{"product_id":"bigbatttery-ethos-eg4-flexboss21-ess","title":"BigBatttery ETHOS + EG4 FLEXBOSS21 ESS","description":"\u003csection style=\"font-family: 'Roboto', sans-serif; color: #121212; line-height: 1.6; width: 100%; max-width: 600px; padding: 16px; margin: 0 auto; box-sizing: border-box; overflow-x: hidden;\"\u003e\u003c!-- Product Title --\u003e\n\u003ch1 style=\"color: rgb(19, 49, 175); font-weight: 600; font-size: 24px; margin-bottom: 10px; line-height: 1.2;\"\u003eBigBattery ETHOS™ + FlexBOSS21 ESS System | Expandable 48V LiFePO₄ Battery | 21kW PV Input | 12kW Hybrid Inverter\u003c\/h1\u003e\n\u003c!-- Product Subtitle --\u003e\n\u003cp style=\"font-size: 15px; margin-bottom: 12px; line-height: 1.4;\"\u003eScalable Energy Storage System with ETHOS™ Lithium Batteries, FlexBOSS21 Hybrid Inverter \u0026amp; Advanced Whole-Home Energy Management\u003c\/p\u003e\n\u003c!-- Product Description --\u003e\n\u003cp style=\"font-size: 14px; margin-bottom: 16px; line-height: 1.5;\"\u003eThe BigBattery ETHOS™ + FlexBOSS21 ESS System is a complete next-generation energy storage solution designed for homeowners, businesses, and off-grid users seeking maximum flexibility and long-term energy independence. Combining the expandable ETHOS™ 48V lithium battery platform with the advanced FlexBOSS21 hybrid inverter, this integrated system delivers reliable backup power, intelligent energy management, and industry-leading scalability. Featuring up to 21,000W of solar input capacity, 12kW continuous output, three MPPT inputs, and support for over 80kWh of expandable battery storage, this system is engineered to grow alongside your energy needs while maximizing solar production and system efficiency.\u003c\/p\u003e\n\u003c!-- Key Features --\u003e\n\u003ch4 style=\"color: #121212; font-weight: 600; font-size: 16px; margin-bottom: 8px;\"\u003eKey Features:\u003c\/h4\u003e\n\u003cul style=\"padding-left: 20px; margin-bottom: 16px; font-size: 14px; color: #121212; list-style-type: disc;\"\u003e\n\u003cli style=\"margin-bottom: 8px;\"\u003e\n\u003cstrong\u003eComplete ESS Solution:\u003c\/strong\u003e Fully integrated battery and inverter package engineered for seamless performance and simplified installation.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 8px;\"\u003e\n\u003cstrong\u003eExpandable ETHOS™ Battery Platform:\u003c\/strong\u003e Easily scale storage capacity beyond 80kWh to meet future energy requirements.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 8px;\"\u003e\n\u003cstrong\u003e21,000W Solar Input Capacity:\u003c\/strong\u003e Supports large solar arrays with three MPPT trackers for maximum energy harvest.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 8px;\"\u003e\n\u003cstrong\u003e12kW Continuous Output Power:\u003c\/strong\u003e Delivers dependable energy for whole-home backup and light commercial applications.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 8px;\"\u003e\n\u003cstrong\u003e120\/240V Split-Phase Output:\u003c\/strong\u003e Provides utility-grade power for residential and commercial loads.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 8px;\"\u003e\n\u003cstrong\u003eLiFePO₄ Battery Technology:\u003c\/strong\u003e Safe, stable lithium iron phosphate chemistry designed for long service life and dependable performance.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 8px;\"\u003e\n\u003cstrong\u003e6,000+ Cycle Life:\u003c\/strong\u003e Engineered for years of daily cycling and long-term energy savings.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 8px;\"\u003e\n\u003cstrong\u003eClosed-Loop Communication:\u003c\/strong\u003e Optimizes charging, discharging, and overall system performance between battery and inverter.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 8px;\"\u003e\n\u003cstrong\u003eGridBOSS Integration:\u003c\/strong\u003e Supports advanced load management, AC coupling, generator integration, and enhanced energy control.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 8px;\"\u003e\n\u003cstrong\u003eAdvanced Safety Protections:\u003c\/strong\u003e Includes rapid shutdown, ground fault protection, arc fault protection, and intelligent system safeguards.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 8px;\"\u003e\n\u003cstrong\u003eRemote Monitoring \u0026amp; Alerts:\u003c\/strong\u003e Wi-Fi-enabled monitoring provides real-time system visibility and performance tracking.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaintenance-Free Operation:\u003c\/strong\u003e Designed for reliable long-term performance without routine servicing requirements.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- Technical Specifications --\u003e\u003c!-- Ideal Applications --\u003e\n\u003ch4 style=\"color: #121212; font-weight: 600; font-size: 16px; margin-bottom: 8px;\"\u003eIdeal Applications:\u003c\/h4\u003e\n\u003cul style=\"padding-left: 20px; margin-bottom: 16px; font-size: 14px; color: #121212; list-style-type: disc;\"\u003e\n\u003cli\u003eWhole-home backup power systems\u003c\/li\u003e\n\u003cli\u003eLarge residential solar energy storage\u003c\/li\u003e\n\u003cli\u003eCommercial and light commercial energy systems\u003c\/li\u003e\n\u003cli\u003eOff-grid homes and remote properties\u003c\/li\u003e\n\u003cli\u003eHybrid solar and battery installations\u003c\/li\u003e\n\u003cli\u003eGenerator-assisted backup systems\u003c\/li\u003e\n\u003cli\u003eScalable energy independence projects\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- What’s Included --\u003e\n\u003ch4 style=\"color: #121212; font-weight: 600; font-size: 16px; margin-bottom: 8px;\"\u003eWhat’s Included:\u003c\/h4\u003e\n\u003cul style=\"padding-left: 20px; margin-bottom: 0; font-size: 14px; color: #121212; list-style-type: disc;\"\u003e\n\u003cli\u003e1 × BigBattery ETHOS™ 48V Battery System\u003c\/li\u003e\n\u003cli\u003e1 × EG4 FlexBOSS21 Hybrid Inverter\u003c\/li\u003e\n\u003cli\u003eGridBOSS MID Integration Support\u003c\/li\u003e\n\u003cli\u003eBattery-to-Inverter Communication Components\u003c\/li\u003e\n\u003cli\u003eMonitoring \u0026amp; Connectivity Interfaces\u003c\/li\u003e\n\u003cli\u003eUser Manuals \u0026amp; Installation Documentation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"EG4","offers":[{"title":"Default Title","offer_id":63712784417137,"sku":"K0241","price":6460.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0926\/1272\/3057\/files\/Screenshot2026-05-30at17.21.42.png?v=1780183339","url":"https:\/\/ecogridsupply.com\/products\/bigbatttery-ethos-eg4-flexboss21-ess","provider":"Eco Grid Supply","version":"1.0","type":"link"}