Epoch Batteries 36V 50Ah Essential Series LiFePO4 Battery
Save 0%
Save %
Original price
$749.00
-Original price
$749.00
Original price
$749.00
$749.00-$749.00
Current price
$749.00
| /
✓ Authorized Epoch Batteries Dealer ✓ Lowest Price Match Guarantee ✓ FAST & FREE Shipping: In Stock Ready To Ship ✓ Questions? Talk to a Epoch Batteries Expert: 1-303-876-7654
Login for Exclusive Member Pricing.
Not a member? Create a Free Account.
Epoch 36V 50Ah Essential Series LiFePO4 Battery (1.92kWh)
One 36V battery in a Group 31 case, in place of three 12V batteries wired in series. That's the whole proposition: 35 pounds instead of well over a hundred, one BMS instead of three that can't see each other, and one set of terminals instead of a series harness that has to be right.
50Ah at 38.4V for 1.92kWh, 100A of continuous discharge, internal heating so it charges down to −4°F, IP65 sealing and Bluetooth monitoring. 4,000+ cycles behind Epoch's 11-year warranty, with up to four in parallel for 200Ah. Renewable Outdoors is an authorized Epoch dealer — call us at (303) 876-7654 and we'll check it against your trolling motor.
11-Year Warranty
Lowest Price Guarantee
Authorized Epoch Dealer
Free Shipping
0% APR Financing
Expert Support: (303) 876-7654
Why the 36V 50Ah Essential
35 lbs Instead of Three Batteries
A single Group 31 case replacing three 12V lead-acid batteries and well over a hundred pounds in the bow.
100A Continuous
Drives a 36V trolling motor at full throttle, with 130A available for ten seconds.
Internal Heating
Charges down to −4°F with low-temperature charge protection — early and late season are no problem.
IP65 Sealed
Dust-tight and water-resistant, which is the right specification for a bow compartment.
Bluetooth Monitoring
State of charge, voltage and alarms in the Epoch app on iOS and Android.
4,000+ Cycles
For a fishing season of fifty or sixty outings, effectively unlimited — behind an 11-year warranty.
What's Included
What You Get
1 × Epoch 36V 50Ah Essential Series LiFePO4 battery
Documentation and warranty paperwork
A 36V lithium charger and cables are separate — we stock Epoch's 36V 15A charger, which is the natural match. Terminals are M8 female. This battery cannot be wired in series; expansion is by parallel connection only, up to four batteries. We also stock an Essential Series tray sized for this model.
Epoch 36V 50Ah Essential Series Specifications
Cell Chemistry
LiFePO4 (lithium iron phosphate), prismatic cells
Cell Configuration
12S
Rated Capacity
50Ah — 1.92kWh
Nominal Voltage
38.4V (36V system)
Maximum Charge Voltage
43.8V
Operating Voltage Range
30.0–43.8V
Maximum Continuous Discharge
100A
Maximum Continuous Charge
100A
Peak Discharge
130A for 10 seconds
Peak Charge
120A for 10 seconds
Series Configuration
Not supported — native 36V
Parallel Configuration
Up to 4 in parallel, plug and play — 200Ah
Cycle Life
4,000+ cycles
Charging Temperature
−4°F to 131°F (−20°C to 55°C) with heating
Discharging Temperature
−4°F to 140°F (−20°C to 60°C)
Storage Temperature
32°F to 95°F (0°C to 35°C), max 12 months
Internal Heating
Yes, with low-temperature charge protection
Ingress Protection
IP65 — dust-tight, water-resistant
Communications
Bluetooth with iOS and Android apps
Case Material
ABS / PC, UL94-V0
Terminals
M8 female
Dimensions
13.0" × 6.8" × 9.44" (Group 31 footprint)
Weight
35 lbs (approx. 15.88 kg)
Certifications
UL1642 and UL9540A cells; IEC 62619:2022; CE; RoHS
Shipping Classification
UN 38.3 Class 9
SKU
3650A-H
Warranty
11-year limited warranty
11-Year Warranty
Every 36V 50Ah Essential carries Epoch's 11-year limited manufacturer warranty.
Lowest Price Guarantee
Found it cheaper elsewhere? Call us at (303) 876-7654 before you buy.
Authorized Epoch Dealer
Genuine Epoch hardware with full manufacturer support behind it.
It depends on throttle, which is the honest answer. 1.92kWh against a motor drawing 25A at 36V gives you about two hours at that draw — but real fishing is mostly spot-lock and low speed, so a typical day is well within reach. If you fish hard all day at high speed, look at the 36V 100Ah instead, or run two of these in parallel.
Why one 36V battery instead of three 12V batteries?
Weight, simplicity and reliability. Three 12V lead-acid batteries for a 36V motor weigh well over 100 lbs against this battery's 35. Three separate BMSs can't see each other, so one weak battery drags the string down invisibly. And a series harness is three more connections that can corrode or come loose in a wet bow compartment.
Can I wire two in series for 72V?
No — this battery does not support series connection. Expansion is by parallel only, up to four batteries for 200Ah at 36V. If you need 72V, that's a different product; call us at (303) 876-7654 and we'll point you at the right one.
Will it fit my existing battery compartment?
It's a Group 31 footprint at 13.0 by 6.8 by 9.44 inches, which is the size most bow compartments are built around — and remember you're replacing three batteries with one, so space is rarely the constraint. Measure the height with cables attached before ordering.
What does IP65 protect against?
Dust-tight and resistant to water jets — so rain, spray and wash-down are fine. It's not rated for submersion, unlike Epoch's IP67 Elite and Pro batteries. For a covered bow compartment IP65 is appropriate; if the compartment regularly holds standing water, consider a Pro Series battery instead.
Does the heater matter for fishing?
It matters at the ends of the season. Without heating, a lithium battery below freezing simply refuses to charge — so a battery left on the boat overnight in March can't be topped up in the morning. With heating, it warms itself and charges normally down to −4°F.
Why lithium iron phosphate rather than lead-acid?
You can use nearly all of the rated capacity rather than half, so a 100Ah LFP battery does the work of a 200Ah lead-acid one. It weighs roughly a third as much for the same usable energy. And it lasts thousands of cycles instead of a few hundred, so the cost per useful cycle is dramatically lower despite the higher purchase price.
Do I need a lithium-specific charger?
Yes. A lead-acid charger's absorption and float voltages are wrong for LFP — it will either leave the battery short of full or hold it at a voltage that shortens its life. Any charger with a LiFePO4 profile works, and we stock Epoch's own matched chargers in 12V, 24V, 36V and 48V.
How should I store it over winter?
Between 32°F and 95°F for up to twelve months, ideally around half charged. Self-discharge is slow, so a top-up before the season starts is normally all it needs. Don't leave it fully charged or fully empty for months at a time.
Do you offer financing or price matching?
Yes. We offer 0% APR financing options through Affirm at checkout, and our Lowest Price Guarantee applies — if you find this battery cheaper at another authorized dealer, call us at (303) 876-7654 before you order and we'll take care of it.
