{"product_id":"nexus-48v-14-3kwh-lifepo4-battery-eg4-6-000xp-inverter-off-grid-home-back-up-system","title":"NEXUS 48V 14.3kWH LiFePO4 Battery + EG4 6,000XP Inverter | Off-Grid Home Back-up System","description":"\u003cstyle\u003e\n.nexus6kw-pd {\n  --ink: #000000;\n  --ink-2: #141414;\n  --paper: #F7F7F7;\n  --card: #FFFFFF;\n  --text: #000000;\n  --text-light: #FFFFFF;\n  --muted: #5C5C5C;\n  --accent: #246AAF;\n  --accent-2: #36AF24;\n  --line: #E2E2E2;\n  --radius: 14px;\n  --font-display: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;\n  --font-mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;\n  font-family: var(--font-display) !important;\n  color: var(--text) !important;\n  opacity: 1 !important;\n  background: var(--card);\n  line-height: 1.65;\n  font-size: 16px;\n  border: 1px solid var(--line);\n  border-radius: var(--radius);\n  overflow: hidden;\n  box-shadow: 0 16px 40px rgba(16,20,25,0.10);\n}\n.nexus6kw-pd, .nexus6kw-pd *, .nexus6kw-pd *::before, .nexus6kw-pd *::after { box-sizing: border-box; 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} }\n\n\/* FAQ *\/\n.nx6k-faq { padding: 42px 32px; background: var(--paper); }\n.nx6k-faq details { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 2px 18px; margin-bottom: 10px; }\n.nx6k-faq summary { cursor: pointer; font-weight: 600; font-size: 14.8px; padding: 15px 24px 15px 0; list-style: none; position: relative; }\n.nx6k-faq summary::-webkit-details-marker { display: none; }\n.nx6k-faq summary::after { content: '+'; position: absolute; right: 0; top: 13px; font-size: 19px; color: var(--accent) !important; }\n.nx6k-faq details[open] summary::after { content: '\\2013'; }\n.nx6k-faq details p { padding: 0 0 16px; color: var(--muted) !important; font-size: 13.8px; max-width: 70ch; }\n\n\/* Downloads *\/\n.nx6k-downloads { padding: 42px 32px; background: var(--card); }\n.nexus6kw-pd .nx6k-dl-group-title { font-family: var(--font-mono) !important; font-size: 12px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted) !important; 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}\n\u003c\/style\u003e\n\u003cdiv class=\"nexus6kw-pd\"\u003e\n\u003c!-- ============ HERO ============ --\u003e\n\u003csection class=\"nx6k-hero\"\u003e\n\u003cp class=\"nx6k-eyebrow\"\u003e48V Off-Grid ESS · NEXUS + EG4 6000XP · Indoor System\u003c\/p\u003e\n\u003ch2\u003e14.3kWh of Off-Grid Power From a Pre-Matched Battery and Inverter Pair\u003c\/h2\u003e\n\u003cp class=\"nx6k-lead\"\u003eThis system pairs one BigBattery NEXUS 14.3kWh battery with one transformer-free EG4 6000XP inverter into a single closed-loop off-grid setup — 14.3kWh of storage and 6,000W of continuous output, with up to 8,000W of dual-MPPT solar input. It's an indoor installation for both components, built for cabins, homesteads, and off-grid homes, and it scales up to 214.5kWh of storage — or 18kW of combined output — on the same platform if you need more later.\u003c\/p\u003e\n\u003cdiv aria-hidden=\"true\" class=\"nx6k-divider\"\u003e\u003csvg preserveaspectratio=\"none\" viewbox=\"0 0 600 20\"\u003e\u003cpath stroke-linecap=\"round\" stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" d=\"M0,10 Q25,-4 50,10 T100,10 T150,10 T200,10 T250,10 T300,10 T350,10 T400,10 T450,10 T500,10 T550,10 T600,10\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c!-- ============ STATS ============ --\u003e\n\u003csection class=\"nx6k-stats\"\u003e\n\u003cdiv class=\"nx6k-stat\"\u003e\n\u003cspan class=\"num\"\u003e14.3kWh\u003c\/span\u003e\u003cspan class=\"label\"\u003eTotal Capacity\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nx6k-stat\"\u003e\n\u003cspan class=\"num\"\u003e6,000W\u003c\/span\u003e\u003cspan class=\"label\"\u003eContinuous Output\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nx6k-stat\"\u003e\n\u003cspan class=\"num\"\u003e8,000W\u003c\/span\u003e\u003cspan class=\"label\"\u003eMax PV Input\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nx6k-stat\"\u003e\n\u003cspan class=\"num\"\u003e214.5kWh\u003c\/span\u003e\u003cspan class=\"label\"\u003eMax Expandable\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c!-- ============ CONFIGURATION ============ --\u003e\n\u003csection class=\"nx6k-config\"\u003e\n\u003ch3\u003eWhat's In This System\u003c\/h3\u003e\n\u003cp class=\"nx6k-config-sub\"\u003eTwo components, pre-matched and sold together.\u003c\/p\u003e\n\u003cdiv class=\"nx6k-config-grid\"\u003e\n\u003cdiv class=\"nx6k-config-card\"\u003e\n\u003csvg aria-hidden=\"true\" stroke-linejoin=\"round\" stroke-linecap=\"round\" stroke-width=\"1.7\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\"\u003e\u003crect rx=\"2\" height=\"9\" width=\"17\" y=\"8\" x=\"2\"\u003e\u003c\/rect\u003e\u003crect stroke=\"none\" fill=\"currentColor\" rx=\"1\" height=\"3\" width=\"2.5\" y=\"11\" x=\"19\"\u003e\u003c\/rect\u003e\u003crect stroke=\"none\" fill=\"currentColor\" rx=\"0.6\" height=\"4.4\" width=\"4\" y=\"10.3\" x=\"5\"\u003e\u003c\/rect\u003e\u003c\/svg\u003e\n\u003cp class=\"qty\"\u003eQty 1\u003c\/p\u003e\n\u003ch4\u003eBigBattery NEXUS 14.3kWh\u003c\/h4\u003e\n\u003cp\u003eFloor-standing 48V LiFePO₄ battery, expandable up to 15 units in parallel for 214.5kWh total.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nx6k-config-card\"\u003e\n\u003csvg aria-hidden=\"true\" fill=\"currentColor\" viewbox=\"0 0 24 24\"\u003e\u003cpath d=\"M13 2 4 14h6l-1 8 9-12h-6l1-8z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cp class=\"qty\"\u003eQty 1\u003c\/p\u003e\n\u003ch4\u003eEG4 6000XP Hybrid Inverter\u003c\/h4\u003e\n\u003cp\u003e6,000W continuous output in a transformer-free design, with dual MPPT solar input up to 8,000W.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c!-- ============ FEATURES ============ --\u003e\n\u003csection class=\"nx6k-features\"\u003e\n\u003ch3\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0566\/2418\/5399\/files\/6000xp-Features-scaled-2-2048x820.webp?v=1784137205\" alt=\"A modern lakeside cabin at sunset showcases the EG4 6,000W 120VAC\/240VAC Off-Grid Hybrid Solar Inverter by EG4, featuring prominently an LED display (with crisp clarity rendered in IBM Plex Sans font), smart energy management, robust safety compliance, high efficiency, quiet operation, and scalable output—all presented with smooth border radius styling for a sleek contemporary aesthetic.\"\u003e\u003c\/h3\u003e\n\u003ch3\u003e\u003c\/h3\u003e\n\u003ch3\u003eWhat Makes This System Different\u003c\/h3\u003e\n\u003cdiv class=\"nx6k-feature-grid\"\u003e\n\u003cdiv class=\"nx6k-feature\"\u003e\n\u003csvg aria-hidden=\"true\" stroke-linejoin=\"round\" stroke-linecap=\"round\" stroke-width=\"1.7\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\"\u003e\u003crect rx=\"2\" height=\"9\" width=\"17\" y=\"8\" x=\"2\"\u003e\u003c\/rect\u003e\u003crect stroke=\"none\" fill=\"currentColor\" rx=\"1\" height=\"3\" width=\"2.5\" y=\"11\" x=\"19\"\u003e\u003c\/rect\u003e\u003crect stroke=\"none\" fill=\"currentColor\" rx=\"0.6\" height=\"4.4\" width=\"4\" y=\"10.3\" x=\"5\"\u003e\u003c\/rect\u003e\u003c\/svg\u003e\n\u003ch4\u003e14.3kWh NEXUS Battery\u003c\/h4\u003e\n\u003cp\u003eLiFePO₄ storage rated for 6,000+ cycles, with a 7.6kW continuous power rating and 270A peak discharge for 1 second.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nx6k-feature\"\u003e\n\u003csvg aria-hidden=\"true\" fill=\"currentColor\" viewbox=\"0 0 24 24\"\u003e\u003cpath d=\"M13 2 4 14h6l-1 8 9-12h-6l1-8z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003ch4\u003e6,000W Continuous, 12,000W Surge\u003c\/h4\u003e\n\u003cp\u003eThe EG4 6000XP delivers 6,000W continuously with up to 12,000W of surge headroom (3.5 sec) for motor starts.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nx6k-feature\"\u003e\n\u003csvg aria-hidden=\"true\" stroke-linecap=\"round\" stroke-width=\"1.7\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\"\u003e\u003crect rx=\"2\" height=\"18\" width=\"16\" y=\"3\" x=\"4\"\u003e\u003c\/rect\u003e\u003cpath d=\"M9 8h6M9 12h6M9 16h3\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003ch4\u003eTransformer-Free Design\u003c\/h4\u003e\n\u003cp\u003eA lighter, more efficient architecture than traditional transformer-based inverters, with less standby power lost as heat.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nx6k-feature\"\u003e\n\u003csvg aria-hidden=\"true\" stroke-linecap=\"round\" stroke-width=\"1.7\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\"\u003e\u003ccircle r=\"4.2\" cy=\"12\" cx=\"12\"\u003e\u003c\/circle\u003e\u003cpath d=\"M12 3v2M12 19v2M4.2 12H2.2M21.8 12h-2M5.6 5.6l1.4 1.4M17 17l1.4 1.4M18.4 5.6 17 7M7 17l-1.4 1.4\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003ch4\u003eDual MPPT, 8kW Solar Input\u003c\/h4\u003e\n\u003cp\u003eTwo independent MPPT trackers pull up to 8,000W combined, adjusting continuously through the day.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nx6k-feature\"\u003e\n\u003csvg aria-hidden=\"true\" stroke-width=\"1.7\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\"\u003e\u003crect transform=\"rotate(-18 7 12)\" rx=\"3\" height=\"6\" width=\"9\" y=\"9\" x=\"2.5\"\u003e\u003c\/rect\u003e\u003crect transform=\"rotate(-18 17 12)\" rx=\"3\" height=\"6\" width=\"9\" y=\"9\" x=\"12.5\"\u003e\u003c\/rect\u003e\u003c\/svg\u003e\n\u003ch4\u003eExpandable to 214.5kWh\u003c\/h4\u003e\n\u003cp\u003eUp to 15 NEXUS units can run in parallel with additional inverters, for serious long-term capacity growth.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nx6k-feature\"\u003e\n\u003csvg aria-hidden=\"true\" stroke-linejoin=\"round\" stroke-linecap=\"round\" stroke-width=\"1.7\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\"\u003e\u003cpath d=\"M13 2 3 14h6l-1 8L18 10h-6l1-8z\"\u003e\u003c\/path\u003e\u003cpath stroke-dasharray=\"1 3\" d=\"M21 3v5h-5\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003ch4\u003eSub-15ms UPS Transfer\u003c\/h4\u003e\n\u003cp\u003eSwitches to battery power in under 15 milliseconds, keeping sensitive electronics running through a grid drop without a hard reboot.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nx6k-feature\"\u003e\n\u003csvg aria-hidden=\"true\" stroke-linejoin=\"round\" stroke-linecap=\"round\" stroke-width=\"1.7\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\"\u003e\u003cpath d=\"M4 12a8 8 0 0 1 14-5.3M20 12a8 8 0 0 1-14 5.3\"\u003e\u003c\/path\u003e\u003cpath d=\"M18 3v4h-4M6 21v-4h4\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003ch4\u003e6,000+ Cycle Life\u003c\/h4\u003e\n\u003cp\u003eThe NEXUS battery is rated for years of daily charge and discharge cycles before capacity meaningfully declines.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nx6k-feature\"\u003e\n\u003csvg aria-hidden=\"true\" stroke-linejoin=\"round\" stroke-linecap=\"round\" stroke-width=\"1.7\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" class=\"nx6k-accent-2\"\u003e\u003cpath d=\"M12 2 4 5v6c0 5 3.4 8.4 8 9.9 4.6-1.5 8-4.9 8-9.9V5l-8-3Z\"\u003e\u003c\/path\u003e\u003cpath d=\"M8.5 12.3 10.8 14.6 15.5 9.9\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003ch4\u003eAdvanced BMS Protection\u003c\/h4\u003e\n\u003cp\u003eMulti-layer protection on both the battery and inverter for safe, reliable day-to-day operation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003cdiv aria-hidden=\"true\" style=\"background: var(--ink-2); color: var(--accent); opacity: 0.7;\" class=\"nx6k-divider\"\u003e\u003csvg preserveaspectratio=\"none\" viewbox=\"0 0 600 20\"\u003e\u003cpath stroke-linecap=\"round\" stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" d=\"M0,10 Q25,-4 50,10 T100,10 T150,10 T200,10 T250,10 T300,10 T350,10 T400,10 T450,10 T500,10 T550,10 T600,10\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/div\u003e\n\u003c!-- ============ NARRATIVE ============ --\u003e\n\u003csection class=\"nx6k-narrative\"\u003e\n\u003ch3\u003eA Pre-Matched Pair, Built for Indoor Installation\u003c\/h3\u003e\n\u003cp\u003eRather than picking a battery and inverter separately and hoping they communicate well together, this system ships as one closed-loop pairing: the NEXUS battery and EG4 6000XP inverter are designed and sold to work with each other directly. The 6000XP's transformer-free design keeps it lighter and more efficient than older inverter architectures, and it switches to battery power in under 15 milliseconds if the grid drops — close to seamless for anything plugged in at the time.\u003c\/p\u003e\n\u003cp\u003eWorth knowing before installing: this is an indoor system on both sides. The NEXUS battery is specified for indoor, floor-standing installation, and the EG4 6000XP is IP20 — neither is rated for direct outdoor exposure. Plan for a garage, utility room, or dedicated power space. In exchange, the platform scales seriously: up to 15 NEXUS units can run in parallel for 214.5kWh of total storage, and additional 6000XP inverters can be added for up to 18kW of combined output on this bundle's available configurations.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003c!-- ============ SPECS ============ --\u003e\n\u003csection class=\"nx6k-specs\"\u003e\n\u003ch3\u003eFull Specifications\u003c\/h3\u003e\n\u003cdiv class=\"nx6k-specs-block\"\u003e\n\u003cp class=\"nx6k-specs-block-title\"\u003eBattery — BigBattery NEXUS 14.3kWh (×1)\u003c\/p\u003e\n\u003cdiv class=\"nx6k-spec-groups\"\u003e\n\u003cdiv class=\"nx6k-spec-group\"\u003e\n\u003ch4\u003eCapacity\u003c\/h4\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem voltage\u003c\/td\u003e\n\u003ctd\u003e48 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal voltage\u003c\/td\u003e\n\u003ctd\u003e51.2 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChemistry\u003c\/td\u003e\n\u003ctd\u003eLiFePO₄\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUsable energy\u003c\/td\u003e\n\u003ctd\u003e14.3 kWh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAh capacity\u003c\/td\u003e\n\u003ctd\u003e280 Ah\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCell configuration\u003c\/td\u003e\n\u003ctd\u003e16S1P\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nx6k-spec-group\"\u003e\n\u003ch4\u003eCharging \u0026amp; Discharge\u003c\/h4\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax continuous discharge current\u003c\/td\u003e\n\u003ctd\u003e140 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax continuous power\u003c\/td\u003e\n\u003ctd\u003e7.6 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax discharge peak current\u003c\/td\u003e\n\u003ctd\u003e270A (1 sec)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax charge current\u003c\/td\u003e\n\u003ctd\u003e140 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCharging voltage range\u003c\/td\u003e\n\u003ctd\u003e53.5–57.6 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nx6k-spec-group\"\u003e\n\u003ch4\u003eEnvironmental\u003c\/h4\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCharge temp range\u003c\/td\u003e\n\u003ctd\u003e32–113°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDischarge temp range\u003c\/td\u003e\n\u003ctd\u003e-4–113°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptimal discharge temp\u003c\/td\u003e\n\u003ctd\u003e59–95°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHumidity range\u003c\/td\u003e\n\u003ctd\u003e10–95%, no condensation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection rating\u003c\/td\u003e\n\u003ctd\u003eIP54, indoor floor-standing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nx6k-spec-group\"\u003e\n\u003ch4\u003ePhysical \u0026amp; Other\u003c\/h4\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e~315 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions (W×H×D)\u003c\/td\u003e\n\u003ctd\u003e19.7 × 27.5 × 15.7 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunications\u003c\/td\u003e\n\u003ctd\u003eRS485, RJ45, CAN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax connections\u003c\/td\u003e\n\u003ctd\u003e15 parallel (214.5kWh)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nx6k-specs-block\"\u003e\n\u003cp class=\"nx6k-specs-block-title\"\u003eInverter — EG4 6000XP (×1)\u003c\/p\u003e\n\u003cdiv class=\"nx6k-spec-groups\"\u003e\n\u003cdiv class=\"nx6k-spec-group\"\u003e\n\u003ch4\u003eOutput\u003c\/h4\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput power\u003c\/td\u003e\n\u003ctd\u003e6,000 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSurge capacity\u003c\/td\u003e\n\u003ctd\u003e12,000W (3.5s) \/ 11,000W (5s)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput voltage\u003c\/td\u003e\n\u003ctd\u003e120\/240 Vac split-phase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax continuous output current\u003c\/td\u003e\n\u003ctd\u003e25A @ 240V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSwitching time\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;15ms single \/ \u0026lt;30ms parallel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nx6k-spec-group\"\u003e\n\u003ch4\u003eSolar \u0026amp; Charging\u003c\/h4\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMPPT channels\u003c\/td\u003e\n\u003ctd\u003e2 (1 input each)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax PV array power\u003c\/td\u003e\n\u003ctd\u003e8,000W (4,000W\/MPPT)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax discharge current\u003c\/td\u003e\n\u003ctd\u003e140 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax charge current\u003c\/td\u003e\n\u003ctd\u003e125 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nx6k-spec-group\"\u003e\n\u003ch4\u003eAC Input \u0026amp; Bypass\u003c\/h4\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax AC input power\u003c\/td\u003e\n\u003ctd\u003e9,000 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAC bypass\u003c\/td\u003e\n\u003ctd\u003e50 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery voltage range\u003c\/td\u003e\n\u003ctd\u003e46.4–60 Vdc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nx6k-spec-group\"\u003e\n\u003ch4\u003ePhysical \u0026amp; Other\u003c\/h4\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions (D×W×H)\u003c\/td\u003e\n\u003ctd\u003e5.25 × 18 × 25.5 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e52.9 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection rating\u003c\/td\u003e\n\u003ctd\u003eIP20, indoor only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eParallel capacity\u003c\/td\u003e\n\u003ctd\u003eUp to 16 units\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"font-size: 12.5px; color: var(--muted) !important; margin-top: 18px !important;\"\u003eOperating temperature: 32–113°F. Certification: UL1741.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003c!-- ============ SCALABILITY ============ --\u003e\n\u003csection class=\"nx6k-scale\"\u003e\n\u003ch3\u003eOther Configurations Available\u003c\/h3\u003e\n\u003cp\u003eThis same NEXUS and EG4 6000XP platform is sold in several sizes. The row below highlighted in your brand color is the configuration this page describes — everything else is shown for reference if a customer needs a different scale.\u003c\/p\u003e\n\u003ctable class=\"nx6k-scale-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eTier\u003c\/th\u003e\n\u003cth\u003eInverters\u003c\/th\u003e\n\u003cth\u003eBatteries\u003c\/th\u003e\n\u003cth\u003eCapacity\u003c\/th\u003e\n\u003cth\u003eMax Output\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"current\"\u003e\n\u003ctd class=\"tier\"\u003e1x Inverter\u003c\/td\u003e\n\u003ctd\u003e1×\u003c\/td\u003e\n\u003ctd\u003e1×\u003c\/td\u003e\n\u003ctd\u003e14.3 kWh\u003c\/td\u003e\n\u003ctd\u003e6 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"tier\"\u003e1x Inverter\u003c\/td\u003e\n\u003ctd\u003e1×\u003c\/td\u003e\n\u003ctd\u003e2×\u003c\/td\u003e\n\u003ctd\u003e28.6 kWh\u003c\/td\u003e\n\u003ctd\u003e6 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"tier\"\u003e1x Inverter\u003c\/td\u003e\n\u003ctd\u003e1×\u003c\/td\u003e\n\u003ctd\u003e3×\u003c\/td\u003e\n\u003ctd\u003e42.9 kWh\u003c\/td\u003e\n\u003ctd\u003e6 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"tier\"\u003e2x Inverter\u003c\/td\u003e\n\u003ctd\u003e2×\u003c\/td\u003e\n\u003ctd\u003e2×\u003c\/td\u003e\n\u003ctd\u003e28.6 kWh\u003c\/td\u003e\n\u003ctd\u003e12 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"tier\"\u003e3x Inverter\u003c\/td\u003e\n\u003ctd\u003e3×\u003c\/td\u003e\n\u003ctd\u003e3×\u003c\/td\u003e\n\u003ctd\u003e42.9 kWh\u003c\/td\u003e\n\u003ctd\u003e18 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003c!-- ============ FAQ ============ --\u003e\n\u003csection class=\"nx6k-faq\"\u003e\n\u003ch3\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0566\/2418\/5399\/files\/Nexus-Key-Features-3-scaled-1-2048x841.webp?v=1785056645\" alt=\"At sunset, a modern home equipped with rooftop solar panels is shown alongside a feature list for the BigBattery NEXUS 48V 14.3kWh LiFePO4 Battery + EG4 6,000XP Inverter | Off-Grid Home Back-up System. Key attributes—performance, protection, design, scalability, chemistry, and applications—are each represented with blue icons and concise descriptions. The presentation utilizes a clean font family for readability, subtle box shadow effects for added depth, and gently rounded borders that enhance the system’s contemporary visual appeal.\"\u003e\u003c\/h3\u003e\n\u003ch3\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0566\/2418\/5399\/files\/videoframe_6275.png?v=1785056659\" alt=\"A graph illustrates battery prices dropping from $830\/kWh in 2018 to $199\/kWh projected in 2025. To the right, BEST PRICE IN AMERICA appears prominently in bold IBM Plex Sans font. Nearby, the BigBattery NEXUS 48V 14.3kWh LiFePO4 Battery + APEX-10K Inverter | Off-Grid Home Back-Up System is showcased as a Low-Cost Leading Off-Grid LiFePO4 Battery—spotlighting its advanced Nexus 10k model and a modern interface designed with CSS variables for enhanced user experience.\"\u003e\u003c\/h3\u003e\n\u003ch3\u003e\u003c\/h3\u003e\n\u003ch3\u003eCommon Questions\u003c\/h3\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat exactly is included in this system?\u003c\/summary\u003e\n\u003cp\u003eOne BigBattery NEXUS 14.3kWh battery and one EG4 6000XP hybrid inverter, sold as a pre-matched closed-loop pair — 14.3kWh of storage and 6,000W of continuous output.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan this system be installed outdoors?\u003c\/summary\u003e\n\u003cp\u003eNo — both components are indoor-rated. The NEXUS battery is specified as indoor floor-standing, and the EG4 6000XP inverter is IP20. Plan for a garage, utility room, or dedicated indoor power space.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow is this different from the APEX-based NEXUS bundles?\u003c\/summary\u003e\n\u003cp\u003eThe EG4 6000XP is a transformer-free design, which trims weight and standby losses compared to the APEX inverters' transformer-based construction, and it switches to battery power in under 15ms if the grid drops. It also parallels up to 16 units on its own platform, well beyond the APEX line's 6-unit limit, for systems that need to scale further.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWill this run my entire house?\u003c\/summary\u003e\n\u003cp\u003eIt depends on your total connected load. At 6,000W continuous (12,000W surge) it covers most efficient homes and cabins comfortably, but a full load calculation is worth doing before sizing your system — especially with well pumps, electric heat, or several large appliances running together.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I expand this system later?\u003c\/summary\u003e\n\u003cp\u003eYes — up to 15 NEXUS battery units can run in parallel for 214.5kWh of total capacity, and the EG4 6000XP itself parallels up to 16 units for more combined output.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat's the warranty on this system?\u003c\/summary\u003e\n\u003cp\u003eThe NEXUS battery carries a 12-year manufacturer's warranty and the EG4 6000XP inverter carries a 10-year manufacturer's warranty — two separate coverage periods for the two components.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDo I need a licensed electrician to install it?\u003c\/summary\u003e\n\u003cp\u003eGiven the voltages and currents involved, installation should be handled by a qualified, licensed electrician or solar installer familiar with your local code requirements.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003c\/section\u003e\n\u003c!-- ============ DOWNLOADS ============ --\u003e\n\u003csection class=\"nx6k-downloads\"\u003e\n\u003ch3\u003eDocuments \u0026amp; Downloads\u003c\/h3\u003e\n\u003cdiv class=\"nx6k-dl-block\"\u003e\n\u003cp class=\"nx6k-dl-group-title\"\u003eBattery — BigBattery NEXUS\u003c\/p\u003e\n\u003cdiv class=\"nx6k-download-list\"\u003e\n\u003ca rel=\"noopener\" href=\"https:\/\/bigbattery.com\/wp-content\/uploads\/2025\/07\/Nexus-SpecSheet-july8.pdf\" class=\"nx6k-download\" target=\"_blank\"\u003e \u003csvg aria-hidden=\"true\" stroke-linejoin=\"round\" stroke-linecap=\"round\" stroke-width=\"1.7\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\"\u003e\u003cpath d=\"M12 3v12M7 10l5 5 5-5M4 19h16\"\u003e\u003c\/path\u003e\u003c\/svg\u003e Spec Sheet \u003c\/a\u003e \u003ca rel=\"noopener\" href=\"https:\/\/bigbattery.com\/wp-content\/uploads\/2025\/07\/NEXUS-User-Manual-1.3.2.pdf\" class=\"nx6k-download\" target=\"_blank\"\u003e \u003csvg aria-hidden=\"true\" stroke-linejoin=\"round\" stroke-linecap=\"round\" stroke-width=\"1.7\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\"\u003e\u003cpath d=\"M12 3v12M7 10l5 5 5-5M4 19h16\"\u003e\u003c\/path\u003e\u003c\/svg\u003e User Manual \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nx6k-dl-block\"\u003e\n\u003cp class=\"nx6k-dl-group-title\"\u003eInverter — EG4 6000XP\u003c\/p\u003e\n\u003cdiv class=\"nx6k-download-list\"\u003e\n\u003ca rel=\"noopener\" href=\"https:\/\/bigbattery.com\/wp-content\/uploads\/2024\/06\/EG4-6000XP-Inverter-Spec-Sheet.pdf\" class=\"nx6k-download\" target=\"_blank\"\u003e \u003csvg aria-hidden=\"true\" stroke-linejoin=\"round\" stroke-linecap=\"round\" stroke-width=\"1.7\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\"\u003e\u003cpath d=\"M12 3v12M7 10l5 5 5-5M4 19h16\"\u003e\u003c\/path\u003e\u003c\/svg\u003e Spec Sheet \u003c\/a\u003e \u003ca rel=\"noopener\" href=\"https:\/\/bigbattery.com\/wp-content\/uploads\/2024\/06\/EG4-6000XP-Manual.pdf\" class=\"nx6k-download\" target=\"_blank\"\u003e \u003csvg aria-hidden=\"true\" stroke-linejoin=\"round\" stroke-linecap=\"round\" stroke-width=\"1.7\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\"\u003e\u003cpath d=\"M12 3v12M7 10l5 5 5-5M4 19h16\"\u003e\u003c\/path\u003e\u003c\/svg\u003e User Manual \u003c\/a\u003e \u003ca rel=\"noopener\" href=\"https:\/\/bigbattery.com\/wp-content\/uploads\/2024\/06\/EG4%C2%AE-6000XP-Monitoring-System-Working-Modes.pdf\" class=\"nx6k-download\" target=\"_blank\"\u003e \u003csvg aria-hidden=\"true\" stroke-linejoin=\"round\" stroke-linecap=\"round\" stroke-width=\"1.7\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\"\u003e\u003cpath d=\"M12 3v12M7 10l5 5 5-5M4 19h16\"\u003e\u003c\/path\u003e\u003c\/svg\u003e Monitoring System Guide \u003c\/a\u003e \u003ca rel=\"noopener\" href=\"https:\/\/bigbattery.com\/wp-content\/uploads\/2024\/06\/4G-Monitoring-Adapter-Installation-Guide.pdf\" class=\"nx6k-download\" target=\"_blank\"\u003e \u003csvg aria-hidden=\"true\" stroke-linejoin=\"round\" stroke-linecap=\"round\" stroke-width=\"1.7\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\"\u003e\u003cpath d=\"M12 3v12M7 10l5 5 5-5M4 19h16\"\u003e\u003c\/path\u003e\u003c\/svg\u003e Monitoring Adapter Install Guide \u003c\/a\u003e \u003ca rel=\"noopener\" href=\"https:\/\/bigbattery.com\/wp-content\/uploads\/2024\/06\/EG4-6000XP-UL1741-Certificate-of-Compliance.pdf\" class=\"nx6k-download\" target=\"_blank\"\u003e \u003csvg aria-hidden=\"true\" stroke-linejoin=\"round\" stroke-linecap=\"round\" stroke-width=\"1.7\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\"\u003e\u003cpath d=\"M12 3v12M7 10l5 5 5-5M4 19h16\"\u003e\u003c\/path\u003e\u003c\/svg\u003e UL1741 Certificate \u003c\/a\u003e \u003ca rel=\"noopener\" href=\"https:\/\/bigbattery.com\/wp-content\/uploads\/2024\/07\/EG4-6000XP-Warranty-Document-1.0.0.pdf\" class=\"nx6k-download\" target=\"_blank\"\u003e \u003csvg aria-hidden=\"true\" stroke-linejoin=\"round\" stroke-linecap=\"round\" stroke-width=\"1.7\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\"\u003e\u003cpath d=\"M12 3v12M7 10l5 5 5-5M4 19h16\"\u003e\u003c\/path\u003e\u003c\/svg\u003e Warranty Document \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c!-- ============ FOOTER ============ --\u003e\n\u003csection class=\"nx6k-footer\"\u003e\n\u003cp class=\"nx6k-warranty\"\u003eBattery backed by a \u003cstrong\u003e12-year manufacturer's warranty\u003c\/strong\u003e; inverter backed by a \u003cstrong\u003e10-year manufacturer's warranty\u003c\/strong\u003e — both covering defects in materials and workmanship.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e","brand":"BigBattery","offers":[{"title":"Default Title","offer_id":42333721165879,"sku":"K0152","price":4544.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0566\/2418\/5399\/files\/EG4-6000XP-NEXUS-1-1.webp?v=1785059766","url":"https:\/\/ecosolarkits.com\/products\/nexus-48v-14-3kwh-lifepo4-battery-eg4-6-000xp-inverter-off-grid-home-back-up-system","provider":"Eco Solar Kits","version":"1.0","type":"link"}