{"product_id":"epoch-36v-50ah-essential-lifepo4-battery","title":"Epoch 36V 50Ah LiFePO4 Battery | Heated Group 31 Trolling Motor","description":"\u003cstyle\u003e\n.lbs-faq{max-width:900px;margin:0 auto}\n.lbs-faq details{border:1px solid #d9dde3;border-radius:8px;margin:0 0 12px;overflow:hidden;background:#fff}\n.lbs-faq summary{list-style:none;cursor:pointer;padding:16px 20px;font-weight:600;font-size:18px;display:flex;justify-content:space-between;align-items:center;background:#f6f8fa}\n.lbs-faq summary::-webkit-details-marker{display:none}\n.lbs-faq summary::after{content:\"+\";font-size:22px;line-height:1;color:#0b5cad;margin-left:16px;flex:0 0 auto}\n.lbs-faq details[open] summary::after{content:\"\\2212\"}\n.lbs-faq details[open] summary{background:#eef3f8}\n.lbs-faq .lbs-faq-body{padding:16px 20px}\n.lbs-body{color:#1c2430}\n.lbs-body h3{font-size:24px;margin:0 0 6px}\n.lbs-body h4{font-size:20px;margin:22px 0 8px}\n.lbs-lead{color:#4a5666;font-size:18px;margin:0 0 16px}\n.lbs-specs{width:100%;border-collapse:collapse;margin:0 0 8px}\n.lbs-specs th{text-align:left;background:#0b2740;color:#fff;padding:10px 14px;font-size:18px}\n.lbs-specs td{padding:10px 14px;border-bottom:1px solid #e3e7ec;font-size:18px}\n.lbs-specs tr:nth-child(even) td{background:#f6f8fa}\n.lbs-specs td:first-child{font-weight:600;width:46%}\n.lbs-note{background:#f6f8fa;border-left:4px solid #0b5cad;padding:14px 18px;font-size:18px;margin:16px 0}\n.lbs-bullets{font-size:18px;line-height:1.6;padding-left:22px;margin:0 0 16px}\n.lbs-works{border-left:4px solid #1e8e4e;background:#f2faf5;padding:12px 18px;margin:0 0 14px}\n.lbs-verify{border-left:4px solid #c98a00;background:#fdf8ee;padding:12px 18px;margin:0 0 14px}\n.lbs-not{border-left:4px solid #c0392b;background:#fcf3f2;padding:12px 18px;margin:0 0 14px}\n\u003c\/style\u003e\n\u003cdiv class=\"lbs-body\"\u003e\n\u003c!-- ================= TAB 1: OVERVIEW ================= --\u003e\n\u003cp class=\"lbs-lead\"\u003eHeated, Bluetooth LiFePO4 deep-cycle power in a Group 31 marine footprint.\u003c\/p\u003e\n\u003cdiv class=\"lbs-note\"\u003e\n\u003cstrong\u003eQuick answer.\u003c\/strong\u003e The Epoch 36V 50Ah Essential Series (SKU 3650A-H) is a heated, Bluetooth LiFePO4 deep-cycle battery in a Group 31 case. It stores 1.92 kWh, delivers 100A continuous discharge, and is built for 36V trolling motor and marine deep-cycle use. One battery replaces a three-battery 12V lead-acid 36V bank. It is deep-cycle only and is not for engine starting. It supports up to 4 batteries in parallel and 1 in series, weighs about 35 lbs, is IP65 rated, and carries an 11-year manufacturer warranty.\u003c\/div\u003e\n\u003cp style=\"font-size: 18px;\"\u003eThe Epoch 36V 50Ah Essential Series is a lithium iron phosphate (LiFePO4) deep-cycle battery designed for 36V trolling motor systems and compatible 36V marine and off-grid power. It packs 1.92 kWh of usable energy into a standard Group 31 case, so anglers can retire a heavy three-battery 12V lead-acid bank and run a single lithium battery instead.\u003c\/p\u003e\n\u003cp style=\"font-size: 18px;\"\u003eIt is built for fishermen who want less weight at the bow, more consistent thrust, and simple monitoring. Internal self-heating supports charging in cold conditions, built-in Bluetooth reports state of charge and voltage to the Epoch app, and an advanced BMS protects the cells. What sets this model apart from a basic 12V lithium battery is that it is a single 36V unit purpose-built for 36V trolling motors, delivering a flat discharge curve that holds thrust deep into the pack.\u003c\/p\u003e\n\u003ch4\u003eWhy anglers choose this battery\u003c\/h4\u003e\n\u003cul class=\"lbs-bullets\"\u003e\n\u003cli\u003e36V 50Ah (1.92 kWh) LiFePO4 in a Group 31 case for 36V trolling motors\u003c\/li\u003e\n\u003cli\u003eReplaces three 12V lead-acid batteries with one unit at about 35 lbs\u003c\/li\u003e\n\u003cli\u003eInternal self-heating with low-temperature charge protection\u003c\/li\u003e\n\u003cli\u003eBluetooth state-of-charge monitoring via the Epoch iOS and Android apps\u003c\/li\u003e\n\u003cli\u003eIP65 enclosure, 4,000+ cycle life, and an 11-year manufacturer warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eWhat each feature means for you\u003c\/h4\u003e\n\u003cul style=\"font-size: 18px; line-height: 1.6;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlat LiFePO4 discharge curve, \u003c\/strong\u003eholds voltage and thrust through most of the pack, so speed does not fade the way it does with lead-acid.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle 36V design, \u003c\/strong\u003eone battery, one set of connections; no three-battery bank to wire, balance, or maintain.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal self-heating, \u003c\/strong\u003esupports charging in cold weather and protects the cells from low-temperature charge damage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBluetooth monitoring, \u003c\/strong\u003echeck remaining charge on your phone instead of guessing how much fishing time is left.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIP65 enclosure, \u003c\/strong\u003edust-tight and water-jet resistant for wet decks and spray.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4,000+ cycles, maintenance-free,\u003c\/strong\u003e long service life with no watering or acid upkeep.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- ================= TAB 2: APPLICATIONS ================= --\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cp class=\"lbs-lead\"\u003eMarine trolling motors, fishing boats, and compatible 36V power systems.\u003c\/p\u003e\n\u003cp style=\"font-size: 18px;\"\u003eThe 36V 50Ah Essential Series is built for 36V trolling motor and marine deep-cycle use, and for other 36V power systems where voltage, current, and charger requirements match.\u003c\/p\u003e\n\u003ch4\u003eBest applications\u003c\/h4\u003e\n\u003cul style=\"font-size: 18px; line-height: 1.6;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e36V trolling motors: \u003c\/strong\u003ethe primary use; a single 36V battery powers the motor with a flat, stable discharge.\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBass boats, fishing boats, pontoons, skiffs, aluminum boats:\u003c\/strong\u003e the light Group 31 package frees bow weight and storage.\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystems commonly used with Minn Kota, Garmin, and Lowrance motors, \u003c\/strong\u003ewhen the motor's voltage and current requirements are compatible.\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible 36V solar, off-grid, and backup systems, \u003c\/strong\u003ewhen charging and inverter equipment are built for 36V and lithium.\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCold-weather fishing, \u003c\/strong\u003einternal heating and low-temperature charge protection help in freezing conditions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eWho should buy this\u003c\/h4\u003e\n\u003cul style=\"font-size: 18px; line-height: 1.6;\"\u003e\n\u003cli\u003eAnglers running a 36V trolling motor who want to drop three 12V lead-acid batteries down to one lithium battery.\u003c\/li\u003e\n\u003cli\u003eBoaters who need to cut bow weight and free storage without losing runtime.\u003c\/li\u003e\n\u003cli\u003eFishermen who want Bluetooth state-of-charge visibility on the water.\u003c\/li\u003e\n\u003cli\u003eOwners in cold climates who need cold-weather charging support.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eWho should not buy this\u003c\/h4\u003e\n\u003cul style=\"font-size: 18px; line-height: 1.6;\"\u003e\n\u003cli\u003eAnyone needing an engine-cranking or outboard-starting battery this is deep-cycle only. Consider a dual-purpose cranking model instead.\u003c\/li\u003e\n\u003cli\u003eAnyone needing a 12V, 24V, or 48V battery, this is a 36V unit and cannot be wired in series to raise voltage.\u003c\/li\u003e\n\u003cli\u003eAnyone who needs more than 50Ah in a single case, add batteries in parallel, or choose a higher-capacity platform.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- ================= TAB 3: ESTIMATED RUNTIME ================= --\u003e\n\u003ch3\u003eEstimated Runtime\u003c\/h3\u003e\n\u003cp class=\"lbs-lead\"\u003eHow long 50Ah lasts depends on your trolling motor's average current draw.\u003c\/p\u003e\n\u003cp style=\"font-size: 18px;\"\u003eEstimate runtime by dividing usable amp-hours by the average current your 36V trolling motor draws. LiFePO4 delivers close to its full rated capacity, so roughly 50Ah is usable. Because a 36V motor draws fewer amps than a 12V motor for the same thrust, a 36V 50Ah battery goes further on the water than the number alone suggests.\u003c\/p\u003e\n\u003ctable class=\"lbs-specs\" style=\"font-size: 18px;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eAverage 36V current draw\u003c\/th\u003e\n\u003cth\u003eApprox. continuous runtime\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5A (spot-lock idle, low speed)\u003c\/td\u003e\n\u003ctd\u003e~10 hours\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e10A (light cruising)\u003c\/td\u003e\n\u003ctd\u003e~5 hours\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e15A (steady cruising)\u003c\/td\u003e\n\u003ctd\u003e~3.3 hours\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e20A (moderate)\u003c\/td\u003e\n\u003ctd\u003e~2.5 hours\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e25A (moderate-high)\u003c\/td\u003e\n\u003ctd\u003e~2 hours\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e30A (high)\u003c\/td\u003e\n\u003ctd\u003e~1.7 hours\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e40A (near max thrust)\u003c\/td\u003e\n\u003ctd\u003e~1.25 hours\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e50A (max thrust)\u003c\/td\u003e\n\u003ctd\u003e~1 hour\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"font-size: 16px; color: #4a5666; margin: 0 0 16px;\"\u003eEstimates use 50Ah ÷ average continuous draw. Actual draw varies with thrust setting, wind, current, boat weight, hull type, and how often the motor runs. These are estimates, not guaranteed runtime.\u003c\/p\u003e\n\u003ch4\u003eReal-world fishing days\u003c\/h4\u003e\n\u003cp style=\"font-size: 18px;\"\u003eMost fishing is intermittent spot-lock, drifting, repositioning, and breaks so continuous draw rarely applies across a full day. In typical use with spot-lock and sonar or LiveScope-style running, owners frequently report a full day on the water with substantial charge remaining. As two reported owner examples: one angler finished about 5 hours running an Ultrex with LiveScope and had roughly 78% remaining, and another logged about 6.5 hours of trolling-motor use with roughly 60% remaining. These are individual reported experiences, not manufacturer runtime ratings.\u003c\/p\u003e\n\u003cdiv class=\"lbs-note\"\u003e\n\u003cstrong\u003eNeed more runtime?\u003c\/strong\u003e For longer days or higher-draw conditions strong wind, current, heavier boats, or aggressive continuous running, add capacity by wiring matched batteries in parallel, up to four for as much as 200Ah.\u003c\/div\u003e\n\u003c!-- ================= TAB 4: COMPATIBILITY ================= --\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp class=\"lbs-lead\"\u003eWhat it works with, what to verify first, and what it is not for.\u003c\/p\u003e\n\u003cdiv class=\"lbs-works\"\u003e\n\u003ch4 style=\"margin-top: 0;\"\u003eWorks with\u003c\/h4\u003e\n\u003cul style=\"font-size: 18px; line-height: 1.6; margin-bottom: 0;\"\u003e\n\u003cli\u003e36V trolling motor systems with compatible voltage and current requirements\u003c\/li\u003e\n\u003cli\u003eGroup 31 battery trays that fit a 13.0 in × 6.8 in × 9.44 in case\u003c\/li\u003e\n\u003cli\u003eSingle-output 36V LiFePO4-compatible chargers set to the recommended lithium profile\u003c\/li\u003e\n\u003cli\u003e36V-capable solar charge controllers and inverter\/chargers programmed for lithium\u003c\/li\u003e\n\u003cli\u003eUp to four matched 3650A-H batteries wired in parallel (up to 200Ah)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"lbs-verify\"\u003e\n\u003ch4 style=\"margin-top: 0;\"\u003eVerify before buying\u003c\/h4\u003e\n\u003cul style=\"font-size: 18px; line-height: 1.6; margin-bottom: 0;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eTray fit:\u003c\/strong\u003e confirm your tray accepts 13.0 in × 6.8 in × 9.44 in and the hold-down straps reach.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminals:\u003c\/strong\u003e this battery uses M8 female terminals, confirm your cable lugs and bolt length match.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCharger:\u003c\/strong\u003e confirm you have a single-output 36V lithium charger, not a three-bank 12V onboard charger.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMotor requirements:\u003c\/strong\u003e confirm your trolling motor's continuous and peak current stay within 100A continuous \/ 130A peak.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCable and fusing:\u003c\/strong\u003e confirm cable gauge, fusing, and disconnects are sized for your load.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"lbs-not\"\u003e\n\u003ch4 style=\"margin-top: 0;\"\u003eNot designed for\u003c\/h4\u003e\n\u003cul style=\"font-size: 18px; line-height: 1.6; margin-bottom: 0;\"\u003e\n\u003cli\u003eEngine cranking or outboard starting, this is a deep-cycle battery.\u003c\/li\u003e\n\u003cli\u003eSeries wiring, a maximum of one battery in series; it cannot be combined to make 72V.\u003c\/li\u003e\n\u003cli\u003eMixing in the same bank with lead-acid or other-chemistry batteries.\u003c\/li\u003e\n\u003cli\u003eSubmersion, pressure washing, or standing water around the terminals (IP65, not submersible).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- ================= TAB 5: CHARGING \u0026 INSTALLATION ================= --\u003e\n\u003ch3\u003eCharging \u0026amp; Installation\u003c\/h3\u003e\n\u003cp class=\"lbs-lead\"\u003eUse a single-output 36V LiFePO4 charger set to Epoch's recommended profile.\u003c\/p\u003e\n\u003ctable class=\"lbs-specs\" style=\"font-size: 18px;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eRecommended charging setting\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBulk \/ absorption voltage\u003c\/td\u003e\n\u003ctd\u003e42.6V – 43.2V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAbsorption end condition\u003c\/td\u003e\n\u003ctd\u003eStop at ≤ C\/20, or 15 minutes max\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFloat voltage\u003c\/td\u003e\n\u003ctd\u003eDisabled preferred, or 40.0V – 40.8V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRe-bulk voltage\u003c\/td\u003e\n\u003ctd\u003e39.6V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature compensation\u003c\/td\u003e\n\u003ctd\u003e0 mV\/°C (none)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEqualization\u003c\/td\u003e\n\u003ctd\u003eDisabled\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMS high-voltage cutoff\u003c\/td\u003e\n\u003ctd\u003e43.8V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended charge rate\u003c\/td\u003e\n\u003ctd\u003e50% of capacity (about 25A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4\u003eCharger sizing and charge time\u003c\/h4\u003e\n\u003cp style=\"font-size: 18px;\"\u003eA 36V 15A lithium charger recharges a fully depleted battery in roughly 3.5 hours plus a short absorption stage. A larger charger (up to about 25A, or 50% of capacity) shortens that time. Charge time is approximate and depends on the charger, starting state of charge, and temperature.\u003c\/p\u003e\n\u003ch4\u003eOnboard, solar, and cold-weather charging\u003c\/h4\u003e\n\u003cul style=\"font-size: 18px; line-height: 1.6;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eOnboard chargers:\u003c\/strong\u003e use a single-output 36V lithium charger. A three-bank onboard charger designed for three separate 12V batteries is not compatible with one 36V lithium battery.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlternator:\u003c\/strong\u003e this battery is not designed for direct charging from a 12V boat alternator; use a 36V lithium charger or an appropriate DC-DC solution.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSolar:\u003c\/strong\u003e charge through a 36V-capable MPPT solar charge controller programmed to the lithium settings above.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCold weather:\u003c\/strong\u003e internal self-heating supports charging in cold conditions, and the BMS provides low-temperature charge protection. Stay within the approved temperature range.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eInstallation checklist\u003c\/h4\u003e\n\u003cul style=\"font-size: 18px; line-height: 1.6;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eFootprint:\u003c\/strong\u003e Group 31, 13.0 in L × 6.8 in W × 9.44 in H, about 35 lbs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminals:\u003c\/strong\u003e M8 female, match cable lugs and bolt length.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWiring:\u003c\/strong\u003e size cable, fusing, and disconnects for your motor's current.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e up to 4 in parallel (matched batteries), maximum 1 in series.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eWhat's included\u003c\/h4\u003e\n\u003cp style=\"font-size: 18px;\"\u003eThe 36V 50Ah battery unit. A compatible 36V charger and a battery tray are sold separately. Confirm any small terminal hardware supplied with your order.\u003c\/p\u003e\n\u003ch4\u003eWhat you may also need\u003c\/h4\u003e\n\u003cul style=\"font-size: 18px; line-height: 1.6;\"\u003e\n\u003cli\u003eA single-output 36V LiFePO4 battery charger (for example, the Epoch 36V 15A charger)\u003c\/li\u003e\n\u003cli\u003eA Group 31 battery tray or hold-down for the 3650A-H\u003c\/li\u003e\n\u003cli\u003eMarine-grade cable, ring terminals, fusing, and a battery disconnect sized for your system\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- ================= TAB 6: SPECIFICATIONS ================= --\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cp class=\"lbs-lead\"\u003eManufacturer-verified against the physical battery label and Epoch data sheet.\u003c\/p\u003e\n\u003ctable class=\"lbs-specs\" style=\"font-size: 18px;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth colspan=\"2\"\u003eElectrical \u0026amp; System\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel \/ SKU (MPN)\u003c\/td\u003e\n\u003ctd\u003e3650A-H\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eEssential Series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChemistry\u003c\/td\u003e\n\u003ctd\u003eLiFePO4 (prismatic, 12S)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem voltage\u003c\/td\u003e\n\u003ctd\u003e36V (38.4V nominal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCapacity\u003c\/td\u003e\n\u003ctd\u003e50Ah\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnergy stored\u003c\/td\u003e\n\u003ctd\u003e1.92 kWh (1920 Wh)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating voltage range\u003c\/td\u003e\n\u003ctd\u003e30.0V – 43.8V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax charge voltage\u003c\/td\u003e\n\u003ctd\u003e43.8V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGroup size\u003c\/td\u003e\n\u003ctd\u003eGroup 31\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"2\"\u003eCurrent Ratings\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax continuous discharge\u003c\/td\u003e\n\u003ctd\u003e100A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePeak discharge\u003c\/td\u003e\n\u003ctd\u003e130A (10 seconds)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax continuous charge\u003c\/td\u003e\n\u003ctd\u003e100A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax charge current\u003c\/td\u003e\n\u003ctd\u003e120A (10 seconds)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries \/ parallel\u003c\/td\u003e\n\u003ctd\u003eMax 1 in series \/ max 4 in parallel (up to 200Ah)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"2\"\u003eTemperature\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCharge temp (with heating)\u003c\/td\u003e\n\u003ctd\u003e-20°C to 55°C \/ -4°F to 131°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCell \/ battery charge temp\u003c\/td\u003e\n\u003ctd\u003e0°C to 55°C \/ 32°F to 131°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDischarge temp range\u003c\/td\u003e\n\u003ctd\u003e-20°C to 60°C \/ -4°F to 140°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage temp (max 12 months)\u003c\/td\u003e\n\u003ctd\u003e0°C to 35°C \/ 32°F to 95°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReconnect temp\u003c\/td\u003e\n\u003ctd\u003e50°C \/ 122°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"2\"\u003eMechanical\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions (L × W × H)\u003c\/td\u003e\n\u003ctd\u003e13.0 in × 6.8 in × 9.44 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e35 lbs (approx. 15.9 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal type\u003c\/td\u003e\n\u003ctd\u003eM8 female\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCase material\u003c\/td\u003e\n\u003ctd\u003eABS \u0026amp; PC blend, UL94-V0 flame rating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnclosure protection\u003c\/td\u003e\n\u003ctd\u003eIP65 (dust-tight, water-jet resistant)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"2\"\u003eMonitoring, BMS \u0026amp; Compliance\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBluetooth\u003c\/td\u003e\n\u003ctd\u003eYes, Epoch iOS and Android apps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMS protection\u003c\/td\u003e\n\u003ctd\u003eOvercharge, over-discharge, over-current, short circuit, high\/low temp disconnect\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLow-temp charge protection\u003c\/td\u003e\n\u003ctd\u003eYes (with internal heating)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd\u003eUL 1642 (cells), UL 9540A (cells), IEC 62619:2022, CE, RoHS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping classification\u003c\/td\u003e\n\u003ctd\u003eUN 38.3, Class 9\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCycle life\u003c\/td\u003e\n\u003ctd\u003e4,000+ cycles\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e11-year limited manufacturer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4\u003eLithium vs lead-acid at a glance\u003c\/h4\u003e\n\u003ctable class=\"lbs-specs\" style=\"font-size: 18px;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eAttribute\u003c\/th\u003e\n\u003cth\u003eEpoch 36V 50Ah LiFePO4\u003c\/th\u003e\n\u003cth\u003eThree 12V lead-acid (typical)\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUsable capacity\u003c\/td\u003e\n\u003ctd\u003eClose to full rated 50Ah\u003c\/td\u003e\n\u003ctd\u003eOften about half of rated, to preserve life\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003eAbout 35 lbs (one battery)\u003c\/td\u003e\n\u003ctd\u003eRoughly 180–210 lbs (three batteries)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage under load\u003c\/td\u003e\n\u003ctd\u003eFlat and stable\u003c\/td\u003e\n\u003ctd\u003eDeclines as it discharges\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCycle life\u003c\/td\u003e\n\u003ctd\u003e4,000+ cycles\u003c\/td\u003e\n\u003ctd\u003eCommonly a few hundred cycles\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaintenance\u003c\/td\u003e\n\u003ctd\u003eMaintenance-free\u003c\/td\u003e\n\u003ctd\u003eFlooded types need watering\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"font-size: 16px; color: #4a5666; margin: 0 0 8px;\"\u003eLead-acid figures are typical category ranges for comparison and vary by product.\u003c\/p\u003e\n\u003ch4\u003eBluetooth app and safety\u003c\/h4\u003e\n\u003cp style=\"font-size: 18px;\"\u003eThe Epoch app (iOS and Android) connects over Bluetooth to show state of charge, voltage, current, and battery status. Bluetooth is a direct phone-to-battery connection and does not need an internet connection while you are near the battery. The advanced BMS protects against overcharge, over-discharge, over-current, short circuit, and temperature extremes. Protection features guard the battery, but they do not make it immune to installation errors, incorrect chargers, or physical damage.\u003c\/p\u003e\n\u003c!-- ================= TAB 7: FAQ ================= --\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"lbs-faq\"\u003e\n\u003cdetails open=\"\"\u003e\n\u003csummary\u003eWhat is the Epoch 36V 50Ah Essential Series battery?\u003c\/summary\u003e\n\u003cdiv class=\"lbs-faq-body\"\u003e\n\u003cp style=\"font-size: 18px;\"\u003eThe Epoch 36V 50Ah Essential Series (SKU 3650A-H) is a 36V lithium iron phosphate (LiFePO4) deep-cycle battery in a Group 31 case. It stores 1.92 kWh of energy, delivers 100A continuous discharge, and includes internal self-heating, Bluetooth monitoring, and an advanced BMS. It is designed for 36V trolling motors and compatible 36V marine and off-grid power systems.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails open=\"\"\u003e\n\u003csummary\u003eWill the Epoch 36V 50Ah fit my Group 31 battery tray?\u003c\/summary\u003e\n\u003cdiv class=\"lbs-faq-body\"\u003e\n\u003cp style=\"font-size: 18px;\"\u003eIt is built around a Group 31 marine footprint and measures 13.0 in L by 6.8 in W by 9.44 in H, so it fits many existing Group 31 trays and straps. Before installing, verify your tray size, cable clearance, terminal orientation, and hold-down fitment, since tray designs vary between boats.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails open=\"\"\u003e\n\u003csummary\u003eHow long will the Epoch 36V 50Ah run my 36V trolling motor?\u003c\/summary\u003e\n\u003cdiv class=\"lbs-faq-body\"\u003e\n\u003cp style=\"font-size: 18px;\"\u003eEstimate runtime by dividing about 50 usable amp-hours by your motor's average current draw: roughly 5 hours at 10A, 2.5 hours at 20A, and about 1 hour near max thrust. Because fishing is usually intermittent with spot-lock and sonar, many anglers report a full day on the water. Draw depends on thrust, wind, current, and boat weight.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails open=\"\"\u003e\n\u003csummary\u003eDoes the Epoch 36V 50Ah replace three 12V trolling motor batteries?\u003c\/summary\u003e\n\u003cdiv class=\"lbs-faq-body\"\u003e\n\u003cp style=\"font-size: 18px;\"\u003eYes. In a compatible 36V system, this single 36V lithium battery replaces a traditional three-battery 12V lead-acid trolling motor bank, saving significant weight and space. Confirm your trolling motor voltage, charger compatibility, tray dimensions, and cable sizing before swapping out an existing bank.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails open=\"\"\u003e\n\u003csummary\u003eCan the Epoch 36V 50Ah start an outboard engine?\u003c\/summary\u003e\n\u003cdiv class=\"lbs-faq-body\"\u003e\n\u003cp style=\"font-size: 18px;\"\u003eNo. The Epoch 36V 50Ah Essential Series is a deep-cycle battery for trolling motors and compatible 36V power applications. It is not designed for engine cranking or outboard starting. For starting duty, choose a dedicated cranking or dual-purpose battery of the correct voltage.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails open=\"\"\u003e\n\u003csummary\u003eWhat charger do I need for the Epoch 36V 50Ah?\u003c\/summary\u003e\n\u003cdiv class=\"lbs-faq-body\"\u003e\n\u003cp style=\"font-size: 18px;\"\u003eUse a single-output 36V LiFePO4-compatible charger or a programmable lithium charger. Recommended settings are 42.6V to 43.2V bulk\/absorption, float disabled (preferred) or 40.0V to 40.8V, equalization disabled, and temperature compensation disabled. A charger around 15A to 25A suits this 50Ah battery.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails open=\"\"\u003e\n\u003csummary\u003eCan I use my existing onboard or multi-bank charger?\u003c\/summary\u003e\n\u003cdiv class=\"lbs-faq-body\"\u003e\n\u003cp style=\"font-size: 18px;\"\u003eOnly if it is a single-output 36V charger with a lithium profile. A multi-bank onboard charger built to charge three separate 12V batteries is not compatible with one 36V lithium battery, because it expects three individual 12V banks. Confirm your charger outputs 36V on a lithium setting before use.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails open=\"\"\u003e\n\u003csummary\u003eHow long does the Epoch 36V 50Ah take to charge?\u003c\/summary\u003e\n\u003cdiv class=\"lbs-faq-body\"\u003e\n\u003cp style=\"font-size: 18px;\"\u003eA 36V 15A lithium charger recharges a fully depleted battery in roughly 3.5 hours plus a short absorption stage. A larger charger, up to about 25A, shortens that time. Actual charge time depends on the charger, the starting state of charge, and temperature.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails open=\"\"\u003e\n\u003csummary\u003eCan I wire multiple Epoch 36V 50Ah batteries together?\u003c\/summary\u003e\n\u003cdiv class=\"lbs-faq-body\"\u003e\n\u003cp style=\"font-size: 18px;\"\u003eYes, in parallel only. You can wire up to four matched 3650A-H batteries in parallel to increase capacity: two make a 36V 100Ah bank and four make 200Ah. This model supports a maximum of one battery in series, so it cannot be combined to raise system voltage above 36V.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails open=\"\"\u003e\n\u003csummary\u003eIs the Epoch 36V 50Ah waterproof?\u003c\/summary\u003e\n\u003cdiv class=\"lbs-faq-body\"\u003e\n\u003cp style=\"font-size: 18px;\"\u003eIt is IP65 rated, meaning it is dust-tight and protected against low-pressure water jets, which suits wet decks, rain, and spray. It is not intended for submersion, pressure washing, or installation where standing water can collect around the battery, terminals, or wiring.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails open=\"\"\u003e\n\u003csummary\u003eWill the Epoch 36V 50Ah work with Minn Kota, Garmin, or Lowrance motors?\u003c\/summary\u003e\n\u003cdiv class=\"lbs-faq-body\"\u003e\n\u003cp style=\"font-size: 18px;\"\u003eIt is designed for compatible 36V trolling motor systems, including those commonly used with Minn Kota, Garmin, and Lowrance motors, when voltage and current requirements match. Its 100A continuous rating covers many 36V motors. Always confirm your motor manufacturer's battery requirements before installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails open=\"\"\u003e\n\u003csummary\u003eDoes the Epoch Bluetooth app require internet?\u003c\/summary\u003e\n\u003cdiv class=\"lbs-faq-body\"\u003e\n\u003cp style=\"font-size: 18px;\"\u003eNo. The Epoch app connects directly to the battery over Bluetooth, so you can view state of charge, voltage, current, and status while your phone is near the battery without a cellular or Wi-Fi connection. Internet is only needed to download the app initially.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails open=\"\"\u003e\n\u003csummary\u003eCan I monitor more than one battery in the app?\u003c\/summary\u003e\n\u003cdiv class=\"lbs-faq-body\"\u003e\n\u003cp style=\"font-size: 18px;\"\u003eThe Epoch app connects to compatible Epoch batteries over Bluetooth and can display battery data for connected units. If you run several batteries in parallel, check each battery's status individually in the app. Bluetooth range is limited, so stay within a short distance of the batteries.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails open=\"\"\u003e\n\u003csummary\u003eDoes internal self-heating mean I can charge in freezing conditions?\u003c\/summary\u003e\n\u003cdiv class=\"lbs-faq-body\"\u003e\n\u003cp style=\"font-size: 18px;\"\u003eThe built-in heating system supports charging in cold conditions when paired with a compatible charger, and the BMS includes low-temperature charge protection to prevent charging damage. Always follow Epoch charging guidance and avoid charging outside the approved temperature range.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails open=\"\"\u003e\n\u003csummary\u003eCan I charge the Epoch 36V 50Ah from solar?\u003c\/summary\u003e\n\u003cdiv class=\"lbs-faq-body\"\u003e\n\u003cp style=\"font-size: 18px;\"\u003eYes, through a 36V-capable MPPT solar charge controller programmed to the recommended lithium settings, including a 42.6V to 43.2V bulk\/absorption target and float disabled or set low. Confirm your controller supports a 36V lithium battery and can be programmed to these values.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails open=\"\"\u003e\n\u003csummary\u003eCan I charge it from my boat's alternator?\u003c\/summary\u003e\n\u003cdiv class=\"lbs-faq-body\"\u003e\n\u003cp style=\"font-size: 18px;\"\u003eThis battery is not designed for direct charging from a standard 12V boat alternator. Charge it with a single-output 36V lithium charger, or use an appropriately configured DC-DC charging solution designed to safely charge a 36V lithium battery. Verify voltage and current limits before connecting.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails open=\"\"\u003e\n\u003csummary\u003eCan I mix the Epoch 36V 50Ah with lead-acid batteries?\u003c\/summary\u003e\n\u003cdiv class=\"lbs-faq-body\"\u003e\n\u003cp style=\"font-size: 18px;\"\u003eNo. Do not wire this lithium battery together with lead-acid batteries in the same bank. Lithium and lead-acid have different voltage and charging characteristics, and mixing them can cause improper charging and reduced performance. Run this battery as its own 36V lithium bank.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails open=\"\"\u003e\n\u003csummary\u003eWhat happens if the BMS shuts the battery off?\u003c\/summary\u003e\n\u003cdiv class=\"lbs-faq-body\"\u003e\n\u003cp style=\"font-size: 18px;\"\u003eThe advanced BMS can disconnect the battery to protect it from conditions such as over-discharge, over-current, short circuit, or temperature extremes. When the protective condition clears, or after correct charging within the approved temperature range, the battery resumes normal operation. Repeated shutdowns usually indicate a wiring, load, charger, or temperature issue to correct.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails open=\"\"\u003e\n\u003csummary\u003eHow much does the Epoch 36V 50Ah weigh and what are its dimensions?\u003c\/summary\u003e\n\u003cdiv class=\"lbs-faq-body\"\u003e\n\u003cp style=\"font-size: 18px;\"\u003eThe Epoch 36V 50Ah weighs about 35 lbs and measures 13.0 in long by 6.8 in wide by 9.44 in high, matching a standard Group 31 marine footprint. That is a large reduction from a three-battery 12V lead-acid bank, which can weigh roughly 180 lbs or more.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails open=\"\"\u003e\n\u003csummary\u003eWhat is the warranty on the Epoch 36V 50Ah?\u003c\/summary\u003e\n\u003cdiv class=\"lbs-faq-body\"\u003e\n\u003cp style=\"font-size: 18px;\"\u003eThe Epoch 36V 50Ah carries an 11-year limited manufacturer warranty. Coverage is strongest in the early years and steps down over the term, and registration shortly after purchase is required for full coverage. Confirm the current warranty terms and registration window directly with Epoch when you register your battery.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails open=\"\"\u003e\n\u003csummary\u003eIs 50Ah enough for a full day of fishing?\u003c\/summary\u003e\n\u003cdiv class=\"lbs-faq-body\"\u003e\n\u003cp style=\"font-size: 18px;\"\u003eFor many weekend and tournament anglers, 50Ah of usable LiFePO4 energy supports a full day in moderate conditions, especially with spot-lock and intermittent motor use. Heavy wind, strong current, larger boats, and continuous high-thrust running shorten runtime. For demanding days, add batteries in parallel to increase capacity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails open=\"\"\u003e\n\u003csummary\u003eIs the Epoch 36V 50Ah worth the cost over lead-acid?\u003c\/summary\u003e\n\u003cdiv class=\"lbs-faq-body\"\u003e\n\u003cp style=\"font-size: 18px;\"\u003eCompared with a three-battery 12V lead-acid bank, the Epoch 36V 50Ah offers close to full usable capacity, a much lower weight of about 35 lbs, a flat discharge that holds thrust, a 4,000+ cycle life, and maintenance-free operation. Whether the higher upfront cost is worth it depends on how often you fish and how much you value weight savings and cycle life.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- ================= FAQPage JSON-LD ================= --\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Epoch Batteries","offers":[{"title":"Default Title","offer_id":48322269446402,"sku":"3650A-H","price":749.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0723\/3660\/5442\/files\/Epoch36V50AhEssentialSeries.webp?v=1786818091","url":"https:\/\/www.lithiumbatterysupply.com\/products\/epoch-36v-50ah-essential-lifepo4-battery","provider":"Lithium Battery Supply","version":"1.0","type":"link"}