{"product_id":"bigbattery-ethos-eg4-flexboss21-kit-10-24-30-72-kwh-split-phase-home-ess","title":"BigBattery ETHOS + EG4 FlexBOSS21 Kit | 10.24–30.72 kWh | Split-Phase Home ESS","description":"\u003cdiv data-savings-banner=\"bb-eg4\" style=\"background:linear-gradient(90deg,#1a2b45,#2c4a7c);color:#ffffff;padding:14px 18px;border-radius:8px;margin:0 0 16px 0;text-align:center;\"\u003e\n\u003cstrong style=\"font-size:16px;letter-spacing:0.5px;\"\u003e$250 Off Orders Over $5,000\u003c\/strong\u003e\u003cbr\u003e\u003cspan style=\"font-size:14px;\"\u003eBigBattery and EG4 orders of $5,000 or more qualify for $250 off, applied automatically at checkout. No discount code required.\u003c\/span\u003e\n\u003c\/div\u003e\u003cp\u003eThe step-up configuration: stackable \u003cstrong\u003eBigBattery ETHOS\u003c\/strong\u003e LiFePO4 batteries paired with the \u003cstrong\u003eEG4 FlexBOSS21 hybrid inverter\u003c\/strong\u003e — 21 kW of PV input and 16 kW of split-phase AC output with four MPPTs, scalable design, and remote Wi-Fi monitoring. Configure 10.24 kWh to 30.72 kWh of storage to match your backup goals.\u003c\/p\u003e\n\u003ch3\u003eWhat's in the kit\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 × EG4 FlexBOSS21 hybrid solar inverter (21 kW PV \/ 16 kW AC, split-phase, 4 MPPT)\u003c\/li\u003e\n\u003cli\u003eYour choice of 2, 3, 4, or 6 × BigBattery ETHOS 48V 5.12 kWh LiFePO4 battery modules\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigher AC output:\u003c\/strong\u003e 16 kW split-phase output for larger homes and heavier simultaneous loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour MPPT inputs\u003c\/strong\u003e for complex arrays across multiple orientations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety-certified battery platform:\u003c\/strong\u003e ETHOS modules are built on UL1973-listed cells with UL9540A-tested design.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemote monitoring:\u003c\/strong\u003e app-based visibility of production and battery state via Wi-Fi.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eScalable:\u003c\/strong\u003e add ETHOS modules over time as your storage needs grow.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eGood to know\u003c\/h3\u003e\n\u003cp\u003eSelect your storage capacity from the Battery Configuration menu — pricing shown is for the complete kit. Ships by freight carrier; delivery timing is confirmed once your order is accepted. Professional installation by a licensed electrician is recommended.\u003c\/p\u003e","brand":"BigBattery","offers":[{"title":"2 × ETHOS — 10.24 kWh","offer_id":49051018002587,"sku":"K0241","price":6460.0,"currency_code":"USD","in_stock":true},{"title":"3 × ETHOS — 15.36 kWh","offer_id":49051018035355,"sku":"K0242","price":7720.0,"currency_code":"USD","in_stock":true},{"title":"4 × ETHOS — 20.48 kWh","offer_id":49051018068123,"sku":"K0243","price":9195.0,"currency_code":"USD","in_stock":true},{"title":"6 × ETHOS — 30.72 kWh","offer_id":49051018100891,"sku":"K0244","price":11695.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0746\/0614\/9787\/files\/214-3.png?v=1784676141","url":"https:\/\/offgridhorizon.com\/products\/bigbattery-ethos-eg4-flexboss21-kit-10-24-30-72-kwh-split-phase-home-ess","provider":"OffGrid Horizon","version":"1.0","type":"link"}