{"product_id":"fortress-power-envy-duo-21-whole-home-solar-hybrid-inverter","title":"Fortress Envy Duo 21-US (16 kWh) Hybrid Inverter","description":"\u003cp\u003e\u003cimg alt=\"Fortress\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0612\/1924\/2053\/files\/Fortress_Logo.png?v=1789079733\"\u003e\u003c\/p\u003e\n\u003cul class=\"accordion\"\u003e\n\u003cli class=\"accordion-item is-active\"\u003e\n\u003ch3 class=\"accordion-thumb\"\u003eDescription\u003c\/h3\u003e\n\u003cdiv class=\"accordion-panel\"\u003e\n\u003ch2\u003eFortress Envy Duo 21 Whole Home Hybrid Inverter \u003c\/h2\u003e\n\u003cp\u003eThe Fortress Envy Duo 21 is a 48 V \u003ca href=\"https:\/\/solux.energy\/collections\/inverter-solar\" title=\"Inverter Collection Page\"\u003e\u003cstrong\u003ehybrid inverter\u003c\/strong\u003e\u003c\/a\u003e designed for residential and light commercial solar-plus-storage systems. It supports up to 25,000 W of total PV array power across 3 independent MPPT trackers and delivers 12,000 W of continuous output power in grid-tied or off-grid modes. Featuring an integrated 200 A transfer switch, pre-installed AC\/DC circuit breakers, and an \u003ca href=\"https:\/\/solux.energy\/collections\/apsmart\" title=\"APsmart Collection\"\u003e\u003cstrong\u003eAPsmart\u003c\/strong\u003e\u003c\/a\u003e rapid shutdown transmitter, it provides full backup power management in a single NEMA 4X \/ IP66 outdoor-rated enclosure.\u003c\/p\u003e\n\u003cp\u003eCompatible with 120\/240 V split-phase and 120\/208 V three-phase electrical systems, the inverter handles high surge loads with peak outputs up to 16,000 W on 240 V connections. The transformer-less design connects to 48 V \u003ca href=\"https:\/\/solux.energy\/collections\/batteries\" title=\"Battery Collection\"\u003e\u003cstrong\u003elithium battery\u003c\/strong\u003e\u003c\/a\u003e systems and allows parallel scaling for up to 10 units to achieve 120 kW total system capacity. Weighing 125.7 lb, the unit features smart fan cooling and an active temperature range built for demanding installations.\u003c\/p\u003e\n\u003ch3\u003eFeatures and Specifications of Fortress Envy Duo\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eNumber of MPPT: 3\u003c\/li\u003e\n\u003cli\u003eInputs per MPPT: 2:2:1\u003c\/li\u003e\n\u003cli\u003eMax. usable input current (A): 26\/26\/15\u003c\/li\u003e\n\u003cli\u003eMax. short circuit input current (A): 31\/31\/19\u003c\/li\u003e\n\u003cli\u003eStart input voltage (V): 100\u003c\/li\u003e\n\u003cli\u003eMPPT DC nominal voltage (V): 360\u003c\/li\u003e\n\u003cli\u003eDC voltage range (V): 100-550\u003c\/li\u003e\n\u003cli\u003eMPPt operating voltage range (V): 120-440\u003c\/li\u003e\n\u003cli\u003eMax. Power (W): 21,000\u003c\/li\u003e\n\u003cli\u003eMax. PV ARRAY POWER (W): 25,000\u003c\/li\u003e\n\u003cli\u003eParalleling Capability: Up to 10 units (120kW)\u003c\/li\u003e\n\u003cli\u003eDimensions (W x H x D): 2.3 x 35.2 x 11.2 in (566 x 893 x 285 mm)\u003c\/li\u003e\n\u003cli\u003eWeight: 125.71 lbs (57 kg)\u003c\/li\u003e\n\u003cli\u003eDegree of protection: NEMA4X \/ IP66\u003c\/li\u003e\n\u003cli\u003eCooling concept: Smart Cooling Fans\u003c\/li\u003e\n\u003cli\u003eTopology: High Frequency Transformer-less\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eBackup Output Data\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eNominal output current (A): 50 @ 240V, 57.7 @ 208V\u003c\/li\u003e\n\u003cli\u003eNominal output voltage (V): (120\/240), (120\/208)\u003c\/li\u003e\n\u003cli\u003eContinuous output power (VA): 12000 @ 240V, 12000 @ 208V\u003c\/li\u003e\n\u003cli\u003eOperating frequency (Hz): 60\u003c\/li\u003e\n\u003cli\u003eTHDV: \u0026lt;3%\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"accordion-item\"\u003e\n\u003ch3 class=\"accordion-thumb\"\u003eResources\u003c\/h3\u003e\n\u003cdiv class=\"accordion-panel\"\u003e\n\u003cp style=\"font-size: 0.8em;\"\u003eDatasheet\u003c\/p\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0612\/1924\/2053\/files\/Fortress-Power-EnvyDuo21-0625-datasheet.pdf?v=1789972819\" target=\"_blank\" title=\"Fronius Envy Duo Inverter Datasheet\" rel=\"noopener\"\u003e✔️ Download Datasheet\u003c\/a\u003e\u003chr\u003e\n\u003cp style=\"font-size: 0.8em;\"\u003eQuick Installation Guide\u003c\/p\u003e\n\u003cp\u003eNo quick installation guide file resource available. \u003ca href=\"https:\/\/solux.energy\/pages\/contact\" title=\"Contact Us\"\u003e\u003cstrong\u003eEmail support@solux.energy\u003c\/strong\u003e\u003c\/a\u003e for file request.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp style=\"font-size: 0.8em;\"\u003eWarranty\u003c\/p\u003e\n\u003cp\u003eNo warranty file resource available. \u003cstrong\u003e\u003ca href=\"https:\/\/solux.energy\/pages\/contact\" title=\"Contact Us\"\u003eEmail support@solux.energy\u003c\/a\u003e\u003c\/strong\u003e for file request.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"clear: both;\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"cta-pdf\"\u003e\n\u003cdiv class=\"one-half-col-left\"\u003e\n\u003ch3\u003eDownload Spec Sheet of Fortress Envy Duo 21-US\u003cbr\u003e\n\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"one-half-col-right\"\u003e\n\u003cdiv class=\"pdf-sec-col\"\u003e\u003ca class=\"btn-download\" download=\"\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0612\/1924\/2053\/files\/Fortress-Power-EnvyDuo21-0625-datasheet.pdf?v=1789972819\" rel=\"noopener\" target=\"_blank\" title=\"Fronius Ency Duo Inverter Datasheet\"\u003eYes, please\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Solux, LLC","offers":[{"title":"Default Title","offer_id":45814519005253,"sku":"Envy Duo 21-US (16 kWh)","price":6114.65,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/1924\/2053\/files\/Fortress_Envy_Duo_21-US_16_kWh_Hybrid_Inverter.webp?v=1790347951","url":"https:\/\/solux.energy\/products\/fortress-power-envy-duo-21-whole-home-solar-hybrid-inverter","provider":"Solux, LLC","version":"1.0","type":"link"}