36V 50Ah Essential Series LiFePO4 Battery (1.92kWh)
IP65BluetoothHeated
$749
In Stock
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Traditional 36-volt systems can become a collection of heavy cases, jumper cables and corrosion-prone terminals. Marine trolling-motor banks commonly create 36V by wiring three 12V lead-acid batteries in series, while many classic golf carts use six 6V batteries or another multi-battery configuration. Either approach occupies valuable space, adds substantial weight and allows system voltage to decline as the bank discharges.
Epoch 36V lithium batteries consolidate that power into a native-voltage LiFePO4 platform. A correctly sized 36V LiFePO4 battery provides lighter, maintenance-free deep-cycle energy, a flatter discharge curve and integrated Battery Management System protection. The result is a cleaner installation for compatible trolling motors, golf carts, off-grid systems and specialized 36V equipment.
The current Epoch collection includes a compact 36V 50Ah battery for marine and off-grid use, a higher-capacity 36V 100Ah battery, and a purpose-built 36V 105Ah golf cart conversion kit. Current models are rated for 3,500 or more cycles, with the 50Ah model rated for 4,000 or more cycles, and every battery presently shown in the collection carries an 11-year manufacturer warranty.
Replacing three 12V batteries with one 36V battery can simplify a compatible marine system dramatically. A native-voltage pack also offers similar advantages when replacing the larger lead-acid bank found in a 36V golf cart:
The representative graph below illustrates why a 36V lithium battery can keep a compatible motor feeling more responsive later in the day. A 38.4V-nominal LiFePO4 pack stays near its working voltage through most of the discharge, while a 36V lead-acid bank made from three 12V batteries declines more progressively as stored capacity is used.
A 36V lithium trolling motor battery is a strong choice for compatible high-thrust systems on tournament bass boats, bay boats and offshore center consoles. Current 36V-capable platforms include selected Minn Kota Ultrex and QUEST models, Garmin Force, Lowrance Ghost and Power-Pole MOVE systems. GPS anchoring and heavy wind or current can create sustained demand, making battery voltage, usable energy and continuous-output capability especially important.
Compatibility depends on electrical specifications, not brand name alone. Confirm the motor's required voltage and maximum current, then match the battery's continuous output, breaker, cable gauge, connectors and charger to the manufacturer's guidance. A flat LiFePO4 discharge curve helps maintain steadier voltage, but it cannot guarantee all-day runtime under every speed setting or condition.
A 36V lithium golf cart battery can transform many older and classic carts, including compatible EZGO TXT and Club Car DS configurations. Epoch's 36V 105Ah golf cart kit includes the LiFePO4 battery, a 36V lithium charger, dashboard battery gauge and 12V converter, with cart-specific configuration options shown on the product page.
Battery voltage must match the cart's electrical architecture. A 36V battery is not a proper substitute for a 48V battery, and a 48V battery must not be installed in a 36V cart without a complete, correctly engineered conversion. Verify the motor, controller, solenoid, charger, wiring, accessory voltage and regenerative-braking requirements before beginning an EZGO 36V lithium upgrade or another cart conversion.
A 36V deep cycle battery can also support compatible solar, backup, mobile and industrial equipment built around a 36V DC bus. Because 36V is less common than 12V, 24V or 48V in some markets, confirm that the inverter, solar charge controller, DC converter and charger support the battery's operating and charging range. Size cables, disconnects and overcurrent protection for the application's maximum current.
Epoch's 36V 50Ah Essential Series battery stores 1.92kWh, weighs approximately 35 pounds and supports 100A continuous discharge. A 36V 50Ah lithium battery holds about the same planned usable energy as three 12V 100Ah lead-acid batteries when that lead-acid bank is limited to roughly 50% depth of discharge. It is a compelling lightweight option for compatible trolling motors and other systems whose current and runtime requirements fit its ratings.
The 36V 100Ah lithium battery doubles stored energy to 3.84kWh and supports 120A continuous discharge. At approximately 75 pounds, it is intended for applications that need longer runtime, greater reserve or a larger daily energy budget. The model supports parallel expansion within Epoch's published limits, but matched batteries, balanced cabling, correct fusing and an appropriately sized charger are essential.
The 105Ah golf cart battery weighs approximately 81 pounds and delivers 200A continuous discharge, with substantially higher short-duration peak output for acceleration, hill climbing and regenerative charging. This is the collection's cart-focused solution. Actual driving range varies with vehicle weight, passenger load, tire diameter, lift height, terrain, speed, controller settings and driving style.
A 36V lithium battery is not simply a lighter replacement for a lead-acid bank. In a golf cart, it becomes the source of every acceleration, hill climb and mile of range. In a fishing boat, it determines how long the trolling motor can hold position, work a shoreline and fight wind or current before the day is over.
That is why Epoch does not treat every 36-volt application as if it needs the same generic battery.
Epoch offers purpose-built 36V LiFePO4 solutions for two very different jobs:
Each platform is engineered around the current, runtime, enclosure and installation requirements of its intended application. Customers can choose the compact Group 31 battery that saves the most space and weight, the larger 100Ah marine battery that doubles runtime, or the complete 105Ah golf cart kit that includes the major conversion components in one package.
Depending on the model, Epoch 36V lithium batteries provide Bluetooth monitoring, internal heating, advanced BMS protection, IP65 or IP67 enclosure protection, high continuous and peak-current capability, parallel expansion and an 11-year manufacturer warranty.
The result is a 36V lithium battery lineup built around real vehicles and boats—not just an amp-hour number printed on a case.
Many traditional 36V systems are assembled from multiple lower-voltage batteries. A trolling motor may use three 12V lead-acid batteries connected in series, while an older golf cart may use six 6V batteries.
That works, but it creates a heavy, maintenance-intensive bank with numerous cables and terminals.
A native 36V Epoch battery consolidates the system into one managed LiFePO4 platform.
Moving from several lead-acid batteries to one native 36V lithium battery can eliminate:
Fewer components create a cleaner installation and fewer connection points to inspect.
Lead-acid batteries are commonly operated within a conservative depth-of-discharge range to protect their service life. LiFePO4 batteries are designed for deeper routine cycling within the limits of the selected model.
That means a larger share of the battery’s rated capacity can support the cart or trolling motor before recharging.
Lead-acid voltage declines as the bank discharges and may sag further under a heavy load.
LiFePO4 maintains a flatter discharge curve. A compatible golf cart can feel more consistent later in the drive, and a compatible trolling motor can maintain steadier thrust through more of the fishing day.
Lithium does not increase a motor beyond its designed limits, but it helps reduce the progressive performance fade associated with a discharging lead-acid bank.
Three Group 31 lead-acid marine batteries can place roughly 180 to 200 pounds or more in a boat before cables and trays. A six-battery golf cart bank can be considerably heavier.
The Epoch 36V 50Ah battery weighs approximately 35 pounds. The 36V 100Ah marine battery weighs approximately 75 pounds, and the 36V 105Ah golf cart battery weighs approximately 81 pounds.
Actual savings depend on the bank being replaced, but the difference can be substantial.
For a boat, lower battery weight may improve holeshot, shallow-water draft, balance and trailer load. For a golf cart, it may improve acceleration, braking feel and the amount of work required from the motor on hills.
A native 36V battery uses one integrated Battery Management System to monitor the entire pack.
The BMS helps protect against model-specific conditions such as overcharge, excessive discharge, overcurrent, short circuits and unsafe temperatures.
In a series bank made from three separate 12V lithium batteries, each battery has its own BMS. A native 36V platform eliminates the need to manage three independently protected batteries as one system.
An older 36V golf cart can remain useful for years after its lead-acid batteries become the weakest part of the vehicle.
The right lithium conversion can remove hundreds of pounds of battery weight, eliminate watering and acid cleanup, reduce cable clutter and restore more consistent power. The wrong conversion can leave the owner trying to match a battery, charger, gauge, converter and mounting solution from different suppliers.
Epoch solves that problem with a complete 36V lithium golf cart battery kit built around one 105Ah LiFePO4 power system.
The Epoch 36V 105Ah golf cart conversion kit includes:
This is one of the strongest reasons to choose Epoch.
The battery, charger, gauge and converter are selected as parts of one conversion ecosystem. The owner or installer does not have to guess whether an old lead-acid charger is appropriate, whether a voltage reducer is required for 12V accessories or how the driver will monitor state of charge.
The kit reduces part-matching work before installation and gives Epoch support a known set of core components to help troubleshoot later.
The 36V 105Ah battery stores approximately 4.032kWh of energy.
That is substantial capacity for golf-course use, neighborhood transportation, campgrounds, farms, marinas, campuses, hunting properties and utility work.
Actual range depends on:
In many standard 36V carts, the system may provide roughly 30 to 40 miles per charge. Modified carts, larger tires, high speeds, steep terrain and heavy passenger loads can reduce that range.
The important advantage is not a single mileage claim. It is having 4.032kWh of usable lithium energy with a dashboard gauge and Bluetooth monitoring that help the driver see how much power remains.
Golf cart performance depends on current capability as well as capacity.
The Epoch 36V 105Ah kit provides:
Continuous output helps support sustained demand such as longer hills, passenger loads and rough terrain. Short-duration peak output helps with acceleration and starting on an incline.
The regenerative-current capability is important for compatible carts and controllers that return energy to the battery during braking or downhill travel.
The controller must still be programmed within the battery’s limits. Peak current is not a substitute for adequate continuous-current capability, and no battery should be expected to correct an undersized cable, failing controller or worn motor.
The 36V golf cart battery uses a sealed steel enclosure with IP67 protection.
That helps protect the battery and BMS from dust, rain, splashes, washdown exposure and temporary water contact under the conditions of the rating.
It is a much stronger foundation for outdoor vehicle use than an unsealed battery installed in a compartment that sees dirt, mud and moisture.
IP67 does not mean the battery should be left in standing water or installed without physical protection. It should still be securely restrained, protected from impact and wired so moisture cannot collect around terminals and connections.
A lead-acid-style voltage meter is a poor way to estimate lithium state of charge because LiFePO4 voltage remains relatively flat through much of the discharge cycle.
Epoch gives the driver two better options:
That combination makes the system easier to understand.
Instead of waiting for the cart to feel slow, the driver can make charging decisions from direct battery information.
The Epoch lithium conversion eliminates routine flooded lead-acid battery work:
Normal vehicle inspections still matter. Owners should check mounting hardware, terminal torque, cable condition, charger connections, fuses, the 12V converter and the battery compartment periodically.
A complete kit makes the project much more straightforward than a pieced-together conversion.
A typical installation involves:
The included charger is matched to the battery’s lithium charging requirements. It replaces the guesswork of trying to reuse an aging lead-acid charger.
Installation is designed to be approachable for experienced DIY owners and repeatable for professional golf cart shops. It is not universally identical across every model year. Tray dimensions, charger-port wiring, cable routing, controller demand and accessory wiring must still be verified.
Professional installers need more than a battery that works on a test bench. They need a system they can quote, install, explain and support consistently.
An Epoch complete kit gives the installer:
That repeatability can reduce custom fabrication, eliminate incompatible accessories and make post-installation support more efficient.
The 36V 105Ah kit is intended for compatible 36V carts, including available configurations for EZGO TXT, Club Car DS and other installations.
Before ordering, confirm:
A 36V lithium battery should not be installed in a 48V cart, and a 48V battery should not be used as a shortcut to increase the voltage of a 36V cart.
A voltage conversion requires the complete drivetrain and electrical system to be engineered for the new voltage.
A trolling motor battery earns its reputation late in the day—not during the first calm hour after launch.
Wind, current, vegetation, GPS anchoring and a heavily loaded tournament boat can expose a weak battery quickly. Falling voltage can reduce thrust, and an inaccurate battery gauge can leave an angler unsure whether there is enough energy to finish the day.
Epoch 36V trolling motor batteries are designed to solve those problems with native-voltage LiFePO4 power, marine-ready enclosures, Bluetooth monitoring, internal heating and capacity options for both weight-conscious and maximum-runtime installations.
A traditional 36V trolling motor bank commonly uses three 12V batteries connected in series.
One Epoch 36V battery can remove:
That creates a cleaner rigging compartment and can free valuable space for tackle, pumps, safety equipment or electronics.
LiFePO4 holds a flatter working voltage than lead-acid through most of the usable capacity.
That helps a compatible trolling motor maintain more consistent response while:
The battery cannot change the motor’s maximum designed thrust, but it can reduce the gradual voltage fade that makes an aging lead-acid bank feel weaker as the day continues.
Epoch offers two purpose-built 36V marine options:
Both are built for the humidity, spray, vibration and changing temperatures encountered in marine service.
An IP rating does not make the entire installation waterproof. Terminals, cables, breakers, plugs and chargers must also be protected, and no battery should remain in prolonged standing water.
Both current Epoch 36V trolling motor batteries include internal heating and low-temperature charge protection.
That matters for:
LiFePO4 cells should not be charged below their approved cell temperature without an appropriate heating strategy.
The Epoch heating system can use incoming charge energy to warm the cells before normal charging begins. The exact charging limits and heating behavior should be confirmed in the selected battery’s manual.
Built-in Bluetooth gives anglers direct visibility into battery conditions from a compatible phone.
Depending on the battery and app version, available information may include:
This is more useful than estimating lithium capacity from voltage alone.
It also allows an angler to see how different operating conditions affect energy use. GPS anchoring in 20-mile-per-hour wind may consume power very differently from slow shoreline fishing on a calm morning.
The Epoch 36V 50Ah battery provides up to 100A continuous discharge. The 36V 100Ah battery provides up to 120A continuous discharge.
Those ratings support many compatible high-thrust 36V trolling motors when the motor’s maximum current, breaker, plug, cable gauge and manufacturer requirements all match.
Do not size the battery from thrust rating or brand name alone. Check the motor’s published maximum current and select a battery whose continuous rating meets or exceeds it.
Both Epoch batteries provide native 36V power, heating, Bluetooth monitoring, advanced BMS protection and long-term warranty coverage.
The right choice depends on runtime, weight, installation space and how the boat is used.
The Epoch 36V 50Ah Essential Series battery provides:
Its dimensions are approximately 13.0 inches long, 6.8 inches wide and 9.44 inches high.
Choose the 50Ah battery when:
A single 50Ah battery can provide a full day for an efficient system with a low average current draw. It is not automatically an all-day battery for a heavy boat holding position continuously in strong wind.
The Epoch 36V 100Ah battery provides:
Its dimensions are approximately 20 inches long, 10.25 inches wide and 11 inches high.
Choose the 100Ah battery when:
The 100Ah model stores twice the energy of the 50Ah model and is the stronger one-battery choice for tournament anglers who want to size for difficult conditions rather than a calm-day estimate.
“Full day” is not a battery specification.
For one angler, it may mean six hours of intermittent shoreline fishing. For another, it may mean 12 to 15 hours of repeated GPS anchoring in heavy wind.
The correct capacity depends on the trolling motor’s average current over the complete day.
Find the trolling motor’s maximum current draw in the manufacturer’s documentation.
The battery’s continuous-discharge rating must meet or exceed that value. The breaker, cable, plug and connections must also support the current.
A battery’s peak rating should not be used as its normal continuous rating.
Runtime can be estimated with:
Runtime in hours = usable amp-hours ÷ average current in amps
For conservative planning, preserve approximately 10% reserve:
Planning runtime = battery amp-hours × 0.90 ÷ average current
Average current is often much lower than maximum current because the motor may spend part of the day:
A motor running continuously near maximum thrust will use the battery much faster.
With a 10% planning reserve, a 50Ah battery provides approximately 45Ah for runtime calculations.
Estimated runtime is approximately:
For a 10-hour day, average draw must remain near 4.5A or less.
For a 12-hour day, average draw must remain near 3.75A or less.
For a 15-hour tournament day, average draw must remain near 3A or less.
This can be realistic for an efficient motor used intermittently in moderate conditions. It is not realistic for continuous high-thrust operation.
With a 10% planning reserve, a 100Ah battery provides approximately 90Ah for planning.
Estimated runtime is approximately:
For a 10-hour day, average draw must remain near 9A or less.
For a 12-hour day, average draw must remain near 7.5A or less.
For a 15-hour day, average draw must remain near 6A or less.
A 100Ah battery gives the angler twice the energy reserve of a 50Ah battery and provides much more tolerance for changing wind, current and fishing plans.
With a 10% reserve:
With a 10% reserve:
These figures show why no honest manufacturer can promise that one battery will last all day on every boat.
The best approach is to monitor actual current with the Epoch Bluetooth app during representative conditions, calculate the real average and add reserve for difficult weather.
A single 36V 100Ah battery is the simplest long-runtime solution, but it is not always the best physical layout for every tournament boat.
Many boats already have battery trays designed around Group 31 cases. The Epoch 36V 50Ah battery fits that familiar footprint and supports up to four matched batteries in parallel.
That gives professional-style installations a modular way to increase capacity without requiring one very large case.
Matched 36V 50Ah batteries can create:
With a 10% reserve, the approximate average current supported for a 15-hour day is:
For a 12-hour day:
This modular approach lets the angler size the bank around measured demand instead of choosing between only 50Ah and 100Ah.
The 36V 50Ah battery can fit many existing Group 31 tray locations.
That can allow an installer to:
A single 75-pound 100Ah battery may be simpler electrically, but two 35-pound Group 31 batteries may be easier to place and handle in a divided compartment.
A properly engineered parallel bank uses multiple independent battery cases and BMS units.
If one battery is intentionally isolated or becomes unavailable, the remaining batteries may be able to continue operating the trolling motor, provided their combined current and remaining capacity are sufficient.
That can provide a degree of operational redundancy for tournament use.
It should not be described as a guaranteed fail-safe system. A shared cable, breaker, busbar, charger or trolling-motor connection can still create a single point of failure, and the remaining batteries may be overloaded if the bank is not designed for the reduced configuration.
True redundancy requires thoughtful circuit design, individual battery protection and a clear isolation strategy.
Both choices provide approximately 100Ah and 3.84kWh.
Choose one 36V 100Ah battery when you prefer:
Choose two 36V 50Ah Group 31 batteries when you prefer:
Neither approach is universally better. The best design depends on the boat’s space, weight distribution, required runtime, wiring and service strategy.
Use only matched batteries approved for parallel connection.
A professional parallel installation should use:
Do not mix a 36V 50Ah battery with a 36V 100Ah battery in one parallel bank.
A 36V LiFePO4 battery requires a compatible 36V lithium charging profile.
Do not assume that an older 36V lead-acid golf cart or marine charger is suitable. Lead-acid chargers may use equalization, desulfation or voltage behavior that is inappropriate for LiFePO4.
Epoch offers a dedicated 36V 15A LiFePO4 charger for compatible batteries.
The charger uses:
The 36V 105Ah golf cart complete kit includes a matched 15A charger. For the 36V 50Ah and 100Ah marine batteries, the compatible charger is available separately.
The charger may be mounted as a semi-permanent onboard marine charger in a dry, secure location with correct cable routing and strain relief.
Ideal bulk-stage time can be estimated as:
Battery amp-hours ÷ charger amps = approximate charging hours
Allow additional time for the final charging stage, battery balancing and system losses.
Approximate times from fully depleted with a 15A charger are:
Most batteries will not begin every charge at zero state of charge, so normal recharge time may be shorter.
A large tournament bank may require more charging time than one compact 50Ah battery. Size the charging system around the energy that must be replaced before the next launch.
For compatible marine systems, a 12V-to-36V or dual-output marine DC-to-DC charger can use energy from a compatible starter-battery and alternator system to provide regulated charging to the 36V trolling motor battery while the outboard is running.
This charge-on-the-run strategy can replace part of the energy used between fishing locations.
It does not create unlimited runtime. Charging depends on alternator capacity, engine runtime, charger output, source-system loads and battery conditions.
Never connect a 36V battery directly to a 12V alternator or starting battery.
A 36V lithium battery can also be charged from solar when the system uses an MPPT controller that supports the battery’s voltage and charging range.
The solar controller must be selected for:
Solar panels should not normally be connected directly to the battery.
The 36V 50Ah and 100Ah marine batteries include internal heating.
The 36V 105Ah golf cart battery does not list internal self-heating. It includes low-temperature charge protection and should be charged within its published temperature range.
Do not assume every Epoch 36V battery has the same cold-weather behavior.
The 36V 105Ah complete kit is designed for compatible:
The 36V 50Ah and 100Ah batteries support compatible:
Compatibility is determined by voltage and current requirements, not brand name alone.
Lead-acid voltage declines as capacity is used. LiFePO4 maintains steadier voltage through most of the usable charge.
This helps compatible carts and trolling motors feel more consistent later in the day.
Lithium batteries allow deeper routine cycling within their specified limits.
A 36V 50Ah lithium battery can provide planned usable energy comparable to a much larger nominal lead-acid bank that is operated conservatively.
Replacing several lead-acid batteries with one Epoch lithium battery can remove well over 100 pounds from some installations.
One native 36V battery eliminates several series cables and terminals.
Bluetooth-equipped Epoch batteries provide direct battery information rather than relying on voltage alone.
A 36V lithium battery is a long-term investment, and the system surrounding it may include a motor controller, trolling motor, charger, converter, gauge, cabling and protection.
Epoch provides U.S.-based customer and technical support for:
Epoch also works with authorized dealers, installers and integration partners. Customers who prefer local help can use the Epoch dealer locator to identify available support in their area.
Every battery currently shown in the 36V collection carries an 11-year manufacturer warranty. Registration, proof of purchase and the applicable warranty terms are required.
A low-priced battery can become expensive when there is no one to answer the phone, no compatible charger, no replacement documentation and no local installation path.
Epoch combines the battery with the support structure needed to own it confidently.
