Every few seconds
Live power flows instead of a five-minute cloud refresh, so automations react in time.
Pre-order · ships on 10 November 2026
Your Deye inverter, in real time, without the cloud
The Solarman app refreshes every few minutes and depends on a server in another country. MoniWatt for Deye reads your Deye inverter directly, every few seconds, on your own network.
- Colour screen + Wi-Fi dashboard
- Home Assistant · JSON · Jeedom
- Free Cloud, no subscription
< 0.5 Wpowered by USB-C
0settings written to your inverter
€0for the Cloud, forever
10 Novpre-orders ship
Deye hybrid inverters, single-phase and three-phase, are installed in huge numbers across Europe, South Africa and beyond, and the same platform is also sold under other names. Out of the box, their data goes through a Wi-Fi logger to the Solarman cloud: you see it in an app with a delay, and if the cloud or your internet is down, you see nothing.
MoniWatt for Deye takes the local route. It connects to the inverter’s RS485 Modbus port and reads its registers directly: solar, battery, grid, load and the energy totals of the day. You get a screen next to the inverter, a dashboard on your phone over home Wi-Fi, and Home Assistant sensors that update every few seconds. It reads only; your inverter settings and your Solarman logger stay as they are.
What you get
Solar, string by string
PV1 and PV2 voltage and power, plus the day’s total production.
Battery as Deye sees it
State of charge, power, voltage, current and temperature from the inverter’s battery side.
Grid import and export
What you buy, what you sell, and the load of the house, from the inverter’s CT readings.
Works without internet
When the cloud or your connection is down, the local dashboard and Home Assistant keep running.
Read-only
Work mode, time-of-use and charge settings stay exactly as your installer set them.
Power flows you can act on
The dashboard shows the four flows of a hybrid system on one chart: panels, battery, grid and house. You see when the battery hits full and the surplus starts flowing to the grid, which is the exact moment to start the water heater or the EV charger. At night you see what the battery covers and what you still buy.
The optional remote dashboard keeps up to three years of history, independent of the Solarman portal.
Live dashboardLive
Solar3.48kW
Load1.21kW
Battery53.1V
SolarLoadState of charge
Your data, your way
The box answers GET /api.json on your network and publishes the same values over MQTT. Home Assistant, Jeedom, Node-RED or your own script read them directly, with no cloud round-trip.
GET http://moniwatt.local/api.json?key=YOUR_KEY
{"pv_w": 4310, "pv1_w": 2190, "pv2_w": 2120,
"batt_soc": 88, "batt_w": 1650, "batt_temp": 24.0,
"grid_w": -1420, "load_w": 1240,
"today": {"pv_kwh": 18.2, "import_kwh": 1.1, "export_kwh": 6.4}}
Up and running in three steps
- PlugThe supplied cable goes into the RS485 port of your Deye inverter; USB-C into any phone charger.
- ConnectJoin the box’s Wi-Fi from your phone, pick your home network and set a password. No app to install.
- WatchOpen the dashboard in any browser, add it to Home Assistant, and set your alerts.
Made for Deye
| Models | Deye hybrid inverters, single and three phase |
|---|---|
| Connection | RS485 port, RJ45 cable included |
| Your existing wiring | Untouched: the box reads, it never writes |
| Network | Your home Wi-Fi (2.4 GHz); works without internet |
| Integrations | Home Assistant (MQTT auto-discovery), JSON API, Jeedom, Node-RED, Domoticz, openHAB |
| Cloud | Free and optional: live dashboard, 3 years of history, CSV |
| Power | USB-C, under 0.5 W |
Another Deye model? Tell us when you order: your box is prepared and tested for it.
Modbus over RS485, plug-in
Deye hybrids expose an RS485 Modbus port for monitoring, separate from the BMS port used by your battery and from the port of the Wi-Fi logger. The box plugs into it with an RJ45 cable and is powered over USB-C., colour screen.
It is built on the design of Pylon-Monitor, our Pylontech battery monitor, with an RS485 / CAN board and firmware that reads the Deye register map.
Designed and assembled in France
Each box is prepared and tested in France before it ships, by the team that makes Pylon-Monitor for Pylontech owners.
Questions before buying? Write to [email protected]: a person answers.
MoniWatt for Deye
€49.00
Pre-order price until 9 November 2026 · €59 afterwards
Shipping calculated at checkout
- MoniWatt for Deye with colour screen and RS485 / CAN interface
- RJ45 cable for the inverter’s Modbus port
- USB-C cable
- Free Cloud Access, no subscription
Ships on 10 November 2026 · free cancellation until dispatch
Your Deye inverter, live and local
Order MoniWatt for Deye today. Prepared and tested for your Deye model, dispatched on 10 November 2026.
Pre-order for €49Pre-order price · €59 from 10 Nov · ships on 10 November 2026 · free cancellation until dispatch