{"product_id":"bigbattery-ethos-48v-40-96kwh-battery-1x-eg4-18kpv-12kw-hybrid-inverter-ess-k0753","title":"BigBattery ETHOS 48V 40.96kWh LiFePO4 Battery + 1 x EG4 18kPV Hybrid Inverter ESS | 12kW Output, 18kW PV | UL9540 Whole-Home Backup | K0753","description":"\u003cdiv class=\"esk-jk-pd\"\u003e\n\u003cdiv class=\"esk-hero\"\u003e\n\u003cp class=\"esk-eyebrow\"\u003eEnergy Storage System · 12kW · 40.96kWh · 18kW PV\u003c\/p\u003e\n\u003ch2\u003e40.96kWh of Stackable LiFePO4 Storage with 12kW of Hybrid Inverter Power\u003c\/h2\u003e\n\u003cp class=\"esk-lead\"\u003eA UL 9540 certified whole-home energy storage system: 8 stackable ETHOS 48V LiFePO4 modules (40.96kWh, 8 modules) matched with 1 EG4 18kPV hybrid inverter for 12kW of continuous 120\/240V split-phase output and up to 18kW of solar input.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esk-rays\"\u003e\u003csvg viewbox=\"0 0 700 22\" preserveaspectratio=\"none\"\u003e\u003cpath d=\"M0,11 L30,4 M40,11 L65,2 M75,11 L95,5 M110,11 L125,3 M140,11 L160,6\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" fill=\"none\"\u003e\u003c\/path\u003e\u003cpath d=\"M700,11 L670,4 M660,11 L635,2 M625,11 L605,5 M590,11 L575,3 M560,11 L540,6\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" fill=\"none\"\u003e\u003c\/path\u003e\u003ccircle cx=\"350\" cy=\"11\" r=\"9\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003c\/circle\u003e\u003cpath d=\"M300,11 L180,11 M420,11 L520,11\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" fill=\"none\" opacity=\"0.55\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/div\u003e\n\u003cdiv class=\"esk-stats\"\u003e\n\u003cdiv class=\"esk-stat\"\u003e\n\u003cspan class=\"num\"\u003e12kW\u003c\/span\u003e\u003cspan class=\"lbl\"\u003eContinuous AC Output\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esk-stat\"\u003e\n\u003cspan class=\"num\"\u003e40.96kWh\u003c\/span\u003e\u003cspan class=\"lbl\"\u003eLiFePO4 Storage\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esk-stat\"\u003e\n\u003cspan class=\"num\"\u003e18kW\u003c\/span\u003e\u003cspan class=\"lbl\"\u003eMax Solar Input\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esk-stat\"\u003e\n\u003cspan class=\"num\"\u003e12 Years\u003c\/span\u003e\u003cspan class=\"lbl\"\u003eBattery Warranty\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cfigure class=\"esk-banner\" style=\"padding-top:32px\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0566\/2418\/5399\/files\/bigbattery-ethos-kit-K0753.webp?v=1789927252\u0026amp;width=1400\" alt=\"BigBattery ETHOS + EG4 18kPV energy storage system kit K0753 - 8 battery modules and 1 inverter(s)\" width=\"1400\" height=\"876\" loading=\"lazy\" decoding=\"async\"\u003e\u003c\/figure\u003e\u003csection class=\"esk-overview\"\u003e\u003cspan class=\"esk-eyebrow-sm\"\u003eOverview\u003c\/span\u003e\u003ch2\u003eK0753 Overview\u003c\/h2\u003e\n\u003cp\u003eThe K0753 configuration of the BigBattery ETHOS + EG4 18kPV ESS combines 8 ETHOS 5.12kWh battery modules with 1 EG4 18kPV hybrid inverter. ETHOS modules stack on a rack base with a control box on top - no wall mounting, no rack cabinet - so 40.96kWh of storage installs in a footprint of 26.5 x 6.7 inches per stack. Every stack is IP65 \/ NEMA 4X rated and the batteries are UL1973, UL9540A and UN38.3 certified; together with the 18kPV the system is UL 9540 listed, which is what most utilities and inspectors now require for permitted home storage.\u003c\/p\u003e\n\u003cp\u003eEach EG4 18kPV supplies 12,000W of continuous 120\/240V split-phase power (15,500W surge with PV), accepts 18kW of solar on three MPPTs, and passes through 200A of grid power. It works on-grid with export or zero-export, off-grid, or as backup, and talks to the ETHOS control box in closed loop so charging current, state of charge and protection are coordinated automatically. A second and third inverter can be added later for 24kW or 36kW.\u003c\/p\u003e\n\u003cp\u003e40.96kWh is roughly 1.9 days of typical household consumption (22kWh\/day) without sun, and the ETHOS platform scales past 80kWh by adding modules to each control box (up to 16 per box). BigBattery ships from Texas with a 12-year battery warranty, a 10-year inverter warranty and lifetime US-based technical support. Solar panels and racking are not included - pair the system with any 100-600Vdc PV array up to 18kW.\u003c\/p\u003e\n\u003cp\u003eBrowse all \u003ca href=\"\/collections\/bigbattery-kits\" title=\"BigBattery Kits\"\u003eBigBattery backup systems\u003c\/a\u003e, \u003ca href=\"\/collections\/bigbattery-batteries\" title=\"BigBattery Batteries\"\u003eBigBattery lithium batteries\u003c\/a\u003e and \u003ca href=\"\/collections\/eg4-inverters\" title=\"EG4 Inverters\"\u003eEG4 inverters\u003c\/a\u003e.\u003c\/p\u003e\u003c\/section\u003e\u003cfigure class=\"esk-banner\" style=\"padding-top:32px\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0566\/2418\/5399\/files\/bigbattery-ethos-bb-kit.webp?v=1789927251\u0026amp;width=1400\" alt=\"BigBattery ETHOS 48V 5.12kWh battery module - what is in the box\" width=\"1400\" height=\"876\" loading=\"lazy\" decoding=\"async\"\u003e\u003c\/figure\u003e\u003csection class=\"esk-features alt\"\u003e\u003cspan class=\"esk-eyebrow-sm\"\u003eFeatures\u003c\/span\u003e\u003ch2\u003eK0753 Key Features\u003c\/h2\u003e\n\u003cdiv class=\"esk-feat-grid\"\u003e\n\u003cdiv class=\"esk-feat\"\u003e\n\u003cspan class=\"idx\"\u003e01\u003c\/span\u003e\u003ch3\u003eUL 9540 certified ESS\u003c\/h3\u003e\n\u003cp\u003eETHOS battery and EG4 18kPV are certified together as a complete energy storage system, with UL9540A fire-safety testing, UL1973 and UN38.3 on the battery.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esk-feat\"\u003e\n\u003cspan class=\"idx\"\u003e02\u003c\/span\u003e\u003ch3\u003e40.96kWh stackable LiFePO4\u003c\/h3\u003e\n\u003cp\u003e8 modules of 5.12kWh \/ 100Ah each, 6,000+ cycles, 16S cells and a smart BMS in every module; expand to 80+ kWh by adding modules.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esk-feat\"\u003e\n\u003cspan class=\"idx\"\u003e03\u003c\/span\u003e\u003ch3\u003e12kW hybrid power, 18kW solar\u003c\/h3\u003e\n\u003cp\u003eEG4 18kPV: 12kW per unit, three MPPTs, 100-600Vdc input, 200A pass-through, generator input, RSD support and Wi-Fi monitoring.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esk-feat\"\u003e\n\u003cspan class=\"idx\"\u003e04\u003c\/span\u003e\u003ch3\u003eClosed-loop communication\u003c\/h3\u003e\n\u003cp\u003eCANBus link between control box and inverter for coordinated charging, accurate state of charge and protection.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esk-feat\"\u003e\n\u003cspan class=\"idx\"\u003e05\u003c\/span\u003e\u003ch3\u003eIP65 \/ NEMA 4X\u003c\/h3\u003e\n\u003cp\u003eBattery stacks and inverter are weather rated for garages, covered patios and utility areas.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esk-feat\"\u003e\n\u003cspan class=\"idx\"\u003e06\u003c\/span\u003e\u003ch3\u003eFast, maintenance-free installation\u003c\/h3\u003e\n\u003cp\u003eStack, connect the included cables, and go - no routine servicing, 12-year battery and 10-year inverter warranties.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003cfigure class=\"esk-banner\" style=\"padding-top:32px\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0566\/2418\/5399\/files\/bigbattery-ethos-bb-install.jpg?v=1789927251\u0026amp;width=1400\" alt=\"Customer installation - EG4 hybrid inverter with stacked BigBattery ETHOS modules in a utility room\" width=\"1400\" height=\"1867\" loading=\"lazy\" decoding=\"async\"\u003e\u003c\/figure\u003e\u003csection class=\"esk-box\"\u003e\u003cspan class=\"esk-eyebrow-sm\"\u003eIncluded\u003c\/span\u003e\u003ch2\u003eWhat's in the Kit\u003c\/h2\u003e\n\u003cul class=\"esk-box-list\"\u003e\n\u003cli\u003e\n\u003cspan class=\"qty\"\u003e8×\u003c\/span\u003e\u003cspan\u003eBigBattery ETHOS 48V 5.12kWh stackable LiFePO4 battery module\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"qty\"\u003e1×\u003c\/span\u003e\u003cspan\u003eETHOS control box\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"qty\"\u003e2×\u003c\/span\u003e\u003cspan\u003eETHOS rack base\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"qty\"\u003e1×\u003c\/span\u003e\u003cspan\u003eEG4 18kPV all-in-one hybrid solar inverter (18kW PV \/ 12kW AC)\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"qty\"\u003e1×\u003c\/span\u003e\u003cspan\u003e10kWh ETHOS controller-to-battery cable\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"qty\"\u003e2×\u003c\/span\u003e\u003cspan\u003eETHOS stack-to-stack comm cable (4.9 ft)\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"qty\"\u003e4×\u003c\/span\u003e\u003cspan\u003eETHOS stack-to-stack power cable pair (4.9 ft)\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"qty\"\u003e2×\u003c\/span\u003e\u003cspan\u003eETHOS battery top plate cover\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/section\u003e\u003cfigure class=\"esk-banner\" style=\"padding-top:32px\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0566\/2418\/5399\/files\/bigbattery-ethos-bb-inv-open.webp?v=1789927250\u0026amp;width=1400\" alt=\"EG4 18kPV hybrid inverter with wiring compartment open\" width=\"1400\" height=\"876\" loading=\"lazy\" decoding=\"async\"\u003e\u003c\/figure\u003e\u003csection class=\"esk-runtime alt\"\u003e\u003cspan class=\"esk-eyebrow-sm\"\u003eRuntime\u003c\/span\u003e\u003ch2\u003eWhat 40.96kWh of storage can run\u003c\/h2\u003e\n\u003cp class=\"esk-note\"\u003eEstimates assume 85% usable energy and typical load ratings; actual runtime depends on your appliances, weather and settings.\u003c\/p\u003e\n\u003cdiv class=\"esk-run-grid\"\u003e\n\u003cdiv class=\"esk-run\"\u003e\n\u003cspan class=\"val\"\u003e~1.9 days\u003c\/span\u003e\u003cspan class=\"dev\"\u003eTypical home (22kWh\/day), no sun\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esk-run\"\u003e\n\u003cspan class=\"val\"\u003e~14 hours\u003c\/span\u003e\u003cspan class=\"dev\"\u003eCentral AC 3-ton (3kW) continuous\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esk-run\"\u003e\n\u003cspan class=\"val\"\u003e~41 hours\u003c\/span\u003e\u003cspan class=\"dev\"\u003eRefrigerator + freezer (1kW)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esk-run\"\u003e\n\u003cspan class=\"val\"\u003e12kW\u003c\/span\u003e\u003cspan class=\"dev\"\u003eContinuous output, whole-house loads\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"esk-faqs\"\u003e\u003cspan class=\"esk-eyebrow-sm\"\u003eFAQ\u003c\/span\u003e\u003ch2\u003eK0753 Common Questions\u003c\/h2\u003e\n\u003cdiv class=\"esk-faq-grid\"\u003e\n\u003cdiv class=\"esk-faq\"\u003e\n\u003cspan class=\"idx\"\u003eQ1\u003c\/span\u003e\u003ch3\u003eHow long will 40.96kWh power my home?\u003c\/h3\u003e\n\u003cp\u003eAbout 1.9 days for a typical 22kWh\/day home with no solar input; with solar panels connected to the 18kPV (up to 18kW) the batteries recharge daily.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esk-faq\"\u003e\n\u003cspan class=\"idx\"\u003eQ2\u003c\/span\u003e\u003ch3\u003eDoes the kit include solar panels?\u003c\/h3\u003e\n\u003cp\u003eNo. This is a battery + inverter ESS. Connect any PV array within the inverter limits (100-600Vdc, 18kW per inverter), or run it as grid-charged backup without solar.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esk-faq\"\u003e\n\u003cspan class=\"idx\"\u003eQ3\u003c\/span\u003e\u003ch3\u003eIs it grid-tied or off-grid?\u003c\/h3\u003e\n\u003cp\u003eBoth. The EG4 18kPV is UL1741 certified for grid interaction (export or zero-export) and also runs fully off-grid; it has a generator input as well.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esk-faq\"\u003e\n\u003cspan class=\"idx\"\u003eQ4\u003c\/span\u003e\u003ch3\u003eCan I add more batteries later?\u003c\/h3\u003e\n\u003cp\u003eYes. Each ETHOS control box supports up to 16 modules, and BigBattery sells single ETHOS modules, so the system can grow past 80kWh.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esk-faq\"\u003e\n\u003cspan class=\"idx\"\u003eQ5\u003c\/span\u003e\u003ch3\u003eDoes it ship free?\u003c\/h3\u003e\n\u003cp\u003eYes - free freight shipping within the contiguous USA, $0 sales tax in most states, and the ECO100 code takes another $100 off at checkout.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"esk-specs alt\"\u003e\u003cspan class=\"esk-eyebrow-sm\"\u003eData\u003c\/span\u003e\u003ch2\u003eK0753 Specifications\u003c\/h2\u003e\n\u003cdiv class=\"esk-specs-block\"\u003e\n\u003cp class=\"esk-specs-block-title\"\u003eBigBattery ETHOS 48V 5.12kWh Stackable Battery Module (per module)\u003c\/p\u003e\n\u003cdiv class=\"esk-spec-groups\"\u003e\n\u003cdiv class=\"esk-spec-group\"\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr class=\"grp\"\u003e\u003ctd colspan=\"2\"\u003eBattery\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem voltage\u003c\/td\u003e\n\u003ctd\u003e48V (51.2V nominal)\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\u003eCapacity per module\u003c\/td\u003e\n\u003ctd\u003e5.12kWh \/ 100Ah\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCell configuration\u003c\/td\u003e\n\u003ctd\u003e16S per module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCharging voltage range\u003c\/td\u003e\n\u003ctd\u003e55.6-57V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax charge voltage\u003c\/td\u003e\n\u003ctd\u003e57V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating voltage range\u003c\/td\u003e\n\u003ctd\u003e48-57V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSuggested low-voltage cutoff\u003c\/td\u003e\n\u003ctd\u003e48-50.8V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMS cutoff range\u003c\/td\u003e\n\u003ctd\u003e42-47V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax continuous discharge current\u003c\/td\u003e\n\u003ctd\u003e100A per module (200A per control box)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax discharge peak current\u003c\/td\u003e\n\u003ctd\u003e300A (max 5 seconds)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax charge current\u003c\/td\u003e\n\u003ctd\u003e200A per control box\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCycle life\u003c\/td\u003e\n\u003ctd\u003e6,000+ cycles\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/div\u003e\n\u003cdiv class=\"esk-spec-group\"\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr class=\"grp\"\u003e\u003ctd colspan=\"2\"\u003eGeneral\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCharge temperature\u003c\/td\u003e\n\u003ctd\u003e32-113°F (0-45°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDischarge temperature\u003c\/td\u003e\n\u003ctd\u003e-4-140°F (-20-60°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptimal discharge temperature\u003c\/td\u003e\n\u003ctd\u003e59-95°F (15-35°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage (SoC \u0026gt;50%)\u003c\/td\u003e\n\u003ctd\u003e-4-113°F, max 6 months\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule footprint\u003c\/td\u003e\n\u003ctd\u003e26.5 in W x 6.7 in D (674 x 170 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax connections\u003c\/td\u003e\n\u003ctd\u003eUp to 16 modules per control box\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection rating\u003c\/td\u003e\n\u003ctd\u003eIP65 \/ NEMA 4X\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunications\u003c\/td\u003e\n\u003ctd\u003eCANBus \/ RS485 (closed-loop with EG4 18kPV)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd\u003eUL9540, UL9540A, UL1973, UN38.3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e12 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esk-specs-block\"\u003e\n\u003cp class=\"esk-specs-block-title\"\u003eEG4 18kPV All-in-One Hybrid Inverter (per inverter)\u003c\/p\u003e\n\u003cdiv class=\"esk-spec-groups\"\u003e\n\u003cdiv class=\"esk-spec-group\"\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr class=\"grp\"\u003e\u003ctd colspan=\"2\"\u003eAC Output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput power\u003c\/td\u003e\n\u003ctd\u003e12,000W continuous\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput voltage\u003c\/td\u003e\n\u003ctd\u003e120\/240Vac split-phase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax continuous output current\u003c\/td\u003e\n\u003ctd\u003e50A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax continuous line wattage\u003c\/td\u003e\n\u003ctd\u003e8,000W per 120V leg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSurge with PV\u003c\/td\u003e\n\u003ctd\u003e14,700W (10 min) \/ 15,500W (5 min)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSurge without PV\u003c\/td\u003e\n\u003ctd\u003e13,500W (10 min)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower factor\u003c\/td\u003e\n\u003ctd\u003e0.99 (full load)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTHD\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;5% (full load)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransfer time\u003c\/td\u003e\n\u003ctd\u003e10-20ms (single) \/ 20ms (parallel)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax parallel\u003c\/td\u003e\n\u003ctd\u003e10 units\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"grp\"\u003e\u003ctd colspan=\"2\"\u003eAC Input\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGrid input\u003c\/td\u003e\n\u003ctd\u003e120\/240Vac, 50\/60Hz, 180-270Vac\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax AC input power\u003c\/td\u003e\n\u003ctd\u003e12,000W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax AC bypass\u003c\/td\u003e\n\u003ctd\u003e200A (grid) \/ 90A (generator)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/div\u003e\n\u003cdiv class=\"esk-spec-group\"\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr class=\"grp\"\u003e\u003ctd colspan=\"2\"\u003ePV Input\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMPPT trackers\u003c\/td\u003e\n\u003ctd\u003e3 (2 inputs on MPPT 1, 1 each on MPPT 2 and 3)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax PV array power\u003c\/td\u003e\n\u003ctd\u003e18,000W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax input current\u003c\/td\u003e\n\u003ctd\u003e25A (MPPT 1) \/ 15A (MPPT 2 and 3)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDC input voltage range\u003c\/td\u003e\n\u003ctd\u003e100-600Vdc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStart-up voltage\u003c\/td\u003e\n\u003ctd\u003e100Vdc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMPPT operating range\u003c\/td\u003e\n\u003ctd\u003e140-500Vdc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax efficiency\u003c\/td\u003e\n\u003ctd\u003e94-99.9%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"grp\"\u003e\u003ctd colspan=\"2\"\u003eBattery and General\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery voltage\u003c\/td\u003e\n\u003ctd\u003e48Vdc nominal, 40-60Vdc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax charge \/ discharge current\u003c\/td\u003e\n\u003ctd\u003e250A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIdle consumption\u003c\/td\u003e\n\u003ctd\u003e~70W normal \/ ~18W standby\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating temperature\u003c\/td\u003e\n\u003ctd\u003e-13 to 140°F (-25 to 60°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAltitude\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;6,561 ft (2,000 m)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNoise\u003c\/td\u003e\n\u003ctd\u003e68dB at 3 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection rating\u003c\/td\u003e\n\u003ctd\u003eIP65 \/ NEMA 4X\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunications\u003c\/td\u003e\n\u003ctd\u003eRS485 \/ CANBus \/ Wi-Fi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e20.5 x 11.2 x 34.3 in (520 x 285 x 871 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e121 lb (55 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"esk-downloads alt\"\u003e\u003cspan class=\"esk-eyebrow-sm\"\u003eAdditional Documentation\u003c\/span\u003e\u003ch2\u003eDocuments \u0026amp; Downloads\u003c\/h2\u003e\n\u003cdiv class=\"esk-download-list\"\u003e\n\u003ca class=\"esk-download\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0566\/2418\/5399\/files\/bigbattery-ETHOS-SpecSheet-1.4-BatteryCB.pdf?v=1789927251\" target=\"_blank\" rel=\"noopener\"\u003e\u003csvg viewbox=\"0 0 24 24\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"M12 3v11\" stroke=\"currentColor\" stroke-width=\"2\" fill=\"none\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003cpath d=\"m8 10 4 4 4-4\" stroke=\"currentColor\" stroke-width=\"2\" fill=\"none\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\u003e\u003c\/path\u003e\u003cpath d=\"M5 17v3h14v-3\" stroke=\"currentColor\" stroke-width=\"2\" fill=\"none\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003c\/svg\u003e ETHOS Battery Spec Sheet (PDF)\u003c\/a\u003e\u003ca class=\"esk-download\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0566\/2418\/5399\/files\/bigbattery-BB-x-EG4-08_11-ETHOS-ESS-USER-MANUAL.pdf?v=1789927252\" target=\"_blank\" rel=\"noopener\"\u003e\u003csvg viewbox=\"0 0 24 24\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"M12 3v11\" stroke=\"currentColor\" stroke-width=\"2\" fill=\"none\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003cpath d=\"m8 10 4 4 4-4\" stroke=\"currentColor\" stroke-width=\"2\" fill=\"none\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\u003e\u003c\/path\u003e\u003cpath d=\"M5 17v3h14v-3\" stroke=\"currentColor\" stroke-width=\"2\" fill=\"none\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003c\/svg\u003e ETHOS + EG4 ESS User Manual (PDF)\u003c\/a\u003e\u003ca class=\"esk-download\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0566\/2418\/5399\/files\/bigbattery-UL9540A-Certificate-1.pdf?v=1789927251\" target=\"_blank\" rel=\"noopener\"\u003e\u003csvg viewbox=\"0 0 24 24\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"M12 3v11\" stroke=\"currentColor\" stroke-width=\"2\" fill=\"none\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003cpath d=\"m8 10 4 4 4-4\" stroke=\"currentColor\" stroke-width=\"2\" fill=\"none\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\u003e\u003c\/path\u003e\u003cpath d=\"M5 17v3h14v-3\" stroke=\"currentColor\" stroke-width=\"2\" fill=\"none\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003c\/svg\u003e ETHOS UL9540A Certificate (PDF)\u003c\/a\u003e\u003ca class=\"esk-download\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0566\/2418\/5399\/files\/bigbattery-UL1973-ETHOS.pdf?v=1789927251\" target=\"_blank\" rel=\"noopener\"\u003e\u003csvg viewbox=\"0 0 24 24\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"M12 3v11\" stroke=\"currentColor\" stroke-width=\"2\" fill=\"none\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003cpath d=\"m8 10 4 4 4-4\" stroke=\"currentColor\" stroke-width=\"2\" fill=\"none\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\u003e\u003c\/path\u003e\u003cpath d=\"M5 17v3h14v-3\" stroke=\"currentColor\" stroke-width=\"2\" fill=\"none\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003c\/svg\u003e ETHOS UL1973 Certificate (PDF)\u003c\/a\u003e\u003ca class=\"esk-download\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0566\/2418\/5399\/files\/bigbattery-48V-ETHOS-DOC-UN38.3.pdf?v=1789927252\" target=\"_blank\" rel=\"noopener\"\u003e\u003csvg viewbox=\"0 0 24 24\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"M12 3v11\" stroke=\"currentColor\" stroke-width=\"2\" fill=\"none\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003cpath d=\"m8 10 4 4 4-4\" stroke=\"currentColor\" stroke-width=\"2\" fill=\"none\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\u003e\u003c\/path\u003e\u003cpath d=\"M5 17v3h14v-3\" stroke=\"currentColor\" stroke-width=\"2\" fill=\"none\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003c\/svg\u003e ETHOS UN38.3 Certificate (PDF)\u003c\/a\u003e\u003ca class=\"esk-download\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0566\/2418\/5399\/files\/bigbattery-SDS_BigBattery_LFP-1.pdf?v=1789927252\" target=\"_blank\" rel=\"noopener\"\u003e\u003csvg viewbox=\"0 0 24 24\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"M12 3v11\" stroke=\"currentColor\" stroke-width=\"2\" fill=\"none\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003cpath d=\"m8 10 4 4 4-4\" stroke=\"currentColor\" stroke-width=\"2\" fill=\"none\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\u003e\u003c\/path\u003e\u003cpath d=\"M5 17v3h14v-3\" stroke=\"currentColor\" stroke-width=\"2\" fill=\"none\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003c\/svg\u003e BigBattery LFP Safety Data Sheet (PDF)\u003c\/a\u003e\u003ca class=\"esk-download\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0566\/2418\/5399\/files\/bigbattery-EG4-18KPV-12LV-Spec-Sheet.pdf?v=1789927253\" target=\"_blank\" rel=\"noopener\"\u003e\u003csvg viewbox=\"0 0 24 24\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"M12 3v11\" stroke=\"currentColor\" stroke-width=\"2\" fill=\"none\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003cpath d=\"m8 10 4 4 4-4\" stroke=\"currentColor\" stroke-width=\"2\" fill=\"none\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\u003e\u003c\/path\u003e\u003cpath d=\"M5 17v3h14v-3\" stroke=\"currentColor\" stroke-width=\"2\" fill=\"none\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003c\/svg\u003e EG4 18kPV Spec Sheet (PDF)\u003c\/a\u003e\u003ca class=\"esk-download\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0566\/2418\/5399\/files\/bigbattery-EG4-18KPV-12LV-Manual-1.pdf?v=1789927252\" target=\"_blank\" rel=\"noopener\"\u003e\u003csvg viewbox=\"0 0 24 24\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"M12 3v11\" stroke=\"currentColor\" stroke-width=\"2\" fill=\"none\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003cpath d=\"m8 10 4 4 4-4\" stroke=\"currentColor\" stroke-width=\"2\" fill=\"none\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\u003e\u003c\/path\u003e\u003cpath d=\"M5 17v3h14v-3\" stroke=\"currentColor\" stroke-width=\"2\" fill=\"none\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003c\/svg\u003e EG4 18kPV User Manual (PDF)\u003c\/a\u003e\u003ca class=\"esk-download\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0566\/2418\/5399\/files\/bigbattery-EG4-18KPV-12LV-Certification.pdf?v=1789927252\" target=\"_blank\" rel=\"noopener\"\u003e\u003csvg viewbox=\"0 0 24 24\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"M12 3v11\" stroke=\"currentColor\" stroke-width=\"2\" fill=\"none\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003cpath d=\"m8 10 4 4 4-4\" stroke=\"currentColor\" stroke-width=\"2\" fill=\"none\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\u003e\u003c\/path\u003e\u003cpath d=\"M5 17v3h14v-3\" stroke=\"currentColor\" stroke-width=\"2\" fill=\"none\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003c\/svg\u003e EG4 18kPV UL1741 Certificate (PDF)\u003c\/a\u003e\u003ca class=\"esk-download\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0566\/2418\/5399\/files\/bigbattery-RSD-Initiator-Install-Instructions-EG4-18kPV-Version-1-External.pdf?v=1789927252\" target=\"_blank\" rel=\"noopener\"\u003e\u003csvg viewbox=\"0 0 24 24\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"M12 3v11\" stroke=\"currentColor\" stroke-width=\"2\" fill=\"none\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003cpath d=\"m8 10 4 4 4-4\" stroke=\"currentColor\" stroke-width=\"2\" fill=\"none\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\u003e\u003c\/path\u003e\u003cpath d=\"M5 17v3h14v-3\" stroke=\"currentColor\" stroke-width=\"2\" fill=\"none\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003c\/svg\u003e EG4 18kPV Rapid Shutdown Wiring Guide (PDF)\u003c\/a\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003cdiv class=\"esk-footer\"\u003e\u003cp\u003e\u003cstrong\u003eFree shipping\u003c\/strong\u003e within the contiguous USA · \u003cstrong\u003e$0 sales tax\u003c\/strong\u003e in most states · Questions? Call \u003ca href=\"tel:+13073177213\"\u003e+1 307 317 7213\u003c\/a\u003e\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"BigBattery","offers":[{"title":"Default Title","offer_id":50214628098103,"sku":"K0753","price":13087.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0566\/2418\/5399\/files\/41-kWh-x8-Batteries-KIT0753-V3.webp?v=1789927941","url":"https:\/\/ecosolarkits.com\/products\/bigbattery-ethos-48v-40-96kwh-battery-1x-eg4-18kpv-12kw-hybrid-inverter-ess-k0753","provider":"Eco Solar Kits","version":"1.0","type":"link"}