{"product_id":"hoymiles-hiflow-pro-lv-420w-plug-in-wifi-microinverter-hms-420-1wm-lv","title":"Hoymiles HiFlow Pro LV 420W Plug-In WiFi Microinverter – HMS-420-1WM-LV","description":"\u003cstyle\u003e\n.uss-product{color:#222;font-size:16px;line-height:1.65}\n.uss-product h2{color:#020079;margin:30px 0 12px;line-height:1.3}\n.uss-product h3{color:#020079;margin:22px 0 10px}\n.uss-product ul{padding-left:24px}\n.uss-product li{margin-bottom:8px}\n.uss-highlight{background:#F5F7FF;border-left:4px solid #0021F3;padding:17px 20px;margin:18px 0}\n.uss-spec-wrap{overflow-x:auto}\n.uss-specs{width:100%;border-collapse:collapse}\n.uss-specs th{background:#020079;color:#fff;text-align:left;padding:12px}\n.uss-specs td{padding:11px 12px;border-bottom:1px solid #D9DDE5;vertical-align:top}\n.uss-specs td:first-child{font-weight:600;width:43%}\n.uss-specs .section td{background:#EEF1FA;color:#020079;font-weight:700}\n.uss-faq details{border:1px solid #D9DDE5;margin-bottom:10px}\n.uss-faq summary{padding:14px 16px;background:#F5F7FF;color:#020079;font-weight:700;cursor:pointer}\n.uss-faq details p{padding:0 16px 14px}\n@media(max-width:640px){.uss-product{font-size:15px}.uss-specs td,.uss-specs th{padding:9px}}\n\u003c\/style\u003e\n\u003carticle class=\"uss-product\"\u003e\n\u003ch2\u003eHoymiles HiFlow Pro LV Plug-In WiFi Microinverter\u003c\/h2\u003e\n\u003cdiv class=\"uss-highlight\"\u003e\u003cstrong\u003ePlug-In Solar Microinverter | Built-In WiFi \u0026amp; Bluetooth | S-Miles Home App | Single-Panel Solar Conversion\u003c\/strong\u003e\u003c\/div\u003e\n\u003cp\u003eThe \u003cstrong\u003eHoymiles HiFlow Pro LV Plug-In WiFi Microinverter\u003c\/strong\u003e makes small-scale solar generation more accessible with a compact, single-panel inverter designed for residential plug-in solar applications. Part of the Hoymiles HiFlow Pro LV series, it converts electricity generated by a compatible solar panel into AC power for use in a suitable grid-connected electrical system.\u003c\/p\u003e\n\u003cp\u003eDesigned for balcony solar, patio installations, garden solar systems, and other compact residential applications, the HiFlow Pro LV combines efficient power conversion with convenient app-based monitoring and straightforward system configuration.\u003c\/p\u003e\n\u003cp\u003eWith integrated WiFi and Bluetooth, the microinverter connects directly to the S-Miles Home app without requiring a separate Hoymiles data transfer unit (DTU). Its advanced maximum power point tracking technology helps optimize energy production as sunlight and operating conditions change.\u003c\/p\u003e\n\u003ch2\u003eKey Features and Benefits\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlug-In Solar Design:\u003c\/strong\u003e Developed for compact residential solar applications, including balconies, patios, terraces, and gardens.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle-Panel Microinverter:\u003c\/strong\u003e Connects to a compatible solar panel for individual module-level power conversion.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-In WiFi and Bluetooth:\u003c\/strong\u003e Enables local commissioning and wireless communication without an additional DTU.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eS-Miles Home App:\u003c\/strong\u003e Provides convenient solar system monitoring and supported configuration features.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdvanced MPPT Technology:\u003c\/strong\u003e Continuously adjusts operating conditions to improve solar energy harvesting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlug-and-Play Cable Interface:\u003c\/strong\u003e Supports a compatible Hoymiles AC plug-in cable assembly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated Rapid Shutdown:\u003c\/strong\u003e Includes a manufacturer-described rapid shutdown function and galvanically isolated transformer design.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor-Rated Construction:\u003c\/strong\u003e Designed for exposed residential solar applications using a sealed enclosure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFanless Cooling:\u003c\/strong\u003e Uses natural convection for quiet operation without mechanical cooling fans.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCybersecurity-Focused Design:\u003c\/strong\u003e Meets the ETSI EN 303 645 cybersecurity standard according to Hoymiles.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eDesigned for Residential Plug-In Solar\u003c\/h2\u003e\n\u003cp\u003eThe Hoymiles HiFlow Pro LV is designed to simplify small residential solar installations. Its compact design makes it suitable for applications where a traditional rooftop string inverter system may be unnecessarily complex.\u003c\/p\u003e\n\u003cp\u003eHomeowners can pair the microinverter with a compatible solar panel and the appropriate Hoymiles plug-in cable to create a small grid-connected solar generation system, subject to applicable electrical codes, utility requirements, and local plug-in solar regulations.\u003c\/p\u003e\n\u003cp\u003eThe microinverter synchronizes with the utility grid and is not designed to operate as a standalone off-grid inverter or provide backup power during an outage.\u003c\/p\u003e\n\u003ch2\u003eMonitor Solar Production with the S-Miles Home App\u003c\/h2\u003e\n\u003cp\u003eThe HiFlow Pro LV includes integrated wireless communication, allowing users to commission and monitor their microinverter through the Hoymiles S-Miles Home app.\u003c\/p\u003e\n\u003cp\u003eBluetooth supports local device communication, while built-in WiFi enables supported remote monitoring features when connected to an appropriate network.\u003c\/p\u003e\n\u003cp\u003eThis integrated connectivity eliminates the need for a separate DTU for the microinverter's supported app functions.\u003c\/p\u003e\n\u003ch2\u003eCompatible Solar Panels\u003c\/h2\u003e\n\u003cp\u003eThe HiFlow Pro LV is designed for use with a compatible single solar module. It supports modern residential photovoltaic panels, including suitable monocrystalline and bifacial modules, provided the panel's electrical characteristics remain within the microinverter's input limits.\u003c\/p\u003e\n\u003cp\u003eBefore selecting a solar panel, verify its open-circuit voltage, maximum power voltage, operating current, and short-circuit current against the inverter specifications. Cold-weather voltage conditions and potential bifacial current gains must also be considered.\u003c\/p\u003e\n\u003cp\u003eA solar panel with a higher DC nameplate rating does not increase the inverter's maximum rated AC output. The inverter limits its AC production according to its operating capabilities.\u003c\/p\u003e\n\u003ch2\u003ePlug-In Cable and Connection Requirements\u003c\/h2\u003e\n\u003cp\u003eThe HiFlow Pro LV uses the Hoymiles Flex-S3 field connector interface for its plug-and-play AC cable assembly. The North American datasheet specifies a Type B plug configuration.\u003c\/p\u003e\n\u003cp\u003eConfirm the appropriate cable assembly and package contents before ordering. The manufacturer datasheet identifies the supported cable configuration but does not establish that the complete AC plug-in cable is included with every individually sold microinverter.\u003c\/p\u003e\n\u003cp\u003eUse the manufacturer-approved cable and follow the applicable electrical installation requirements. Plug-in solar operation is subject to local regulations and utility interconnection rules.\u003c\/p\u003e\n\u003ch2\u003eCommon Applications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eResidential plug-in solar systems\u003c\/li\u003e\n\u003cli\u003eBalcony and terrace solar installations\u003c\/li\u003e\n\u003cli\u003ePatio and garden solar generation\u003c\/li\u003e\n\u003cli\u003eSmall grid-connected solar panel systems\u003c\/li\u003e\n\u003cli\u003eSingle-panel solar energy projects\u003c\/li\u003e\n\u003cli\u003eCompact residential solar installations\u003c\/li\u003e\n\u003cli\u003eModular solar generation with compatible equipment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eProduct Specifications\u003c\/h2\u003e\n\u003cdiv class=\"uss-spec-wrap\"\u003e\n\u003ctable class=\"uss-specs\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr class=\"section\"\u003e\n\u003ctd colspan=\"2\"\u003eProduct Information\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eHoymiles\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eHiFlow Pro LV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel \/ MPN\u003c\/td\u003e\n\u003ctd\u003eHMS-420-1WM-LV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eSingle-input plug-in solar microinverter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"section\"\u003e\n\u003ctd colspan=\"2\"\u003eSolar Input (DC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommonly Used PV Module Power\u003c\/td\u003e\n\u003ctd\u003e320–540+ W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum DC Input Voltage\u003c\/td\u003e\n\u003ctd\u003e65V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMPPT Voltage Range\u003c\/td\u003e\n\u003ctd\u003e16–60V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStart-Up Voltage\u003c\/td\u003e\n\u003ctd\u003e22V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum DC Input Current\u003c\/td\u003e\n\u003ctd\u003e14A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Input Short-Circuit Current\u003c\/td\u003e\n\u003ctd\u003e25A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of MPPT Trackers\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePV Inputs per MPPT\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"section\"\u003e\n\u003ctd colspan=\"2\"\u003eAC Output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated AC Output Power\u003c\/td\u003e\n\u003ctd\u003e420VA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated AC Output Current\u003c\/td\u003e\n\u003ctd\u003e3.5A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal AC Voltage\u003c\/td\u003e\n\u003ctd\u003e120V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAC Operating Voltage Range\u003c\/td\u003e\n\u003ctd\u003e90–150V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Frequency\u003c\/td\u003e\n\u003ctd\u003e60Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency Range\u003c\/td\u003e\n\u003ctd\u003e55–65Hz, subject to local settings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Factor\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;0.99 default; adjustable from 0.8 leading to 0.8 lagging\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Harmonic Distortion\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;3%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"section\"\u003e\n\u003ctd colspan=\"2\"\u003ePlug-and-Play Cable Interface\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAC Cable Connector Type\u003c\/td\u003e\n\u003ctd\u003eFlex-S3 Field Connector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpecified Cable Gauge\u003c\/td\u003e\n\u003ctd\u003e14 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpecified Plug-In Cable Length\u003c\/td\u003e\n\u003ctd\u003e15 ft \/ 4.57 m; customizable through distributor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAC Plug Type\u003c\/td\u003e\n\u003ctd\u003eType B\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAC Cable Included\u003c\/td\u003e\n\u003ctd\u003eNot established by the datasheet; verify package contents\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"section\"\u003e\n\u003ctd colspan=\"2\"\u003eEfficiency and Performance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePeak Efficiency\u003c\/td\u003e\n\u003ctd\u003e95.5%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal MPPT Efficiency\u003c\/td\u003e\n\u003ctd\u003e99.8%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNight Power Consumption\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;50mW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"section\"\u003e\n\u003ctd colspan=\"2\"\u003eMechanical Specifications\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions (W × H × D)\u003c\/td\u003e\n\u003ctd\u003e7.17 × 6.46 × 1.18 in \/ 182 × 164 × 30 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e4.0 lb \/ 1.8 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnclosure Rating\u003c\/td\u003e\n\u003ctd\u003eNEMA 6 \/ IP67\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-40°F to +149°F \/ -40°C to +65°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCooling\u003c\/td\u003e\n\u003ctd\u003eNatural convection; fanless\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"section\"\u003e\n\u003ctd colspan=\"2\"\u003eCommunication and Compliance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWireless Communication\u003c\/td\u003e\n\u003ctd\u003e2.4GHz WiFi + Bluetooth\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMonitoring Interface\u003c\/td\u003e\n\u003ctd\u003eLED indicator and S-Miles Home app\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInverter Topology\u003c\/td\u003e\n\u003ctd\u003eGalvanically isolated high-frequency transformer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer-Listed Compliance\u003c\/td\u003e\n\u003ctd\u003eUL 1741, UL 3700, IEEE 1547\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCybersecurity Standard\u003c\/td\u003e\n\u003ctd\u003eETSI EN 303 645, per manufacturer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDatasheet\u003c\/td\u003e\n\u003ctd\u003eHoymiles HiFlow (360–500) Pro LV, North America, REV1.1, ©2026\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"uss-faq\"\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the Hoymiles HiFlow Pro LV microinverter?\u003c\/summary\u003e\n\u003cp\u003eIt is a plug-in solar microinverter designed to convert electricity from a compatible solar panel into grid-synchronized AC power for small residential solar applications.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use this microinverter with a bifacial solar panel?\u003c\/summary\u003e\n\u003cp\u003eYes, provided the panel's voltage and current characteristics remain within the microinverter's specified limits, including potential additional current from rear-side solar generation.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDoes the microinverter have built-in WiFi?\u003c\/summary\u003e\n\u003cp\u003eYes. The HiFlow Pro LV includes built-in WiFi and Bluetooth for supported monitoring and commissioning functions through the S-Miles Home app.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDo I need a separate Hoymiles DTU?\u003c\/summary\u003e\n\u003cp\u003eNo. Hoymiles specifies direct wireless communication through the S-Miles Home app without requiring an additional DTU.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDoes the microinverter include the plug-in AC cable?\u003c\/summary\u003e\n\u003cp\u003eThe manufacturer datasheet specifies the compatible plug-and-play cable connection but does not confirm that the complete cable is included with every microinverter. Check the selected product package before ordering.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan the microinverter produce more electricity than its rated AC output?\u003c\/summary\u003e\n\u003cp\u003eNo. A compatible solar panel may have a higher DC nameplate rating, but the microinverter limits AC production to its rated output capability under normal operating conditions.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDoes the Hoymiles HiFlow Pro LV meet UL 3700?\u003c\/summary\u003e\n\u003cp\u003eHoymiles lists UL 3700 among the compliance standards on its North American REV1.1 datasheet. Confirm the applicable certification listing and local regulatory requirements before making an installation or interconnection decision.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWill the microinverter work during a power outage?\u003c\/summary\u003e\n\u003cp\u003eNo. This is a grid-connected microinverter, not a standalone backup power system. It is not designed to continue supplying household power when the utility grid is unavailable.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I connect a battery directly to this microinverter?\u003c\/summary\u003e\n\u003cp\u003eThe manufacturer describes the HiFlow Pro LV as a photovoltaic microinverter, not a battery charger or hybrid inverter. Direct battery connection is not an identified supported application.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs plug-in solar legal everywhere in the United States?\u003c\/summary\u003e\n\u003cp\u003eNo. Plug-in solar rules and utility interconnection requirements vary by jurisdiction. Product compliance with an equipment standard does not automatically authorize plug-in operation in every state or utility territory.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c\/article\u003e","brand":"Hoymiles","offers":[{"title":"Default Title","offer_id":53420313968938,"sku":"USSSP202-1430","price":151.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0566\/3408\/1340\/files\/Hoymiles_HiFlow_Pro_LV_420W.webp?v=1793573748","url":"https:\/\/ussolarsupplier.com\/products\/hoymiles-hiflow-pro-lv-420w-plug-in-wifi-microinverter-hms-420-1wm-lv","provider":"US Solar Supplier","version":"1.0","type":"link"}