{"product_id":"eg4-flexboss21-wallmount-314ah-indoor-battery-kit-16-48-kwh-self-heating","title":"EG4 FlexBOSS21 + WallMount 314Ah Indoor Battery Kit | 16–48 kWh | Self-Heating","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 flagship all-EG4 indoor system: the \u003cstrong\u003eFlexBOSS21 hybrid inverter\u003c\/strong\u003e (21 kW PV \/ 16 kW AC, split-phase, 4 MPPT) paired with the \u003cstrong\u003eEG4 WallMount Indoor battery\u003c\/strong\u003e — 48V 314Ah (16 kWh) per unit, UL9540-listed system design with self-heating for cold-weather charging. Configure one to three batteries for 16, 32, or 48 kWh of storage.\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 1, 2, or 3 × EG4 WallMount Indoor 48V 314Ah batteries (16 kWh each, self-heating)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e16 kW split-phase output\u003c\/strong\u003e for larger homes and heavier simultaneous loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUL-listed system design\u003c\/strong\u003e suited to garage, basement, and utility-room installations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelf-heating cells\u003c\/strong\u003e keep charging available in cold spaces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle-brand ecosystem:\u003c\/strong\u003e EG4 inverter and EG4 batteries communicate natively, with remote Wi-Fi monitoring.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eGood to know\u003c\/h3\u003e\n\u003cp\u003eSelect your capacity from the Battery Configuration menu — pricing 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, and local permitting requirements apply to home energy storage installations.\u003c\/p\u003e","brand":"EG4","offers":[{"title":"1 × 16 kWh Indoor","offer_id":49051044741275,"sku":"K0210","price":7092.97,"currency_code":"USD","in_stock":true},{"title":"2 × 16 kWh Indoor — 32 kWh","offer_id":49051044774043,"sku":"K0211","price":10750.94,"currency_code":"USD","in_stock":true},{"title":"3 × 16 kWh Indoor — 48 kWh","offer_id":49051044806811,"sku":"K0212","price":14408.91,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0746\/0614\/9787\/files\/FLEXBOSS21-EG4-314Ah.png?v=1784676386","url":"https:\/\/offgridhorizon.com\/products\/eg4-flexboss21-wallmount-314ah-indoor-battery-kit-16-48-kwh-self-heating","provider":"OffGrid Horizon","version":"1.0","type":"link"}