{"product_id":"bigbattery-ethos-battery-expansion-kit-2x-or-3x-modules-48v-lifepo4-energy-storage-upgrade","title":"BigBattery ETHOS Battery Expansion Kit (2x or 3x Modules) – 48V LiFePO4 Energy Storage Upgrade","description":"\u003cp data-start=\"399\" data-end=\"923\"\u003eThe \u003cstrong data-start=\"403\" data-end=\"437\"\u003eBigBattery ETHOS Expansion Kit\u003c\/strong\u003e allows you to easily increase the capacity of your existing ETHOS 48V energy storage system. Designed for seamless integration, this expansion kit adds additional ETHOS 5.12kWh stackable lithium battery modules, enabling homeowners and installers to scale their solar energy storage without replacing their existing system. Choose between the 2-module (10.24kWh) or 3-module (15.36kWh) configuration to match your power requirements. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"925\" data-end=\"1522\"\u003eBuilt with LiFePO4 (Lithium Iron Phosphate) battery technology, the ETHOS expansion kits provide exceptional safety, long cycle life, and reliable performance for residential solar, off-grid installations, and backup power systems. Each kit includes battery modules, rack base, and communication cables needed to connect additional storage to your ETHOS control box. With IP65 protection, CANBus\/RS485 communication, and support for up to 16 parallel connections, the ETHOS platform provides a scalable and future-ready home energy storage solution.\u003c\/p\u003e\n\u003ch3 data-end=\"1603\" data-start=\"1589\" data-section-id=\"u0ybrq\"\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-section-id=\"1aazv3p\" data-start=\"1544\" data-end=\"1645\"\u003e\n\u003cstrong data-start=\"1546\" data-end=\"1575\"\u003eExpandable Energy Storage\u003c\/strong\u003e – Add additional ETHOS battery modules to increase system capacity.\u003c\/li\u003e\n\u003cli data-section-id=\"1694ghq\" data-start=\"1646\" data-end=\"1792\"\u003e\n\u003cstrong data-start=\"1648\" data-end=\"1672\"\u003eTwo Capacity Options\u003c\/strong\u003e – Available in \u003cstrong data-start=\"1688\" data-end=\"1705\"\u003e2x (10.24kWh)\u003c\/strong\u003e or \u003cstrong data-start=\"1709\" data-end=\"1726\"\u003e3x (15.36kWh)\u003c\/strong\u003e expansion configurations. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1gi1s9h\" data-start=\"1793\" data-end=\"1911\"\u003e\n\u003cstrong data-start=\"1795\" data-end=\"1833\"\u003eAdvanced LiFePO4 Battery Chemistry\u003c\/strong\u003e – Safer lithium technology with long cycle life and high thermal stability.\u003c\/li\u003e\n\u003cli data-section-id=\"7e980a\" data-start=\"1912\" data-end=\"2003\"\u003e\n\u003cstrong data-start=\"1914\" data-end=\"1945\"\u003e48V Energy Storage Platform\u003c\/strong\u003e – Ideal for residential solar and hybrid power systems.\u003c\/li\u003e\n\u003cli data-section-id=\"whh0fa\" data-start=\"2004\" data-end=\"2095\"\u003e\n\u003cstrong data-start=\"2006\" data-end=\"2036\"\u003eSeamless ETHOS Integration\u003c\/strong\u003e – Designed to connect directly to the ETHOS control box.\u003c\/li\u003e\n\u003cli data-section-id=\"1gsx6yc\" data-start=\"2096\" data-end=\"2197\"\u003e\n\u003cstrong data-start=\"2098\" data-end=\"2130\"\u003eHigh Continuous Power Output\u003c\/strong\u003e – Supports demanding home backup and solar storage applications.\u003c\/li\u003e\n\u003cli data-section-id=\"1hubf9e\" data-start=\"2198\" data-end=\"2293\"\u003e\n\u003cstrong data-start=\"2200\" data-end=\"2233\"\u003eIP65 Weather-Resistant Design\u003c\/strong\u003e – Suitable for indoor or protected outdoor installations.\u003c\/li\u003e\n\u003cli data-section-id=\"tjvjjb\" data-start=\"2294\" data-end=\"2382\"\u003e\n\u003cstrong data-start=\"2296\" data-end=\"2319\"\u003eSmart Communication\u003c\/strong\u003e – CANBus and RS485 compatibility for inverter communication.\u003c\/li\u003e\n\u003cli data-section-id=\"onmbkg\" data-start=\"2383\" data-end=\"2512\"\u003e\n\u003cstrong data-start=\"2385\" data-end=\"2411\"\u003eScalable System Design\u003c\/strong\u003e – Supports up to \u003cstrong data-start=\"2429\" data-end=\"2471\"\u003e16 battery connections per control box\u003c\/strong\u003e. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"138cqvo\" data-start=\"2513\" data-end=\"2621\"\u003e\n\u003cstrong data-start=\"2515\" data-end=\"2535\"\u003e12-Year Warranty\u003c\/strong\u003e – Long-term reliability backed by BigBattery.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"3894\" data-start=\"3877\" data-section-id=\"1m8mqxq\"\u003e\u003cstrong\u003eINCLUDED IN KIT\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-end=\"3664\" data-start=\"3638\" data-section-id=\"5dtgfa\"\u003e\u003cstrong\u003eETHOS 2x Expansion Kit\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli style=\"list-style-type: none;\"\u003e\n\u003cul data-end=\"3832\" data-start=\"3665\"\u003e\n\u003cli data-end=\"3712\" data-start=\"3665\" data-section-id=\"zq2voy\"\u003e(2) FETHS-48051-G1 - 5.12kWh ETHOS Battery Module\u003cbr\u003e(1) CNT081 - ETHOS Stack Base\u003cbr\u003e(2) ETHOS Stack-to-Stack Power Cable Pair 4.9 ft (1500mm)\u003cbr\u003e(1) ETHOS Stack-to-Stack Comm Cable 4.9 ft (1500mm)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"3860\" data-start=\"3834\" data-section-id=\"1dvln9j\"\u003e\u003cstrong\u003eETHOS 3x Expansion Kit\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli style=\"list-style-type: none;\"\u003e\n\u003cul data-end=\"4028\" data-start=\"3861\"\u003e\n\u003cli data-end=\"3908\" data-start=\"3861\" data-section-id=\"qk2n2r\"\u003e(3) FETHS-48051-G1 - 5.12kWh ETHOS Battery Module\u003cbr\u003e(1) CNT081 - ETHOS Stack Base\u003cbr\u003e(2) ETHOS Stack-to-Stack Power Cable Pair 4.9 ft (1500mm)\u003cbr\u003e(1) ETHOS Stack-to-Stack Comm Cable 4.9 ft (1500mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eVariant\u003c\/th\u003e\n\u003cth\u003eBattery Modules\u003c\/th\u003e\n\u003cth\u003eTotal Capacity\u003c\/th\u003e\n\u003cth\u003eAmp Hours\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eETHOS 2x Expansion Kit\u003c\/td\u003e\n\u003ctd\u003e2 × 5.12kWh modules\u003c\/td\u003e\n\u003ctd\u003e10.24kWh\u003c\/td\u003e\n\u003ctd\u003e200Ah\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eETHOS 3x Expansion Kit\u003c\/td\u003e\n\u003ctd\u003e3 × 5.12kWh modules\u003c\/td\u003e\n\u003ctd\u003e15.36kWh\u003c\/td\u003e\n\u003ctd\u003e300Ah\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Voltage\u003c\/td\u003e\n\u003ctd\u003e48V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd\u003e51.2V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery Chemistry\u003c\/td\u003e\n\u003ctd\u003eLiFePO4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCapacity Options\u003c\/td\u003e\n\u003ctd\u003e10.24kWh \/ 15.36kWh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCharging Voltage Range\u003c\/td\u003e\n\u003ctd\u003e55.6 – 57V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage Range\u003c\/td\u003e\n\u003ctd\u003e48 – 57V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Charge Current\u003c\/td\u003e\n\u003ctd\u003e200A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Continuous Discharge Current\u003c\/td\u003e\n\u003ctd\u003e200A – 250A (depending on configuration)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePeak Discharge Current\u003c\/td\u003e\n\u003ctd\u003e300A (5 seconds)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Continuous Power\u003c\/td\u003e\n\u003ctd\u003eUp to 12.8kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication\u003c\/td\u003e\n\u003ctd\u003eCANBus \/ RS485\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection Rating\u003c\/td\u003e\n\u003ctd\u003eIP65 \/ NEMA 4X\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCharge Temperature\u003c\/td\u003e\n\u003ctd\u003e0°C – 45°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDischarge Temperature\u003c\/td\u003e\n\u003ctd\u003e−20°C – 60°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Parallel Systems\u003c\/td\u003e\n\u003ctd\u003eUp to 16 per control box\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd\u003eUL9540A, UL1973, UN38.3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eDownloads\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0814\/0822\/9588\/files\/ETHOS-NEW-SpecSheet-1.5-BatteryCB.pdf?v=1773300964\" rel=\"noopener\" target=\"_blank\"\u003e\u003cspan\u003eSpec Sheet\u003c\/span\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0814\/0822\/9588\/files\/White-Cover-ETHOS-BATTERY-USER-MANUAL-4.pdf?v=1773300968\" rel=\"noopener\" target=\"_blank\"\u003e\u003cspan\u003eUser Manual\u003c\/span\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0814\/0822\/9588\/files\/SDS_BigBattery_LFP-1.pdf?v=1773301002\" rel=\"noopener\" target=\"_blank\"\u003e\u003cspan\u003eSafety Data Sheet\u003c\/span\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0814\/0822\/9588\/files\/UL9540A-Certificate-1.pdf?v=1773301116\" rel=\"noopener\" target=\"_blank\"\u003e\u003cspan\u003eUL9540A Certificate\u003c\/span\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0814\/0822\/9588\/files\/UL1973-ETHOS.pdf?v=1773301133\" rel=\"noopener\" target=\"_blank\"\u003e\u003cspan\u003eUL1973 Certificate\u003c\/span\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0814\/0822\/9588\/files\/48V-ETHOS-DOC-UN38.3.pdf?v=1773301182\"\u003e\u003cspan\u003eUN38.3 Certificate\u003c\/span\u003e\u003c\/a\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"BigBattery","offers":[{"title":"ETHOS 2x Expansion Kit","offer_id":47644928016596,"sku":"K0698","price":2550.0,"currency_code":"USD","in_stock":true},{"title":"ETHOS 3x Expansion Kit","offer_id":47644928049364,"sku":"K0699","price":3850.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0814\/0822\/9588\/files\/Ethos-Parallel-Expansion-KIT0698_v2.png?v=1773383602","url":"https:\/\/sitereadysupply.com\/products\/bigbattery-ethos-battery-expansion-kit-2x-or-3x-modules-48v-lifepo4-energy-storage-upgrade","provider":"Site Ready Supply","version":"1.0","type":"link"}