{"product_id":"ethos-eg4-flexboss18-ess","title":"BigBattery ETHOS \u0026 EG4 FlexBOSS18 | 13kW Solar Battery System","description":"\u003cp\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/WJBwmXjI2Lc?si=2vicShVgqkZUo_8h\" title=\"YouTube video player\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003ch3 data-start=\"0\" data-end=\"46\"\u003e\u003cbr\u003e\u003c\/h3\u003e\n\u003ch3 data-start=\"0\" data-end=\"46\"\u003eETHOS EG4 FlexBOSS18 ESS\u003c\/h3\u003e\n\u003cdiv class=\"container\"\u003e\n\u003cdiv dir=\"ltr\" aria-busy=\"false\" aria-live=\"polite\" id=\"model-response-message-contentr_bf143e0172d7b05c\" class=\"markdown markdown-main-panel enable-updated-hr-color\"\u003e\n\u003cp data-path-to-node=\"6\"\u003eThe ETHOS Energy Storage System (ESS) is a high-performance solution engineered for both residential and commercial applications. It combines advanced LiFePO4 (Lithium Iron Phosphate) battery technology with the powerful 13kW EG4 FlexBOSS18 hybrid inverter to deliver intelligent energy management. This system is designed for grid-tied, hybrid, and backup power applications, ensuring a future-ready, scalable energy supply.\u003c\/p\u003e\n\u003cp data-path-to-node=\"7\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"7\"\u003eKey Features\u003c\/b\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"8\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,0,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"8,0,0\"\u003ePowerful Output:\u003c\/b\u003e Features the 13kW EG4 FlexBOSS18 hybrid inverter for high-capacity power delivery.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,1,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"8,1,0\"\u003eHigh-Capacity Storage:\u003c\/b\u003e Modular 10.24kWh energy storage modules expandable to meet increasing energy demands.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,2,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"8,2,0\"\u003ePremium Chemistry:\u003c\/b\u003e Built with LiFePO4 technology for maximum safety, thermal stability, and consistent performance.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,3,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"8,3,0\"\u003eAll-Weather Performance:\u003c\/b\u003e IP65 and NEMA 4X rated enclosure allows for safe indoor or outdoor installation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,4,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"8,4,0\"\u003eAdvanced Safety:\u003c\/b\u003e Includes an integrated Battery Management System (BMS) and built-in fire protection.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,5,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"8,5,0\"\u003eFlexible Configurations:\u003c\/b\u003e Supports grid-tied, hybrid, and off-grid configurations with real-time monitoring.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-path-to-node=\"9\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"9\"\u003ePerformance and Efficiency\u003c\/b\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"10\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"10,0,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"10,0,0\"\u003eHigh Cycle Life:\u003c\/b\u003e Engineered for 6,000+ cycles, providing over a decade of reliable daily use.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"10,1,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"10,1,0\"\u003eOptimized Charging:\u003c\/b\u003e Features closed-loop communication for chemistry-aware charging and improved safety.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"10,2,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"10,2,0\"\u003eReliable Efficiency:\u003c\/b\u003e Achieves 99.9% battery charging efficiency through advanced MPPT controllers.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-path-to-node=\"11\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"11\"\u003eProduct Details\u003c\/b\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"12\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,0,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"12,0,0\"\u003eBattery Specifications:\u003c\/b\u003e 10.24kWh capacity per module, 48V nominal voltage, and 200Ah capacity.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,1,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"12,1,0\"\u003eInverter Specifications:\u003c\/b\u003e 13kW hybrid output with 120\/240V split-phase AC output.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,2,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"12,2,0\"\u003eOperating Range:\u003c\/b\u003e Discharge temperature range from -4°F to 140°F (-20°C to 60°C).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,3,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"12,3,0\"\u003eDimensions:\u003c\/b\u003e System stands 43.3” H x 26.5” W x 6.7” D.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,4,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"12,4,0\"\u003eWeight:\u003c\/b\u003e Total system weight is approximately 273 lbs (123.8 kg).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-path-to-node=\"13\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"13\"\u003eWhat’s Included\u003c\/b\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"14\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"14,0,0\"\u003eETHOS stackable lithium battery modules (10.24kWh total).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"14,1,0\"\u003eETHOS Control Box with integrated monitoring system.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"14,2,0\"\u003eEG4 FlexBOSS18 13kW hybrid inverter.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"14,3,0\"\u003eAll necessary mounting components and power cables.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-path-to-node=\"15\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"15\"\u003eApplications\u003c\/b\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"16\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"16,0,0\"\u003eResidential solar energy storage and home backup.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"16,1,0\"\u003eCommercial energy storage for peak energy cost management.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"16,2,0\"\u003eOff-grid installations and emergency backup power systems.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-path-to-node=\"17\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"17\"\u003eSafety and Protection\u003c\/b\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"18\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"18,0,0\"\u003eOvercharge and over-discharge protection via advanced BMS.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"18,1,0\"\u003eTemperature monitoring and integrated short circuit\/overload protection.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"18,2,0\"\u003eUL 9540, UL 9540A, and UL 1973 certified for the highest industry safety standards.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-path-to-node=\"19\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"19\"\u003eExpandable Design\u003c\/b\u003e The modular architecture of the ETHOS system allows for easy expansion as your energy needs grow. Additional battery modules can be stacked to increase capacity, making this a scalable, long-term energy solution.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!----\u003e\n\u003c\/div\u003e\n\u003cp data-end=\"3299\" data-start=\"3108\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0905\/1868\/3895\/files\/1.jpg?v=1775011481\" alt=\"\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-turn-start-message=\"true\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" data-message-model-slug=\"gpt-5-3\" dir=\"auto\" data-message-id=\"9d14cac6-cae6-4142-908a-d603024fcad7\" data-message-author-role=\"assistant\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert w-full wrap-break-word dark markdown-new-styling\"\u003e\n\u003ch3 data-end=\"1867\" data-start=\"1846\"\u003eDocument Links\u003c\/h3\u003e\n\u003cp data-end=\"1893\" data-start=\"1869\"\u003e\u003cstrong data-end=\"1891\" data-start=\"1869\"\u003eBattery Downloads:\u003ca rel=\"noopener\" href=\"https:\/\/bigbattery.com\/wp-content\/uploads\/2023\/11\/ETHOS-NEW-COC.pdf\" class=\"download-btn\" target=\"_blank\"\u003e\u003c\/a\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-end=\"2250\" data-start=\"1894\"\u003e\n\u003cli data-end=\"1946\" data-start=\"1894\" data-section-id=\"161rkiw\"\u003eSpec Sheet –\u003ca href=\"https:\/\/bigbattery.com\/wp-content\/uploads\/2025\/11\/ETHOS-NEW-SpecSheet-1.5-BatteryCB.pdf\"\u003e https:\/\/bigbattery.com\/wp-content\/uploads\/2025\/11\/ETHOS-NEW-SpecSheet-1.5-BatteryCB.pdf\u003c\/a\u003e\u003cbr\u003e\u003ca rel=\"noopener\" href=\"https:\/\/bigbattery.com\/wp-content\/uploads\/2024\/08\/ETHOSManual-halfletter-V1.5.pdf\" class=\"download-btn\" target=\"_blank\"\u003e\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"v4a392\" data-start=\"1947\" data-end=\"2048\"\u003e\n\u003cspan\u003eUser Manual:\u003c\/span\u003e – \u003ca href=\"https:\/\/bigbattery.com\/wp-content\/uploads\/2024\/08\/ETHOSManual-halfletter-V1.5.pdf\"\u003ehttps:\/\/bigbattery.com\/wp-content\/uploads\/2024\/08\/ETHOSManual-halfletter-V1.5.pdf\u003c\/a\u003e\u003cstrong data-end=\"1891\" data-start=\"1869\"\u003e\u003ca rel=\"noopener\" href=\"https:\/\/bigbattery.com\/wp-content\/uploads\/2024\/08\/ETHOSManual-halfletter-V1.5.pdf\" class=\"download-btn\" target=\"_blank\"\u003e\u003c\/a\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2250\" data-start=\"2151\" data-section-id=\"124e4pn\"\u003eSafety Data Sheet –  \u003ca href=\"https:\/\/bigbattery.com\/wp-content\/uploads\/2023\/11\/SDS_BigBattery_LFP-1.pdf\"\u003ehttps:\/\/bigbattery.com\/wp-content\/uploads\/2023\/11\/SDS_BigBattery_LFP-1.pdf\u003c\/a\u003e\u003ca class=\"decorated-link cursor-pointer\" rel=\"noopener\" data-end=\"2248\" data-start=\"2173\"\u003e\u003cspan class=\"ms-0.5 inline-block align-middle leading-none\" aria-hidden=\"true\"\u003e\u003csvg class=\"block h-[0.75em] w-[0.75em] stroke-current stroke-[0.75]\" data-rtl-flip=\"\" aria-hidden=\"true\" height=\"20\" width=\"20\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cuse href=\"\/cdn\/assets\/sprites-core-fxfgsfqf.svg#304883\" fill=\"currentColor\"\u003e\u003c\/use\u003e\u003c\/svg\u003e\u003c\/span\u003e\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"2277\" data-start=\"2252\"\u003e\u003cstrong data-end=\"2275\" data-start=\"2252\"\u003eInverter Downloads:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-end=\"2747\" data-start=\"2278\"\u003e\n\u003cli data-end=\"2412\" data-start=\"2278\" data-section-id=\"5nhxi7\"\u003eSpec Sheet –\u003ca href=\"https:\/\/bigbattery.com\/wp-content\/uploads\/2025\/05\/EG4-FlexBOSS18-Hybrid-Inverter-Spec-Sheet.pdf\"\u003e https:\/\/bigbattery.com\/wp-content\/uploads\/2025\/01\/EG4-FlexBoss21-Spec-Sheet.pdf\u003c\/a\u003e\u003ca href=\"https:\/\/bigbattery.com\/wp-content\/uploads\/2025\/01\/EG4-FlexBoss21-Spec-Sheet.pdf\" class=\"decorated-link\" rel=\"noopener\" data-end=\"2372\" data-start=\"2293\"\u003e\u003cspan class=\"ms-0.5 inline-block align-middle leading-none\" aria-hidden=\"true\"\u003e\u003csvg class=\"block h-[0.75em] w-[0.75em] stroke-current stroke-[0.75]\" data-rtl-flip=\"\" aria-hidden=\"true\" height=\"20\" width=\"20\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cuse href=\"\/cdn\/assets\/sprites-core-fxfgsfqf.svg#304883\" fill=\"currentColor\"\u003e\u003c\/use\u003e\u003c\/svg\u003e\u003c\/span\u003e\u003c\/a\u003e \u003cspan data-state=\"closed\" class=\"\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2541\" data-start=\"2413\" data-section-id=\"erktmd\"\u003eUser Manual – \u003ca href=\"https:\/\/bigbattery.com\/wp-content\/uploads\/2025\/05\/EG4-FlexBOSS18-Hybrid-Inverter-User-Manual.pdf\"\u003ehttps:\/\/bigbattery.com\/wp-content\/uploads\/2025\/01\/FlexBOSS-21-Manual.pdf\u003c\/a\u003e\u003ca href=\"https:\/\/bigbattery.com\/wp-content\/uploads\/2025\/01\/FlexBOSS-21-Manual.pdf\" class=\"decorated-link\" rel=\"noopener\" data-end=\"2501\" data-start=\"2429\"\u003e\u003cspan class=\"ms-0.5 inline-block align-middle leading-none\" aria-hidden=\"true\"\u003e\u003csvg class=\"block h-[0.75em] w-[0.75em] stroke-current stroke-[0.75]\" data-rtl-flip=\"\" aria-hidden=\"true\" height=\"20\" width=\"20\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cuse href=\"\/cdn\/assets\/sprites-core-fxfgsfqf.svg#304883\" fill=\"currentColor\"\u003e\u003c\/use\u003e\u003c\/svg\u003e\u003c\/span\u003e\u003c\/a\u003e \u003cspan data-state=\"closed\" class=\"\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"mt-3 w-full empty:hidden\"\u003e\n\u003cdiv class=\"text-center\"\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"EG4","offers":[{"title":"1x FlexBOSS18 + 2x ETHOS","offer_id":50652027977975,"sku":"K0230","price":6275.0,"currency_code":"USD","in_stock":true},{"title":"1x FlexBOSS18 + 3x ETHOS","offer_id":50652028010743,"sku":"K0231","price":7575.0,"currency_code":"USD","in_stock":true},{"title":"1x FlexBOSS18 + 4x ETHOS","offer_id":50652028043511,"sku":"K0232","price":9065.0,"currency_code":"USD","in_stock":true},{"title":"1x FlexBOSS18 + 6x ETHOS","offer_id":50652028076279,"sku":"K0233","price":11645.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0905\/1868\/3895\/files\/ETHOS_EG4FLEXBOSS18ESS1.png?v=1775014281","url":"https:\/\/northgridsupply.com\/products\/ethos-eg4-flexboss18-ess","provider":"Northgrid Supply","version":"1.0","type":"link"}