Eco Series Group 24 lithium upgrade
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 a 6-year manufacturer warranty. It has no Bluetooth or internal heating, which keeps the price down.
A practical 12V lithium upgrade for RV, marine, and off-grid owners who want less weight, less maintenance, and better usable energy.
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.
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.
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).
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.
Affordable 12V solar battery, Group 24 RV battery upgrade, lightweight marine house battery, and 12V trolling motor lithium battery applications.
Eco Series value with real deep-cycle output and scalable lithium storage.
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.
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.
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.
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.
Full technical data for the Epoch 12V 100Ah Eco Series LiFePO4 battery.
| General | |
|---|---|
| Brand | Epoch Batteries |
| Model / SKU | 12100-ECO |
| Series | Eco Series |
| Battery type | Deep-cycle LiFePO4 battery |
| Battery group size | BCI Group 24 |
| Chemistry | LiFePO4 / lithium iron phosphate |
| Cell type | Prismatic LiFePO4 |
| Cell configuration | 4S1P |
| Bluetooth | No — use an external battery monitor |
| Self-heating | No |
| Low-temperature charge protection | Yes — charging blocked below 0°C / 32°F |
| Cycle life | 4,500+ cycles |
| Warranty | 6-year manufacturer warranty; register within 90 days of purchase for full coverage |
| Voltage and capacity | |
| Nominal voltage | 12.8V |
| Nominal capacity | 100Ah @ 0.2C |
| Stored energy | 1.28kWh / 1,280Wh (nominal) |
| Runtime planning energy | About 1,024Wh (80% of nominal) |
| Estimated runtime | About 20.5 h at 50W, 10.2 h at 100W, 4.1 h at 250W, 2.0 h at 500W, 1.6 h at 50A (640W) (DC loads at 25°C, new fully charged battery) |
| Operating voltage range | 10.0V – 14.6V |
| Maximum charge voltage | 14.6V |
| Current ratings | |
| Max continuous discharge | 100A |
| Peak discharge | 300A for up to 5 seconds |
| Max continuous charge current | 100A, all charging sources combined |
| Recommended charge current | Up to 50A (0.5C, 50% of capacity) |
| Inverter sizing | Inverter DC input current within 100A (about 1,280W at 12.8V); usable AC output is lower |
| Deep-cycle load warning | Do not design continuous loads above the 100A per-battery continuous limit; 300A is a 5-second peak only |
| Series and parallel configuration | |
| Series connections | Max 4 batteries in series (24V, 36V, or 48V system classes) |
| Parallel connections | Max 16 batteries in parallel |
| Maximum 12V parallel bank | 1,600Ah / 20.48kWh with 16 batteries in parallel |
| Maximum configuration | 4S16P (64 matched batteries): 51.2V nominal, 1,600Ah, 81.92kWh |
| Bank batteries | Matched 12100-ECO batteries of the same age, condition, and state of charge; fully charge each before connecting it into a bank |
| Temperature | |
| Charge temperature range | 0°C to 55°C / 32°F to 131°F |
| Discharge temperature range | -20°C to 60°C / -4°F to 140°F |
| Recommended storage temperature | 0°C to 35°C / 32°F to 95°F |
| Long-term storage | About 50% state of charge or higher, loads disconnected; check and recharge at least every 3 months |
| Low-temperature charge protection | Charging blocked below 0°C / 32°F |
| High-temperature reconnect | 50°C / 122°F |
| Dimensions and weight | |
| Length | 10¼ in (260 mm) |
| Width | 6¾ in (171 mm) |
| Height | 9 in (229 mm) |
| Overall dimensions | 10¼ in L × 6¾ in W × 9 in H (260 × 171 × 229 mm) |
| Footprint | BCI Group 24 |
| Weight | 21 lb / 9.5 kg |
| Mechanical | |
| Terminals | M8 female |
| Terminal torque | 8–12 Nm (71–106 in-lb) |
| Case material | ABS and PC blend, UL94-V0 flame rating |
| IP rating | IP54 per IEC 60529 — dust-protected and splash-resistant; not submersible |
| Mounting orientation | Upright, unless Epoch documentation for this model allows otherwise |
| Recommended charging settings | |
| Charger type | 12V LiFePO4-compatible charger, converter, inverter charger, solar controller, or DC-to-DC charger |
| Compatible charger | Epoch 12V 15A Lithium Battery Charger |
| Maximum continuous charge | 100A, all charging sources combined |
| Recommended charge current | Up to 50A for one battery; up to 50% of bank capacity for multi-battery banks |
| Bulk / absorption voltage | 14.2V – 14.4V |
| Absorption end condition | When charge current falls to C/20 (5A) or after 15 minutes, whichever comes first |
| Float voltage | Disabled preferred, or 13.3V – 13.6V |
| Re-bulk voltage | 13.2V |
| Equalization | Disabled |
| Temperature compensation | 0mV/°C (disabled) |
| BMS high-voltage cutoff | 14.6V |
| SoC recalibration voltage | 14.6V |
| Charge temperature | 0°C to 55°C / 32°F to 131°F |
| Alternator charging | DC-to-DC charger programmed for LiFePO4 |
| BMS protection and compliance | |
| Smart BMS | Built in with 20+ safety features |
| Protection functions | Overcharge, over-discharge, over-current, short-circuit, and high / low temperature disconnects |
| Overcurrent protection | Install a DC-rated fuse or circuit breaker as close as practical to the battery positive terminal; the BMS is not a substitute |
| Monitoring | No Bluetooth; use a shunt-based battery monitor for accurate state of charge |
| Cell certification | UL 1642 (cells) |
| Thermal runaway testing | UL 9540A (cells) |
| Battery certification | IEC 62619:2022 |
| Compliance marks | CE, RoHS |
| Shipping classification | UN 38.3, Class 9 lithium battery shipping classification |
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.
Common questions about Group 24 fitment, charging, Bluetooth, cold-weather protection, and system building.
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.
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.
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.
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.
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.
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.
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.
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