{"product_id":"fortress-power-envy-duo-21-hybrid-solar-inverter","title":"Fortress Power Envy Duo 21 48V Hybrid Solar Inverter","description":"\u003cp\u003eThe \u003cstrong\u003eFortress Power Envy Duo 21\u003c\/strong\u003e is Fortress Power's most powerful 48V hybrid inverter, built to handle both residential and light commercial energy needs. With up to \u003cstrong\u003e25kW of solar input\u003c\/strong\u003e and dual-phase support (240V split-phase and 208V three-phase), it delivers a reliable \u003cstrong\u003e12kW of continuous backup power\u003c\/strong\u003e with up to \u003cstrong\u003e16kW export capacity\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003ePerfectly paired with Fortress Power's 48V batteries, the Envy Duo 21 offers flexible applications from whole-home backup to off-grid living. With built-in AC\/DC breakers, rapid shutdown transmitter, and scalability up to \u003cstrong\u003e120kW by connecting up to 10 units in parallel\u003c\/strong\u003e, it's a future-ready solution designed for maximum performance and long-term reliability.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh PV Input, Maximum Generation\u003c\/strong\u003e - Handles up to 25kW of solar input, so you can generate more solar production and store more energy from your system - perfect for larger homes or small businesses.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible Voltage for Any Setup\u003c\/strong\u003e - Works with both 240V split-phase and 208V three-phase setups, giving you compatibility across different grid types without extra equipment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStreamlined Battery Integration\u003c\/strong\u003e - Optimized for Fortress Power 48V batteries, delivering 12kW continuous output and up to 16kW peak, ensuring whole-home or business backup without compromise.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExpandable as You Grow\u003c\/strong\u003e - Expand your system by connecting up to 10 inverters in parallel, allowing your energy capacity to grow as your needs increase - without a full redesign.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003ePairs well with:\u003c\/strong\u003e Fortress Power eForce, eVault MAX, and eFlex MAX batteries\u003c\/p\u003e\n\n\u003cp\u003eHave any questions? Email us at \u003ca href=\"mailto:info@solwel.com\"\u003einfo@solwel.com\u003c\/a\u003e or give us a call at \u003ca href=\"tel:3464324228\"\u003e(346) 432-4228\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003chr\u003e\n\u003ch2\u003eWhy Buy From Solwel?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFree Shipping on Orders Over $10,000\u003c\/strong\u003e - Fast fulfillment from our Houston and Dallas warehouses\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAuthorized Distributor\u003c\/strong\u003e - Genuine manufacturer-backed products with full warranty support\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExpert Technical Support\u003c\/strong\u003e - Our team knows these products inside and out. Call us at (346) 432-4228\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstaller Pricing Available\u003c\/strong\u003e - Contact us for volume pricing and contractor accounts\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStocked in Texas\u003c\/strong\u003e - Reduced lead times for Southwest and national projects\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eWhat is the maximum solar input for the Envy Duo 21?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eThe Envy Duo 21 supports up to \u003cstrong\u003e25kW of solar PV input\u003c\/strong\u003e, making it well-suited for larger residential arrays and light commercial installations where maximum generation is a priority.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eWhat voltage configurations does it support?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eThe Envy Duo 21 supports both \u003cstrong\u003e240V split-phase\u003c\/strong\u003e (standard U.S. residential) and \u003cstrong\u003e208V three-phase\u003c\/strong\u003e configurations, giving it broad compatibility across residential and light commercial grid types without additional equipment.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eCan I scale up beyond one unit?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eYes - you can connect up to \u003cstrong\u003e10 Envy Duo 21 units in parallel\u003c\/strong\u003e for a total system capacity of up to 120kW, making it a strong fit for growing energy needs or light commercial properties.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eWhat batteries are compatible with the Envy Duo 21?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eThe Envy Duo 21 is optimized for \u003cstrong\u003eFortress Power 48V batteries\u003c\/strong\u003e, including the eForce, eVault MAX, and eFlex MAX. Contact us at (346) 432-4228 for questions about third-party battery compatibility.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eDoes Solwel offer installation support?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eSolwel is a solar equipment distributor, not an installation company. However, we can connect you with certified local installers in the Houston and Dallas area. Call us at (346) 432-4228 or email info@solwel.com.\u003c\/p\u003e\u003c\/details\u003e","brand":"Fortress Power","offers":[{"title":"Default Title","offer_id":53123860726049,"sku":null,"price":4898.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0963\/1442\/5633\/files\/EnvyDuo21_front.jpg?v=1785437552","url":"https:\/\/solwel.com\/products\/fortress-power-envy-duo-21-hybrid-solar-inverter","provider":"Solwel","version":"1.0","type":"link"}