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Epoch Batteries 12V 100Ah (1.28kWh) Eco Series LiFePO4 Battery - Off Grid Stores
by Epoch Batteries

Epoch Batteries 12V 100Ah (1.28kWh) Eco Series LiFePO4 Battery

SKU: 12100-ECO
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$325.00 - $325.00
$325.00
$325.00 - $325.00
$325.00
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Off Grid Stores is an authorized retailer of Epoch Batteries products. Because of this, we pass on Epoch Batteries's manufacturer warranty to you.

Product Highlights
  • 12V 100Ah Eco Series LiFePO4 (1.28kWh): A 12.8V nominal, 100Ah deep-cycle battery that stores 1.28kWh (1,280Wh, nominal) in a BCI Group 24 case, for RV, marine house power, solar, trolling motor and backup systems. It is a Group 24 drop-in for many installations, but not a drop-in replacement for every lead-acid one: check tray fit, terminal clearance, cable size, overcurrent protection and charger profile first.
  • Group 24 Size, 21 lb: 10¼ × 6¾ × 9 in (260 × 171 × 229 mm) and 21 lb (9.5kg). It fits standard Group 24 trays and boxes, and Epoch sells a matching tray for the 12105A-H and 12100-ECO.
  • 100A Continuous Output: 100A maximum continuous discharge and 300A for up to 5 seconds, for start-up surges only; keep the combined continuous load at or below 100A (about 1,280W of inverter DC input). Deep-cycle only: not cranking-rated, so not for engine starting.
  • Charging: 100A maximum continuous charge current from all sources combined, up to 50A recommended, and 14.2V-14.4V bulk/absorption. Use a 12V LiFePO4 charge profile, such as the Epoch 12V 15A Lithium Battery Charger; a smaller charger simply takes longer.
  • Low-Temperature Charge Protection: No internal heating. The BMS blocks charging below 0°C (32°F) to protect the cells, and the battery can still discharge down to -20°C (-4°F). Charge only between 0°C and 55°C (32°F to 131°F).
  • Smart BMS (20+ Safety Features): Protects against overcharge, over-discharge, over-current, short circuit, and high and low temperature, with a high-temperature reconnect at 50°C (122°F). It does not replace a correctly sized fuse or DC-rated breaker near the positive terminal.
  • No Bluetooth: Monitor it with an external shunt-based battery monitor or system display; voltage alone is not a precise state-of-charge reading on LiFePO4.
  • IP54 Rated: Dust-protected and splash-resistant for everyday mobile, RV, marine and outdoor use. Not waterproof or submersible: do not submerge or pressure-wash it, or install it where standing water can collect.
  • Expandable: Up to 4 matched 12100-ECO batteries in series (24V, 36V or 48V system classes) and up to 16 in parallel (1,600Ah, 20.48kWh at 12V); the largest bank is 4S16P (64 batteries: 51.2V, 1,600Ah, 81.92kWh).
  • 4,500+ Cycle Life & Low Maintenance: No watering, acid service or routine lead-acid maintenance; routine inspections and terminal checks (8-12 Nm) keep it safe.
  • 6-Year Limited Warranty: 3 years of free replacement, then 40% off MSRP on a replacement battery through Year 6. Register within 90 days or keep your proof of purchase to confirm your coverage start date.
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Epoch Batteries 12V 100Ah (1.28kWh) Eco Series LiFePO4 Battery

Epoch Batteries 12V 100Ah (1.28kWh) Eco Series LiFePO4 Battery

Eco Series Group 24 lithium upgrade

Epoch 12V 100Ah Eco Series LiFePO4 Battery | Group 24 Drop-In

The Epoch 12V 100Ah Eco Series is a value-focused Group 24 lithium battery and 12V 100Ah LiFePO4 battery built for RV, marine, solar, trolling motor, and backup power upgrades.

Replace heavy, high-maintenance lead-acid batteries with a 21-lb lithium battery that stores 1.28kWh of deep-cycle energy (nominal, at 12.8V), with smart BMS protection, low-temperature charge protection, IP54 splash-resistant durability, 4,500+ cycle life, and an 11-year limited warranty. It has no Bluetooth or internal heating, which keeps the price down.

100Ah
Capacity
1.28kWh
Stored energy
21 lb
Lightweight
IP54
Splash resistant

Built for dependable everyday power

11-year limited warranty3 yrs free replacement
4,500+ cyclesLong service life
Smart BMS20+ safety features
Low-temp cutoffCharge protection
Group 24 fitDrop-in replacement size
Maintenance-freeNo watering or acid

The Perfect Drop-In Upgrade: Core Features

A practical 12V lithium upgrade for RV, marine, and off-grid owners who want less weight, less maintenance, and better usable energy.

True Group 24 Sizing

This Group 24 drop-in measures 10¼ in L × 6¾ in W × 9 in H (260 × 171 × 229 mm) and fits standard Group 24 trays and battery boxes. It is not a drop-in replacement for every lead-acid installation: check tray fit, lid clearance, terminal clearance, cable size, overcurrent protection, and charger profile before you install it.

Ultra-Lightweight: Just 21 lbs

This 21-lb (9.5 kg) lithium battery is far easier to lift and install than a comparable lead-acid battery. Reducing battery weight can improve trailer tongue weight, boat balance, and general serviceability.

Smart BMS with Low-Temp Cutoff

The built-in smart BMS lithium battery system includes 20+ safety features and low-temp cutoff lithium charge protection that blocks charging below 0°C (32°F) to help prevent cell damage. There is no internal heater, so charge only between 0°C and 55°C (32°F and 131°F).

IP54 Splash & Dust Resistance

The IP54 enclosure is dust-protected and splash-resistant for many everyday mobile, RV, marine, and outdoor installations. It is not waterproof and not designed for submersion, pressure washing, bilge flooding, or continuous water exposure.

Popular 12V Eco Series Applications

Affordable 12V solar battery, Group 24 RV battery upgrade, lightweight marine house battery, and 12V trolling motor lithium battery applications.

✓ RV and camper house powerRun lights, fans, controls, refrigerators, and auxiliary 12V loads with a cleaner Group 24 RV battery upgrade.
✓ Solar and off-grid storageUse as an affordable 12V solar battery for cabins, trailers, small systems, and backup energy storage.
✓ Marine house batteryPower fish finders, navigation, radios, pumps, lighting, and accessories with a lightweight marine house battery.
✓ Trolling motor supportSuitable for 12V trolling motors whose maximum current draw is at or below 100A continuous, with the wiring, fuse, controller, and charger within the battery ratings.
✓ Higher-voltage systemsConnect matched batteries in series for 24V, 36V, or 48V-class systems following Epoch wiring guidance.
✓ Expanded capacity banksParallel up to 16 matched batteries for larger 12V storage banks with proper fusing, busbars, and cable sizing.

Reliable Power & Deep Scalability

Eco Series value with real deep-cycle output and scalable lithium storage.

Connect Up to 4 in Series or 16 in Parallel

DIYers can build 24V, 36V, or 48V-class systems with up to 4 batteries in series, or increase 12V amp-hour capacity with up to 16 batteries in parallel for up to 20.48kWh.

100A Continuous Discharge (300A Peak)

The 100A continuous discharge rating supports everyday 12V loads and inverters whose DC input current stays within 100A (about 1,280W of DC input at 12.8V; usable AC output is lower). The 300A rating covers start-up surges of up to 5 seconds only; any load that lasts longer must stay at or below 100A.

4,500+ Cycles & 11-Year Limited Warranty

Eco means accessible, not disposable. LiFePO4 chemistry delivers long cycle life, flat voltage output, fast charging capability, and maintenance-free operation compared with traditional lead-acid batteries.

Deep-cycle battery notice

This Eco Series model is designed for deep-cycle storage and auxiliary power. It is not a cranking battery and has no Bluetooth or internal heating. Keep continuous loads at or below 100A; 300A is a 5-second peak only. Do not charge it below 0°C (32°F). For engine starting, use a cranking-rated lithium battery or confirm compatibility directly with Epoch before installation.

Compatible chargers and accessories

✓Epoch 12V 15A Lithium Battery Charger
✓Battery tray for Epoch 12105A-H and 12100-ECO models
✓Power distribution blocks

Charging and installation note

Use LiFePO4-compatible charging equipment and verify fitment before installation.

Program chargers, converter chargers, inverter chargers, MPPT solar controllers, and DC-to-DC chargers within Epoch’s recommended lithium charging parameters (14.2V–14.4V bulk/absorption, up to 50A recommended, 100A maximum from all sources combined). Disable equalization and temperature compensation, and charge only between 0°C and 55°C (32°F and 131°F). Mount the battery upright unless Epoch documentation for this model allows otherwise, torque the M8 terminals to 8–12 Nm (71–106 in-lb), and install a DC-rated fuse or breaker as close as practical to the positive terminal. For series or parallel banks, use matched batteries, fully charge each one before connecting it, and use balanced wiring, properly sized cables, fuses or breakers, and system-level disconnects.

Specifications:

Epoch Batteries 12V 100Ah (1.28kWh) Eco Series LiFePO4 Battery
ELECTRICAL & SYSTEM
Model 12100-ECO
Series Eco Series
Battery type Deep cycle
Chemistry LiFePO4
Cell configuration 4S1P
Nominal voltage 12.8 V
Capacity 100 Ah
Stored energy 1.28 kWh (1,280 Wh)
Operating range 10.0–14.6 V
Max. charge voltage 14.6 V
Cycle life 4,500+ cycles
Bluetooth No
Self-heating No
DISCHARGE & RUNTIME
Max. continuous discharge 100 A
Peak discharge 300 A for 5 s
Series / parallel Max. 4S (48V class) / 16P
100 W / 500 W load ≈ 10.2 h / ≈ 2.0 h
CHARGE SETTINGS
Max. continuous charge 100 A
Recommended charge Up to 50 A (50%)
Bulk / absorption 14.2–14.4 V
Absorption time ≤ C/20 (5 A) or 15 min
Float 13.3–13.6 V (off preferred)
Re-bulk 13.2 V
Equalization Disabled
Temp. compensation 0 mV/°C (disabled)
BMS high-V cutoff 14.6 V
SOC recalibration 14.6 V
TEMPERATURE
Charge 32 to 131 °F
Discharge −4 to 140 °F
Storage 32 to 95 °F
Low-temp charge Blocked below32 °F
MECHANICAL
Dimensions 10¼ in × 6¾ in × 9 in
Metric 10.24 in × 6.73 in × 9.02 in
Footprint BCI Group 24
Weight 21 lb
Terminals M8 female, 8–12 Nm (71–106 in-lb)
Enclosure IP54, not submersible
BMS PROTECTIONS
Smart BMS Built-in management
Overcharge / overdischarge Protected
Over-current / short circuit Protected
High / low temperature Disconnect protection
COMPLIANCE & SUPPORT
Cell certification UL 1642 (cells)
Thermal runaway testing UL 9540A (cells)
Battery certification IEC 62619:2022
Compliance marks CE, RoHS
Transport UN 38.3, Class 9

Frequently Asked Questions

Will this battery fit in my existing battery box?

In most standard Group 24 trays and boxes, yes. The Epoch 12V 100Ah Eco Series is a Group 24 drop-in measuring 10¼ in L × 6¾ in W × 9 in H (260 × 171 × 229 mm), and Epoch sells a matching battery tray for the 12105A-H and 12100-ECO. It is not a drop-in replacement for every lead-acid installation, so always verify tray dimensions, lid clearance, the hold-down, cable and terminal clearance, cable size, fuse sizing, and charger settings before installation.

Does the Eco Series have built-in heating for winter use?

No. The Eco Series does not include internal heating pads, but it does include low-temperature charge protection. The smart BMS blocks charging below 0°C (32°F) to help protect the lithium cells from damage, and the battery can still discharge power in temperatures as low as -4°F / -20°C. Charge only between 0°C and 55°C (32°F and 131°F): move a cold battery somewhere warmer and let it stabilize before charging, and never bypass the protection.

Can I connect these batteries together to build a 24V or 36V system?

Yes. The 12100-ECO supports up to 4 batteries in series for 24V, 36V, or 48V-class systems and up to 16 batteries in parallel for expanded capacity; the largest bank is 4S16P (64 batteries: 51.2V, 1,600Ah, 81.92kWh). Use matched batteries of the same model, age, capacity, and state of charge, fully charge each one before connecting it, and use charging equipment rated for the full bank voltage, fusing, disconnects, and properly sized cabling.

Can I use this battery to start my boat or vehicle engine?

No. This is a dedicated deep-cycle battery. It is engineered for prolonged, steady power in applications such as RV house systems, trolling motors, solar storage, marine electronics, and auxiliary 12V loads. It is not designed to provide the instantaneous cold-cranking amps required to start gas or diesel engines.

Do I need a special charger for this lithium battery?

Use a charger, converter, inverter charger, solar controller, or DC-to-DC charger with a dedicated LiFePO4 charge profile, such as the Epoch 12V 15A Lithium Battery Charger. Epoch lists 14.2V–14.4V bulk/absorption, ending when the current falls to C/20 (5A) or after 15 minutes, float off (preferred) or 13.3V–13.6V, 13.2V re-bulk, a 14.6V BMS high-voltage cutoff, equalization disabled, and temperature compensation disabled. Charge at up to 50A (recommended) and never more than 100A from all sources combined. Avoid lead-acid chargers with desulfation or equalization modes.

Does this battery have Bluetooth monitoring?

No. The Eco Series does not include Bluetooth or app connectivity. To track state of charge, use an external shunt-based battery monitor or a system display; voltage alone is not a precise state-of-charge reading on LiFePO4. By omitting premium features such as Bluetooth and internal heating, the Eco Series delivers safe LiFePO4 chemistry, smart BMS protection, and 4,500+ cycle life at a more accessible price point. For Bluetooth monitoring, compare Epoch Essential, Pro, or Elite Series options.

How long will this battery last compared to my old lead-acid battery?

The Epoch 12V 100Ah Eco Series is rated for 4,500+ cycles. Depending on usage, charging habits, depth of discharge, temperature, and storage conditions, this LiFePO4 battery can significantly outlast traditional lead-acid batteries while eliminating watering and acid maintenance. Routine inspections and terminal checks still apply.

Product Documents:

Epoch Batteries 12V 100Ah (1.28kWh) Eco Series LiFePO4 Battery User Manual

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Epoch Batteries 12V 100Ah (1.28kWh) Eco Series LiFePO4 Battery Specification Sheet

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