Microinverter

The Hoymiles HMS-800W-2T is the powerful successor to the legendary HM series and sets new standards for modern balcony power plants. With a maximum output power of 800 watts this micro inverter gets the most out of your solar modules and is optimally prepared for the current legislation.The "2T" in the name stands for two independent MPPT trackers. This means you can connect two solar modules, which are controlled completely independently of each other. If one module is in the shade or has a different alignment, the second module still runs at full power. Compared to the previous series, the HMS-800W-2T uses the more stable Sub-1G radio technology (for greater range to DTU) and the new BC05 plug-in system.Highlights at a GlanceHigh output power (800 watts): Delivers a full 800 VA of power into the household grid, making it ideal for the maximum permissible feed-in limit of balcony power plants.Two independent MPPT trackers: Guarantees the maximum yield from each individual module, even with partial shading or different alignment (e.g. east/west).Stable Sub-1G communication: Offers a noticeably more stable and wider-reaching connection through walls when used with an (optional) DTU compared to conventional Wi-Fi.New connection system (BC05): Equipped with the proprietary Hoymiles "Field Connector" (BC05) for rapid and extremely watertight installation.Reactive power control: Complies with the VDE-AR-N 4105:2018-11 standard and supports grid stability by providing reactive power.Robust design (IP67): The fully sealed housing is dust- and waterproof and designed for decades of outdoor use in the harshest conditions.Flexible limiting: Using an optional DTU unit, the output can be temporarily restricted to 600 watts via app (S-Miles Cloud) if required.Areas of ApplicationThe HMS-800W-2T is the standard solution for:Balcony power plants (2 modules): The classic – two modules on the balcony railing for maximum self-sufficiency covering your electricity needs.Garages & Carports: Thanks to high protection class IP67 can be safely used on flat roofs.Garden sheds: Easy installation “Plug & Play” (with suitable Schuko cable).Shaded locations: Where a string inverter would fail, the HMS-800 still extracts energy thanks to single MPPT.Mounting & Safety InstructionsCable selection (Important!): The HMS-800W-2T uses the new BC05 connection (rectangular, flat). It is not compatible with the old Betteri BC01 cables from the HM series. When purchasing the connection cable, be sure to look for the note "for HMS series" or "BC05".Distance to the surface: Mount the inverter with at least 2 cm distance to the mounting surface (roof/wall) so that air can circulate behind the unit (passive cooling).Hot Spot: The metal housing acts as a heat sink and in summer at full load can become up to 80°C hot. This is normal, but avoid touching during operation.Earthing: The device is earthed via the AC connection. Additional grounding on the housing is possible, but not usually mandatory if a compliant Schuko/Wieland cable is used (observe local VDE standards). Features ModelHoymiles HMS-800W-2T Max. recommended PV power**320 W to 540 W+** (per module) Maximum output power**800 VA** (adjustable to 600 VA) MPPT number / inputs**2 MPPT** / 2 DC inputs Max. DC input voltage**65 V** Max. input current (DC)**2 x 14 A** (Compatible with modern 500W+ modules) Communication**Integrated Wi-Fi** (2.4 GHz) AC connection**BC05 connector** (HMS series) Efficiency (CEC)**96.7 %** Protection class**IP67** (dust-tight & protection against temporary submersion) Dimensions (W x H x D)261 x 180 x 35.1 mm FAQs about the Hoymiles HMS-800W-2TWhat is the difference with the Hoymiles HM-800?The HMS is the newer generation. The main differences are:Radio: HMS uses Sub-1G (better range) instead of 2.4 GHz (HM).Connection: HMS uses the BC05 connector, HM uses Betteri BC01.Amperage: The HMS tolerates higher input currents (14A), making it more compatible with modern high performance modules (400W+).Do I necessarily need a DTU (Data Transfer Unit)?For pure operation ("generate power"): No. As soon as the sun shines and the grid is present, it generates power. For monitoring (app) and settings (throttling to 600W): Yes. As the HMS-800W-2T does not have integrated Wi-Fi, you need the DTU-Lite-S stick for app connection.Can I limit the inverter to 600 watts?Yes. When used together with a DTU and an installer account in the S-Miles Cloud, the output power can be limited as a percentage (e.g. to 75% = 600W) to comply with current registration requirements.

The NEP BDM-800 (Northern Electric & Power) is a powerful, dual microinverter specially designed for modern balcony power plants. With a maximum output of 800 Watt it fully exploits the legal feed-in limits and ensures maximum yield.A key advantage of this model over many competitors is the already permanently integrated WLAN module. You do not need an additional base station (like a DTU) to read out the yield data. The inverter connects directly to your home router. Thanks to two independent MPPT trackers, it individually controls two connected solar modules, which optimises the overall yield especially in case of partial shading or different orientations (e.g. east/west).Highlights at a glanceHigh output power (800 watts): Reliably feeds up to 800 VA into the home grid, ideal for maximum yield from standard balcony power plants.Integrated WLAN: No external gateway or additional stick required; the device sends yield data straight to the free NEPViewer app.Two independent MPPT trackers: Guarantees the best yield from each of the two modules, even if one is partially shaded.Integrated NA protection: Complies with the German standard VDE-AR-N 4105 (including integrated relay) for safe and legal operation in Germany.High module compatibility: Handles high input currents and is therefore ideally suited for modern high-performance modules (400W to 600W+ per input).Robust & weatherproof: The aluminium housing is dust- and waterproof to IP67 and built for decades of outdoor use.Areas of applicationThe NEP BDM-800 is the uncomplicated all-rounder for:Balcony power plants (2 modules): The classic "plug & play" unit on the balcony railing for immediate reduction in the electricity bill.Garden & flat roof installation: Ideal, as the unit can be mounted outdoors directly behind the elevated modules thanks to IP67.Smart homes: For users who wish to monitor their electricity generation conveniently and without additional hardware on their smartphone (iOS/Android).Assembly & Safety InstructionsWLAN reception at the installation site: As the WLAN module is located in the metal housing of the inverter, please check with your smartphone before permanent installation whether sufficient WLAN signal from your router still reaches the balcony/roof.Ventilation: The inverter uses its casing as a heat sink. Do not mount it directly on combustible materials and allow space to the rear of the module so that air may circulate.Throttling possible: If your local grid operator still insists on 600 watts, the NEP BDM-800 can usually be throttled in a certified manner via support or the app (and later increased back to 800W). Features ModelNEP BDM-800 Max. recommended PV power**2 x 600 Wp** Maximum output power**800 VA** Number of MPPT / Inputs**2 MPPT** (independent) Max. DC input voltage**60 V** Max. input current (DC)**2 x 17 A** Communication**WiFi integrated** (2.4 GHz) Efficiency (Max.)**97.3 %** Protection class**IP67** (weatherproof) Dimensions (W x H x D)268 x 250 x 42 mm  FAQs about the NEP BDM-800Do I need an extra antenna or a gateway for the app?No. The WLAN module and the antenna are already invisibly integrated in the housing of the BDM-800. You only need to connect the device to your home network (2.4 GHz) via the app during initial setup.Which plugs do I need to connect to the socket?The device usually has a standardised AC connection (often type Betteri BC01). To connect to the socket you need a suitable connection cable "Betteri to Schuko" (or to Wieland plug), long enough for your setup.What happens if my router fails? Will the NEP still produce electricity?Yes, absolutely. The WLAN connection is used purely for reading the statistics and yields in the app. As soon as the sun is shining and there is grid voltage, the inverter feeds electricity into your home grid – completely independently of the internet.