InSight Series® 12V

12V 120Ah
Deep Cycle Lithium Battery

InSight Series® 12V

12V 120Ah
Deep Cycle Lithium Battery

Offering higher peak discharge and outputting 120A continuous, the InSight 12V LiFePO4 battery was built specifically to meet the power and energy requirements in RV and Marine deep-cycle applications. Delivering unmatched performance with its higher continuous capabilities, you can run multiple appliances at the same time with just one battery.



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Easy Installation

InSight batteries come in BCI group size GC2/GC8 allowing for easy installation without modifying trays or battery compartments.

Scalable System

InSight batteries offer freedom and flexibility by utilizing parallel connections, so you can scale your system to provide increased power and energy (up to 300Ah) as needed.

Super Smart BMS

The robust Battery Management System features a combined total of 48 charge and discharge MOFSETs that control current flow in and out of the battery, along with multilayer protective devices that prevent over/under voltage, current and temperature conditions. The multilayer protection allows InSight batteries to pass stringent UL safety standards.

Intelligent Cooling

InSight Series® uses a carefully engineered cooling management system to quickly remove heat from inside the battery during conditions of high discharge and recharge currents. This prevents overheating of critical components and extends the life of the battery.

Robust Communication

CANbus connections allow batteries to communicate real-time operating statistics like the voltage, current, state of charge and state of health, making InSight batteries more user friendly. Plus, all batteries feature a sleep and pulse recovery operation mode to conserve power.




Nominal Voltage 12.8V
Cell Chemistry LiFePO4
Cell Type Prismatic
Ampere-hour Capacity 120Ah
Watthour Capacity 1536Wh
Specific Energy 128Wh/kg
Impedance (50% SOC, 1kHz) <100mΩ
Cycles @ 80% DOD >3500
Parallel Capable Yes (up to 10)
Series Capable No


BCI Size GC2 / GC8
Dimensions (LxDxH) 260x180x276mm (10.2 x 7.1 x 10.9 in)
Weight 15.6 kg (34.4 lbs)
Case Material ABS
Stud / Insert Terminal M8 X 1.25 - 20
Ingress Protection Marking IP67
Case Flame Rating UL94 V-0


Recommended Continuous Discharge Current 120A (1C)
Maximum Continuous Discharge Current 200A
Peak Over Current 200A<lbatt<300A, 10s300A<lbatt<360A, 5s360A<lbatt<500A, 2sIbatt>500A, 0.5s
Short-Circuit Protection >500A
Short-Circuit Reset Automatic
Discharge Cut Off Pulse Recovery Operation Automatically above 2.9V/cell (11.6V)
Low Voltage Protection 2.8V/cell (11.2V)~6 months @ 25°C (60°F)
Permanent Off  Voltage 1.8V/cell (7.2V)


Recommended Charging Current 60A (0.5C)
Continuous Charge Current  120A (1C)
Disconnect Charge Current lbatt>120A, 5sIbatt>200A, 0.5s
Peak Charge Voltage 14.3V
Float Voltage 13.5V
Over-Voltage Protection 3.65V/cell 4s (14.6V)
Over-Voltage Reset Automatically at 3.6V/cell (14.4V)


Charge Under Temperature 0°C (32°F) for 2s. Self-reset function.
Charge Over Temperature 55°C (131°F) for 2s. Self-reset function.
Discharge Under Temperature -20°C (-4°F) for 2s. Self-reset function.
Discharge Over Temperature 55°C (131°F) for 2s. Self-reset function.
Operating Humidity Range 10% to 95% RH non-condensing
Optimal Storage Temperature 10°C to 35°C (50°F to 95°F)
Optimal Storage Humidity 15% to 90% RH


UL1973 pending (Battery Pack)
CE (Battery Pack)
IEC 62133-2 :2017 (Lithium Batteries)


UN 3480, Class 9


Lithium 12 V Discharge Temps graph
Lithium 12 V Discharge Rates graph
Lithium 12 V Charge Temps graph
Lithium 12 V Charge Soc graph


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Frequently Asked Questions

Can InSight batteries be connected in parallel or series?
RELiON’s InSight batteries were designed exclusively to run in parallel. For starters, each InSight 12V battery is 12 volts. Up to 10 Insight batteries can be connected in parallel. Because they are in parallel, if any one battery goes offline, you will not notice any difference in performance, only duration. A parallel connection extends the reliability of each individual Insight battery to the entire array, giving you more power, more capacity, and less to worry
How can I determine the state of charge (SOC) of my InSight battery?
We recommend using a shunt-based fuel gauge to measure SOC with the InSight Battery. This type of fuel gauge accurately measures the discharge/recharge currents and calculates the Ampere-hours (Ah) flowing in and out of the battery. The LEDs on the battery will also indicate the SOC: 95% - 100% Solid Green Solid Green 75% - 95% Solid Green Flashing Green (every ½ sec.) 50% - 75% Solid Green Solid Yellow 30% - 50% Solid Green Flashing Yellow (every ½ sec.) 10% - 30% Solid Green Solid Red 0 - 10% Solid Green Flashing Red (every ½ sec.)
How do I charge InSight batteries?
It is best to use/select a Lithium, AGM or GEL charge profile in that order of availability. Consult your manual or charger manufacturer for directions on this capability. Spot check the battery SOC LED indicators with a quick press and release of the battery Power Button. Chargers typically display a solid Green Light when the charge is completed, and a flashing green light when the battery is near the end of charge (will vary by charger). Both conditions may or may not occur depending on your charger design. Neither condition is necessarily required to properly achieve a full recharge.
Is there a way to turn the batteries on and off without accessing the battery compartment?
The InSight Series Remote Button gives you the convenience to power on and off your InSight Series batteries without having to access the battery compartment. This high-quality plug-and-play accessory saves you time and energy.

The InSight 12V Is Great For Powering

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Renewable Energy

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The Many Applications of InSight Series® Lithium Batteries

From RVs and cabin cruisers, to pallet jacks and floor scrubbers, learn which InSight Series battery is right for your application.

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