{"id":9361410228463,"title":"EG4 FlexBOSS21 All-In-One Hybrid Inverter 21kW PV Input 16kW AC Output - EG4INV240V50AFLXBOSSV2","handle":"eg4-flexboss21-all-in-one-hybrid-inverter-21kw-pv-input-16kw-ac-output-eg4inv240v50aflxbossv2","description":"\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan\u003eThe EG4 FlexBOSS21 is a 16kW, 120\/240 VAC split-phase, all-in-one, hybrid, sine wave inverter designed for the residential and small commercial markets. The FlexBOSS21 can utilize 21kW of DC (STC) solar PV on three MPPTs (26A\/26A\/15A) and can generate 12kW of power during non-peak sunlight conditions and 16kW with solar PV gain when connected to the grid. It can bypass 90A of utility power from its grid port to its load port.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan\u003e The FlexBOSS21 is an enhanced power-level cousin to EG4's flagship 18kPV inverter. Though it can perform as a standalone inverter, it has been designed to work optimally with EG4's GridBOSS power gateway, unlocking an even more robust feature-set and level of performance for the end user. Certified to UL 3141 and UL 1741, this inverter is EMP-hardened for reliable operation during Electromagnetic Pulse (EMP) events.\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cspan\u003eKey Features \u0026amp; Benefits\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eIndustry-Leading Capacity:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Highest PV input on the market (21kW usable, 24kW max) delivering 16kW AC output with PV and 12kW without.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eThree Independent MPPTs (26A\/26A\/15A):\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Supports up to five strings with panels up to 13A, allowing flexible configurations across three orientations for optimal energy harvest.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eEMP-Hardened:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Ensures reliable operation during Electromagnetic Pulse (EMP) events, protecting critical electronics to ensure continued operation during natural or manmade disruptions.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eFlexible Scalability:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Expands easily from small to large systems, 50-160 Amps (equivalent to full 200A service). Supports up to 16 units in parallel for a total output of 256kW.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003ePowerful Performance:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Starts a 5-ton AC unit easily. Provides 16kW continuous output with PV \u0026amp; battery, and 12kW continuous output using battery alone.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eComprehensive Certification Package:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e UL 3141 and UL 1741 certified with full compliance safety features including PV Arc Fault Protection, PV Ground Fault Protection, PV Reverse Polarity Protection, Surge Protection, Integrated PV Disconnect, built-in RSD transmitter, and RSD\/ESS disconnect initiator.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eComplete System Compatibility:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Easily integrates with EG4's battery lineup and pairs perfectly with GridBOSS systems, supporting AC coupling, smart load management, and generator integration.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eRemote Monitoring:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Built-in Wi-Fi integrates with the EG4 app, enabling real-time monitoring of performance, battery status, and system settings, as well as remote firmware updates.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eNEMA 4X Rated:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Weather-resistant enclosure provides protection against corrosion, rain, and dust, making it suitable for outdoor installations.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003e10-Year Warranty:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Backed by a 10-year warranty for long-term peace of mind.\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cspan\u003eProduct Documents\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli class=\"ds-markdown-paragraph\"\u003e\n\u003cstrong\u003e\u003cspan\u003eUser Manual:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/eg4electronics.com\/wp-content\/uploads\/2024\/08\/FlexBOSS-21-Manual.pdf\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003cspan\u003eDownload User Manual\u003c\/span\u003e\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli class=\"ds-markdown-paragraph\"\u003e\n\u003cstrong\u003e\u003cspan\u003eSpec Sheet:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/eg4electronics.com\/wp-content\/uploads\/2024\/10\/EG4-FlexBoss21-Spec-Sheet.pdf\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003cspan\u003eDownload Spec Sheet\u003c\/span\u003e\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli class=\"ds-markdown-paragraph\"\u003e\n\u003cstrong\u003e\u003cspan\u003eSystem Wiring Diagrams:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/eg4electronics.com\/wp-content\/uploads\/2025\/03\/EG4-FlexBOSS21-System-Wiring-Diagrams.pdf\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003cspan\u003eDownload Wiring Diagrams\u003c\/span\u003e\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli class=\"ds-markdown-paragraph\"\u003e\n\u003cstrong\u003e\u003cspan\u003eBattery Wiring Diagrams:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/eg4electronics.com\/wp-content\/uploads\/2025\/08\/EG4-Systems-Battery-Wiring-Diagrams-2.0.pdf\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003cspan\u003eDownload Battery Wiring Diagrams\u003c\/span\u003e\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","published_at":"2026-04-22T14:04:58-06:00","created_at":"2026-04-22T14:04:58-06:00","vendor":"SolarPanelStore","type":"Inverter Large","tags":[],"price":480000,"price_min":480000,"price_max":480000,"available":true,"price_varies":false,"compare_at_price":null,"compare_at_price_min":0,"compare_at_price_max":0,"compare_at_price_varies":false,"variants":[{"id":49088246251759,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"EG4INV240V50AFLXBOSSV1.1","requires_shipping":true,"taxable":false,"featured_image":null,"available":true,"name":"EG4 FlexBOSS21 All-In-One Hybrid Inverter 21kW PV Input 16kW AC Output - EG4INV240V50AFLXBOSSV2","public_title":null,"options":["Default Title"],"price":480000,"weight":45359,"compare_at_price":null,"inventory_management":null,"barcode":"320-0046","requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}}],"images":["\/\/www.solarpanelstore.com\/cdn\/shop\/files\/EG4-FlexBOSS21.webp?v=1776888349"],"featured_image":"\/\/www.solarpanelstore.com\/cdn\/shop\/files\/EG4-FlexBOSS21.webp?v=1776888349","options":["Title"],"media":[{"alt":"EG4 FlexBOSS21 All-In-One Hybrid Inverter 21kW PV Input 16kW AC Output - EG4INV240V50AFLXBOSSV2","id":38674055332079,"position":1,"preview_image":{"aspect_ratio":1.0,"height":1250,"width":1250,"src":"\/\/www.solarpanelstore.com\/cdn\/shop\/files\/EG4-FlexBOSS21.webp?v=1776888349"},"aspect_ratio":1.0,"height":1250,"media_type":"image","src":"\/\/www.solarpanelstore.com\/cdn\/shop\/files\/EG4-FlexBOSS21.webp?v=1776888349","width":1250}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan\u003eThe EG4 FlexBOSS21 is a 16kW, 120\/240 VAC split-phase, all-in-one, hybrid, sine wave inverter designed for the residential and small commercial markets. The FlexBOSS21 can utilize 21kW of DC (STC) solar PV on three MPPTs (26A\/26A\/15A) and can generate 12kW of power during non-peak sunlight conditions and 16kW with solar PV gain when connected to the grid. It can bypass 90A of utility power from its grid port to its load port.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan\u003e The FlexBOSS21 is an enhanced power-level cousin to EG4's flagship 18kPV inverter. Though it can perform as a standalone inverter, it has been designed to work optimally with EG4's GridBOSS power gateway, unlocking an even more robust feature-set and level of performance for the end user. Certified to UL 3141 and UL 1741, this inverter is EMP-hardened for reliable operation during Electromagnetic Pulse (EMP) events.\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cspan\u003eKey Features \u0026amp; Benefits\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eIndustry-Leading Capacity:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Highest PV input on the market (21kW usable, 24kW max) delivering 16kW AC output with PV and 12kW without.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eThree Independent MPPTs (26A\/26A\/15A):\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Supports up to five strings with panels up to 13A, allowing flexible configurations across three orientations for optimal energy harvest.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eEMP-Hardened:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Ensures reliable operation during Electromagnetic Pulse (EMP) events, protecting critical electronics to ensure continued operation during natural or manmade disruptions.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eFlexible Scalability:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Expands easily from small to large systems, 50-160 Amps (equivalent to full 200A service). Supports up to 16 units in parallel for a total output of 256kW.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003ePowerful Performance:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Starts a 5-ton AC unit easily. Provides 16kW continuous output with PV \u0026amp; battery, and 12kW continuous output using battery alone.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eComprehensive Certification Package:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e UL 3141 and UL 1741 certified with full compliance safety features including PV Arc Fault Protection, PV Ground Fault Protection, PV Reverse Polarity Protection, Surge Protection, Integrated PV Disconnect, built-in RSD transmitter, and RSD\/ESS disconnect initiator.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eComplete System Compatibility:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Easily integrates with EG4's battery lineup and pairs perfectly with GridBOSS systems, supporting AC coupling, smart load management, and generator integration.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eRemote Monitoring:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Built-in Wi-Fi integrates with the EG4 app, enabling real-time monitoring of performance, battery status, and system settings, as well as remote firmware updates.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eNEMA 4X Rated:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Weather-resistant enclosure provides protection against corrosion, rain, and dust, making it suitable for outdoor installations.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003e10-Year Warranty:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Backed by a 10-year warranty for long-term peace of mind.\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cspan\u003eProduct Documents\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli class=\"ds-markdown-paragraph\"\u003e\n\u003cstrong\u003e\u003cspan\u003eUser Manual:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/eg4electronics.com\/wp-content\/uploads\/2024\/08\/FlexBOSS-21-Manual.pdf\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003cspan\u003eDownload User Manual\u003c\/span\u003e\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli class=\"ds-markdown-paragraph\"\u003e\n\u003cstrong\u003e\u003cspan\u003eSpec Sheet:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/eg4electronics.com\/wp-content\/uploads\/2024\/10\/EG4-FlexBoss21-Spec-Sheet.pdf\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003cspan\u003eDownload Spec Sheet\u003c\/span\u003e\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli class=\"ds-markdown-paragraph\"\u003e\n\u003cstrong\u003e\u003cspan\u003eSystem Wiring Diagrams:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/eg4electronics.com\/wp-content\/uploads\/2025\/03\/EG4-FlexBOSS21-System-Wiring-Diagrams.pdf\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003cspan\u003eDownload Wiring Diagrams\u003c\/span\u003e\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli class=\"ds-markdown-paragraph\"\u003e\n\u003cstrong\u003e\u003cspan\u003eBattery Wiring Diagrams:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/eg4electronics.com\/wp-content\/uploads\/2025\/08\/EG4-Systems-Battery-Wiring-Diagrams-2.0.pdf\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003cspan\u003eDownload Battery Wiring Diagrams\u003c\/span\u003e\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e"}