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Table of Contents
Summary of Contents for MLT Inverters Nomad 80
- Page 1 NOMAD 80 User Manual...
- Page 2 © 2017 MLT Inverters Edition – May 2017 NOMAD USER MANUAL PAGE...
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Page 3: Table Of Contents
Table of Contents Introduction .......................... 6 Warnings and Cautions ....................6 Contacting MLT Inverters .................... 7 1.2.1 Product Support....................7 1.2.2 Contact Details ..................... 7 1.2.3 Telephone ......................7 System Specifications ....................8 1.3.1 System Ratings ..................... 8 1.3.2 Battery Input ......................8 1.3.3 Efficiency ...................... - Page 4 4.1.3 Making the electrical connections ..............15 Charge Controller Operation Indicators................17 Solar Status ......................... 17 Charge controller Status .................... 17 Battery Status ......................17 Interface ..........................18 System Icons ....................... 18 Dashboard ........................18 Control Panel ......................19 Graphing and Logs ...................... 20 6.4.1 Solar Output Graphs ..................
- Page 5 Selecting ground fault reference ................32 8.1.1 Battery Positive ....................32 8.1.2 Photovoltaic/Battery Negative ................. 32 8.1.3 Photovoltaic Positive ..................33 8.1.4 PV Floating ......................33 External Connections ......................34 Batteries ..........................35 10.1 General ........................35 10.1.1 Sealed Lead-Acid Batteries ..............35 10.1.2 Deep Cycle Lead-Acid Batteries ..............
- Page 6 Figures Figure 1: De-rating the Nomad charge controller output power at high altitude ....... 9 Figure 2: Identifying parts of the Nomad ..................10 Figure 3: Wall mounting ........................ 15 Figure 4: Input/output connections on the Nomad ..............16 Figure 5: GFDI Jumper Selection (Bottom Cover Removed) ............33 NOMAD USER MANUAL PAGE...
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Page 7: Introduction
CAUTION: Proper grounds, disconnecting devices, e.g. bypass boxes and other safety devices and their location are the responsibility of the user and are not provided by MLT Inverters. CAUTION: Do not cover the device or store it in a small space - always keep it well ventilated and well away from flammable gases or powders. -
Page 8: Contacting Mlt Inverters
1.2 Contacting MLT Inverters 1.2.1 Product Support When contacting Product Support via telephone, email or fax please provide the following information for the fastest possible service: Charge controller model number Serial number Battery type Battery bank capacity ... -
Page 9: System Specifications
1.3 System Specifications 1.3.1 System Ratings Nomad 80 Charge Controller Number of Input Ports 2 (Individual MPPT Control) Input Vmp Voltage Range 65 - 375 Vdc per port Maximum Input Voltage 400 Vdc Nominal Photovoltaic Power (24/36/48V) 1000 W / 1500 W / 2000 W (per port) -
Page 10: Climatic Conditions
Architecture Forced Air Cooling Compliance IEC62109-1 1.3.5 Climatic Conditions Ambient Temperature -10 to 60 °C (derated above 40°C) -25 .. 70 °C Ambient Transport Temperature Maximum Ambient for Rated Power 40 °C Relative Humidity (Non-Condensing) 5 .. 85 % Maximum Altitude for Rated Power 1000 m above sea level (Power derated for High Altitude) 1.3.6... -
Page 11: Figure 2: Identifying Parts Of The Nomad
Figure 2: Identifying parts of the Nomad PAGE NOMAD USER MANUAL... -
Page 12: Advanced Features
Advanced Features 2.1 Two Independent Maximum Power Point Trackers The Nomad contains two fully independent MPPTs, perfect for residential applications where PV arrays often face in a variety of directions. Connecting such PV strings to separate MPPTs can increase energy yields significantly compared to combining all strings into one MPPT. -
Page 13: Auxiliary Relay Control
2.6 Auxiliary Relay control A single, no voltage dry-contact auxiliary relay can be controlled with the user settings menu. This relay can be used to control external load relays, or any other simple binary logical circuit you can think of. 2.7 MLT Bridge Communications (Optional Add-on) The Bridge external optional add-on enables browser-based internet monitoring and control of the Nomad charge controller. -
Page 14: Solar Calculations
Solar Calculations 3.1 Open Circuit Input Calculations The Nomad PV input ports has an operating range of 65-350Vdc. When choosing the number of panels in series to connect to each Nomad port, consult the PV panel Maximum panels per string ≤ 375 / (���� + (����... -
Page 15: Mounting And Electrical Connections
Mounting and Electrical Connections Installing the Nomad charge controller For optimal performance, please refer to the following instructions regarding the installation and setup of your newly purchased Nomad. 4.1.1 Selecting a suitable location When selecting a location to mount your charge controller, take note of the following: The Nomad charge controller should be mounted indoors, in a well-ventilated area out of direct sunlight, where the ambient temperature does not exceed 45°C (derating applies). -
Page 16: Making The Electrical Connections
Ensure that any electrical connections is dead before touching any potential live wiring. Certain electrical connections must be appropriately trained person. If in doubt about anything, contact MLT Inverters for assistance. Remove the screws that secure the removable bottom cover. -
Page 17: Figure 4: Input/Output Connections On The Nomad
Note: External protection devices such as fuses, DC-circuit breakers and earth-leakage protection are the responsibility of the owner, and not of MLT Inverters. MLT Inverters cannot be held responsible for personal injury, death or damage to property or equipment caused by the improper use or installation of this equipment. -
Page 18: Charge Controller Operation Indicators
Charge Controller Operation Indicators On the front panel of the Nomad charge controller there is three LED status indicators: Charge Controller Solar status Battery status status 5.1 Solar Status Green – The Nomad charge controller is active and there is sufficient power in order to charge the batteries. -
Page 19: Interface
Interface The Nomad HMI (Human Machine Interface) is a full colour 4.5” touchscreen interface. This chapter covers using the interface to set up the Nomad charge controller. 6.1 System Icons There are four system icons on the right hand column. Pushing on the icon select the current screen. Dashboard Control Panel Graphing... -
Page 20: Control Panel
The green Battery icon shows the battery voltage and the current that is charging the battery. The bars within the icon are an indication of the state charge of the battery bank, with four bars implying a full charge and one bar implying battery critical. The directional arrow indicates which direction the power is flowing. -
Page 21: Graphing And Logs
6.4 Graphing and Logs 6.4.1 Solar Output Graphs The solar input screen graphically shows the amount of solar power that each of the two inputs delivers. Input one is plotted in red and input two is plotted in blue. 6.4.2 Solar Sweep Graph PAGE NOMAD USER MANUAL... -
Page 22: Battery Graphs
The solar sweep graph plots solar power vs voltage. This can be used by your installer to check if the panels are performing optimally. 6.4.3 Battery Graphs The battery graph screen graphically illustrates the depletion or replenishing of the battery bank. The green, orange and red bar on the left is a rough indication of charge left. - Page 23 Event logs are viewable on this interface screen. It is sorted in a descending list by time and date. General events are marked in black and critical events, typically causing charge controller shutdown, are marked in red. The following events are logged: 6.4.4.1 Start The charge controller has been turned on and the system started.
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Page 24: Settings
6.5 Settings 6.5.1 Settings Menu Selecting Alarms, Date & Time, Relay Control, MPPT Settings and Battery Setup will take you to their respective setting screen. 6.5.2 Setup Alarms NOMAD USER MANUAL PAGE... -
Page 25: Date & Time
6.5.2.1 Beep Click on the beep square to toggle on and off. Beep implies that the charge controller will sound an audible noise, at a once per second interval. 6.5.2.2 The SMS function is only available if a Bridge communications module is attached to the Nomad. 6.5.3 Date &... -
Page 26: Relay Control
6.5.4 Relay Control A single, no voltage auxiliary relay can be controlled with the above three user settings. Please see section 2 for more details on how to use this relay settings. Since there is only one relay, setting more than one option will perform action for all three states. The typical use for the setting all three is to start a generator when the battery goes low or the load is higher than is economical to run purely of batteries The relay will open again once a bulk charge is completed. -
Page 27: Mppt Settings
6.5.5 MPPT Settings 6.5.5.1 Sweep Interval When the battery cycle is activated in the settings menu, the following system operation will be applicable (Please ensure that the Date & Time is set correctly.): 6.5.5.2 Independent Tracking If selected (selected by default), each of the two solar input ports will be independently controlled. Deselecting the ports, links them together and they will track the maximum power point together. -
Page 28: Battery Setup
6.5.6 Battery Setup 6.5.6.1 Battery Setup – Access Code Before entering the custom Battery Setup screen, a password will be requested. The password is hard coded to 1918. 6.5.6.2 Battery Voltage Setpoints NOMAD USER MANUAL PAGE... - Page 29 Under the Battery Voltage Setpoints page it is possible to fine-tune and adjust the various battery charging options. Please see the Battery chapter and set according to the battery manufacturer’s specifications. 6.5.6.2.1 Bulk Initiate The battery will be kept at a float voltage, until the battery voltage falls below the bulk initiate value. Thereafter a bulk charge will be initiated.
- Page 30 6.5.6.3.3 Equalise interval The charge controller will automatically do an equalise charge once this timer has elapsed. 6.5.6.3.4 Max charge current The maximum current that the batteries will ever be charged at. 6.5.6.4 Battery Wizard The Battery Wizard screen allows the user to quickly select some pre-configured options. Depending on the selection it will pre-set the battery options as below: (24 / 36 / 48V) Sealed Lead-Acid...
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Page 31: Faults And Warnings
Faults and Warnings 7.1 Fault/Warning screen Above is a typical warning message. There are two options: Reset – Clears the error and resets the system. This will re-enable the charge controller and it will start to export power again. Ignore – This removes the warning message and allows the user control of the HMI interface. After making the needed corrections, the charge controller must be manually reset by selecting the appropriate option from the control menu. -
Page 32: High Solar Voltage
7.2.3 High Solar Voltage One or both of the two solar ports has a too input voltage. Once the input voltage returns to an acceptable level, the charge controller will resume battery charging. 7.2.4 Incorrect Nominal Voltage If the battery voltage is far outside the acceptable nominal range, the charge controller will suspect operation until the correct nominal voltage is selected. -
Page 33: Ground Fault Detector Interrupter (Gfdi)
Ground Fault Detector Interrupter (GFDI) A ground fault is the undesirable condition of current BAT+ flowing through the grounding conductor. The cause of this undesirable current flow is an unintentional electrical BAT-/PV- connection between a current-carrying conductor in the PV system and the equipment grounding conductor. PV1+ This can create a number of hazards since the normally grounded current-carrying conductor may no longer be at... -
Page 34: Photovoltaic Positive
8.1.3 Photovoltaic Positive Some solar panels need to be positively grounded in order to stop ionisation on the panels. This ionisation can cause a reversible loss of performance. Select this option if your solar panel needs to be positively grounded. 8.1.4 PV Floating If you wish to leave the photovoltaic panels floating, do not select any jumpers. -
Page 35: External Connections
External Connections Name Description Pin 1 Normally Open Relay The output of the onboard relay is tied to Normally Open/Normally Closed pin respectively. Pin 2 Normally Closed Relay The relay will toggle depending the Relay Settings. Pin 3 Relay Common See 6.5.4 Relay Control for options. -
Page 36: Batteries
Phosphate (LiFePO ). Some Lithium batteries can be used with the Nomad charge controller please contact MLT Inverters for details of recommended Lithium packs. 10.2 Battery Bank Location When selecting a suitable location for your battery bank, take the following into consideration: Some batteries packs must be installed in a well-ventilated environment. -
Page 37: Replacing A Battery
Providing the site is maintained correctly, a good quality battery bank should last for the full number of rated cycles before needing replacement. 10.4 Replacing a Battery Always replace a battery with a battery of the same type and capacity. Never replace a flooded lead- acid battery with a maintenance free battery or vice-versa. -
Page 38: Battery Charger Settings
The total charging period is approximately 10 hours in this example, but can be much shorter depending on depth of discharge, charging current and load. 10.5.1.1 Stage 1: Bulk Constant Current Charge Period (Hours 0-8) This is the first stage of charge using a constant current until the either the bulk voltage is reached. At the end of this stage, the battery is around 80% full. -
Page 39: Lithium Battery Charging
Caution: Always configure battery charging currents according to manufacturer limits. These limits may differ from the above formula. The limits in the table below was correct at time of publication, but manufacturers may change the limits. Capacity Maximum Charge Current Royal 95E41R 100 Ah (C20) 10 A... -
Page 40: Battery Charger Settings
The Nomad can charge certain Lithium-based battery banks. Lithium batteries are typically charged much faster than Lead-Acid based batteries, and at higher currents. Please see the MLT Inverters website for full information regarding compatible battery banks. 10.6.1 Battery charger settings It is important to select the correct charging current and voltage for your batteries during the installation of your Nomad. -
Page 41: Trouble Shooting
HMI control panel, will sound. If you have a fault that is not addressed in this manual then you should contact the person who installed your Nomad or MLT Inverters product support. See ‘Contacting MLT Inverters’ on Page 7. 11.2 Typical Problems 11.2.1... -
Page 42: Glossary
Glossary Alternating current. The utility, generators, and inverters can supply AC. The AC voltage to homes in South Africa is described as 230V AC 50Hz meaning 230V RMS that is alternating between a positive voltage and a negative voltage 50 times a second. Direct current. -
Page 43: Appendix A: Sample Single Line Wiring Diagram
Appendix A: Sample Single Line Wiring Diagram PAGE NOMAD USER MANUAL... - Page 44 NOMAD USER MANUAL PAGE...
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