{"product_id":"eg4-flexboss18-hybrid-inverter-18kw-pv-12kw-ac-48v-split-phase-ul1741-inv031","title":"EG4 | FlexBOSS18 Hybrid Inverter | 18kW PV \/ 12kW AC | 48V Split-Phase | UL1741 | INV031","description":"\u003ch2\u003eEG4 FlexBOSS18 Hybrid Inverter\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eEG4 FlexBOSS18\u003c\/strong\u003e is a 48V all-in-one hybrid inverter that accepts up to \u003cstrong\u003e18,000W of solar\u003c\/strong\u003e and delivers \u003cstrong\u003e12,000W of continuous split-phase AC output\u003c\/strong\u003e (120\/240V or 120\/208V). With dual MPPTs, a 90A grid pass-through, built-in rapid shutdown and arc-fault protection, and an IP65 \/ NEMA 4X outdoor-rated enclosure, it is built to power whole-home solar and battery backup systems, with or without the grid.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e18kW PV Input:\u003c\/strong\u003e Two MPPTs with two strings each, 100–600VDC input range\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e12kW Continuous Output:\u003c\/strong\u003e Split-phase 120\/240VAC or 120\/208VAC, with peak power up to 20kW\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e90A Grid Pass-Through:\u003c\/strong\u003e Supports whole-home backup and grid-tied operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e10kW Battery Charge\/Discharge:\u003c\/strong\u003e Works with EG4 and BigBattery ETHOS batteries in closed-loop communication\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eScalable:\u003c\/strong\u003e Parallel up to 10 units for larger systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-In Safety:\u003c\/strong\u003e Rapid shutdown, ground-fault, and arc-fault protection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor Rated:\u003c\/strong\u003e IP65 \/ NEMA 4X enclosure, -13°F to 140°F operating range\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmart Monitoring:\u003c\/strong\u003e Wi-Fi monitoring with mobile alerts, plus RS485, CANbus, and 4G options\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGridBOSS Ready:\u003c\/strong\u003e Pairs with the EG4 GridBOSS MID for load management and generator integration\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated AC Output:\u003c\/strong\u003e 12,000W @ 240VAC \/ 12,000W @ 208VAC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePeak Power:\u003c\/strong\u003e 20,000W (0.5s), 15,000W (1s), 12,500W (6 min), 11,000W (12 min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated Output Current:\u003c\/strong\u003e 50A @ 240V (66.7A max)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAC Output Voltage:\u003c\/strong\u003e 120\/240VAC or 120\/208VAC split-phase\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrequency:\u003c\/strong\u003e 60Hz (50Hz selectable)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrid Pass-Through:\u003c\/strong\u003e 90A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax AC Input Power:\u003c\/strong\u003e 13,000W\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTransfer Time:\u003c\/strong\u003e 20ms default (10ms configurable)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Recommended PV Input:\u003c\/strong\u003e 18,000W\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMPPTs:\u003c\/strong\u003e 2 (2 inputs each)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePV Input Voltage Range:\u003c\/strong\u003e 100–600VDC (200VDC start-up)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMPPT Operating Range:\u003c\/strong\u003e 120–440VDC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Usable Input Current:\u003c\/strong\u003e 26A per MPPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Short-Circuit Current:\u003c\/strong\u003e 31A per MPPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery Voltage:\u003c\/strong\u003e 48VDC (40–60VDC range)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Battery Charge\/Discharge Power:\u003c\/strong\u003e 10,000W\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended Battery Capacity:\u003c\/strong\u003e 300Ah or more per inverter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency:\u003c\/strong\u003e 97.5% PV-to-grid, 94.5% PV-to-battery, 94% battery-to-grid\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIdle Consumption:\u003c\/strong\u003e Less than 65W\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eParallel Capability:\u003c\/strong\u003e Up to 10 units\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCommunication:\u003c\/strong\u003e RS485, CANbus, Wi-Fi, 4G\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnclosure Rating:\u003c\/strong\u003e IP65 \/ NEMA 4X\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating Temperature:\u003c\/strong\u003e -13°F to 140°F (-25°C to 60°C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTopology:\u003c\/strong\u003e High-frequency, transformerless\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions (W x D x H):\u003c\/strong\u003e 22.8 x 11.2 x 30.5 in\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 115 lbs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCertifications:\u003c\/strong\u003e UL 1741, CEC listed, UL 9540 system certified with closed-loop communication\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e10-Year EG4 Manufacturer Warranty\u003c\/h3\u003e\n\u003cp\u003eBacked by a \u003cstrong\u003e10-year EG4 manufacturer warranty\u003c\/strong\u003e and lifetime USA-based technical support.\u003c\/p\u003e\n\u003ch3\u003eManuals and Resources\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/bigbattery.com\/wp-content\/uploads\/2025\/05\/EG4-FlexBOSS18-Hybrid-Inverter-Spec-Sheet.pdf\" target=\"_blank\" rel=\"noopener\"\u003eSpec Sheet\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/bigbattery.com\/wp-content\/uploads\/2025\/05\/EG4-FlexBOSS18-Hybrid-Inverter-User-Manual.pdf\" target=\"_blank\" rel=\"noopener\"\u003eUser Manual\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"EG4","offers":[{"title":"Default Title","offer_id":53177593790751,"sku":"INV031","price":3199.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0887\/1965\/5199\/files\/FLEXBOSS18-3.webp?v=1793471771","url":"https:\/\/offgridselection.com\/products\/eg4-flexboss18-hybrid-inverter-18kw-pv-12kw-ac-48v-split-phase-ul1741-inv031","provider":"Off Grid Selection","version":"1.0","type":"link"}