Solar
- PV voltage
- PV current
- PV power
- Each string, where the inverter has two
See at a glance whether the panels give what they should, and spot a shaded or dirty string.
Home / What Growatt Monitor reads
What Growatt Monitor reads
The inverter’s registers, turned into clear values and daily totals.
- Every few secondson the screen and at home
- 3 yearsof history in the free Cloud
- 0settings written to your inverter
Plug & playPlug in, join your Wi-Fi, done: about a minute. No app, no tools, pre-configured for your Growatt.See the 3 steps →
GROWATT MONITOR
PV3.18kW
LOAD1.24 kW
BATT78 %
GRID0.00 kW
MODESOLAR
192.168.1.57 · moniwatt.local
Live values
Everything your Growatt inverter knows, in one place
Read from the RS485 port, refreshed every few seconds, explained in plain words.
Battery
- Voltage
- Charge and discharge current
- Power
- Level as the inverter sees it
Know whether the battery is filling or emptying right now, and how fast.
Grid
- Voltage
- Frequency
- Import or export power, where the inverter measures it
Catch a grid cut the minute it happens, even when you are away.
House
- Load power
- Load percentage
- Output voltage and frequency
Find what your home really draws, day and night.
Inverter
- Operating mode
- Internal temperature
- Running state
Grid, solar or battery mode: you know which source powers the house.
Warnings
- Active warnings
- Fault codes, explained in plain words
No more looking up a cryptic code in a PDF manual.
The exact list depends on your model and its firmware. Tell us your model when you order: your box is prepared and tested for it.
Try it
Where your energy goes, hour by hour
Pick a moment of the day: this is what Growatt Monitor shows you, live, about your Growatt system. Values simulated.
Solar—
House—
Battery—
Grid—
Worked out for you
Not just numbers: answers
The dashboard turns the raw values into the things you actually want to know.
Self-sufficiency
The share of your consumption covered by the sun and the battery, day by day.
Where the solar went
What the panels produced each day, next to what the house used and what came from the grid.
Battery time left
At the current pace, when the battery will be full, or empty.
Your daily balance
Solar, house, battery and grid in kWh, so a week of data tells you if the system is well sized.
Home Assistant automations
Your appliances run on the sun, by themselves
Growatt Monitor tells Home Assistant how much the panels produce, in real time. Four simple rules, and the washing machine, the water heater and the car use your sun instead of the grid. Watch a day:
10:00
Your solar production
Your consumption
Automations
- Washing machine on the sun
- The car follows the sun
- Hot water for free
- Gentle evening heating
Logbook
- Solar production
- House and heating
- Washing machine
- Water heater
- Electric car
- Battery level
- From the grid
- Sold to the grid for little
Solar used at home0 %
Bought from the grid0
Self-sufficiency0 %
Saved on this day0vs. the same day without automation
Over a year0if 150 days look like this one
Simulation of a sunny day for a house with 5 kWp of panels, a 10 kWh battery, a car that needs 10 kWh and a water heater. The energy delivered to each appliance is the same in both scenarios; only the timing changes. Your figures depend on your system, your tariff and the weather.
Alerts
An e-mail when something needs you
Set them once in your free Cloud account, box by box. No app to keep open.
- The box goes quietNo reading for 6 hours: power cut, Wi-Fi down, unplugged cable.
- Charge below your thresholdBefore the reserve is gone, not after.
- Temperature too highA hot loft or a blocked fan, caught early.
- Alarm raisedA warning or fault from the inverter, with its meaning.
Growatt Monitor · just now
Grid cut: running on battery
The grid disappeared at 14:32. The inverter runs on solar and battery (64 %). You will get another e-mail when the grid is back.
Open the dashboard
History
Three years of curves, free
The screen shows the present. The free Cloud keeps everything else.
- Day by day, hour by hour14 days of energy at a glance, then any day in detail.
- Up to 3 yearsCompare winter and summer, this year and last.
- CSV exportEverything stored, ready for your spreadsheet.
Where to see it
Six ways to look at the same data
The screen on the boxReadable at a glance when you walk past.
The local dashboardhttp://moniwatt.local on any phone or computer at home, without internet.
The free CloudFrom anywhere in the world, with history and alerts.
Home AssistantEvery sensor created automatically, no YAML
JSON API and MQTTFor your own scripts, Grafana or anything that reads JSON.
Jeedom · Node-RED · DomoticzStep-by-step guides for each one.
What Growatt Monitor will never do
- Change a setting, a mode or a limit of your inverter
- Send your data anywhere unless you switch the Cloud on
- Get in the way: unplug it and everything is as before
- Ask for a subscription
Growatt inverter screen, Wi-Fi logger or Growatt Monitor?
What each option really gives you, in short.
| Inverter screen | Wi-Fi dongle and maker’s cloud | Growatt Monitor | |
|---|---|---|---|
| Readable from anywhere in the world | — | ✓ | ✓ |
| Keeps working without internet | ✓ | — | ✓ |
| Home Assistant sensors without ESP32 or YAML | — | — | ✓ |
| A screen next to the equipment | ✓ | — | ✓ |
| Never changes a setting | — | — | ✓ |
In detail
Growatt Monitor, value by value
Live values
| Area | Values |
|---|---|
| Solar | PV1 and PV2 voltage and power, total PV power |
| Battery | State of charge, voltage, charge or discharge power, temperature |
| Grid | Voltage, frequency, import or export power |
| House | Consumption, backup (EPS) output when in use |
| Inverter | Output power, internal temperature, running state, priority mode |
| Faults | Fault and warning codes, with their meaning |
Daily energy totals
- Solar production today
- Battery charge and discharge today
- Grid import and export today
- House consumption today
They come from the inverter’s own counters, so they match the figures on the inverter display.
Single-phase and three-phase
The SPH and MIN TL-XH ranges are single-phase; SPH TL3 and MOD TL3-XH are three-phase. Their register maps differ slightly, and Growatt uses an older and a newer version of its protocol depending on the generation. Tell us the exact model from the label when you order: the box is prepared and tested for it.
Where to see it
- Screen on the box: PV, battery SOC, grid and load at a glance.
- Local dashboard at
http://moniwatt.local, password protected. - Home Assistant through MQTT discovery.
- JSON API for Node-RED, Grafana or your own code.
- Cloud dashboard, optional and free, with history and offline alerts.
What it leaves alone
Growatt Monitor only reads. It does not change the priority mode, the time slots, the export limit or the battery settings. Your ShineWiFi or ShineLAN stick can stay in place.
Keep reading
Your Growatt inverter, live at home and anywhere in the world
Order Growatt Monitor today. Prepared and tested for your Growatt model, dispatched on 10 November 2026.
Plug & play: working in about a minute
Pre-order for €49Pre-order price · €59 from 10 Nov · ships on 10 November 2026 · free cancellation until dispatch