Epoch 12V 172Ah Dual Purpose Essential Series 12172A-DP | Cranking & Deep Cycle LiFePO4 Battery (2.20kWh) | Bluetooth, IP65, Group 31

The Epoch 12V 172Ah Dual Purpose Essential Series combines outboard starting power and deep-cycle house energy in one compact BCI Group 31 LiFePO4 battery. It stores 2.20kWh, so boaters can replace separate starting and house batteries with a single 40 lb unit.

A cranking-capable BMS delivers a 1,000A pulse for up to 5 seconds (approx. 1,000 CCA equivalent), while 200A continuous output runs electronics, pumps and lighting. Bluetooth monitoring, an IP65 dust-tight, water-jet-resistant enclosure and a 4,000+ cycle rating are backed by an 11-year manufacturer warranty, for anglers and boaters who want fewer batteries, less weight and more confidence on the water.

Key Features

• 12V 172Ah dual-purpose LiFePO4 (2.20kWh): A 12.8V nominal, 172Ah Essential Series battery that combines engine cranking and deep-cycle house power in one BCI Group 31 case and stores 2.20kWh (2,202Wh, nominal). It is not a drop-in replacement for every lead-acid installation: check tray fit, terminal clearance, cable size, overcurrent protection, charger profile, and engine and alternator compatibility first.
• Cranking power (approx. 1,000 CCA equivalent): 1,000A for up to 5 seconds, for engine cranking only. Epoch's compatibility target is outboards up to 250 hp when the engine's battery requirements, alternator output, wiring and charging profile match.
• 200A continuous for house loads: 200A maximum continuous discharge for fish finders, GPS, radios, livewell and bilge pumps, lighting and other 12V loads. Keep every load that lasts longer than 5 seconds at or below 200A, and keep enough charge in reserve to start the engine.
• 200A charging: 200A maximum continuous charge current from all sources combined (86A recommended) at 14.2V-14.6V bulk/absorption. Program every charger, inverter charger, solar controller and DC-to-DC charger for LiFePO4, and use a DC-to-DC charger or lithium-ready regulation where the alternator needs it.
• No internal heating: Rated to charge from -5°C to 55°C (23°F to 131°F), but program chargers to charge only between 0°C and 55°C (32°F and 131°F). The BMS blocks charging when the battery is too cold, and it can still discharge down to -20°C (-4°F).
• Bluetooth monitoring: The free Epoch Li-Ion app (iOS and Android) shows state of charge, voltage, current, temperature and BMS status.
• Advanced BMS protection: Protects against overcharge, over-discharge, over-current, short circuit, and high and low temperature. Install a DC-rated fuse or breaker as close as practical to the positive terminal, sized for engine cranking current as well as house loads.
• IP65 rated: Dust-tight and protected against low-pressure water jets. Not submersible: do not submerge or pressure-wash it, or install it where standing water can collect, such as a bilge.
• Group 31 footprint: 12.91 x 6.22 x 8.46 in (328 x 158 x 215 mm) and 40 lb (18.14 kg), with M8 female terminals torqued to 8-12 Nm (71-106 in-lb).
• Parallel only: Up to 4 matched 12172A-DP batteries in parallel (688Ah, 8.81kWh at 12.8V). Series wiring is not approved for this model.
• 4,000+ cycle life and maintenance-free: No watering, acid service or lead-acid equalization; routine inspections keep it safe. 4,000+ cycles is over 10 years at one full cycle a day, rated at the depth of discharge, charge rate and temperature stated on the datasheet, to its end-of-life capacity.
• 11-year manufacturer warranty: Register within 90 days of purchase for full warranty coverage.

Key Benefits

• Dual purpose design: Cranking + deep-cycle power
• Approx. 1,000 CCA: Outboard starting support
• Bluetooth monitoring: iOS and Android app visibility
• IP65 protection: Dust and water-jet resistance
• 4,000+ cycles: Long-cycle LiFePO4 chemistry
• 11-year warranty: Manufacturer coverage
• LiFePO4 thermal stability: Far lower thermal-runaway risk than other lithium chemistries; the BMS adds over-temperature and low-temperature charge protection

At a glance

Marine cranking, house power, Bluetooth, Group 31.

• 172Ah: Capacity
• 2.20kWh: Stored energy
• 1,000A: 5-sec cranking pulse
• 200A: Continuous output
• 40 lb: Battery weight
• IP65: Marine enclosure

The all-in-one boat battery: core features

Replace separate starting and house batteries with one cranking-capable, deep-cycle Group 31 lithium battery.

• Cranking power: approx. 1,000 CCA equivalent: A heavy-duty cranking BMS delivers 1,000A for up to 5 seconds, for engine cranking only, giving compatible outboard starting systems the burst current they need without a separate lead-acid starting battery.
• Deep-cycle house power with 200A continuous output: This 2.20kWh marine lithium battery also supports long-running 12V loads including fish finders, livewell pumps, bilge pumps, lighting, radios, GPS units, stereos and other onboard electronics.
• Drop the dead weight at only 40 lb: Replace heavy lead-acid starting and house batteries with one 40 lb Group 31 lithium battery to reduce boat weight, improve service access and free up crowded battery compartments.

Built to survive demanding marine environments

Group 31 fitment, IP65 protection and Bluetooth visibility for boaters who need dependable power.

• BCI Group 31 footprint: The compact case measures 12.91 in L x 6.22 in W x 8.46 in H (328 x 158 x 215 mm) on a BCI Group 31 footprint, for compatible marine trays, hatches and center-console compartments. It is not a drop-in replacement for every lead-acid installation: check tray fit, terminal clearance, cable size, overcurrent protection and the charger profile first.
• IP65 dust-tight, water-jet resistant: The IP65 enclosure is dust-tight and protects the internal cells and smart BMS against low-pressure water jets from any direction in marine battery hatches and boat compartments. It is not submersible: do not submerge or pressure-wash it, or install it where standing water can collect, such as a bilge.
• Bluetooth smart app monitoring: Use the Epoch Li-Ion app to check state of charge, voltage, current, temperature and BMS status from your phone, so you can see how much power remains before you run back to the ramp.

Expandability and 11-year reliability

Build a larger 12V house bank without moving away from the cranking-capable dual-purpose platform.

• Expand your 12V house bank up to 4 in parallel: Wire up to 4 matched batteries in parallel for a 12V 688Ah / 8.81kWh bank. Series wiring is not approved for this model unless Epoch provides written model-specific guidance.
• 4,000+ cycles and 11-year warranty: LiFePO4 chemistry provides long service life, stable voltage, fast charging capability and maintenance-free operation, backed by Epoch's 11-year manufacturer warranty (register within 90 days of purchase).
• Smart BMS protection: The built-in BMS helps protect against overcharge, over-discharge, over-current, short circuit, high temperature, low temperature and low-temperature charging conditions.

IP65 marine protection

Dust-tight. Water-jet resistant. Not submersible.

The IP65-rated enclosure is dust-tight and protected against low-pressure water jets from any direction. It is suitable for many marine battery hatches and center-console installations, but it should not be submerged, pressure-washed, or installed where standing water can collect around the battery.

Why upgrade to dual-purpose lithium

Start the engine, run the electronics, and remove unnecessary lead-acid weight.

This dual-purpose LiFePO4 battery lets boaters consolidate cranking and deep-cycle power into a lighter, smarter, maintenance-free lithium platform. Compared with traditional lead-acid setups, it reduces watering, corrosion maintenance, wasted compartment space and voltage sag under long accessory loads.

Fitment, charging and installation note

Verify your exact boat, charger, alternator and electrical system before installation.

Confirm Group 31 tray dimensions, lid clearance, hold-down method, terminal hardware, cable routing, fuse/breaker ratings, charger programming and outboard alternator compatibility before installation. Mount the battery upright, and place a DC-rated main fuse or breaker as close as practical to the positive terminal, sized for engine cranking current as well as house loads. Use LiFePO4-compatible charging settings and follow Epoch's current manual, applicable marine codes and qualified installer guidance for final wiring.

Expandability

• Parallel only: up to 4 matched 12172A-DP batteries (688Ah, 8.81kWh at 12.8V)
• Series wiring is not approved for this model unless Epoch provides written model-specific guidance

Dimensions and weight

• Length: 12.91 in
• Width: 6.22 in
• Height: 8.46 in
• Weight: 40 lb
• BCI Group 31 footprint. Verify tray dimensions, terminals, wiring and charging-system compatibility before installation.

Suitable For:

• Marine cranking and starting applications where the outboard requirements match
• Outboards up to 250 hp (Epoch's compatibility target) when the engine's battery requirements, alternator output, wiring and charging profile match
• All-in-one boat battery setups that combine starting power and house electronics
• Bass boats, fishing boats, pontoons, skiffs, flats boats and center-console systems
• Fish finders, livewell pumps, bilge pumps, GPS, marine radios, lighting and onboard electronics
• Group 31 AGM or lead-acid replacement projects where fitment and charging profile match
• 12V marine house banks up to 688Ah using up to 4 matched batteries in parallel
• RV, camper, van, overland and solar 12V deep-cycle systems where cranking capability is also useful
• Solar battery banks and inverter systems
• Cabins and backup power

Certifications & Standards

• IP65: Dust-tight and protected against water jets from any direction; under IEC 60529 the first digit rates solids and the second rates water (sealed against dust and dirt, rain, spray and hose-down, outdoor and marine mounting).
• UL 1642: The UL standard for lithium cells: each cell design is tested for fire and explosion risk under abuse (short-circuit and overcharge, crush, impact and shock, heating and temperature cycling) before it is built into a pack.
• UL 9540A: A UL test method that measures how a cell behaves if it goes into thermal runaway and whether fire can spread to its neighbours, with heat and gas release measured; the data is used to design safer energy storage systems.
• IEC 62619: The international safety standard for rechargeable lithium cells and batteries in industrial use, including stationary energy storage, covering electrical and mechanical abuse, thermal runaway propagation and battery management functional safety.
• CE: The manufacturer's declaration that the product meets the European Union's health, safety and environmental requirements (safety directives, electromagnetic compatibility, environmental requirements), required to sell it in the European Economic Area.
• RoHS: Complies with the EU Restriction of Hazardous Substances directive (2011/65/EU), which limits lead, mercury, cadmium, restricted flame retardants, phthalates and other toxic materials in electronics.
• UN 38.3: The United Nations test series (altitude, thermal, vibration, shock, external short-circuit, impact, overcharge and forced discharge) every lithium battery must pass before it can be shipped by air, sea or road.

Please Note: 1,000A is for engine cranking only, up to 5 seconds; keep loads lasting longer than 5 seconds at or below 200A.

Please Note: Keep enough charge in reserve to start the engine.

Please Note: No internal heating: rated to charge from -5°C, but program chargers for 0°C to 55°C; the BMS blocks charging when too cold.

Please Note: Series wiring is not approved; do not build 24V, 36V or 48V systems with this model.

Please Note: IP65 is not submersible: do not install in a bilge or where standing water collects, and do not pressure-wash.

Please Note: Verify the outboard maker's CCA, charging profile and alternator compatibility before replacing a starting battery.

Please Note: Install a DC-rated fuse or breaker close to the positive terminal, sized for cranking current as well as house loads.