{"product_id":"eg4-280ah-all-weather-flexboss21-ess","title":"EG4 280Ah All Weather + FLEXBOSS21 (ESS)","description":"\u003ch2 class=\"product_title entry-title\" style=\"text-align: center;\"\u003e\u003cspan style=\"color: rgb(50, 149, 66);\"\u003e\u003cstrong\u003eEG4 Wallmount All Weather Battery \u0026amp; FlexBoss21 Hybrid Inverter (ESS) | 14.3-85.8kWh | UL9540 | Grid-Tied Home Solar System (21kW-63kW PV)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch3 class=\"content__summary-title\"\u003eProduct Summary:\u003c\/h3\u003e\n\u003cdiv class=\"woocommerce-product-details__short-description\"\u003e\n\u003cp data-start=\"194\" data-end=\"565\"\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-start=\"203\" data-end=\"264\"\u003eEG4 280Ah All-Weather Battery + EG4 FlexBOSS21 ESS System\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis a powerful, all-in-one energy solution designed for both\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-start=\"325\" data-end=\"362\"\u003eon-grid and off-grid applications\u003c\/strong\u003e. Combining the rugged\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-start=\"385\" data-end=\"428\"\u003e14.3kWh EG4 All-Weather LiFePO₄ battery\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ewith the high-performance\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-start=\"455\" data-end=\"485\"\u003eFlexBOSS21 hybrid inverter\u003c\/strong\u003e, this system delivers reliable, scalable, and intelligent energy management for residential and commercial use.\u003c\/p\u003e\n\u003cdiv class=\"bb-see-more\" id=\"bb-see-more-1\"\u003e\n\u003cdiv class=\"bb-see-more-content\"\u003e\n\u003cp data-start=\"567\" data-end=\"956\"\u003eThe FlexBOSS21 provides\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-start=\"623\" data-end=\"638\"\u003e12kW output\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eand up to\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-start=\"649\" data-end=\"669\"\u003e21,000W PV input\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ewith\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-start=\"675\" data-end=\"686\"\u003e3 MPPTs\u003c\/strong\u003e, enabling maximum solar production and system flexibility. Paired with the durable All-Weather battery – featuring\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-start=\"800\" data-end=\"821\"\u003e8,000+ cycle life\u003c\/strong\u003e,\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-start=\"823\" data-end=\"850\"\u003eintegrated self-heating\u003c\/strong\u003e, and advanced safety protections – this system is built to perform in demanding environments.\u003c\/p\u003e\n\u003cp data-start=\"958\" data-end=\"1195\"\u003eDesigned with \u003cstrong data-start=\"793\" data-end=\"829\"\u003eUL 9540 certified configurations\u003c\/strong\u003e, advanced battery management, and \u003cstrong data-start=\"864\" data-end=\"894\"\u003eU.S.-engineered components\u003c\/strong\u003e, this system ensures safe, maintenance-free performance with seamless closed-loop communication between battery and inverter.\u003c\/p\u003e\n\u003cp data-start=\"1197\" data-end=\"1334\"\u003e\u003cstrong data-start=\"1219\" data-end=\"1234\"\u003eShips From:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eTexas, USA\u003cbr data-start=\"1250\" data-end=\"1253\"\u003e\u003cstrong data-start=\"1253\" data-end=\"1266\"\u003eWarranty:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e10 Years (Battery), 10 Years (Inverter)\u003cbr data-start=\"1285\" data-end=\"1288\"\u003e\u003cstrong data-start=\"1288\" data-end=\"1300\"\u003eSupport:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eLifetime USA-Based Tech Support\u003c\/p\u003e\n\u003ch3 data-section-id=\"18fxkdn\" data-start=\"1341\" data-end=\"1361\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"1344\" data-end=\"1361\"\u003eCompatibility\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp data-start=\"1323\" data-end=\"1357\"\u003e\u003cstrong data-start=\"1323\" data-end=\"1357\"\u003eIntegrated \u0026amp; Optimized System:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"1358\" data-end=\"1424\"\u003e\n\u003cli data-section-id=\"1ta07ll\" data-start=\"1358\" data-end=\"1424\"\u003eEG4 280Ah All-Weather Battery + EG4 FlexBOSS21 Hybrid Inverter\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"1426\" data-end=\"1452\"\u003e\u003cstrong data-start=\"1426\" data-end=\"1452\"\u003eExpandable \u0026amp; Flexible:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul data-start=\"1453\" data-end=\"1630\"\u003e\n\u003cli data-section-id=\"x9d47h\" data-start=\"1453\" data-end=\"1512\"\u003eAdd additional batteries for increased storage capacity\u003c\/li\u003e\n\u003cli data-section-id=\"r3gs9b\" data-start=\"1513\" data-end=\"1571\"\u003eSupports grid-tied, hybrid, and off-grid installations\u003c\/li\u003e\n\u003cli data-section-id=\"1fxt2gy\" data-start=\"1572\" data-end=\"1630\"\u003eCompatible with solar + generator input configurations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"1332\" data-end=\"1366\"\u003e\u003cstrong data-start=\"1637\" data-end=\"1653\"\u003eKey Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul data-start=\"1655\" data-end=\"2670\"\u003e\n\u003cli data-section-id=\"1eja3v9\" data-start=\"1658\" data-end=\"1752\"\u003e\n\u003cstrong data-start=\"1660\" data-end=\"1685\"\u003eComplete ESS Solution\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e– Battery + inverter system designed to work seamlessly together\u003c\/li\u003e\n\u003cli data-section-id=\"3kwtc5\" data-start=\"1753\" data-end=\"1835\"\u003e\n\u003cstrong data-start=\"1755\" data-end=\"1775\"\u003e21,000W PV Input\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e– High solar capacity with 3 MPPTs for maximum efficiency\u003c\/li\u003e\n\u003cli data-section-id=\"dlf2qe\" data-start=\"1836\" data-end=\"1911\"\u003e\n\u003cstrong data-start=\"1838\" data-end=\"1859\"\u003e12kW Output Power\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e– Supports residential and light commercial loads\u003c\/li\u003e\n\u003cli data-section-id=\"834tri\" data-start=\"1912\" data-end=\"1983\"\u003e\n\u003cstrong data-start=\"1914\" data-end=\"1941\"\u003e14.3kWh LiFePO₄ Battery\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e– Durable, high-capacity energy storage\u003c\/li\u003e\n\u003cli data-section-id=\"1gzfbpc\" data-start=\"1984\" data-end=\"2047\"\u003e\n\u003cstrong data-start=\"1986\" data-end=\"2007\"\u003e8,000+ Cycle Life\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e– Long-lasting performance at 80% DoD\u003c\/li\u003e\n\u003cli data-section-id=\"1mhh1ke\" data-start=\"2048\" data-end=\"2140\"\u003e\n\u003cstrong data-start=\"2050\" data-end=\"2072\"\u003eAll-Weather Design\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e– Built for reliable operation in indoor and outdoor environments\u003c\/li\u003e\n\u003cli data-section-id=\"1m9zi26\" data-start=\"2141\" data-end=\"2212\"\u003e\n\u003cstrong data-start=\"2143\" data-end=\"2170\"\u003eIntegrated Self-Heating\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e– Reliable performance in cold climates\u003c\/li\u003e\n\u003cli data-section-id=\"av16tp\" data-start=\"2213\" data-end=\"2325\"\u003e\n\u003cstrong data-start=\"2215\" data-end=\"2252\"\u003eAdvanced BMS \u0026amp; Safety Protections\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e– Includes EMP protection, fire safety features, and system safeguards\u003c\/li\u003e\n\u003cli data-section-id=\"1kgcrz\" data-start=\"2326\" data-end=\"2421\"\u003e\n\u003cstrong data-start=\"2328\" data-end=\"2355\"\u003eSmart Energy Management\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e– Supports load control, AC coupling, and generator integration\u003c\/li\u003e\n\u003cli data-section-id=\"j0kfpo\" data-start=\"2422\" data-end=\"2496\"\u003e\n\u003cstrong data-start=\"2424\" data-end=\"2454\"\u003eRemote Monitoring \u0026amp; Alerts\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e– Real-time system tracking and control\u003c\/li\u003e\n\u003cli data-section-id=\"1ph7tfo\" data-start=\"2497\" data-end=\"2563\"\u003e\n\u003cstrong data-start=\"2499\" data-end=\"2529\"\u003eMaintenance-Free Operation\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e– No routine servicing required\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1363\" data-end=\"1397\"\u003eA\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-start=\"2572\" data-end=\"2623\"\u003edurable, high-performance energy storage system\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ebuilt for flexibility, resilience, and long-term energy independence.\u003c\/p\u003e\n\u003ch3 class=\"bb-justify-between\"\u003e\u003cstrong\u003eItems Included- Quantity depends on Your ESS Configuration\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cdiv class=\"bb-items-included-frontend\"\u003e\n\u003cdiv class=\"bb-item-frontend\"\u003e\n\u003cdiv class=\"bb-item-info\"\u003e\n\u003cspan class=\"bb-item-title\"\u003eEG4 WallMount 280Ah All Weather | 48V - 14.3kWh | UL1973 | Home Battery Backup LFP\u003c\/span\u003e\u003cspan class=\"bb-item-sku\"\u003eF\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bb-item-frontend\"\u003e\n\u003cdiv class=\"bb-item-info\"\u003e\u003cspan class=\"bb-item-title\"\u003eEG4 All Weather Conduit Box\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bb-item-frontend\"\u003e\n\u003cdiv class=\"bb-item-info\"\u003e\u003cspan class=\"bb-item-title\"\u003eEG4 FlexBOSS21 Hybrid Solar Inverter | 21kW PV \/ 16kW AC | Split-Phase | 4-MPPT | Scalable | Remote Wi-Fi Monitoring\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch5 class=\"MsoNormal\"\u003e\u003cb\u003e\u003cspan style=\"font-size: 10.0pt;\"\u003eDownloads \u0026amp; Specifications\u003c\/span\u003e\u003c\/b\u003e\u003c\/h5\u003e\n\u003cp class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-outline-level: 2;\"\u003e\u003cb\u003e\u003cspan style=\"font-size: 18.0pt;\"\u003eBattery Specifications\u003c\/span\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eNominal Voltage:\u003c\/b\u003e51.2V\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eChemistry:Lithium\u003c\/b\u003e Iron Phosphate (LiFePO4)\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003ekWh Capacity:\u003c\/b\u003e14.3kWh\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eAh Capacity:\u003c\/b\u003e280Ah\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eBMS Charging Voltage (Bulk\/Absorb)\u003c\/b\u003e:56.0V (±0.8V)\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eRec. Charging Voltage (Bulk\/Absorb)\u003c\/b\u003e:56.2V (±0.2V)\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eRec. Float Setting:\u003c\/b\u003e54V (±0.2V)\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eRec. SoC Cutoff Setting:\u003c\/b\u003e20%\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eMax. Continuous Charge Current:\u003c\/b\u003e140A\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eMax. Continuous Discharge Current:\u003c\/b\u003e140A (200A Max. Continuous for 30 min)\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eRec. Charge Current:\u003c\/b\u003e60 – 140A\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eRec. Discharge Current:\u003c\/b\u003e60 – 140A\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eMax Continuous Discharge Rate:\u003c\/b\u003e10,240W\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eVoltage:\u003c\/b\u003e56V\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003ePower Consumption:\u003c\/b\u003e224W\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eInternal Temperature Cutoffs:\u003c\/b\u003e≤32ºF (On) | ≥41ºF (Off)\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eCharging Temperature Range:\u003c\/b\u003e32ºF – 122ºF (0ºC – 50ºC)\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eDischarging Temperature Range:\u003c\/b\u003e-4ºF – 131ºF (-20ºC – 55ºC)\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eStorage Temperature Range:\u003c\/b\u003e32ºF – 113ºF (0ºC – 45ºC)\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eOperating Altitude\u003c\/b\u003e:\u0026lt;16,404 ft (\u0026lt;5,000 m)\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eProtection Rating:\u003c\/b\u003eIP65\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eCommunications:\u003c\/b\u003eRS485 | CANBus\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eWeight:\u003c\/b\u003e308.6 lbs (140 kg)\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eDepth:\u003c\/b\u003e9.1 in (232 mm)\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eWidth:\u003c\/b\u003e22.3 in (566 mm)\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eHeight:\u003c\/b\u003e36.1 in (916 mm)\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-bottom: 3.75pt; mso-line-height-alt: 15.6pt; mso-outline-level: 1; background: white;\"\u003e\u003cb\u003e\u003cspan style=\"font-size: 18.0pt; font-family: 'Inter',serif; color: #165ea0; mso-font-kerning: 18.0pt;\"\u003eFlexBoss21 Hybrid Inverter (ESS)\u003c\/span\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-outline-level: 2;\"\u003e\u003cb\u003e\u003cspan style=\"font-size: 18.0pt;\"\u003eInverter Specifications\u003c\/span\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eNominal AC Voltage:\u003c\/b\u003e120\/240VAC | 120\/208VAC (L1\/L2\/N required)\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eFrequency:\u003c\/b\u003e60 Hz (Default) | 50 Hz\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eMax. AC Current:\u003c\/b\u003e50A @ 240V | 57.7A @ 208V\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eMax. AC Input Power:\u003c\/b\u003e12000W\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eMax. AC Bypass:\u003c\/b\u003e90A\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eOperating Voltage Range:\u003c\/b\u003e180 – 270VAC\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eOutput Voltage:\u003c\/b\u003e120\/240VAC | 120\/208VAC (L1\/L2\/N required)\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eMax. Output Current:\u003c\/b\u003e66.7A\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eOutput Frequency:\u003c\/b\u003e60 Hz (Default) | 50 Hz\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eNominal Output Power (without PV):1\u003c\/b\u003e2000W @ 240V | 12000W @ 208V\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eNominal Output Power (with PV):\u003c\/b\u003e16000W @ 240V | 13800kW @ 208V\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003ePower Factor:\u003c\/b\u003e0.99 (Full Load)\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eReactive Power Adjustment Range:\u003c\/b\u003e-0.8 – 0.8 Leading Adjustable\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eTotal Harmonic Distortion:\u003c\/b\u003e\u0026lt;5% (Full Load)\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eTransfer Time:\u003c\/b\u003e20ms (Default) | 10ms (Configurable) | 20ms (Parallel)\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eRated Output Current:\u003c\/b\u003e50A @ 240V | 57.7A @ 208V\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eNominal Output Voltage:\u003c\/b\u003e120\/240VAC | 120\/208VAC\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eRated Output Power:\u003c\/b\u003e12000W @ 240VAC | 12000W @ 208VAC\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003ePeak Power:\u003c\/b\u003e24000W (0.5 sec) | 18000W (1 sec)\u003cbr\u003e15000W (6 min) | 13200W (12 min)\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eOperating Frequency:\u003c\/b\u003e60 Hz (Default) | 50 Hz\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eTotal Harmonic Distortion Voltage:\u003c\/b\u003e\u0026lt;5%\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eTransfer Time:\u003c\/b\u003e20ms (Default) | 10ms (Configurable) | 20ms (Parallel)\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003eNo. of MPPTs:3\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eInputs per MPPT:\u003c\/b\u003e2 (MPPT 1) | 2 (MPPT 2) | 1 (MPPT 3)\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eMax. Usable Input Current:\u003c\/b\u003e26A (MPPT 1) | 26A (MPPT 2) | 15A (MPPT 3)\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eMax. Short Circuit Input Current:\u003c\/b\u003e31A (MPPT 1) | 31A (MPPT 2) | 19A (MPPT 3)\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eDC Input Voltage Range:\u003c\/b\u003e100 – 600VDC\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eUnit Start-Up Voltage:\u003c\/b\u003e100VDC\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eMPPT Operating Voltage Range:\u003c\/b\u003e120 – 440VDC\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eNominal MPPT Voltage:\u003c\/b\u003e360VDC\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eMax. Utilized PV Array Power:\u003c\/b\u003e21000W\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eMax. Recommended PV Input:\u003c\/b\u003e25000W\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eMax. Efficiency:\u003c\/b\u003e97% (PV to Grid) | 94.5% (PV to Battery) | 94% (Battery to Grid)\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eIdle Consumption:\u003c\/b\u003e\u0026lt;65W\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eNominal Voltage:\u003c\/b\u003e48VDC\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eVoltage Range:\u003c\/b\u003e40 – 60VDC\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eMax. Charge \/ Discharge Power:\u003c\/b\u003e12000W\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eRecommended Battery Capacity per Inverter:\u003c\/b\u003e\u0026gt;300Ah\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eOperating \/ Storage Temperature Range:\u003c\/b\u003e-13ºF – 140ºF (-25ºC – 60ºC)\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eOperating Altitude\u003c\/b\u003e:\u0026lt;6,561 ft (2000 m)\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eRelative Humidity:\u003c\/b\u003e0 – 100%\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eTypical Noise Emission\u003c\/b\u003e:\u0026lt;50dB @ 3 ft\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eDesign Topology\u003c\/b\u003e:High-Frequency \/ Transformerless\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eProtection Rating\u003c\/b\u003e:IP65 \/ NEMA 4X\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eCommunications:\u003c\/b\u003eRS485 \/ CANBus \/ WiFi\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eMax. Parallel Connections:\u003c\/b\u003e16\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eWeight:\u003c\/b\u003e88 lbs (40 kg)\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eDepth:\u003c\/b\u003e11.3 in (287 mm)\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eWidth:\u003c\/b\u003e22.3 in (567 mm)\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003e\u003cspan style=\"font-size: 12.0pt; font-family: 'Times New Roman',serif; mso-fareast-font-family: 'Times New Roman'; mso-font-kerning: 0pt; mso-ligatures: none; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;\"\u003eHeight\u003c\/span\u003e\u003c\/b\u003e\u003cspan style=\"font-size: 12.0pt; font-family: 'Times New Roman',serif; mso-fareast-font-family: 'Times New Roman'; mso-font-kerning: 0pt; mso-ligatures: none; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;\"\u003e:30.5 in (775 mm)\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv class=\"table-header\"\u003e\n\u003ch2\u003eBattery Downloads\u003c\/h2\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"table-body\"\u003e\n\u003cdiv class=\"table-row\"\u003e\n\u003cspan class=\"row-key\"\u003eSKU#:\u003c\/span\u003e\u003cspan class=\"row-value\"\u003eK0100\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"table-row\"\u003e\n\u003cspan class=\"row-key\"\u003eSpec Sheet:\u003c\/span\u003e\u003ca rel=\"noopener\" href=\"https:\/\/bigbattery.com\/wp-content\/uploads\/2024\/08\/EG4-14.3kWh-PowerPro-WallMount-AW-Spec-Sheet.pdf\" class=\"download-btn\" target=\"_blank\"\u003e\u003cimg alt=\"Download\" src=\"https:\/\/bigbattery.com\/wp-content\/themes\/shoptimizer-child\/template-parts\/product\/assets\/images\/download.png\" decoding=\"async\"\u003eDOWNLOAD\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"table-row\"\u003e\n\u003cspan class=\"row-key\"\u003eUser Manual:\u003c\/span\u003e\u003ca rel=\"noopener\" href=\"https:\/\/bigbattery.com\/wp-content\/uploads\/2024\/08\/EG4-14.3kWh-PowerPro-WallMount-AW-Manual.pdf\" class=\"download-btn\" target=\"_blank\"\u003e\u003cimg alt=\"Download\" src=\"https:\/\/bigbattery.com\/wp-content\/themes\/shoptimizer-child\/template-parts\/product\/assets\/images\/download.png\" decoding=\"async\"\u003eDOWNLOAD\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"table-row\"\u003e\n\u003cspan class=\"row-key\"\u003eUL9540A Certificate:\u003c\/span\u003e\u003ca rel=\"noopener\" href=\"https:\/\/bigbattery.com\/wp-content\/uploads\/2024\/08\/EG4-LL-WallMount-280Ah-UL9540A-Test-Verification.pdf\" class=\"download-btn\" target=\"_blank\"\u003e\u003cimg alt=\"Download\" src=\"https:\/\/bigbattery.com\/wp-content\/themes\/shoptimizer-child\/template-parts\/product\/assets\/images\/download.png\" decoding=\"async\"\u003eDOWNLOAD\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"table-row\"\u003e\n\u003cspan class=\"row-key\"\u003eUL1973 Certificate:\u003c\/span\u003e\u003ca rel=\"noopener\" href=\"https:\/\/bigbattery.com\/wp-content\/uploads\/2024\/08\/EG4%C2%AE-14.3kWh-PowerPro-WallMount-UL1973-Certificate-Of-Compliance.pdf\" class=\"download-btn\" target=\"_blank\"\u003e\u003cimg alt=\"Download\" src=\"https:\/\/bigbattery.com\/wp-content\/themes\/shoptimizer-child\/template-parts\/product\/assets\/images\/download.png\" decoding=\"async\"\u003eDOWNLOAD\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"table-row\"\u003e\n\u003cspan class=\"row-key\"\u003eQuick Start Guide:\u003c\/span\u003e\u003ca rel=\"noopener\" href=\"https:\/\/bigbattery.com\/wp-content\/uploads\/2024\/08\/EG4%C2%AE-14.3kWh-WallMount-AW-Quick-Start-Guide.pdf\" class=\"download-btn\" target=\"_blank\"\u003e\u003cimg alt=\"Download\" src=\"https:\/\/bigbattery.com\/wp-content\/themes\/shoptimizer-child\/template-parts\/product\/assets\/images\/download.png\" decoding=\"async\"\u003eDOWNLOAD\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"table-row\"\u003e\n\u003cspan class=\"row-key\"\u003eCEC Listing- EG4 WallMount All Weather:\u003c\/span\u003e\u003ca rel=\"noopener\" href=\"https:\/\/solarequipment.energy.ca.gov\/Home\/EnergyStorage?ManufacturerID=EG4+Electronics+LLC\u0026amp;amp;ModelNameID=-1\u0026amp;amp;Submit=Search\u0026amp;amp;Rows=25\" class=\"download-btn\" target=\"_blank\"\u003e\u003cimg alt=\"Go to link\" src=\"https:\/\/bigbattery.com\/wp-content\/themes\/shoptimizer-child\/template-parts\/product\/assets\/images\/gotolink.png\" decoding=\"async\"\u003eGO TO LINK\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"table-row\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"table-row\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cdiv class=\"table-header\"\u003e\n\u003ch2\u003eInverter Downloads\u003c\/h2\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"table-body\"\u003e\n\u003cdiv class=\"table-row\"\u003e\n\u003cspan class=\"row-key\"\u003eSKU#:\u003c\/span\u003e\u003cspan class=\"row-value\"\u003eK0100\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"table-row\"\u003e\n\u003cspan class=\"row-key\"\u003eSpec Sheet:\u003c\/span\u003e\u003ca rel=\"noopener\" href=\"https:\/\/bigbattery.com\/wp-content\/uploads\/2025\/01\/EG4-FlexBoss21-Spec-Sheet.pdf\" class=\"download-btn\" target=\"_blank\"\u003e\u003cimg alt=\"Download\" src=\"https:\/\/bigbattery.com\/wp-content\/themes\/shoptimizer-child\/template-parts\/product\/assets\/images\/download.png\" decoding=\"async\"\u003eDOWNLOAD\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"table-row\"\u003e\n\u003cspan class=\"row-key\"\u003eUser Manual:\u003c\/span\u003e\u003ca rel=\"noopener\" href=\"https:\/\/bigbattery.com\/wp-content\/uploads\/2025\/01\/FlexBOSS-21-Manual.pdf\" class=\"download-btn\" target=\"_blank\"\u003e\u003cimg alt=\"Download\" src=\"https:\/\/bigbattery.com\/wp-content\/themes\/shoptimizer-child\/template-parts\/product\/assets\/images\/download.png\" decoding=\"async\"\u003eDOWNLOAD\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"table-row\"\u003e\n\u003cspan class=\"row-key\"\u003eUL1741 Certificate:\u003c\/span\u003e\u003ca rel=\"noopener\" href=\"https:\/\/bigbattery.com\/wp-content\/uploads\/2024\/11\/EG4-FlexBoss21-COC.pdf\" class=\"download-btn\" target=\"_blank\"\u003e\u003cimg alt=\"Download\" src=\"https:\/\/bigbattery.com\/wp-content\/themes\/shoptimizer-child\/template-parts\/product\/assets\/images\/download.png\" decoding=\"async\"\u003eDOWNLOAD\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"table-row\"\u003e\n\u003cspan class=\"row-key\"\u003eCEC Listing- EG4 FlexBoss21:\u003c\/span\u003e\u003ca rel=\"noopener\" href=\"https:\/\/solarequipment.energy.ca.gov\/Home\/EnergyStorage?ManufacturerID=EG4+Electronics+LLC\u0026amp;amp;ModelNameID=-1\u0026amp;amp;Submit=Search\u0026amp;amp;Rows=25\" class=\"download-btn\" target=\"_blank\"\u003e\u003cimg alt=\"Go to link\" src=\"https:\/\/bigbattery.com\/wp-content\/themes\/shoptimizer-child\/template-parts\/product\/assets\/images\/gotolink.png\" decoding=\"async\"\u003eGO TO LINK\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"table-row\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ch3 class=\"table-row\"\u003eWaranty\u003c\/h3\u003e\n\u003cdiv class=\"table-row\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cdiv class=\"shoptimizer-archive\"\u003e\n\u003cdiv class=\"col-full\"\u003e\n\u003cdiv class=\"content-area\" id=\"primary\"\u003e\u003cmain role=\"main\" class=\"site-main\" id=\"main\"\u003e\n\u003cdiv class=\"product type-product post-157002 status-publish first instock product_cat-ul-grid-tied has-post-thumbnail sale taxable shipping-taxable purchasable product-type-variable has-default-attributes\" id=\"product-157002\"\u003e\n\u003cdiv class=\"product__desc\"\u003e\n\u003cdiv class=\"product__desc-wrapper\"\u003e\n\u003cdiv class=\"bb_container\"\u003e\n\u003cdiv class=\"bb_row\"\u003e\n\u003cdiv class=\"bb_w-6 bb_product_tabs\"\u003e\n\u003cdiv class=\"bb_tabs_content\"\u003e\n\u003cdiv id=\"warranty-info-tab\" class=\"bb_tab_content pad-1 active\"\u003e\n\u003cp\u003eEG4 FlexBoss21 Inverter:\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e10-Year\u003c\/strong\u003e EG4 Manufacturer Warranty\u003c\/p\u003e\n\u003cp\u003eEG4 All Weather Battery:\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e10-Year\u003c\/strong\u003e EG4 Manufacturer Warranty\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/main\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003csection id=\"footer-new-section\"\u003e\u003cfooter class=\"footer\" id=\"footer\"\u003e\n\u003cdiv data-negative=\"false\" class=\"custom-shape custom-shape-top\"\u003e\u003csvg preserveaspectratio=\"none\" viewbox=\"0 0 1000 100\" 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class=\"footer__body\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/footer\u003e\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"BigBattery","offers":[{"title":"1x FlexBOSS21 + 1x All Weather","offer_id":48627666485494,"sku":"K0100","price":7265.0,"currency_code":"USD","in_stock":true},{"title":"1x FlexBOSS21 + 2x All Weather","offer_id":50446349598966,"sku":"K0101","price":11130.0,"currency_code":"USD","in_stock":true},{"title":"1x FlexBOSS21 + 3x All Weather","offer_id":50446349631734,"sku":"K0114","price":14995.0,"currency_code":"USD","in_stock":true},{"title":"2x FlexBOSS21 + 4x All Weather","offer_id":50446349664502,"sku":"K0115","price":23445.0,"currency_code":"USD","in_stock":true},{"title":"3x FlexBOSS21 + 6x All Weather","offer_id":50446349697270,"sku":"K0128","price":33795.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0549\/3738\/7254\/files\/Main-1-3.webp?v=1776311131","url":"https:\/\/ecopowerit.com\/products\/eg4-280ah-all-weather-flexboss21-ess","provider":"EcoPowerit","version":"1.0","type":"link"}