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Clayton Power Li-G4 100Ah 12V Lithium Leisure Battery

£1799.99(inc VAT) £2299.99
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  Product Description
The Clayton Power Li-G4 100Ah 12V lithium leisure battery uses LiFePO4 chemistry to deliver 1280Wh of total capacity with 1024Wh available for use. This isn't a basic drop-in replacement for lead-acid batteries. The integrated Battery Management System monitors each of the four cells individually, protecting against over-voltage (cutting out at 3.65V per cell), under-voltage (protection at 2.50V per cell), and temperature extremes from -30°C to 65°C. The system includes passive cell balancing at 1A to maintain optimal performance across the entire pack. Search terms like "lithium leisure battery 100ah" and "lifepo4 battery 12v" are common, but specifications matter more than chemistry alone when comparing options.

Built for motorhome and campervan installations, the Li-G4 handles continuous discharge of 175A with 400A available for one minute. Charging runs at 100A continuous, with the BMS allowing operation down to -20°C for discharge (though charging requires 0°C minimum). The metal enclosure measures 187mm high by 197mm wide by 343mm long, weighing 12kg, and carries IP54 rating for weather resistance. Two M8 bolt terminals provide the main DC connections (torque to 12Nm), whilst two M12 connectors offer CAN bus communication (SAE J1939 compliant) and I/O control. The M4 wake-up terminal lets you remotely control battery output, turning on above 4V and off below 3V.

One consideration: the Li-G4 requires charging every six months if not in use, and won't charge below freezing temperatures. This makes it less suitable for caravans left on seasonal pitches through winter without heated battery compartments. The battery works standalone or extends capacity for Clayton Power's LPS II range using their CD1804 or CD2402 DC-DC converters. Over 2800 cycles at 80% depth of discharge get you to 60% capacity remaining (100Ah model) or 70% (280Ah model), giving realistic expectations rather than optimistic claims. The unit ships with mounting brackets, M12 connectors, and terminal hardware, classified as UN3480 Class 9 dangerous goods for transport.

Clayton Power Li-G4 100Ah 12V Lithium Leisure Battery Features


  • The included DC-DC converter is able to transfer 600W to the LPS per hour.
  • Capacity extension to the LPS
  • Including 600W DC-DC Converter
  • Double the transfer power to 1200W using 2x Converters
  • Safe battery technology – LiFePO4
  • Integrated Battery Management System (BMS) : Cell-balancing for high performance and precise State of Charge (SOC).
  • Ready for parallel connection with the LPS
  • Integrated power switch
  • Designed for heavy duty environments and requirements
  • Metal frame and flame-retardant enclosure : Vibration and safety tested for leisure, industrial and automotive use.
  • High-energy density Li-Ion Battery Cells : High-end and compact LiFePO4 battery cells with high energy density and long lifetime.

Specifications
  • Battery type: LiFePO4
  • Capacity: 100 Ah (1280 Wh)
  • Effective capacity: 80 Ah (1024 Wh)
  • Continuous discharge current: 200 A
  • Continuous charging current: 175 A
  • Cycles: 2000 @ (25 °C, 80% DOD)
  • Nominal battery voltage: 12.8 VDC
  • Charging voltage: 14.4 VDC
  • Discharge voltage: 10.8 VDC
  • Connection terminals: M8 screw
  • Weight: 11 kg
  • Dimensions in mm (HxWxL): 187.4 x 197 x 343.3

Frequently Asked Questions


What happens if I try to charge the Li-G4 100Ah battery when temperatures drop below freezing?
The integrated Battery Management System prevents charging when internal temperature falls below 0 degrees Celsius to protect the cells from lithium plating damage. The BMS allows discharge operations down to minus 20 degrees Celsius, so you retain power for appliances even when charging stops. When temperatures drop to freezing, the LED indicator bar displays solid red to show the battery remains active but too cold for charging. Once ambient temperature rises above zero and the battery warms naturally, normal charging resumes automatically. For winter camping where temperatures stay below freezing for extended periods, you need to warm the battery location first or position the battery inside heated living space rather than exterior lockers.
Why must the Li-G4 be charged every six months during storage?
LiFePO4 batteries self-discharge at approximately two percent per month even when switched off and stored correctly. Over six months without charging, voltage drops enough to risk triggering under-voltage protection at 2.50 volts per cell. Once the battery enters deep protection mode from excessive self-discharge, revival becomes difficult and permanent capacity loss occurs. The manual explicitly states units must receive charging every six months when not in use. For proper storage between seasons, charge the battery to full capacity, disconnect it from all systems, and store at temperatures between zero and 35 degrees Celsius. Set a calendar reminder to check and recharge at the five-month mark to maintain the battery within safe voltage parameters and preserve the 2800-plus cycle lifespan.
How does the Li-G4 connect to Clayton Power LPS II systems for capacity extension?
The Li-G4 requires a Clayton Power DC-DC converter positioned between the battery and LPS II to control power transfer rates and protect both units. The standard CD1804 converter allows 45 amp transfer, whilst the CD2402 model increases this to 90 amps for heavy continuous loads. Connection uses 16mm squared cable with 60 amp fuses for the CD1804 setup, or 35mm squared cable with 125 amp fuses for the CD2402 configuration. The supplied AL2401 communication cable links CAN bus data and control signals between devices. Once connected, access the LPS II main menu, navigate to General then System Configuration, and select Capacity Extension to activate the feature. The LPS II automatically detects the connected Li-G4 and displays combined system runtime on its screen. The LPS II prioritises keeping its internal battery charged first, only directing power to charge the Li-G4 when internal capacity exceeds safe thresholds.
What do the LED error codes mean when the battery stops working?
The five-LED state of charge indicator flashes red to signal faults, with the number of flashes identifying specific problems. Two flashes indicate temperature outside the minus 30 to plus 65 degree operating range - move the battery to moderate temperature and allow 30 minutes to stabilise. Three flashes mean overload, short circuit or precharge failure - disconnect all loads, check wiring for shorts or damaged equipment, then restart the battery. Four flashes show the M12 connector overload or short circuit - remove the connector and inspect for physical damage. Five flashes indicate blown internal fuse or switch failure requiring professional service from your retailer. Six flashes cover other internal faults also requiring retailer contact. Most errors clear by switching the battery off for 30 seconds then back on, except hardware failures flagged by five or six flashes. The manual error list on page 11 provides the complete troubleshooting reference with solutions.
What size cables and fuses does the Li-G4 100Ah require for safe installation?
Minimum 16mm squared high-flex cable (Class 5 or 6 flexibility rating) connects the M8 terminals to handle the 175 amp continuous discharge current. Position a 60 amp slow-blow fuse as close as possible to the positive terminal before any other connections - the manual makes this fuse mandatory despite the internal 400 amp protection. For standalone operation with DC-DC converter charging from vehicle alternator, maintain 16mm squared throughout with 60 amp fusing at each power source. When using with G3 Combi inverter systems requiring 200 amp capacity, upgrade to 70mm squared cable with 200 amp fuses between battery and Combi unit. Earth cable sizing must match positive cable specification - undersized grounding creates fire risk from resistance heating. Terminal torque settings matter too: tighten M8 main terminals to 12 Newton-metres and the M4 wake-up terminal to 2.5 Newton-metres using calibrated tools. Wrong cable gauge or loose connections cause overheating leading to insulation failure and potential short circuits.
Does the Li-G4 work with standard alternator charging or does it need special equipment?
Direct alternator connection damages both the Li-G4 and vehicle electrical system due to voltage mismatches and uncontrolled charging current. The Li-G4 requires a Clayton Power DC-DC converter (model CD1804 for standalone use, CD1803 for G3 Combi systems) between the vehicle starter battery and Li-G4 leisure battery. This converter prevents draining the starter battery when the engine stops, manages the 14.4 volt charging profile specific to LiFePO4 chemistry, and limits current to the safe 100 amp maximum. Connect the converter wake-up input to ignition feed (D-plus or key-switch position 15) so charging only occurs when the engine runs. The converter handles voltage differences between the nominal 12.8 volt Li-G4 and 12 volt vehicle systems, whilst the BMS inside the Li-G4 monitors individual cell voltages and temperature to cut charging if parameters exceed safe limits. Without this converter, alternator voltage fluctuations risk triggering over-voltage protection at 3.65 volts per cell.
How many charge cycles does the Li-G4 100Ah provide before capacity drops?
The 100Ah model achieves over 2800 cycles at 80 percent depth of discharge before capacity falls to 60 percent of original rating. This specification uses realistic test conditions of 0.75C charge rate and 1.75C discharge rate, representing 75 amp charging and 175 amp loads. The 280Ah variant lasts over 2800 cycles to 70 percent capacity using gentler 0.3C charge and 0.5C discharge rates. One complete cycle means full discharge from 100 percent to 20 percent state of charge, then recharge back to 100 percent. Partial cycles where you use only 40 percent of capacity count as 0.4 cycles toward the total. Running the battery at 50 to 90 percent state of charge rather than full depth cycling extends lifespan beyond the 2800 specification. Temperature affects cycle life significantly - operation at 40 degrees Celsius halves lifespan compared to 20 degree conditions. The BMS passive balancing system maintains cell voltage equality throughout the cycle life to prevent premature capacity fade from individual cell degradation.
What protection does the Battery Management System provide?
The BMS monitors all four cells individually for voltage, temperature and current to disconnect power when limits are exceeded. Over-voltage protection triggers at 3.65 volts per cell and releases at 3.55 volts. Under-voltage protection activates at 2.50 volts per cell, with release at 2.80 volts after the cells recover. Temperature monitoring cuts power above 65 degrees Celsius or below minus 30 degrees Celsius for discharge, whilst charging stops below zero degrees. Charge current protection trips above 100 amps and discharge protection activates beyond 175 amps continuous or 400 amps for one minute duration. The BMS includes passive cell balancing at one amp to equalise voltage across all four cells during charging, preventing capacity loss from cell mismatch. This balancing occurs automatically without user intervention. The protection system resets automatically when conditions return to normal ranges - you simply switch the battery off for 30 seconds then back on to clear most error states after resolving the underlying cause.
Why does the manual prohibit mounting the Li-G4 on its side or upside down?
The Li-G4 contains a pressure relief valve on the rear panel positioned to vent safely when the battery sits upright on its rubber feet. Incorrect orientation prevents this valve from functioning properly during over-pressure events caused by internal faults. The metal enclosure design and internal component layout assume vertical mounting with terminals facing upward for optimal cooling airflow across the passive heatsink sections. Side or inverted mounting causes uneven temperature distribution between the four cells, making some cells hotter than others and triggering thermal protection prematurely. The supplied mounting brackets attach to designated points on the sides and base, engineered to support the 12 kilogram weight only when mounted correctly. Installation instructions on page seven show proper orientation with the control button and LED display facing forward. Transport regulations UN3480 for lithium batteries also specify upright positioning during movement. Warranty coverage excludes damage from improper mounting orientation.
What is the M4 wake-up terminal used for?
The M4 terminal provides remote on-off control for the battery output without accessing the front panel button. Apply voltage above four volts to this terminal and the battery switches on automatically. Drop voltage below three volts and the battery switches off. This function connects to ignition circuits in vehicle installations, allowing the leisure battery to activate only when the engine runs or when you turn the key to accessories position. In fixed installations, wire this terminal to a dashboard switch for convenient control from the driving position. The terminal accepts up to 60 volts input and isolates electrically from the main DC terminals, so connecting it to vehicle 12 volt circuits presents no risk of backfeed. Some installers connect this to solar charge controller load outputs to wake the battery when sunlight detection begins. The wake-up circuit draws minimal current and does not affect the battery state when voltage sits between three and four volts - the battery simply remains in whatever state it was before, either on or off.
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If you’ve changed your mind about keeping your purchase, please return it in its original condition with proof of purchase and we’ll exchange or refund it. Unless faulty, this should be within 100 days of receiving your order. By original condition, we’d expect this to mean that you’ve kept packaging and labels, and that the item is undamaged and unused.

For further information of how to return your item, please visit the "Returning an Unwanted/Faulty/Damaged Item" section on our Help Page.
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