EU Declaration of Conformity
Hereby, 9dot S.r.l. declares that the NCore complies with the essential requirements and other relevant provisions of the
RED 2014/53/EU radio equipment directive and the 2011/65/EU RoHS directive on restrictions on the use of certain hazardous
substances in electrical and electronic equipment.
Guarantee
To know the guarantee of our products, consult with our nearest distributor. See the “Official Distributors” section of this
document.

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General description
NCore belongs to the Active Power Stations family, a new generation of power stations dedicated to telecommunications
operators.
It can accommodate: up to 3 AC or DC input modules of 800W each for a total of 2400W; a battery management module
and 5 output modules with 4 ports each individually manageable. The management system, simple and immediate, allows
remote control of commands and monitoring.
Main features:
 Easy plug-in and installation
 Fully modular, allow infrastructure expansion (up to 20 devices)
 Remote management: saving time and reducing installation costs
 Output voltage: 12V, 24V, 29V, 48V and 54V
 Battery management module for lead and lithium technologies.
This module allows complete remote management of the NCore and also provides the Web, SSH and SNMP interfaces.
Each module can operate at a different output voltage, all the ports of the same module have the same voltage and can
be controlled to turn on or off.
This module allows you to charge lead or lithium batteries. It acts as a backup power source in the event of a power outage,
as current flow goes both ways from the NCore (it will charge the batteries or draw current from them if necessary).
You can choose between alternating current and direct current sources. It is also possible to opt for a mixed solution.
BATTERY MANAGEMENT MODULE
3
INPUT MODULES
4
CMD MODULE
OUTPUT MODULES
2
1
3
4
1
2
Figure 1 – Complete base unit

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Base unit
The base unit has the capacity to install up to 5 output modules and 3 input modules in the provided housings. In addition
to the battery management module.
On the front you can see the OPT function button and the 3 LED monitors: OPTION, STATUS and ALARM.
To install the modules, we simply have to remove the metal cover and insert the desired modules. Screws are provided for
fixing on the upper face and avoiding accidental removal of the modules.
It consists of digital inputs/outputs and integrated relays, to which the “Event Management” function can be associated.
Grounding connector to protect people and equipment.
The slots indicate the presence of a fan inside the NCore to facilitate heat dissipation. In total it has 4 fan coolers.
Figure 3 – Back image of base unit
6
AUXILIARY GPIO PORT
7
GROUNDING
8
FAN COOLERS
Figure 2 – Front image of base unit
BASE
UNIT
5
5
6
8
7

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Modules
DC Outputs
They have a current and voltage sensor that allows individual monitoring and control of each of the ports.
Standard
The output voltage is unregulated, so it provides exactly the voltage of the output rail, which is usually the output of the
54V power supply.
However, as it is not internally stabilized, the output voltage could drop, as in the case of battery power or due to too high
current draw.
The output ports are not isolated from the input rail, battery, or other standard ports (including other modules).
Adjustable
It is a module designed to adapt to various voltages of use, and keep them stable regardless of the load or type of power
supply.
You can choose, via software, the output voltage from three default values: 29, 48 or 54V.
The outputs are isolated from the input rail and other modules, but not from each other.
Special case -48V
There are installations that require a -48V power supply, this option is perfectly feasible with NCore. We simply have to
choose an isolated ADJ module with the following product code: NCORE-OUT-ADJ
In this module it will be possible to select, via software, an output voltage of 48V for all the ports. So, simply by reversing
the connection wires to the ports, we will have -48V.
ATTENTION: Special attention should be paid to the fact that the module ports are isolated from the input rail and other
modules, but not from each other. This means that if we connect a -48V device to port 1, we cannot connect another device
with a + 48V voltage to the other ports of the same module. This would cause a short circuit.
Figure 4 – DC output module
Handle for module extraction
Slots for air circulation
4 DC output ports
The upper LEDs indicate the
output current intensity and the
state (on/off/fault) of each port
The lower LEDs indicate the type
of cartridge and output voltage
of each port
3
1
4
5
2

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12V
It is a module designed to supply a single fixed 12V voltage and keep them stable regardless of the load or type of power
supply.
The ports are isolated from the entry rail and other modules, but not from each other.
24V
It is a module designed to supply a single fixed voltage at 24V, and keep them stable regardless of the load or type of
power supply.
The ports are isolated from the entry rail and other modules, but not from each other.
General Purpose Input/Outpu GPIO
GPIO is a hardware interface that allows microprocessors to interact with another external device.
This pin group is controlled by the NCore device software.
All pins share the same power supply, so pay attention to possible polarity / ground reference conflicts.
The status of the pins is not persistent, therefore in case of hardware restart or firmware update they could lose the status,
to reacquire it after restart / update is completed.
Below is the detail on how to use them:
Output pins: A2 ~ A5
GND pins: A1 and A6
Use pins A2 to A5 and GND: pins A1 and A6, as a reference when connecting to other devices. This voltage is isolated from
the power supply and internal logic.
The maximum output voltage is 5V. The current is internally limited to a value of 10 mA.
Input pins: B1 ~ B5
GND pins: B1 and B6
Connects pins B1 to B5 to pins GND: B1 and B6, through a controlled switch (transistor, mosfet, relay). It is not necessary to
limit the current, it is already internally limited.
It is not necessary to power the circuit, it is already connected and internally isolated to the +5V supplied.
To ensure correct operation, limit the voltage drop on the chosen interruptor to 1V max; select a switch that resists up to
at least 6V.
Integrated relays:
Relay 1: Pins from C1 to C3
Contact Function
C1 NC relay 1
C2 Common relay 1
C3 NO relay 1
Relay 2: Pins from C4 to C6
Contact Function
C4 NO relay 1
C5 Common relay 1
C6 NO relay 1
These relays are independent and isolated from each other.
The current rating of the relays is: 3A @ 250V.

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Battery management module
The battery management module regulates the battery charging voltage and current and connects and disconnects the
battery according to the operating conditions to guarantee the energy required by the load.
It is not necessary to enter battery data or predetermined charge curves, since it is the NCore itself that calculates
automatically. It is enough to set the maximum charge current and the type of battery connected from the interface.
Charging phases
The module performs three charging phases that will be adapted to the type of battery chosen:
1. First charging phase, at constant current
2. Second charging phase, at constant voltage
3. Third phase of charging, maintenance (deactivated in the case of lithium batteries)
Thermistor
The module has the possibility to connect an external temperature sensor (called thermistor) to monitor the temperature
of the batteries. This sensor is supplied with the battery management module.
A longer thermistor can be connected. We just have to make sure that the thermistor is compatible with the NCore curve
(10 KOhm, Beta coefficient 3380, NTC thermistor).
The thermistor is used to correct the battery charge curve, automatically compensating for temperature variation.
If the batteries reach a temperature outside the recommended limits, the use of the external thermistor protects the
batteries by suspending the charge.
It is possible not to use the external thermistor by selecting the use of the internal one from the interface. In this case, the
system considers that the batteries are set at 25 ° C, does not adapt the charging curve and does not interrupt charging in
case of overheating.
ATTENTION: The use of the internal thermistor, in the presence of high external temperature, could cause irreparable
damage to the batteries and to that which is in the vicinity.
Figure 1 – Battery management module
Handle for module extraction
Slots for air circulation
LEDs indicate basic information
relating to the operation of the
battery module
Battery connector with its polarity
External connector for thermistor
sensor
Battery management module
switch
Start button
5
4
7
6
2
1
3

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IMPORTANT NOTE: If the internal thermistor is to be used, the external one must not be connected. It could cause the
battery management module to malfunction. The temperature value shown on the web interface is always the one
measured on the internal PCB (not on the external thermistor even if the latter has been selected).
Start button
As can be seen in the image, the NCore is equipped with a small start button (START) that is used only when it is necessary
for the NCore to be started by the battery management module, that is, without the use of the power supply modules.
CMD Control module
If the CMD module is connected, the NCore provides Wi-Fi and Ethernet connection. This module is also hot swappable,
but network and access settings are not automatically copied to the new module.
Communication with the network and control of the system are two independent functions entrusted to two different
controllers. If communication between the NCore and the network is interrupted or if a software update is in progress, the
system will continue working. The NCore can also work without the CMD module, but you will not be able to count on the
benefits of remote management.
The CMD controller mainly manages the communication between NCore and the network, and in particular:
 Acquires sensor data and makes it available to the different interfaces.
 Generates Wi-Fi signal for connection. It is also possible to use the NCore as a Wi-Fi router, enabling the NAT
option from the interface and configuring the Ethernet interface as WAN.
Label
This module will have a label attached, with relevant information for the remote connection.
Figure 6 – CMD Control module
Figure 7 – Example label attached to the CMD module
RJ45 connector for physical
connection to the network
Handle for module extraction
LEDs indicate module activity, Wi-Fi
status, power type, and operating
mode
3
1
2

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As we can see, on the label we will find the product code: NCORE-CMD, the user's credentials and the default IP number,
the serial number that will also be used to detect the SSID signal of the Wi-Fi and the ID of the software that is a unique
identification of the device.
The image of the garbage container indicates that this equipment should not be placed in household containers. Instead,
it must be disposed of correctly in compliance with current regulations
ACDC Power supply
They supply 54V power from the low-voltage AC grid, at 800W each.
With 3 slots available, the power that can supply is 2400W.
The efficiency of the module increases as current absorption increases, since "constant" losses are predominant by
construction.
It is recommended to use an ACDC module in the range between 7A and 14A (nominal current), or between 350W and 750W
(in power) for optimal efficiency.
Figure 8 – ACDC Power supply
VDE connector for AC power to the
module
Handle for module extraction
Slots for air circulation
Fixing mechanism to prevent
involuntary removal
LEDs indicate correct range of AC
input voltage and active DC voltage
3
1
4
2
5

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DCDC Power supply
They supply 54V power taking energy from a 40 to 72 V direct current source, rated at 800 W.
The connector is the same as the battery connector, but has the polarity reversed.
There are 3 usage scenarios for this power supply:
 Powered by battery, which will only discharge.
 Powered by a direct current micro-grid.
 Powered by photovoltaic panel.
A hybrid ACDC and DCDC power supply is also possible: when the ACDC is at maximum load, the DCDC kicks in to
compensate for the additional current required.
ATTENTION: If the power of the photovoltaic panel, the battery or the micro-grid are insufficient to power the loads, the
DCDC power supply module goes into protection.
Figure 9 – DCDC Power supply
DC power connector to the module
with its polarity
Handle for module extraction
Slots for air circulation
LEDs report correct input voltage
and active module output
3
1
2
4

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Technical specifications
BASE UNIT
Product code
NCORE
-
BASE
ELECTRICAL SPECIFICATIONS
GPIO MODULE
OUTPUT PINS
Output pins A2 ~ A5
GND output A1 and A6
Maximum output voltage [V] 5
Corrente uscita current [mA] 10, internally limited
State Not persistent
INPUT PINS
Input pins B1 ~ B5
GND input B1 and B6
Power supply [V] 5, internally powered and isolated
Input current limit Internally limited
State Not persistent
INTEGRATED RELAYS
Pins relay 1 C1, C2 and C3
Function C1 NC relay 1
Function C2 Common relay 1
Function C3 NO relay 1
Current relay 1 [A] 3 @ 250V
Pins relay 2 C4, C5 and C6
Function C4 NO relay 2
Function C5 Common relay 2
Function C6 NC relay 2
Current relay 2 [A] 3 @ 250V
MECHANICAL SPECIFICATIONS
Dimensions (LxWxH) [mm] 483 x 285 x 88
Weight [Kg] 9,4
Material Varnished iron
ENVIRONMENTAL SPECIFICATIONS
Operating ambient temperature [°C] -10 to +55
Non-condensing operating ambient
humidity [%]
0 to 95

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OUTPUT MODULES
Product code NCORE-OUT NCORE-OUT-ADJ NCORE-OUT-12V NCORE-OUT-24V
ELECTRICAL SPECIFICATIONS
Operating voltage [V] Input rail or battery voltage: 36 to 72 DC
Output voltage [V] 40 a 54 29 48 54 12 24
Regulated voltage no si si si si si
Typical current per
port
[A] (*)
3
3
3
3
3
3
Typical power per module [W] (**) 640 230 380 400 150 250
Led indicators Tension; load percentage
Power connector 3.3 mm
2
wire terminal block, 4 ports
Typical efficiency [%] 94
Isolation I/O [V] 1500
Active protection Against overvoltage; against overload
MECHANICAL SPECIFICATIONS
Dimensions (LxWxH) [mm] 277 x 86 x 40
Weight [Kg] 1.7
Material Varnished iron
ENVIRONMENTAL SPECIFICATIONS
Operating ambient temperature [°C] -10 to +55
Non-condensing operating ambient
humidity [%]
0 to 95
IMPORTANT NOTES:
 (*) It is possible to obtain a current value of 3A per door if the operating temperature is lower than 45 °C. Above this
temperature, consider a typical current per port of 2.6A.
 (*) (**) Note that, although each output port supports a certain current, the total consumption of all ports will be
limited by the typical power of the module
2
.
Example :
Suppose we have a NCORE-OUT-ADJ output module and we configure it through software so that its output voltage is
54V. According to the technical specifications of this module, each port can power a device that consumes up to 2.6A (@
55 °C) and this is absolutely true. However, we need to be careful because in this case the power will be limited by the
typical power of the module, which is 400W.
In this way we can connect up to four devices so that a total current of 7.4A is not exceeded, a value obtained by dividing
the power of the module by its voltage.
In other words, in the given example, we will be able to connect:
 Up to four devices consuming approximately 1.8A
 two devices consuming 2.6A and two devices consuming 1.1A
 one device consuming 2.6 A and three devices consuming 1.5A each
 And any other possible configuration without exceeding the consumption of 7.4A
2
See the following example

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CONTROLLER MODULE
Product code NCORE-CMD
ELECTRICAL SPECIFICATIONS
Operating voltage [V] 5
Ethernet connector Jack RJ45 armored
Led indicators Module activity; Wi-Fi status; power type; operating mode
Transmission speed
10BaseT; 100BaseT
MECANICAL SPECIFICATIONS
Dimensions (LxPxH) [mm] 277 x 56 x 40
Weight [Kg] 0.5
Material Varnished iron
ENVIRONMENTAL SPECIFICATIONS
Operating ambient temperature [°C] -10 to +55
Non-condensing operating ambient humidity [%] 0 to 95
POWER MODULES
Product mode
NCORE
-
ACDC
NCORE
-
DCDC
ELECTRICAL SPECIFICATIONS
Operating voltage [V] 90 to 264 [AC] 36 to 75 [DC]
Typical power [W] 800
Power connector VDE (IEC C14 male, standard 60320) 16 mm
2
wire terminal block
Led indicators AC ok; DC ok DC input ok; DC output ok
Active protection Short circuit protection; against overvoltage; against overload
Isolation I / O [V] 1500 2250
Output voltage [V] 54
Typical efficiency [%] 88 95
MECHANICAL SPECIFICATIONS
Dimensions (LxPxH) [mm] 277 x 86 x 40
Weight [Kg] 1.1
Material Varnished iron
ENVIRONMENTAL SPECIFICATIONS
Operating ambient temperature [°C] -10 to +70 -10 to +55
Non-condensing operating ambient humidity [%] 0 to 95

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BATTERY MANAGEMENT MODULE
Product code NCORE-BATTERY
ELECTRICAL SPECIFICATIONS
Nominal charge voltage [V] 48
Maximum charge voltage [V] 56.8
Charge current [A] 1; 5; 10 (selectable from software)
Power connector
Terminal block of
16 mm
2
Led indicators CP: Charging phase; FAULT: Fault; BP: Battery presence; CB:
Circuit braker status
Typical efficiency [%] 92
MECHANICAL SPECIFICATIONS
Dimensions (LxPxH) [mm] 277 x 86 x 40
Weight [Kg] 0.4
Material Varnished iron
ENVIRONMENTAL SPECIFICATIONS
Operating ambient temperature [°C] -10 to +55
Non-condensing operating ambient humidity [%] 0 to 95

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Recommended batteries
In case of temporary power outages network, it provides for the addition of a backup battery.
If you intend to add a battery to avoid the risk of interrupting the power supply to connected equipment, it must have
certain characteristics to function effectively.
ATTENTION: Batteries can emit gases that are harmful to the skin, eyes and respiratory tract, which are also flammable
and could cause breakage or explosion of the container.
ATTENTION: Very high ambient temperatures will reduce battery life.
Battery voltage
We must pay special attention to the choice of battery technology and its charging voltage.
Here are some examples of case studies on some options that can be connected to the NCore and others that cannot, to
clarify the concept of battery voltage:
OPTION
BATTERY
TYPE
NOMINAL
VOLTAGE
LOAD
VOLTAGE
NUMBER OF
BATTERIES
GROUP
VOLTAGE
MAXIMUM
LOAD VOLTAGE
1 Lead-acid 12 14,4 4 48 57,6
2 Lithium-Ion
(NMC)
3,7 4,2 14 51,8 58,8
3 Lithium-Ion
(NMC)
12 12,6 4 48 50,4
4 Lithium-Ion
(NMC)
48 54,6 1 48 54,6
5 Lithium-Ion
(NMC)
52 58,8 1 52 58,8
6 LiFePO4 3,2 3,6 16 51,2 57,6
7 LiFePO4 12 14,6 4 48 58,4
8 LiFePO4 48 58,4 1 48 58,4
Table 1 – Practical cases on types of batteries that can or cannot be connected to the NCore
As shown in the table above, options 3 and 4 should not be connected to the NCore, as their maximum charge voltage is
less than the maximum voltage value of the battery management module.
ATENTION: Do not connect a battery whose charging voltage is lower than that of the NCore's maximum charge
3
. Doing
so could cause the battery to explode.
Surely there are many other cases that can be analyzed, but that is not the objective of this manual. If you have any
questions about the configuration of the battery that will be connected to the NCore, please contact the nearest distributor
or our technical support by email: [e-mail]
As an example, below is a connection diagram to obtain 48 VDC with 4 batteries (Lead or LiFePO4) of 12 VDC:
3
See the "Technical specifications" section

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In normal operation, the battery management module begins to disconnect loads when the battery voltage reaches 43V.
This gradual disconnection of the loads will cause small voltage increases in the battery that can be seen reflected in the
corresponding parameters of the web interface. Once all loads are disconnected, only the NCore base unit and CMD
module will be powered, so the voltage drop will be very slow. After reaching 40V, the module shuts down, as long as there
is no other power source.
The NCore allows the battery to discharge to and no more than 40V, to prevent over discharge and possible damage.
The battery is considered valid up to the minimum voltage threshold, after which the battery power is turned off.
In order not to damage the batteries, the software tries to avoid the complete discharge of the battery and in case of
excessive discharge, it disconnects it directly.
Here are some simple calculations to determine some essential battery parameters:
Nominal output current
Sufficient to allow the supply of all essential loads
𝐼 = [𝑇𝑜𝑡𝑎𝑙 𝑐𝑜𝑛𝑠𝑢𝑚𝑝𝑡𝑖𝑜𝑛 𝑖𝑛 𝑊𝑎𝑡𝑡𝑠]
[𝐵𝑎𝑡𝑡𝑒𝑟𝑦 𝑣𝑜𝑙𝑡𝑎𝑔𝑒]
ATTENTION: Check that the battery can take the maximum load current.
Wire section
For the connection to the battery, we recommend a sufficient wire section to allow powering all loads without significant
voltage drops. Therefore, precautionary reference sections are given, considering the maximum installable power and
considering a negligible over-temperature:
Maximum wire length [m] 0,1 0,5 1 2
Battery bipolar wire section [mm
2
] 3 5 8 16
Battery bipolar wire section [AWG] 12 10 8 6
Table 2 – Examples of wire sections for each length
Lower wire sections can be used, taking into account possible heating of the wire.
ATTENTION: Pay close attention to the correct polarity of the battery connector when connected.
Battery charge
Choose the battery charge, depending on the required autonomy, using the following formula:
𝐴ℎ = [𝑇𝑜𝑡𝑎𝑙 𝑐𝑜𝑛𝑠𝑢𝑚𝑝𝑡𝑖𝑜𝑛 𝑖𝑛 𝑊𝑎𝑡𝑡]∗[𝐻𝑜𝑢𝑟𝑠 𝑟𝑎𝑛𝑔𝑒 𝑟𝑒𝑞𝑢𝑖𝑟𝑒𝑑]∗[2: 𝐿𝑒𝑎𝑑, 1.2: 𝐿𝑖𝑡ℎ𝑖𝑢𝑚]
[𝐵𝑎𝑡𝑡𝑒𝑟𝑦 𝑣𝑜𝑙𝑡𝑎𝑔𝑒]
Figure 10 – External wiring of batteries to obtain 48 VDC

20
NCORE
MANUAL
VER.
2
REV.
1
Example :
Total consumption: 500 W
Hours range required: 6
Battery type: Lead (2)
Battery voltage: 48V
Following the formula,
𝐴ℎ = [500]∗[6]∗[2]
[48] = 125 𝐴ℎ
This is a first approximation of the available load.
Once the battery is connected to the NCore, the discharge cycle can be started to find out the actually usable charge.
Charging time
The battery charging time depends on the type of battery, the nominal charge of the battery (considering a complete
discharge) and the charging current.
𝐶ℎ𝑎𝑟𝑔𝑒 𝑡𝑖𝑚𝑒 = [𝐴ℎ 𝑏𝑎𝑡𝑡𝑒𝑟𝑦] [1.2: 𝐿𝑒𝑎𝑑, 1: 𝐿𝑖𝑡ℎ𝑖𝑢𝑚]
[𝐶ℎ𝑎𝑟𝑔𝑒 𝑐𝑢𝑟𝑟𝑒𝑛𝑡] + [4ℎ: 𝐿𝑒𝑎𝑑, 0: 𝐿𝑖𝑡ℎ𝑖𝑢𝑚]
The charging current can be selected from the interface between 1A, 5A or 10A.
Example
:
Battery amper hour: 125 Ah
Type of battery: Lead (1.2)
Charge current (1, 5 o 10A): 5A
Following the formula,
𝐶ℎ𝑎𝑟𝑔𝑒 𝑡𝑖𝑚𝑒 = [125]∗[1.2]
[5] + 4 = 34 ℎ
ATTENTION: for batteries with nominal capacity greater than 125Ah, do not select a charge current greater than 5A.
Power required to recharge the batteries
To have a certain charging current, make sure you have enough power to dedicate to the battery, in addition to the power
required by the connected devices. Indicative values are shown below to facilitate the calculation:
Charge curent [A] Power required [W]
1 60
5 300
10 600
Table 3 – Charge current versus required power
The battery charger includes both lead-acid and lithium batteries.