Projecta LB105-48HDC
Projecta LB105-48HDCJ
Intelli-GRID 48V LiFePO4 Lithium Battery
51.2V 105Ah Lithium Battery
High Discharge Lithium Battery
The Projecta LB105-48HDC is a 51.2V 105Ah LiFePO4 lithium battery designed for Intelli-GRID 48V power systems, caravan, RV, inverter and high-power auxiliary applications.
It provides high discharge capability, built-in State of Charge monitoring, communication ports, built-in fuse protection and remote battery switching.
The LB105-48HDC is designed for 48V systems and is suitable for high-power inverter applications when installed correctly and used within the battery’s rated limits.
The LB105-48HDC includes:
51.2V 105Ah LiFePO4 battery
5.37kWh nominal energy
100A maximum discharge current
150A peak discharge current
Suitable for powering 4000W inverters
Built-in current shunt for accurate State of Charge, SOC
Built-in fuse protection
Remote battery switch capability
Communication ports for Intelli-GRID systems
Parallel battery connection support
Mounting feet for installation
Long cycle life lithium iron phosphate technology
Low self-discharge
46.4kg battery weight
Built-in protection against over-voltage, under-voltage, over-current, high temperature, low temperature and short circuit
The LB105-48HDC is designed for 48V power systems, including:
Caravans
RVs
Intelli-GRID systems
Off-grid power systems
48V auxiliary battery systems
High-power inverter systems
Parallel 48V battery banks
Yes.
Suitability depends on:
Inverter size
Battery State of Charge
Cable size
Fuse and circuit protection
Number of batteries installed
System configuration
Continuous and peak load requirements
No.
The LB105-48HDC includes a built-in current shunt to provide accurate State of Charge, SOC.
This removes the need to purchase an additional current shunt when used with compatible Projecta Intelli-GRID systems.
Use a compatible 48V lithium charger or Projecta Intelli-GRID charging system suitable for LiFePO4 batteries.
The charger must match the battery’s voltage and current requirements.
The LB105-48HDC charge voltage is:
56.8V
The maximum charge current is:
100A
The standard charge current is:
52.5A
Do not charge the battery:
Above 58.4VDC continuously for more than 24 hours
Using a charger with automatic desulfation mode
Using an incompatible lead-acid-only charger
With reverse polarity
With damaged cables or connectors
Outside the battery’s operating temperature range
Automatic desulfation modes are not suitable for LiFePO4 lithium batteries.
Yes.
The LB105-48HDC includes a remote battery switch function to isolate the system during storage.
The LB105-48HDC includes communication ports for Intelli-GRID systems.
Communication allows compatible system devices to read battery information such as State of Charge and system status.
The communication link helps the Intelli-GRID system monitor the battery correctly.
It supports accurate SOC readings and system integration when connected to compatible Projecta components.
Yes.
LB105-48HDC batteries can be connected in parallel up to 4 batteries.
This can create up to:
48V 420Ah battery bank
No additional series connection is required for a 48V system.
Do not connect batteries in series unless confirmed by a controlled Projecta instruction or technical approval.
Before connecting batteries in parallel:
Fully charge all batteries independently.
Rest all batteries before connection.
Confirm all batteries are the same model and capacity.
Confirm battery voltages are closely matched.
Use the correct Projecta parallel cables.
Confirm polarity before making connections.
Use suitable circuit protection.
Ensure all terminals and connectors are clean and secure.
When batteries are connected in parallel, the discharge currents are additive.
A discharge factor of 0.75 must be applied to determine the actual continuous discharge current.
Example:
2 x LB105 batteries in parallel
2 x 100A x 0.75 = 150A continuous discharge current
The following cables for parallel connection:
LB-48HDC-PAR — 1.2m parallel cable
LB-48HDC-EXT — Optional 1.2m negative extension cable
The parallel wiring diagram shows the master battery connected to the second battery using the parallel cable and optional extension cable.
Before installing or using the LB105-48HDC:
Do not short-circuit the battery.
Do not reverse polarity.
Do not disassemble the battery.
Do not deform or modify the battery.
Do not charge beyond 58.4VDC continuously for more than 24 hours.
Do not use a charger with automatic desulfation mode.
Store the battery in a cool, dry and well-ventilated area.
Charge the battery at least every 3 months or when voltage drops below 46.4VDC.
Ensure the battery is fully discharged before proper disposal.
Keep terminals and screw holes clean and secure.
Protect the battery from sudden impact or crushing during transport.
If the 48V battery is allowed to discharge too deeply, the battery voltage can fall to a level that may cause permanent damage.
If the battery voltage falls below 40V, or if any internal battery cell drops below its safe operating voltage, the battery may be permanently damaged.
Yes.
Deep discharge may occur due to continuous small loads, also known as parasitic draw, from connected equipment even when the caravan is not in use.
The damage caused by deep discharge, including damage resulting from parasitic draw, is not covered under warranty.
Store the battery:
In a cool, dry and well-ventilated area
Away from direct heat sources
Away from moisture
Away from flammable materials
Away from corrosive substances
Protected from impact or crushing
To maintain battery life, recharge the battery fully every 3 to 6 months.
The warning section also states the battery should be charged at least every 3 months or when voltage drops below 46.4VDC.
If the connected load will not be used for an extended period:
Disconnect the battery from the load, or
Turn the battery OFF
This helps prevent battery discharge and over-discharge.
Regularly check:
Battery terminals are clean
Terminal screws are secure
Communication cables are connected
Battery case is not damaged
Battery voltage remains above the required storage level
No signs of overheating, swelling or physical damage are present
Check the following:
Battery switch is ON.
Battery voltage is above discharge cut-off.
Battery terminals and cable connectors are secure.
Positive and negative cables are connected correctly.
Main fuse or circuit breaker is not blown or tripped.
Connected load does not exceed the battery rating.
Battery protection has not activated.
Communication cables are connected correctly.
Battery has not been deeply discharged below safe operating voltage.
Check the following:
Battery State of Charge is sufficient.
Inverter size is suitable for the battery setup.
Continuous load does not exceed the battery’s continuous discharge rating.
Surge load does not exceed peak discharge rating.
Battery cables are correctly sized.
Fuse or circuit breaker rating is suitable.
Cable connections are tight.
Multiple batteries are correctly connected if a larger system is required.
Check the following:
Charger is suitable for 48V LiFePO4 batteries.
Charge voltage is set correctly.
Charger is not using desulfation mode.
Charger polarity is correct.
Battery switch is ON if required by the system.
Battery terminals and connectors are clean and tight.
Battery temperature is within operating range.
Battery protection has not activated.
Battery voltage has not fallen below the recoverable range.
Do not continue charging if the battery becomes hot, swollen, damaged or behaves abnormally.
Recharge the battery using a suitable 48V LiFePO4 charger or compatible Projecta Intelli-GRID charging system.
If the battery voltage has dropped below 46.4VDC during storage, recharge the battery before further use.
If the battery voltage has dropped below 40V, permanent damage may have occurred. Stop using the battery and contact Projecta support.
Check the following:
Battery is connected to a compatible Projecta communication system.
Communication cable is connected correctly.
Battery bank is configured correctly.
All batteries are linked correctly in parallel if multiple batteries are installed.
Battery has completed a full charge cycle.
The correct battery model and capacity are selected in the power management system.
Check the following:
All batteries were fully charged independently before connection.
All batteries were rested before connection.
All batteries are the same model and capacity.
Parallel cables are connected correctly.
Communication cable is connected correctly.
Battery bank setup is configured correctly in the Intelli-GRID system.
Battery voltages are closely matched.
The LB105-48HDC includes protection against:
Over-voltage
Under-voltage
Over-current
High temperature
Low temperature
Short circuit
If protection activates, remove the cause of the fault before attempting to use or charge the battery again.
Part number: LB105-48HDC / LB105-48HDCJ
Battery type: LiFePO4 lithium battery
Nominal voltage: 51.2V
Nominal capacity: 105Ah
Nominal energy: 5.37kWh
Charge voltage: 56.8V
Discharge cut-off voltage: 46.4V
Standard charge current: 52.5A
Maximum charge current: 100A
Maximum discharge current: 100A
Peak discharge current: 150A
Operating temperature: -30°C to 63°C
Maximum batteries in parallel: 4
Number of discharge cycles: 3000
Weight: 46.4kg
IP rating: IP67
The LB105-48HDC has an IP67 rating.
Install the battery in a suitable location where it is protected from impact, crushing, incorrect wiring and excessive heat.
Before installation:
Confirm battery polarity.
Use the correct Projecta battery cables.
Use suitable circuit protection.
Secure the battery correctly using its mounting feet.
Ensure terminals and screw holes are clean and tight.
Confirm communication cables are fitted correctly.
Confirm the charger is suitable for 48V LiFePO4 batteries.
Confirm the battery is protected from impact and crushing.
Confirm all batteries are charged and rested before connecting in parallel.
Escalate the case if:
The battery will not charge after charger and wiring checks.
The battery will not power a load after switch, fuse and wiring checks.
The battery case is swollen, cracked, deformed or damaged.
The battery has been short-circuited or reverse connected.
The customer reports smoke, burning smell, abnormal heat or sparking.
The battery repeatedly enters protection mode.
Communication with Intelli-GRID does not work.
A parallel battery setup is not communicating or reporting SOC correctly.
The battery voltage has dropped below 40V.
Deep discharge or parasitic draw damage is suspected.
The battery has been incorrectly charged using desulfation mode.
Warranty assessment is required.