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Essential Series
12V 172Ah Cranking & Deep Cycle (Dual Purpose) LiFePO4 Battery
€794.95
IP65BluetoothStarting & Cranking
Capacity: 172Ah
- 11-year warranty
- US-based support
- Available to ship today
Features at a glance
- IP65Weatherproof
Sealed against dust and driving rain.
- 4,000+Cycle life
Over 10 years at one full cycle a day.
- iOS + AndroidBluetooth app
Charge, voltage and temperature on your phone in the Epoch Li-Ion app.
- Advanced BMSProtection
Guards against overcharge, over-discharge, overcurrent and short circuit.
- LiFePO4Safest chemistry
Stable under extreme conditions. 11-year warranty.
- 2.20kWh Dual-Purpose Powerhouse: Get the best of both worlds. Premium LiFePO4 chemistry engineered to effortlessly handle deep-cycle house loads (172Ah capacity) while also providing the heavy burst of power needed for reliable engine starting.
- Extreme Marine Cranking (1,000 CCA Equivalent): Never get stranded on the water. Specifically designed to replace standard starting batteries, delivering an immense 1,000A starting burst (for up to 5 seconds) to reliably turn over all outboard motors up to 250hp.
- Sustained Deep-Cycle Stamina: Once the engine is running, rely on the robust 200A max continuous discharge to confidently power your trolling motors, fish finders, and heavy onboard electronics all day long without voltage drops.
- Complete Visibility via Bluetooth: Eliminate the guesswork. Monitor your real-time state of charge, voltage, current draw, and overall battery health right from the helm using your smartphone and the free Epoch iOS and Android apps.
- Marine-Grade Durability (IP65 Rated): Built for the harsh realities of boating and the outdoors. The tightly sealed IP65-rated casing ensures your battery is highly protected against dust, dirt, and heavy water spray.
- Advanced Smart BMS Protections: Operate with total peace of mind. The intelligent built-in Battery Management System automatically safeguards your investment against overcharge, over-discharge, over-current, short circuits, and extreme high/low temperatures.
- Built for the Long Haul: Need more deep-cycle capacity? Safely connect up to 4 batteries in parallel. Enjoy a completely maintenance-free solution engineered to deliver an incredible 4,000+ charge cycles, proudly backed by our industry-leading 11-Year Manufacturer Warranty.
Configuration
Cell Configuration: 4S1P
Chemistry: LiFePO4
Current
Ah Capacity: 172Ah
Max Continuous Discharge Amps: 200A
Max Charge Current Amps: 200A
Max Discharge Peak Current Amps: 1,000A @ 5s
Series | Parallel: Max (4) in Parallel
Voltage
Voltage: 12.8V
Max Charge Voltage: 15.0V
Operating Voltage Range: 10.0V - 14.6V
Temperature
Charge Temp Range: −5°C (23°F) / 55°C (131°F)
Discharge Temp Range: -20°C (-4°F) / 60°C (140°F)
Storage Temp: 0°C (32°F) / 35°C (95°F)
Weight: 40 lbs
Dimensions
Length: 12.91 (inches)
Width: 6.22 (inches)
Height: 8.46 (inches)
To properly charge your Epoch Batteries, you will want to verify that any charging component in your system is capable of being programmed for the following specifications. Charging components can include, but are not limited to converters, inverter chargers, solar charge controllers, DC to DC chargers, etc.
Bulk/Absorption: 14.2V – 14.6V
Absorption Time: Two batteries in parallel connections require 30 minutes 200Ah
Float: 13.4V – 13.8V
Equalization: 14.4V/ Disabled
Temperature Compensation: 0/Disabled
Charge Rate: 50% of the battery or battery bank capacity
Battery Charge Temperature Range: 32°F (0°C) to 131°F (55°C)
Battery Discharge Temperature Range: -4°F (-20°C) to 140°F (60°C)
Cell Charge Temperature: 32°F (0°C) to 131°F (55°C)
Cell Discharge Temperature: -4°F (-20°C) to 140°F (60°C)
NOTE: Not all chargers are capable of multistage charging. If yours is not, you will want to verify it can be programmed for the Bulk/Absorption voltage and have the other items mentioned disabled if applicable. Consult your charger's manual or the manufacturer.
Epoch Li-Ion App
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Applications & use cases
- RV house power
- Camper vans and van life
- Travel trailers and fifth wheels
- Motorhomes and Class A or Class C coaches
- Overlanding and expedition vehicles
- Marine house power
- Trolling motors
- Marine electronics and fish finders
- Boat starting and dual-purpose marine power
- Fishing kayaks and small boats
- Yachts and large cruising boats
- Electric outboards and marine propulsion support
- Off-grid solar systems
- Solar battery banks and inverter systems
- Home energy storage and backup power
- Cabins and remote power systems
- Camping and emergency power kits
- Ice fishing and portable sonar
- Ham radio and communications backup
- Commercial fleet and specialty power systems
Marine cranking · House power · Bluetooth · Group 31
12V 172Ah Marine Cranking Lithium Battery | Epoch Dual Purpose
Upgrade your boat with a 12V 172Ah marine cranking lithium battery that combines outboard starting power and deep-cycle house energy in one compact Group 31 LiFePO4 platform.
The Epoch Dual Purpose LiFePO4 battery delivers 2.20kWh of marine lithium battery storage, a 1,000A 5-second cranking pulse, 200A continuous output, Bluetooth monitoring, IP65 water-resistant protection, and a lightweight 40-lb design for anglers and boaters who want fewer batteries, less weight, and more confidence on the water.
172Ah
Capacity
2.20kWh
Stored energy
1,000A
5-sec cranking pulse
200A
Continuous output
40 lb
Battery weight
IP65
Marine enclosure
Built to go further
Dual purpose designCranking + deep-cycle power
Approx. 1,000 CCAOutboard starting support
Bluetooth monitoringiOS and Android app visibility
IP65 protectionDust and water-jet resistance
4,000+ cyclesLong-cycle LiFePO4 chemistry
11-year warrantyManufacturer coverage
The Ultimate 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 up to 1,000A peak discharge for 5 seconds, giving compatible outboard starting systems the burst current they need without using 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 lbs
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.
Exact fit: true Group 31 sizing
The compact case measures 12.91 in L × 6.22 in W × 8.46 in H, making it a strong Group 31 cranking battery replacement for compatible marine trays, hatches, and center-console compartments.
IP65 weather and water resistance
The IP65 enclosure helps protect the internal cells and smart BMS from dust, spray, and low-pressure water jets common in damp bilge areas, marine battery hatches, and wet boat compartments.
Bluetooth smart app monitoring
Use the Epoch Li-Ion app to check battery 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 & 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 / 8.80kWh 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.
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.
Built for Marine Anglers, Boaters & 12V Power Systems
An all-in-one boat battery for cranking, electronics, and deep-cycle marine runtime.
- ✓Marine cranking and starting applications where the outboard requirements match.
- ✓Compatible outboard motors up to 250 hp when engine, alternator, and charging specs are approved.
- ✓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 matched batteries in parallel.
- ✓RV, camper, van, and solar 12V deep-cycle systems where cranking capability is also useful.
Technical Specifications
Clean reference specs for the Epoch 12V 172Ah Essential Series dual-purpose marine lithium battery.
| General | |
|---|---|
| Brand | Epoch Batteries |
| Model / SKU | 12172A-DP |
| Series | Essential Series |
| Battery type | Dual-purpose cranking and deep-cycle LiFePO4 battery |
| Battery group size | Group 31 |
| Chemistry | LiFePO4 / lithium iron phosphate |
| Cell type | Prismatic LiFePO4 |
| Cell configuration | 4S1P |
| Bluetooth | Yes — compatible with iOS and Android apps |
| Self-heating | No |
| Cycle life | 4,000+ cycles |
| Warranty | 11-year manufacturer warranty |
| Voltage and capacity | |
| Nominal voltage | 12.8V |
| Nominal capacity | 172Ah |
| Stored energy | 2.20kWh |
| Operating voltage range | 10.0V – 14.6V |
| Maximum charge voltage | 15.0V |
| Current ratings | |
| Max continuous discharge | 200A |
| Max continuous charge current | 200A |
| Peak discharge / cranking | 1,000A @ 5 seconds, cranking only |
| Cranking capability | Approx. 1,000 CCA equivalent |
| Series / parallel | Max 4 batteries in parallel; series wiring is not approved for this model |
| Temperature | |
| Charge temperature range | -5°C to 55°C / 23°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 |
| Low-temperature charge protection | Yes |
| Dimensions and mechanical | |
| Overall dimensions | 12.91 in L × 6.22 in W × 8.46 in H |
| Metric dimensions | 32.79 cm × 15.80 cm × 21.49 cm |
| Weight | 40 lb / 18.14 kg |
| Terminal type | M8 female |
| Case material | ABS and PC blend |
| Flame rating | UL94-V0 |
| Enclosure protection | IP65 dust / water resistance |
| Recommended charging settings | |
| Bulk / absorption voltage | 14.2V – 14.6V |
| Absorption end condition | Stop when charge current is ≤ C/20 or 15 minutes max |
| Float voltage | 13.4V – 13.8V or disabled |
| Re-bulk voltage | 13.2V |
| Equalization | Disabled |
| Temperature compensation | 0 / disabled |
| Recommended charge rate | 50% of battery or battery-bank capacity |
| BMS high-voltage cutoff | 14.6V |
| SOC recalibration voltage | 14.6V |
| BMS protection and compliance | |
| BMS | Smart BMS with built-in battery management |
| Protections | Overcharge, over-discharge, over-current, short circuit, high temperature, low temperature, and low-temperature charge protection |
| Cell certification | UL 1642 cells |
| Thermal runaway testing | UL 9540A cells |
| Battery certification | IEC 62619:2022 |
| Compliance | CE, RoHS |
| Shipping classification | UN 38.3, Class 9 |
IP65 marine protection
Dust-resistant. Water-jet resistant. Built for demanding boat compartments.
The IP65-rated enclosure helps protect against dust, spray, and 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 Epoch dual-purpose lithium?
Start the engine, run the electronics, and remove unnecessary lead-acid weight.
This Epoch 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 & 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. Use LiFePO4-compatible charging settings and follow Epoch’s current manual, applicable marine codes, and qualified installer guidance for final wiring.
Frequently Asked Questions
Common questions about cranking, house power, fitment, charging, and marine lithium safety.
Can this lithium battery really start a gas outboard motor?
Yes. Unlike standard deep-cycle lithium batteries that may shut down under engine-starting loads, the Epoch 12V 172Ah Dual Purpose battery uses a cranking-capable BMS and is rated for 1,000A peak discharge for 5 seconds, roughly equivalent to 1,000 CCA. It is designed for compatible outboard motors up to 250 hp when the engine manufacturer’s battery requirements, alternator output, wiring, and charging profile match.
Can I use this battery for both my outboard motor and my house electronics?
Yes. That is the purpose of this dual-purpose design. The battery can provide high-output cranking power for a compatible outboard while also delivering 172Ah / 2.20kWh of deep-cycle capacity for fish finders, GPS, livewell pumps, bilge pumps, lighting, stereos, radios, and other 12V marine electronics.
Will this fit in my boat's current battery tray?
The Epoch 12V 172Ah Dual Purpose battery is built in a Group 31 footprint and measures 12.91 in L x 6.22 in W x 8.46 in H. It is designed for Group 31 replacement applications, but you should always verify tray size, lid clearance, cable routing, terminal access, and hold-down hardware before installation.
Can I connect these batteries in series for a 24V or 36V trolling motor?
No. This model is not approved for series wiring. Because it uses a specialized cranking BMS, it should not be wired in series to create 24V, 36V, or 48V systems unless Epoch provides written model-specific approval. It can be wired with up to 4 batteries in parallel for a larger 12V bank up to 688Ah.
Is the battery safe to use in a wet bilge or open deck compartment?
The battery has an IP65 enclosure rating, meaning it is highly protected against dust and low-pressure water jets from any direction. It is suitable for demanding marine compartments, center consoles, and damp battery hatches, but it should not be submerged, pressure-washed, or installed where it can sit underwater.
How do I check the battery level while I'm on the water?
This battery includes Bluetooth monitoring through compatible Epoch iOS and Android apps. From your phone, you can review important battery information such as state of charge, voltage, current flow, temperature, and BMS status while you are at the helm or rigging area.
Can my outboard motor's alternator charge this lithium battery?
The battery can accept up to 200A of charge current, but you must verify that your outboard alternator and charging system are compatible with LiFePO4 batteries. Some systems may require a lithium-ready regulator, a marine DC-to-DC charger, or manufacturer-specific guidance to protect the alternator and charge the battery correctly.
Does this battery have built-in heating?
No. This specific 12V 172Ah Dual Purpose Essential Series model does not include internal self-heating. It does include low-temperature charge protection and is rated for charging from 23°F to 131°F / -5°C to 55°C, with discharge operation down to -4°F / -20°C.
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Additional Resources
Safety certifications & listings
Every mark below is a standard this battery has been tested against or a listing it carries. Here is what each one covers, in plain English.
IP65
Ingress protection
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
IEC 60529, Degrees of protection provided by enclosures