{"product_id":"big-battery-nexus-apex-6-5k-off-grid-system","title":"Big Battery Nexus + APEX 6.5K Off-Grid System","description":"\u003ch1\u003eBig Battery Nexus + APEX 6.5K Off-Grid System\u003c\/h1\u003e\n\u003cp\u003e\u003cspan\u003eMeet the \u003cstrong\u003eAPEX 6.5K off-grid hybrid inverter\u003c\/strong\u003e engineered for true energy independence. Delivering split-phase 120\/240 V at 50\/60 Hz with clean, pure sine-wave output, APEX pairs flawlessly with modern LiFePO₄ banks and accepts both solar and generator inputs for seamless, all-day autonomy. An 80A pass-through keeps large appliances and critical loads humming, while wide operating temps and an outdoor-ready enclosure mean reliable performance in real-world conditions. Installer-friendly bottom-entry wiring and smart protections round out a system that’s rugged, efficient, and ready to power your cabin, homestead, or remote residences to deliver the ultimate source of energy independence.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eDESCRIPTION:\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch3 class=\"wp-block-heading has-text-align-left\" id=\"h-introducing-the-apex-inverter-series\"\u003eIntroducing The APEX Inverter Series\u003c\/h3\u003e\n\u003cdiv class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-11ebca16 wp-block-columns-is-layout-flex\"\u003e\n\u003cdiv class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"\u003e\n\u003cp\u003eMeet the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eBigBattery\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAPEX Off-Grid Hybrid Inverter Series (6.5K \u0026amp; 10K)\u003c\/strong\u003e—engineered for true energy independence with two power-class options to match your build. Both models deliver split-phase 120\/240V at 50\/60 Hz with clean, pure sine-wave output, pairing seamlessly with modern LiFePO₄ battery banks for stable, efficient performance. Designed for real-world autonomy, APEX supports solar and generator inputs so you can stay powered day and night, season after season.\u003c\/p\u003e\n\u003cp\u003eBuilt to handle demanding loads, the APEX Series features an 80A pass-through to keep large appliances and critical circuits running smoothly, while wide operating temperatures and an outdoor-ready enclosure provide dependable performance in harsh conditions. With installer-friendly bottom-entry wiring and intelligent protections baked in, APEX is a rugged, efficient, and practical backbone for cabins, homesteads, remote residences, and off-grid properties—delivering a streamlined path to reliable, all-day power.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2\u003e\u003cspan\u003eFEATURES:\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"wp-block-heading\" id=\"h-whole-home-split-phase-power\"\u003e\u003cstrong\u003eWhole-Home Split-Phase Power:\u003c\/strong\u003e Delivers clean, pure sine-wave electricity to run larger appliances and essential circuits with confidence. Ideal for cabins, homesteads, and off-grid homes that need true 120\/240V performance.\u003c\/p\u003e\n\u003cp class=\"wp-block-heading\" id=\"h-solar-ready-set-up\"\u003e\u003cstrong\u003eSolar Ready Set-Up:\u003c\/strong\u003e Designed to accept both solar and generator inputs on APEX-6.5K so you can stay powered day and night. When sunlight dips, your generator can seamlessly keep the system charging and your loads running.\u003c\/p\u003e\n\u003cp class=\"wp-block-heading\" id=\"h-off-grid-reliability\"\u003e\u003cstrong\u003eOff-Grid Reliability: \u003c\/strong\u003eInstaller-friendly bottom-entry wiring and built-in protections help keep your setup clean, safe, and dependable for any remote residences.\u003cspan\u003e \u003c\/span\u003eInputs vary on both inverters, read the specification sheet for more information on inputs between both inverters.\u003c\/p\u003e\n\u003cp class=\"wp-block-heading\" id=\"h-go-big-on-power\"\u003e\u003cstrong\u003eGo Big On Power:\u003c\/strong\u003e The APEX inverter series \u0026amp; NEXUS battery kit paired together is the ultimate solar set up for all off-grid enthusiasts, whether its a cozy log cabin, modest tiny home or a vast ranch, this ESS was designed to ensure your energy independence, protect yourself from outages \u0026amp; blackouts and stay powered.\u003c\/p\u003e\n\u003cp class=\"wp-block-heading\"\u003e\u003cimg\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0721\/5647\/9786\/files\/01_e45a786e-cf29-4a9c-b8e8-2773972e4608.jpg?v=1771964769\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth class=\"has-text-align-center\" data-align=\"center\"\u003eINVERTER INPUTS\u003c\/th\u003e\n\u003cth class=\"has-text-align-center\" data-align=\"center\"\u003eAPEX-6.5K\u003c\/th\u003e\n\u003cth class=\"has-text-align-center\" data-align=\"center\"\u003eAPEX-10K\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003eGrid\u003c\/td\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003eyes\u003c\/td\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003eyes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003eLoad\u003c\/td\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003eyes\u003c\/td\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003eyes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003eGenerator\u003c\/td\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003eyes\u003c\/td\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003eyes*\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003eBAT –\u003c\/td\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003eyes\u003c\/td\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003eyes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003eBAT +\u003c\/td\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003eyes\u003c\/td\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003eyes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003ePV\u003c\/td\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003eyes\u003c\/td\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003eyes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003eParallel Connection\u003c\/td\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003eyes\u003c\/td\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003eyes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003eUSB\u003c\/td\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003eyes\u003c\/td\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003eyes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003eCT\u003c\/td\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003eyes\u003c\/td\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003eno\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003eWiFi\u003c\/td\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003eyes\u003c\/td\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003eyes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003eRS485\/CAN\u003c\/td\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003eyes\u003c\/td\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003eyes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003eDry Contact\u003c\/td\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003eyes\u003c\/td\u003e\n\u003ctd class=\"has-text-align-center\" data-align=\"center\"\u003eyes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cspan\u003e*For the \u003c\/span\u003e\u003cstrong\u003eAPEX-10K\u003c\/strong\u003e\u003cspan\u003e, single AC input supports either \u003c\/span\u003e\u003cstrong\u003egrid or generator\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e(\u003c\/span\u003e\u003cstrong\u003enot simultaneously\u003c\/strong\u003e\u003cspan\u003e).\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eSPECIFICATIONS:\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eInverter Specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"table-body table-single\"\u003e\n\u003cdiv class=\"table-row\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0721\/5647\/9786\/files\/02_b5d6d001-9990-4812-b729-30296dc67a0e.jpg?v=1771965088\" alt=\"\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"table-row\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0721\/5647\/9786\/files\/03_2eafc600-6140-4896-a27c-87c8f9d23777.jpg?v=1771965089\" alt=\"\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"table-row\"\u003e\u003cstrong\u003eBattery Specifications\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"table-row\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0721\/5647\/9786\/files\/01_e5e98d42-9739-431a-abb9-15653833a7f2.jpg?v=1771967061\" alt=\"\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"table-row\"\u003e\n\u003ch2\u003e\u003cspan\u003eINCLUDES:\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003e\u003c\/span\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003e1 x Nexus + 1 x APEX 6.5K\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan class=\"bb-item-qty\"\u003e1 x \u003c\/span\u003e\u003cspan class=\"bb-item-title\"\u003e48V 15kWH NEXUS LiFePO4 Battery (F-NXUS-48150-G1)\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan class=\"bb-item-title\"\u003e1 x 2AWG (Black and Red) 3FT Ring to Ring Terminal Cable (CBL086)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e1 x APEX-6.5K Off-Grid Inverter (INV034)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003e2 x Nexus + 1 x APEX 6.5K\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan class=\"bb-item-qty\"\u003e2 x \u003c\/span\u003e\u003cspan class=\"bb-item-title\"\u003e48V 15kWH NEXUS LiFePO4 Battery (F-NXUS-48150-G1)\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan class=\"bb-item-title\"\u003e3 x 2AWG (Black and Red) 3FT Ring to Ring Terminal Cable (CBL086)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan class=\"bb-item-title\"\u003e1 x Parallel Busbar (CNT015)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e1 x APEX-6.5K Off-Grid Inverter (INV034)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003e3 x Nexus + 1 x APEX 6.5K\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan class=\"bb-item-qty\"\u003e3 x \u003c\/span\u003e\u003cspan class=\"bb-item-title\"\u003e48V 15kWH NEXUS LiFePO4 Battery (F-NXUS-48150-G1)\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan class=\"bb-item-title\"\u003e4 x 2AWG (Black and Red) 3FT Ring to Ring Terminal Cable (CBL086)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan class=\"bb-item-title\"\u003e1 x Parallel Busbar (CNT015)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e1 x APEX-6.5K Off-Grid Inverter (INV034)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003e2 x Nexus + 2 x APEX 6.5K\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan class=\"bb-item-qty\"\u003e2 x \u003c\/span\u003e\u003cspan class=\"bb-item-title\"\u003e48V 15kWH NEXUS LiFePO4 Battery (F-NXUS-48150-G1)\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan class=\"bb-item-title\"\u003e4 x 2AWG (Black and Red) 3FT Ring to Ring Terminal Cable (CBL086)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan class=\"bb-item-title\"\u003e1 x Parallel Busbar (CNT015)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e2 x APEX-6.5K Off-Grid Inverter (INV034)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003e3 x Nexus + 3 x APEX 6.5K\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan class=\"bb-item-qty\"\u003e3 x \u003c\/span\u003e\u003cspan class=\"bb-item-title\"\u003e48V 15kWH NEXUS LiFePO4 Battery (F-NXUS-48150-G1)\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan class=\"bb-item-title\"\u003e6 x 2AWG (Black and Red) 3FT Ring to Ring Terminal Cable (CBL086)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan class=\"bb-item-title\"\u003e1 x Parallel Busbar (CNT015)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e3 x APEX-6.5K Off-Grid Inverter (INV034)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cspan\u003eGUIDE:\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch4\u003e\u003ca href=\"https:\/\/bigbattery.com\/wp-content\/uploads\/2026\/02\/APEX-SpecSheet0202.pdf\"\u003e\u003cspan style=\"color: rgb(43, 0, 255);\"\u003eSpecification Sheet - APEX 6.5K Off-Grid Inverter\u003c\/span\u003e\u003c\/a\u003e\u003c\/h4\u003e\n\u003ch4\u003e\u003ca href=\"https:\/\/bigbattery.com\/wp-content\/uploads\/2026\/01\/BigBattery-Apex-6.5-User-Manual.docx.pdf\"\u003e\u003cspan style=\"color: rgb(43, 0, 255);\"\u003eUser Manual - APEX 6.5K Off-Grid Inverter\u003c\/span\u003e\u003c\/a\u003e\u003c\/h4\u003e\n\u003ch4\u003e\u003cspan style=\"color: rgb(43, 0, 255);\"\u003e\u003ca href=\"https:\/\/bigbattery.com\/wp-content\/uploads\/2026\/02\/APEX-SpecSheet0202.pdf\"\u003e\u003c\/a\u003e\u003ca href=\"https:\/\/bigbattery.com\/wp-content\/uploads\/2026\/01\/Nexus-SpecSheet.pdf\"\u003eSpecification Sheet - Nexus\u003c\/a\u003e\u003c\/span\u003e\u003c\/h4\u003e\n\u003ch4\u003e\u003ca href=\"https:\/\/bigbattery.com\/wp-content\/uploads\/2025\/12\/NEXUS-User-Manual1.2.3.pdf\"\u003e\u003cspan style=\"color: rgb(43, 0, 255);\"\u003eUser Manual - Nexus\u003c\/span\u003e\u003c\/a\u003e\u003c\/h4\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Big Battery","offers":[{"title":"1 x Nexus + 1 x APEX 6.5K","offer_id":51179236655402,"sku":"K0191","price":4535.0,"currency_code":"USD","in_stock":true},{"title":"2 x Nexus + 1 x APEX 6.5K","offer_id":51179236688170,"sku":"K0192","price":7680.0,"currency_code":"USD","in_stock":true},{"title":"3 x Nexus + 1 x APEX 6.5K","offer_id":51179236720938,"sku":"K0193","price":10725.0,"currency_code":"USD","in_stock":true},{"title":"2 x Nexus + 2 x APEX 6.5K","offer_id":51179236753706,"sku":"K0194","price":9235.0,"currency_code":"USD","in_stock":true},{"title":"3 x Nexus + 3 x APEX 6.5K","offer_id":51179236786474,"sku":"K0195","price":13835.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0721\/5647\/9786\/files\/Nexus-Apex-6.5K-Default-scaled.png?v=1771967275","url":"https:\/\/thehomeupgrade.com\/products\/big-battery-nexus-apex-6-5k-off-grid-system","provider":"The Home Upgrade","version":"1.0","type":"link"}