Projecta Intelli-GRID 48V System
INVCHR4-48V — All-in-One Inverter/Charger
IGCMD18 — 18 Output Master Control Module
LB105-48HDC — 48V 105Ah Lithium Battery
IGD-BT7-48 — 7" Bluetooth Monitor
IGD-BT10-48 — 10" Bluetooth Monitor, where fitted
PMTPMS — Tyre Pressure Monitoring System Module
PMLVL — Levelling Sensor
PMWSW4 — Wireless Switch
PMWS200 / PMWS400 — Water Tank Probes
The Projecta Intelli-GRID 48V system is a high-powered power management system designed for RV, caravan and off-grid applications.
The system combines a 48V lithium battery, inverter/charger, DC-DC charging, solar charging, AC transfer, Bluetooth monitoring, load control, water tank monitoring and optional sensor inputs.
The system is designed to manage power, lighting, water and sensor information through a colour touchscreen display with Bluetooth connectivity.
The Intelli-GRID 48V system may include the following components:
INVCHR4-48V all-in-one inverter/charger
IGCMD18 18 output master control module
LB105-48HDC 48V 105Ah lithium battery
7" Bluetooth colour monitor with 10m lead
Optional 10" Bluetooth colour monitor
Remote battery switch
Battery communication cables
Master control module and inverter communication cables
Water tank probes
Levelling sensor
Tyre pressure monitoring system
Wireless switches
The Intelli-GRID 48V system includes:
4000W inverter/charger
48V lithium battery system
AC transfer switch
70A AC charging capability
1500W DC-DC charging from vehicle alternator
1800W solar MPPT charging
Bluetooth monitor and mobile app support
18 output load control module
Water tank level monitoring
Tyre pressure monitoring, where fitted
Levelling sensor support
Gas sensor pairing support
Wireless switch support
Solar automatic wake-up function
Low voltage battery protection
Generator auto start/stop support
The Intelli-GRID 48V system contains high voltage components and lithium battery technology.
Always follow these precautions:
Do not open or service internal components unless qualified.
Do not use the system to charge non-rechargeable batteries.
Only use compatible 48V lithium batteries between 35Ah and 700Ah.
Ensure batteries are installed in a well-ventilated area.
Keep children away from the system and accessories.
Do not expose components to water unless the part is rated for that environment.
Do not continue using the system if there is smoke, burning smell, abnormal heat, damage or repeated faults.
240V AC wiring must be performed by a qualified electrician.
The system uses the Projecta LB105-48HDC 48V high discharge lithium battery.
Key battery details:
Nominal capacity: 105Ah
Nominal energy: 5.37kWh
Nominal voltage: 51.2V DC
Charge voltage: 56.8V DC
Maximum charging current: 100A
Continuous discharge current: 100A
Maximum discharge current: 150A
Built-in fuse: Yes
IP rating: IP67 and IP69K
Weight: 47kg
The system is designed for compatible 48V lithium batteries. The manual states the system can only charge 48V lithium batteries from 35Ah to 700Ah.
Always confirm battery compatibility before installation.
The INVCHR4-48V is an all-in-one inverter/charger that provides:
4000W inverter output
AC mains charging
AC transfer switching
DC-DC charging from vehicle alternator
MPPT solar charging
48V battery management integration
The inverter provides:
Continuous output: 4.0kVA / 4.0kW
Peak power: 8.0kW
AC output: 240V ±3%, 50Hz ±1%
The AC charger can provide up to 70A charging current.
The MPPT solar charger supports:
PV input voltage range: 18V to 60V
Maximum PV short circuit current: 60A
Maximum charge from PV panels: 1800W
Maximum charging current: 30A
The DC-DC charger provides up to 1500W from a 12V vehicle input.
The default vehicle charge current is set at 65A. The manual recommends using suitable cabling to support this current for normal run length in a caravan system.
The 7" colour monitor displays and controls:
Battery state of charge
Battery charging and discharging status
Solar charging information
Vehicle charging information
Inverter/charger status
AC input source
Water tank levels
Load control
Light control
Pump control
Sensor information
Alarms and warnings
Bluetooth connection status
System settings
A blue Bluetooth icon indicates that the mobile app is connected to the system.
Yes.
The monitor can control switchable outputs such as lights, pump, water heater, 12V outputs and spare outputs, depending on the installation configuration.
The home screen displays:
Time and date
Indoor and outdoor temperature
Bluetooth connection status
Battery state of charge
Battery charging or discharging state
Solar input power
Vehicle charger input
Inverter/charger status
Water tank levels
Shortcut keys for power, hot water and pump
Alarm status
The battery display can show:
Whether the battery is charging or discharging
Battery voltage and current
Battery state of charge
Time remaining to full or empty
Vehicle charger power
Solar charger power
Inverter/charger power
The Load Control page allows the user to turn configured outputs ON or OFF.
When a load is ON, the icon turns white and a green dot appears.
When a load is OFF, the icon turns grey and the green dot disappears.
Each load channel can also display real-time power consumption and current.
A red dot indicates a load fault, such as:
Overcurrent
Short circuit
Wiring fault
Load fault
Check the load and wiring before restarting the output.
Yes.
The Light Load page allows configured lighting circuits to be turned ON or OFF.
The system also displays real-time current and power consumption for each lighting channel.
Yes.
Lighting circuits are memory retentive. If PWR is switched OFF to conserve power, the same lighting selection can return when PWR is switched ON again.
The system can support:
Water tank level probes
Levelling sensor
Tyre pressure monitoring system
Gas bottle level sensors
Temperature sensors
The levelling sensor helps show whether the RV is level when parked.
Calibration should be performed with the RV level from front to back and side to side.
The TPMS module monitors tyre pressure before and during travel.
It can provide high and low pressure warning information, depending on the sensor setup.
The gas sensor page shows the gas level available in compatible gas cylinders.
The settings menu allows changes to:
Screen brightness
Time and date
Sleep time
Buzzer setting
Temperature unit
Load names
Water tank names
Icons
Solar automatic wake-up function
Firmware information
Bluetooth name and password
Sensor settings
RV model type
Yes.
Loads and water tanks can be renamed from the settings menu.
The load icon can also be changed when renaming the load.
Yes.
The display screen Bluetooth name and Bluetooth pairing password can be set from the Bluetooth settings page.
This is used for Intelli-GRID mobile app connection.
Check the following:
Bluetooth is enabled on the phone or tablet.
The correct Intelli-GRID Bluetooth name is selected.
The correct pairing password is entered.
Only one device is actively connected at a time.
The display is powered and operating normally.
The mobile device is within range.
Firmware updates are performed using a USB drive inserted into the back of the display.
After inserting the USB drive, an update firmware pop-up should appear automatically.
The update page includes:
Upgrade — used to select and update firmware for each module.
Import — used to select and update customised logos.
Only approved firmware files should be used.
Off — No solar input
Slow flashing green — Solar input detected but MPPT not working
Green ON — MPPT charger is working
Off — No AC input
Slow flashing green — AC input detected but not charging or bypassing shore supply
Fast flashing green — AC charger is working
Green ON — Bypass power supply is working
Off — Alternator input not working
Slow flashing green — Alternator input detected but DC-DC not working
Fast flashing green — 48V battery is charging from the starter battery or powering loads
Green ON — 12V alternator is charging the 48V battery
Off — 48V battery not detected
Slow flashing green — 48V battery connected
Fast flashing green — Inverter power assist function working
Green ON — Inverter is working
Off — No alarm
Fast flashing yellow — Alarm condition present
Off — No fault
Fast flashing red — Fault condition present
Yes.
The Intelli-GRID system can manage a generator using a two-wire dry contact system.
When the relay closes, the generator turns ON.
When the relay opens, the generator stops.
The generator must be compatible with two-wire start operation.
Generator mode is accessed from the home screen by pressing the generator button.
The user can select generator mode and configure start and stop conditions based on battery state of charge.
Check the following:
The remote battery switch is connected.
The battery switch polarity is correct.
The LB105-48HDC battery is connected correctly.
Battery communication cables are connected.
The inverter and master control module are connected correctly.
The master control module has 12V supply.
All main fuses are fitted and not blown.
The battery has sufficient charge.
If the system still does not turn on, stop troubleshooting and contact support.
Check the following:
Display cable is connected to the IGCMD18 master control module.
The display has power supply from the system.
The master control module is powered.
The display cable is not damaged.
The system battery switch is ON.
Check the following:
48V battery is connected and switched ON.
Battery SOC is sufficient.
Inverter LED status is checked.
Fault LED is not flashing red.
AC loads do not exceed inverter rating.
AC wiring has been installed by a qualified electrician.
Battery communication cable is connected.
If the inverter fault remains, disconnect non-essential loads and contact support.
Check the following:
The inverter is switched ON from the display.
The appliance load is within the inverter rating.
The battery has sufficient charge.
The system is not in ECO mode.
The AC output circuit is not tripped.
There is no active alarm or fault.
Check the following:
Solar panels are connected correctly.
PV positive and negative are not reversed.
Solar input voltage is within range.
Solar panel open circuit voltage does not exceed the charger limit.
Solar LED status is checked.
The panels are receiving sunlight.
Solar isolators and fuses are ON and not blown.
Check the following:
Vehicle engine is running.
Alternator input wiring is connected correctly.
The DC-DC LED status is checked.
Input fuses are fitted and not blown.
Vehicle battery voltage is suitable.
The system is wired according to the installation guide.
Cable size is suitable for the current and length of the installation.
Check the following:
AC mains input is connected.
AC input LED status is checked.
The AC charger is enabled.
Battery SOC is below the charge stop setting.
AC input protection has not tripped.
No alarm or fault is active.
A red indicator on a load channel means the channel has detected a fault.
Possible causes include:
Overcurrent
Short circuit
Faulty appliance
Incorrect wiring
Damaged cable
Excessive load on the channel
Turn the load OFF, inspect the circuit and wiring, and only restart after the issue has been corrected.
Check the following:
Correct probe length is installed for the tank.
Probe wiring is connected correctly to the IGCMD18.
Tank type and name are configured correctly in the display.
Sensor settings have not been changed incorrectly.
Probe is clean and installed at the correct depth.
Recalibrate the levelling sensor.
Before calibration:
Park the RV on level ground.
Ensure the RV is level front to back and side to side.
Go to the sensor settings page.
Select level sensor calibration.
Press calibrate.
Check the following:
TPMS module is connected to the system.
Sensors are paired correctly.
Sensor batteries are not flat.
The correct RV model layout is selected.
The tyre sensors are fitted to the correct wheels.
The display is receiving sensor data.
Check the following:
Compatible Bluetooth gas gauge is being used.
Gas feature is enabled in settings.
Sensor pairing is started from the Gas Sensor page.
The SYNC button on the gas sensor is pressed long enough.
The sensor is within Bluetooth range.
The second gas sensor is paired separately if fitted.
Installation should be carried out by a suitably qualified installer.
Any 240V AC wiring must be completed by a licensed electrician.
Before powering the system, check:
Battery cables are connected with correct polarity.
Inverter battery cables are connected correctly.
Battery communication cable is connected.
Master control module cables are connected correctly.
Remote battery switch is connected.
Display cable is connected.
Water tank, level, TPMS and optional sensors are connected correctly.
All required fuses are installed.
AC input and output wiring has been completed safely.
To maintain the system:
Keep components clean and dry.
Inspect wiring and connections regularly.
Check for signs of heat, corrosion or loose terminals.
Keep firmware updated using approved files only.
Do not store the battery fully discharged.
Recharge the system periodically if the RV is not being used.
Check sensor batteries where applicable.
The Intelli-GRID 48V system is covered by the warranty terms stated in the instruction manual.
The manual lists a 5-year warranty against defects in materials and workmanship under normal use.
Warranty does not cover damage caused by misuse, abuse, incorrect installation, incorrect operation, modification, water ingress where not permitted, or failure to follow the product instructions.
If the issue continues after completing the troubleshooting steps, stop using the system and contact Projecta support.
Please provide:
Product model
System components fitted
Battery model and serial number
Inverter/charger model
Display model
Description of the issue
Photos of the installation
Any alarm or fault messages shown
LED status on the inverter/charger
Battery SOC and voltage
Whether the issue occurs on solar, vehicle charging, AC charging or inverter output