The Hoymiles HiFlow Pro LV is a plug-in microinverter engineered for residential balcony, terrace, and garden solar installations. With a true plug-and-play design, built-in Wi-Fi and Bluetooth, and no DTU required, it’s one of the simplest and safest ways to add solar to your home. Available in 360W, 420W, 450W, and 500W output configurations to match your panel setup.
Key Features
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Plug-and-Play Installation – Flex-S3 field connector with 15-ft cable and standard Type B plug; no electrician or complex wiring required
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Built-In Wi-Fi + Bluetooth – No separate DTU needed; commission and monitor directly through the S-Miles Home app
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Advanced MPPT Algorithm – Supports multiple PV orientations and delivers 99.80% nominal MPPT efficiency for maximum energy harvest
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Up to 500W Output – Handles panels ranging from 280W up to 670W+ depending on model
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Galvanically Isolated HF Transformer – Integrated rapid shutdown and arc fault elimination for enhanced safety
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IP67 Weatherproof – NEMA 6 enclosure rated for full outdoor exposure; no fans, passive cooling only
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Cybersecurity Certified – Meets ETSI EN 303 645 standards for data privacy and protection
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Grid Compliant – UL 1741, UL 3700, and IEEE 1547 certified for North American grid connection
Technical Specifications
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Models Available: HMS-360-1WM-LV / HMS-420-1WM-LV / HMS-450-1WM-LV / HMS-500-1WM-LV
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Rated Output Power: 360 / 420 / 450 / 500 VA
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Nominal Output Voltage: 120V (range: 90-150V)
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Nominal Frequency: 60 Hz (range: 55-65 Hz)
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MPPT Voltage Range: 16-60V | Start-up: 22V
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Peak Efficiency: 95.50%
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Power Factor: >0.99 default (0.8 leading to 0.8 lagging adjustable)
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THD: <3%
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Connector: Flex-S3 Field Connector, 14 AWG, 15 ft / 4.57m cable, Type B plug
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Dimensions: 7.17 x 6.46 x 1.18 in (182 x 164 x 30 mm)
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Weight: 4.0 lb (1.8 kg)
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Enclosure: NEMA 6 / IP67 outdoor-rated
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Cooling: Natural convection, no fans
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Communication: 2.4G Wi-Fi + Bluetooth
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Certifications: UL 1741, UL 3700, IEEE 1547, ETSI EN 303 645
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Operating Temp: -40 to +149 F (-40 to +65 C)
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Night Power Consumption: <50 mW
Applications
- Balcony and terrace plug-in solar systems
- Garden and backyard small-scale solar
- Apartment and rental property solar installations
- Starter solar setups requiring zero-permit, plug-in simplicity
- UL 3700-compliant plug-in solar in jurisdictions requiring certification
Recommended Pairing
The HiFlow Pro LV pairs with any standard residential solar panel in the appropriate wattage range. For a complete plug-in system, pair with a 400-600W monocrystalline panel and the included Flex-S3 cable. Monitor and configure via the free S-Miles Home App (iOS and Android).
Frequently Asked Questions
Do I need an electrician to install this?
No. The HiFlow Pro LV is designed for homeowner installation. It plugs into a standard Type B outlet via the included cable and connects to your solar panel via MC4 connectors.
Do I need a separate monitoring gateway (DTU)?
No. Built-in Wi-Fi and Bluetooth connect directly to the S-Miles Home app without any additional hardware.
Which solar panel sizes does it support?
The 360W model supports panels from 280-470W+. The 420W supports 320-540W+. The 450W supports 360-600W+. The 500W supports 400-670W+ panels.
Is this approved for grid connection in the US?
Yes. It is UL 1741 and UL 3700 certified and IEEE 1547 compliant for North American residential grid-tied use.
What is the warranty?
Please contact Solwel for current warranty terms on Hoymiles products.
