{"product_id":"epoch-batteries-36v-50ah-essential-series-3650a-h","title":"Epoch Batteries 36V 50Ah Essential Series 3650A-H | LiFePO4 Battery (1.92kWh) | Group 31, Heated, Bluetooth","description":"\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eSpec Sheet \u0026amp; Manuals\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003cli\u003eShipping Information\u003c\/li\u003e\n\u003cli\u003eWhy Buy From Us\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cp\u003eThe Epoch 36V 50Ah Essential Series (3650A-H) is a 38.4V heated, Bluetooth-enabled LiFePO4 deep-cycle battery with 1.92kWh of stored energy in a BCI Group 31 case. Built for 36V trolling motors on bass boats, pontoons, skiffs and aluminum boats, one battery can replace a three-battery 12V lead-acid trolling-motor bank at about 35 lb.\u003c\/p\u003e\n\u003cp\u003eInternal heating supports charging down to -20°C (-4°F), a BMS-integrated shunt feeds accurate data to the Epoch Li-Ion app, and the IP65 case is dust-tight and protected against water jets. It is rated for 4,000+ cycles and backed by an 11-year limited manufacturer warranty when registered within 90 days of purchase.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e100A continuous output:\u003c\/strong\u003e 100A maximum continuous discharge (25A recommended) with a 130A peak for up to 10 seconds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplaces a three-battery bank:\u003c\/strong\u003e One 38.4V battery can replace three 12V lead-acid trolling-motor batteries in a 35 lb Group 31 case.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeated charging:\u003c\/strong\u003e At 0°C the BMS pauses charging while incoming charge current (at least 0.5A) powers heating pads; charging resumes automatically at 5°C (41°F).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBluetooth monitoring:\u003c\/strong\u003e The Epoch Li-Ion app shows state of charge, voltage, current, temperature and status from a BMS-integrated shunt with 0.2A accuracy.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIP65 rated:\u003c\/strong\u003e Dust-tight and protected against water jets for many trolling-motor, fishing-boat and outdoor marine installs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdvanced BMS:\u003c\/strong\u003e Protects against overcharge, over-discharge, over-current, short circuit and high and low temperature.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eParallel expansion:\u003c\/strong\u003e Up to 4 matched 3650A-H batteries in parallel (200Ah, 7.68kWh) for longer runtime.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4,000+ cycle life:\u003c\/strong\u003e No watering, acid service or routine lead-acid maintenance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eRecommended Charging Settings\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMaximum continuous charge current: 50A per battery, all charging sources combined\u003c\/li\u003e\n\u003cli\u003eRecommended charge current: 25A (0.5C)\u003c\/li\u003e\n\u003cli\u003ePeak charge current: 120A for up to 10 seconds\u003c\/li\u003e\n\u003cli\u003eBulk\/absorption: 42.6V-43.2V\u003c\/li\u003e\n\u003cli\u003eAbsorption end: charge current ≤ C\/20 (2.5A) or 15 minutes, whichever comes first\u003c\/li\u003e\n\u003cli\u003eFloat: disabled (preferred) or 40.0V-40.8V\u003c\/li\u003e\n\u003cli\u003eRe-bulk: 39.6V\u003c\/li\u003e\n\u003cli\u003eTemperature compensation: 0 mV\/°C (off)\u003c\/li\u003e\n\u003cli\u003eEqualization: disabled; no lead-acid equalization, desulfation or repair modes\u003c\/li\u003e\n\u003cli\u003eCharger temperature limit setting: 0°C to 55°C (32°F to 131°F), unless the charger has approved cold-charge logic\u003c\/li\u003e\n\u003cli\u003eBMS high voltage cutoff and SoC recalibration: 43.8V\u003c\/li\u003e\n\u003cli\u003eAlternators: a DC-to-DC charger programmed for LiFePO4 is highly recommended\u003c\/li\u003e\n\u003cli\u003eUse a LiFePO4 profile; do not use lead-acid, AGM or gel profiles\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eRuntime Planning\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eEpoch plans on 80% of nominal energy: about 1,536Wh (40Ah) per battery\u003c\/li\u003e\n\u003cli\u003eA 10A average draw gives about 4 hours; a steady 500W load about 3.1 hours\u003c\/li\u003e\n\u003cli\u003eThrust setting, motor efficiency, boat weight, wind, current and temperature change real-world results\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCompatible Accessories\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eEpoch 36V 15A LiFePO4 battery charger\u003c\/li\u003e\n\u003cli\u003eEpoch battery tray for 3650A-H (sold separately)\u003c\/li\u003e\n\u003cli\u003eLithium-compatible 36V onboard marine charger\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003eSuitable For:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e36V trolling motors\u003c\/li\u003e\n\u003cli\u003eBass and fishing boats\u003c\/li\u003e\n\u003cli\u003ePontoons, skiffs and aluminum boats\u003c\/li\u003e\n\u003cli\u003eReplacing a three-battery 12V trolling motor bank\u003c\/li\u003e\n\u003cli\u003eMarine electronics and 36V auxiliary loads\u003c\/li\u003e\n\u003cli\u003e36V RV, van and camper systems\u003c\/li\u003e\n\u003cli\u003eOff-grid solar and backup power (36V)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003ePlease Note:\u003c\/strong\u003e Deep-cycle only: not cranking-rated and not for engine or outboard starting.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlease Note:\u003c\/strong\u003e Do not connect in series; parallel only, up to 4.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlease Note:\u003c\/strong\u003e Size loads, conductors and overcurrent protection to the 100A continuous rating; the 130A rating applies for up to 10 seconds only.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlease Note:\u003c\/strong\u003e Not a drop-in for every Group 31 lead-acid or AGM installation: check tray fit, terminal clearance, cable size, overcurrent protection and charger profile.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlease Note:\u003c\/strong\u003e IP65 is not submersible: do not submerge, pressure-wash or mount where water can pool.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlease Note:\u003c\/strong\u003e The BMS does not replace a correctly rated fuse or DC breaker near the battery positive.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlease Note:\u003c\/strong\u003e Confirm the ratings on your battery label before raising a charger's current limit; earlier production may carry different ratings.\u003c\/p\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003eDimensions (L x W x H):\u003c\/span\u003e 13.0 x 6.8 x 9.44 in\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003eWeight:\u003c\/span\u003e 35 lb\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003eCell Configuration:\u003c\/span\u003e 12S\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003eChemistry:\u003c\/span\u003e LiFePO4\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003eVoltage:\u003c\/span\u003e 38.4V\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003eMax Charge Voltage:\u003c\/span\u003e 43.8V\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003eOperating Voltage Range:\u003c\/span\u003e 30.0 - 43.8V\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003eAh Capacity:\u003c\/span\u003e 50Ah\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003eMax Continuous Discharge Amps:\u003c\/span\u003e 100A (25A recommended)\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003eMax Charge Current Amps:\u003c\/span\u003e 50A (25A recommended); 120A peak for up to 10 Seconds\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003eMax Discharge Peak Current Amps:\u003c\/span\u003e 130A (up to 10 Seconds)\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003eSeries | Parallel:\u003c\/span\u003e Parallel only: Max (4) in Parallel (200Ah); do not connect in series\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003eCharge Temp Range:\u003c\/span\u003e -20°C (-4°F) \/ 55°C (131°F) (with heating)\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003eDischarge Temp Range:\u003c\/span\u003e -20°C (-4°F) \/ 60°C (140°F)\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003eStorage Temp:\u003c\/span\u003e 0°C (32°F) \/ 35°C (95°F) (recommended; max 12 Months)\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003eBMS Protection:\u003c\/span\u003e Over Voltage, Under Voltage, Over-Current, Short Circuit, Over Temperature, Under Temperature\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003eModel \/ SKU:\u003c\/span\u003e 3650A-H\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003eGroup Size:\u003c\/span\u003e BCI Group 31; verify fitment by dimensions\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003eCell Type:\u003c\/span\u003e Prismatic LiFePO4\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003eEnergy Stored:\u003c\/span\u003e 1.92kWh (1,920Wh), nominal\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003eRecommended Discharge Current:\u003c\/span\u003e 25A (0.5C)\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003eCurrent Sensing:\u003c\/span\u003e BMS-integrated shunt; 0.2A accuracy on discharge\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003eHeating System:\u003c\/span\u003e Tested to -20°C \/ -4°F; rated external ambient down to -40°C \/ -40°F\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003eCase Material:\u003c\/span\u003e ABS \/ PC blend, UL94-V0 flame rating\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003eEnclosure Protection:\u003c\/span\u003e IP65 per IEC 60529 — dust-tight, protected against water jets; not submersible\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003eTerminal Type:\u003c\/span\u003e M8 female\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003eTerminal Torque:\u003c\/span\u003e 8–12 N·m (71–106 in-lb)\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003eCycle Life:\u003c\/span\u003e 4,000+ cycles\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003eCell-Level Certifications:\u003c\/span\u003e UL 1642; IEC 62619:2022 (cells, not the complete battery assembly)\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003eProduct Compliance:\u003c\/span\u003e CE; RoHS; UN 38.3, Class 9\u003c\/p\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0251\/0484\/2798\/files\/Epoch_3650A-H_Spec_Sheet_V02.pdf?v=1791006372\" target=\"_blank\" title=\"Epoch Batteries 36V 50Ah Essential Series 3650A-H Spec Sheet\" rel=\"noopener noreferrer\"\u003e3650A-H Spec Sheet\u003c\/a\u003e\u003cbr\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0251\/0484\/2798\/files\/Epoch_3650A-H_User_Manual_Letter_V02.pdf?v=1791006372\" target=\"_blank\" title=\"Epoch Batteries 36V 50Ah Essential Series 3650A-H User Manual\" rel=\"noopener noreferrer\"\u003e3650A-H User Manual\u003c\/a\u003e\u003cbr\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0251\/0484\/2798\/files\/Epoch_3650A-H_Technical_Data_Sheet_V02.pdf?v=1791006372\" target=\"_blank\" title=\"Epoch Batteries 36V 50Ah Essential Series 3650A-H Technical Data Sheet\" rel=\"noopener noreferrer\"\u003e3650A-H Technical Data Sheet\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cu\u003eEpoch Batteries Limited Warranty\u003c\/u\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWarranty Period\u003c\/strong\u003e\u003cbr\u003e\n11-year limited manufacturer warranty; register within 90 days of purchase for full coverage\u003c\/p\u003e\n\n\u003cp\u003eEpoch Batteries-branded products are covered against qualifying defects in materials and workmanship for the applicable warranty period, subject to Epoch's model-specific remedy schedule and the terms of its warranty policy. Epoch-branded chargers carry a 2-year limited warranty and accessories (such as fuel gauges and voltage reducers) a 1-year limited warranty, from the original purchase date.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eRegistration\u003c\/strong\u003e\u003cbr\u003e\nRegister your battery with Epoch within 90 days of purchase for full warranty coverage. If it is not registered within that time, the warranty period begins from the battery's original manufacturing date. Proof of ownership is required for any claim, and coverage is non-transferable and applies only to the original purchaser.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eRemedy\u003c\/strong\u003e\u003cbr\u003e\nAfter inspection and testing, Epoch will provide the applicable remedy for a qualifying manufacturing defect: an approved repair, a replacement, or a comparable-product offer according to the model's schedule. Typical repair turnaround is 3–10 business days once the product is received.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eExclusions\u003c\/strong\u003e\u003cbr\u003e\nCoverage may be denied when a failure is caused by misuse, improper handling, installation or storage, or use outside the product's specifications. Examples include an unsecured battery; loose, corroded or improperly connected terminals; series or parallel connections beyond the manufacturer's recommendations; reverse polarity or short circuits; impact, fire or water submersion; storage above 140°F or below -40°F; prolonged storage fully discharged or batteries left uncharged for more than three months; poor crimps, undersized cables or damaged wiring; opened, modified or tampered products; and use in applications the battery was not designed for, including repeated engine starting on non-cranking models.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eObtaining Warranty Service\u003c\/strong\u003e\u003cbr\u003e\nStart a claim through the Epoch Batteries Warranty Portal with your model and serial number, proof of purchase, a description of the issue and supporting photos or videos. If approved, Epoch provides an RMA number and packing instructions. Do not ship a product without a valid RMA. The customer arranges and pays for shipment to Epoch, packaged in compliance with lithium battery shipping rules. Epoch Batteries can be reached at 1-888-501-1846 or support@epochbatteries.com.\u003c\/p\u003e\n\n\u003cp\u003eVisit \u003ca href=\"https:\/\/www.epochbatteries.com\/pages\/11-year-warranty\" target=\"_blank\" title=\"Epoch Batteries Warranty\" rel=\"noopener noreferrer\"\u003eEpoch's Warranty Page\u003c\/a\u003e to review the full warranty terms.\u003c\/p\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cp\u003eShipping is typically through freight carriers and the actual shipping time is contingent on your location and the specific warehouse dispatching your order. Please allow for a 1-3 business day processing period before shipment, and an estimated delivery time of up to 7 business days. Your confirmation email will include delivery details and we will send you a tracking number as soon as one is available. If you ordered several separate items, you may receive multiple tracking numbers. Once the item has been shipped, the freight service will contact you to coordinate the date and time of delivery. If you require any special accommodations during delivery please let us know as soon as possible and let the delivery company know when arranging the appointment.\u003c\/p\u003e\n\u003cp\u003eTypically, orders will be dropped off either curbside or outside your front door or garage. It is your responsibility to bring the order inside or to its final destination and to remove any existing items.\u003c\/p\u003e\n\u003cp\u003eDepending on the item, parts may be shipped in multiple boxes, and assembly may be required. When your order is delivered, please check that you have all pieces of the item and that nothing is damaged. If your order is damaged during transit and external damage is visible, note the damage immediately, write it on the delivery documents, take photos and\/or videos, and refuse shipment. If there is no visible external damage, accept the package but note “\u003ci\u003esubject to concealed damage\u003c\/i\u003e” on the delivery documents. Any damage upon delivery needs to be reported within 24 hours of delivery or you may not be eligible for a refund. For additional information on submitting claims, as well as incorrect item exchanges, and replacements, please see our \u003ca href=\"https:\/\/ecoemperor.com\/policies\/refund-policy\" target=\"_blank\" title=\"Eco Emperor Returns and Refunds Policy\" rel=\"noopener noreferrer\"\u003eRefund Policy\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eFor more information about shipping, please visit our complete \u003ca href=\"https:\/\/ecoemperor.com\/policies\/shipping-policy\" target=\"_blank\" title=\"Eco Emperor Shipping Policy\" rel=\"noopener noreferrer\"\u003eShipping Policy\u003c\/a\u003e.\u003c\/p\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWhy Shop With Eco Emperor?\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eAt Eco Emperor, our mission is to empower you to lead a sustainable and fun lifestyle with ease and confidence. Whether you're upgrading your outdoor experience or enhancing your eco-conscious journey, here’s why choosing us is a decision you can feel great about:\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eExpert and Customized Care\u003c\/strong\u003e\u003cbr\u003e\nOur knowledgeable and friendly team is here to support you every step of the way. We pride ourselves on providing personalized service and swift responses to ensure a smooth and satisfying experience. Our dedicated team is available via phone, email, and live chat to provide you with prompt and helpful support.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eAuthorized Retailer of High-Quality, Trusted Products from Leading Brands\u003c\/strong\u003e\u003cbr\u003e\nWe partner with the best brands in the industry to bring you reliable, high-quality products. As authorized retailers, we guarantee authenticity and offer full manufacturer warranties on every item. You can trust that our products are built to last and perform efficiently.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFree \u0026amp; Fast Shipping\u003c\/strong\u003e\u003cbr\u003e\nWe know you’re eager to begin your new products or start your next outdoor adventure. That’s why we prioritize quick, reliable, and free shipping to get your orders to you on time and in perfect condition.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCompetitive Pricing\u003c\/strong\u003e\u003cbr\u003e\nWe believe that sustainable living should be accessible to everyone. We offer competitive pricing on all our products, so you can enjoy high-quality eco-friendly solutions and outdoor products without breaking the bank.\u003c\/p\u003e\n\n\u003cp\u003eChoose Eco Emperor for all your outdoor and eco-friendly product needs, and become part of a movement that’s embracing a more sustainable and adventurous lifestyle.\u003c\/p\u003e\n\n\u003cp\u003eThank you for supporting a greener, cleaner future, while enhancing your outdoor experiences and powering your adventures.💚\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"Epoch Batteries","offers":[{"title":"Default Title","offer_id":50820170187055,"sku":"3650A-H","price":749.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0806\/0803\/5119\/files\/Epoch-Batteries-36V-50Ah-Essential-Series-1.png?v=1791162085","url":"https:\/\/ecoemperor.com\/products\/epoch-batteries-36v-50ah-essential-series-3650a-h","provider":"Eco Emperor","version":"1.0","type":"link"}