{"product_id":"fortress-power-eflex-max-5-4-51-2v-5-4kwh-lfp-lithium-battery","title":"Fortress Power eFlex MAX 5.4 51.2V 5.4kWh LFP Lithium Battery","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThe Fortress Power eFlex MAX 5.4 is a premium Tier-1 automotive-grade lithium iron phosphate battery engineered to deliver world-class performance across the widest range of application scenarios and harsh weather conditions, combining industry-leading thermal management, a robust IP65 anodized aluminum enclosure, and a market-leading digital processor BMS in a single, versatile energy storage unit.\u003c\/p\u003e \u003ch3 class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/h3\u003e \u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e \u003cli class=\"whitespace-normal break-words pl-2\"\u003e \u003cstrong\u003eTier-1 Automotive Prismatic LFP Cell with 8,000-Cycle Life at 80% DoD:\u003c\/strong\u003e Built with the highest cycle-life prismatic lithium iron phosphate cells in the industry, delivering long-term reliability and consistent performance across thousands of charge and discharge cycles.\u003c\/li\u003e \u003cli class=\"whitespace-normal break-words pl-2\"\u003e \u003cstrong\u003ePatented Anodized Aluminum Enclosure with 4x Better Thermal Performance:\u003c\/strong\u003e The eFlex MAX's patented enclosure design achieves four times better thermal performance than competing products, ensuring optimal battery health in extreme heat and cold environments.\u003c\/li\u003e \u003cli class=\"whitespace-normal break-words pl-2\"\u003e \u003cstrong\u003eIP65 Dust and Waterproof Rating for Indoor and Outdoor Installations:\u003c\/strong\u003e Fully sealed against dust and water ingress, the eFlex MAX is built for confident installation in garages, basements, utility rooms, and fully exposed outdoor environments.\u003c\/li\u003e \u003cli class=\"whitespace-normal break-words pl-2\"\u003e \u003cstrong\u003eMarket-Leading Digital Processor BMS with CAN, Modbus, and OTA Updates:\u003c\/strong\u003e The integrated BMS features individual cell voltage and temperature monitoring, cell balancing, 125A integrated breaker, remote monitoring, and advanced closed-loop communication with most 48V inverters.\u003c\/li\u003e \u003cli class=\"whitespace-normal break-words pl-2\"\u003e \u003cstrong\u003eScalable Up to 86.4kWh — Up to 16 Units in Parallel:\u003c\/strong\u003e Start with a single 5.4kWh module and expand to a maximum of 16 units in parallel for a total system capacity of 86.4kWh without system redesign.\u003c\/li\u003e \u003c\/ul\u003e \u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThe Fortress Power eFlex MAX 5.4 sets a new benchmark for residential and light commercial lithium battery storage. Its patented enclosure design delivers thermal performance that no competitor in its class can match, while the Tier-1 automotive prismatic LFP cells ensure that every charge cycle is performed with maximum efficiency and minimum degradation over the life of the system.\u003c\/p\u003e \u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eWith a minimal idle consumption of just 2W and an efficiency rating of over 98% at 0.5C, the eFlex MAX wastes virtually nothing. Its advanced digital processor BMS provides individual cell-level monitoring and balancing, ensuring every cell performs at its peak and the battery pack remains balanced throughout its entire service life. OTA firmware updates keep the BMS current without requiring a technician on site.\u003c\/p\u003e \u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cem\u003e\u003cstrong\u003eNote: Wall mount bracket and busbar are not included with this listing. Communication cables and eFlex MAX Top Cover are included.\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e \u003ch3 class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eTechnical Specifications\u003c\/h3\u003e \u003cdiv class=\"overflow-x-auto w-full px-2 mb-6\"\u003e \u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e \u003cthead class=\"text-left\"\u003e \u003ctr\u003e \u003cth scope=\"col\" class=\"text-text-100 border-b-0.5 border-border-300\/60 py-2 pr-4 align-top font-bold\"\u003eSpecification\u003c\/th\u003e \u003cth scope=\"col\" class=\"text-text-100 border-b-0.5 border-border-300\/60 py-2 pr-4 align-top font-bold\"\u003eeFlex MAX 5.4\u003c\/th\u003e \u003c\/tr\u003e \u003c\/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003eELECTRICAL\u003c\/strong\u003e\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eNominal Voltage\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e51.2V\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eNominal Capacity\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e105 Ah\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eRated Capacity @ 0.5C\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e5.374 kWh\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eResistance\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u0026lt;10 mΩ\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eEfficiency @ 0.5C\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u0026gt;98%\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eSelf-Discharge\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u0026lt;1% per Month\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eDepth of Discharge\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eUp to 100%\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eMaximum Units in Parallel\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e16 (86.4kWh)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003eCHARGE\u003c\/strong\u003e\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eRecommended Charge Current\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u0026lt;55A\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eMaximum Charge Current\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e100A\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eRecommended Charge Voltage\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e54.4V\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eBMS Charge Voltage Disconnect\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u0026gt;56V\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eBulk \/ Absorb Charge\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e54.4V\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eFloat Charge\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e54V\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eAbsorb Time\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e60 Minutes\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003eDISCHARGE\u003c\/strong\u003e\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eRecommended Continuous Discharge\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e60A (3kW DC)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003ePeak Continuous Discharge\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e100A (5kW \/ 60 Min)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eMaximum Surge Power Rate\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e125A (6.6kW \/ 5s)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eRecommended Low Voltage Disconnect\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e48V\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eBattery Low Voltage Protection\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u0026lt;45V\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eBattery Recovery Voltage\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e45V\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eFault Current\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e3000A, 5ms\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003eTEMPERATURE\u003c\/strong\u003e\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eDischarge Temperature\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e-4°F to 131°F (-20°C to 55°C)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eCharge Temperature\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e32°F to 114°F (0°C to 45°C)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eStorage Temperature\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e20°F to 95°F (-6°C to 35°C)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003eMECHANICAL\u003c\/strong\u003e\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eDimensions (L x W x H)\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e17.5 x 7.2 x 24.2 in\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eWeight\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e108 lbs\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eCase Material\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eAnodized Aluminum\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eEnclosure Protection\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eIP65\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eCell Type\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eTier-1 Automotive Prismatic LiFePO4\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eTerminal Type\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eM8\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eRing Terminal Size\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e3\/8 in or Larger\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eTerminal Torque\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e7.0–7.7 Nm (5.1–5.7 ft-lb)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eTerminal Cover\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e1 Set, Waterproof\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eMounting Options\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eFloor-Stand, 19-in Server Rack (Wall Mount Sold Separately)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003eBMS\u003c\/strong\u003e\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eIntegrated Breaker\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e125A\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eCell Monitoring\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eIndividual Voltage and Temperature\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eCommunication\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eCAN Bus \/ Modbus \/ OTA Firmware\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eIdle Consumption\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e2W\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003eINCLUDED IN BOX\u003c\/strong\u003e\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eCommunication Cables\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eIncluded\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eeFlex MAX Top Cover\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eIncluded\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eWall Mount Bracket\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eNot Included\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eBusbar\u003c\/td\u003e \u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eNot Included\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003c\/div\u003e","brand":"Fortress Power","offers":[{"title":"Default Title","offer_id":67624155185306,"sku":"FP-EFLEXMAX-5.4","price":923.01,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0773\/9568\/9626\/files\/eFlexMAXFront.webp?v=1790784057","url":"https:\/\/coretarps.co.uk\/products\/fortress-power-eflex-max-5-4-51-2v-5-4kwh-lfp-lithium-battery","provider":"ELMBER TRADE LTD","version":"1.0","type":"link"}