{"product_id":"bigbattery-ethos-home-lithium-battery-backup-48v-5-1kwh-ul1973-ul9540a","title":"BigBattery ETHOS Home Lithium Battery Backup | 48V – 5.1kWh | UL1973 | UL9540A","description":"\u003ch2\u003eThe BigBattery ETHOS 48V Lithium Battery Provides Reliable Grid-Tied Whole-Home Backup Power Without the Noise, Fuel, or Maintenance\u003c\/h2\u003e\n\u003cp\u003eWhether you're preparing for grid outages, lowering energy costs, or building a complete off-grid power system, the BigBattery ETHOS™ gives you dependable energy storage you can trust day after day. Built with safe LiFePO4 battery technology, advanced UL-certified protection, and expandable capacity up to 80+ kWh, ETHOS is designed to grow with your energy needs while delivering reliable, maintenance-free performance.\u003c\/p\u003e\n\u003cp\u003eWith seamless compatibility across leading inverter platforms like EG4 and BigBattery APEX systems, ETHOS integrates easily into both grid-tied and off-grid applications. Its plug-and-play modular design helps simplify installation, while the advanced battery management system protects against voltage, current, and temperature issues for worry-free operation year after year.\u003c\/p\u003e\n\u003cp\u003eEngineered in the USA and backed by a 12-year warranty with lifetime U.S.-based technical support, the ETHOS platform is built for real-world performance in demanding environments. Whether you're preparing for outages, reducing reliance on the grid, or building a complete solar energy ecosystem, ETHOS gives you the confidence to power what matters most.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003eBigBattery ETHOS 48V Battery Features\u003c\/h3\u003e\n\u003ch4\u003eSafe \u0026amp; Long-Lasting LiFePO4 Battery Chemistry So You Can Power Your Home With Confidence\u003c\/h4\u003e\n\u003cp\u003eEnjoy dependable backup power with advanced lithium iron phosphate technology designed for superior safety, thermal stability, and long service life. ETHOS batteries are built to provide reliable daily performance for home backup, solar storage, and off-grid applications without the maintenance concerns of older battery technologies.\u003c\/p\u003e\n\u003ch4\u003eExpandable Up to 80+ kWh So Your System Can Grow With Your Energy Needs\u003c\/h4\u003e\n\u003cp\u003eStart with the capacity you need today and expand your system over time without replacing existing equipment. The modular ETHOS platform makes it easy to scale from essential backup power to large whole-home energy storage systems as your needs evolve.\u003c\/p\u003e\n\u003ch4\u003e6,000+ Cycle Life So You Can Depend on Years of Reliable Backup Power\u003c\/h4\u003e\n\u003cp\u003eDesigned for long-term daily use, ETHOS delivers exceptional lifespan and long-term value. With over 6,000 charge cycles, you can confidently rely on your system for backup power, solar energy storage, and energy independence for years to come.\u003c\/p\u003e\n\u003ch4\u003eAdvanced Battery Management Protection So Your System Stays Safe and Optimized\u003c\/h4\u003e\n\u003cp\u003eThe integrated smart BMS continuously monitors voltage, current, and temperature to help protect your investment and optimize performance. This advanced protection system helps ensure safe, stable operation in a wide range of conditions.\u003c\/p\u003e\n\u003ch4\u003eUL 9540 Certification So You Can Install With Greater Peace of Mind\u003c\/h4\u003e\n\u003cp\u003eETHOS is engineered to meet rigorous safety standards for residential energy storage applications. UL 9540 certification provides added confidence for homeowners and installers seeking reliable, code-compliant battery backup solutions.\u003c\/p\u003e\n\u003ch4\u003eSeamless Inverter Compatibility So You Can Build the System You Want\u003c\/h4\u003e\n\u003cp\u003eDesigned for compatibility with popular inverter platforms including EG4 and BigBattery APEX systems, ETHOS simplifies system design and installation for both grid-tied and off-grid applications.\u003c\/p\u003e\n\u003ch4\u003eFast Plug-and-Play Installation So You Can Get Up and Running Faster\u003c\/h4\u003e\n\u003cp\u003eThe modular stackable design and simplified connections help streamline installation while reducing setup time. Whether installed indoors or outdoors, ETHOS is engineered for clean, efficient deployment in real-world environments.\u003c\/p\u003e\n\u003ch4\u003e12-Year Warranty and Lifetime U.S. Support So You’re Covered for the Long Haul\u003c\/h4\u003e\n\u003cp\u003eInvest with confidence knowing your battery system is backed by long-term warranty protection and lifetime access to U.S.-based technical support. When questions arise, expert help is readily available.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eBigBattery ETHOS Home Lithium Battery Backup Warranty\u003c\/h3\u003e\n\u003cp\u003eBigBattery provides a limited 12-year warranty policy, ensuring the absence of defects in materials, workmanship, and performance during the warranty period.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"border-collapse: collapse; max-width: 100%; overflow-x: auto;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth style=\"background-color: rgb(242, 242, 242); text-align: left;\" colspan=\"2\"\u003e\n\u003ch3\u003eBigBattery ETHOS Home Lithium Battery Specifications\u003c\/h3\u003e\n\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003ch4\u003eBattery Specifications\u003c\/h4\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eGTIN-12 (U.P.C.)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e850061252005\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSystem Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e48V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNominal Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e51.2V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eChemistry\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLiFePO4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ekWh Capacity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10.24kWh (2x), 15.36kWh (3x), 20.48kWh (4x), 30.72kWh (6x), 40.96kWh (8x), 46.08kWh (9x)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAh Capacity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e200Ah\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCharging Voltage Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e55.6 – 57V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMax Charge Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e57V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Voltage Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e48 – 57V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSuggested Low Voltage Cutoff\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e48 – 50.8V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBMS Cutoff Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e42 – 47V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCell Configuration\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e16S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMax Continuous Discharge Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e200A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMax Continuous Power\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10240W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMax Discharge Peak Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e300A (Max 5 seconds)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMax Charge Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e200A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003ch4\u003eTemperature Specifications\u003c\/h4\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCharge Temperature Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e32°F – 113°F (0°C – 45°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDischarge Temperature Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-4°F – 140°F (-20°C – 60°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOptimal Discharge Temperature Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e59°F – 95°F (15°C – 35°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStorage Temperature Range (SoC \u0026gt;50%)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-4°F – 113°F (-20°C – 45°C) (Max 6 months)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003ch4\u003eMechanical Specifications\u003c\/h4\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e273 lb (123.8 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDepth\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e6.7 in (170 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWidth\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e26.5 in (674 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e43.3 in (1100 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMax Connections\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUp to (16) parallel connections per control box\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProtection Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eIP65 \/ NEMA 4X\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003ch4\u003eCommunication \u0026amp; Certifications\u003c\/h4\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCommunications\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCANBus \/ RS485\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCertifications\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUL9540, UL9540A, UL1973, \u0026amp; UN38.3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eBigBattery ETHOS 48V Battery Manual \u0026amp; Downloads\u003c\/h3\u003e\n\u003ch4\u003eBigBattery ETHOS 48V Battery Spec Sheet\u003c\/h4\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0643\/9128\/2937\/files\/BigBattery_ETHOS_48V_Battery_Spec_Sheet.pdf?v=1778808083\" title=\"BigBattery ETHOS 48V Battery Spec Sheet\" rel=\"noopener\" target=\"_blank\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0643\/9128\/2937\/files\/BigBattery_ETHOS_48V_Battery_Spec_Sheet_100x100.jpg?v=1778808073\" alt=\"BigBattery_ETHOS_48V_Battery_Spec_Sheet\" style=\"float: none;\"\u003e\u003c\/a\u003e\u003c\/div\u003e\n\u003ch4 style=\"text-align: left;\"\u003eBigBattery ETHOS 48V Battery Manual\u003c\/h4\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003ca rel=\"noopener\" title=\"BigBattery ETHOS 48V Battery Manual\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0643\/9128\/2937\/files\/BigBattery_ETHOS_48V_Battery_Manual.pdf?v=1778808194\" target=\"_blank\"\u003e\u003cimg style=\"margin-bottom: 16px; float: none;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0643\/9128\/2937\/files\/BigBattery_ETHOS_48V_Battery_Manual_100x100.jpg?v=1778808170\"\u003e\u003c\/a\u003e\u003c\/div\u003e\n\u003ch4 style=\"text-align: left;\"\u003eUL9540A Certificate\u003c\/h4\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0643\/9128\/2937\/files\/UL9540A_Certificate.pdf?v=1778808279\" title=\"UL9540A Certificate\" rel=\"noopener\" target=\"_blank\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0643\/9128\/2937\/files\/UL9540A_Certificate_100x100.jpg?v=1778808259\" style=\"margin-bottom: 16px; float: none;\"\u003e\u003c\/a\u003e\u003c\/div\u003e\n\u003ch4 style=\"text-align: left;\"\u003eUL1973 Certificate\u003c\/h4\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0643\/9128\/2937\/files\/UL1973_Certificate.pdf?v=1778808383\" title=\"UL1973 Certificate\" rel=\"noopener\" target=\"_blank\"\u003e\u003cimg alt=\"UL1973_Certificate\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0643\/9128\/2937\/files\/UL1973_Certificate_100x100.jpg?v=1778808373\" style=\"margin-bottom: 16px; float: none;\"\u003e\u003c\/a\u003e\u003c\/div\u003e\n\u003ch4 style=\"text-align: left;\"\u003eUN38.3 Certificate\u003c\/h4\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0643\/9128\/2937\/files\/UN38.3_Certificate.pdf?v=1778808476\" title=\"UN38.3 Certificate\" rel=\"noopener\" target=\"_blank\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0643\/9128\/2937\/files\/UN38.3_Certificate_100x100.jpg?v=1778808467\" alt=\"UN38.3_Certificate\" style=\"margin-bottom: 16px; float: none;\"\u003e\u003c\/a\u003e\u003c\/div\u003e\n\u003ch4 style=\"text-align: left;\"\u003eSafety Data Sheet\u003c\/h4\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003ca rel=\"noopener\" title=\"Safety Data Sheet\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0643\/9128\/2937\/files\/Safety_Data_Sheet.pdf?v=1778808591\" target=\"_blank\"\u003e\u003cimg style=\"margin-bottom: 16px; float: none;\" alt=\"Safety_Data_Sheet\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0643\/9128\/2937\/files\/Safety_Data_Sheet_100x100.jpg?v=1778808576\"\u003e\u003c\/a\u003e\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"BigBattery","offers":[{"title":"1 x ETHOS Battery | 5.12kWh","offer_id":48403342033145,"sku":"FETHS-48051-G1","price":1290.0,"currency_code":"USD","in_stock":true},{"title":"2 x ETHOS Batteries | 10.24kWh","offer_id":48403342065913,"sku":"K0949","price":2990.0,"currency_code":"USD","in_stock":true},{"title":"3 x ETHOS Batteries | 15.36kWh","offer_id":48403342098681,"sku":"K0950","price":4250.0,"currency_code":"USD","in_stock":true},{"title":"4 x ETHOS Batteries | 20.48kWh","offer_id":48403342131449,"sku":"K0951","price":5550.0,"currency_code":"USD","in_stock":true},{"title":"6 x ETHOS Batteries | 30.72kWh","offer_id":48403342164217,"sku":"K0953","price":8100.0,"currency_code":"USD","in_stock":true},{"title":"8 x ETHOS Batteries | 40.96kWh","offer_id":48403597754617,"sku":"OP-FETHS-48051-G1-8","price":11095.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0643\/9128\/2937\/files\/BigBattery_ETHOS_48V_5.12kWh_Battery_Module.jpg?v=1776126449","url":"https:\/\/outboundpower.com\/products\/bigbattery-ethos-home-lithium-battery-backup-48v-5-1kwh-ul1973-ul9540a","provider":"Outbound Power","version":"1.0","type":"link"}