Growatt Monitor FAQ

Growatt hybrid inverters with an RS485 Modbus link: the SPH range, MIN TL-XH and MOD TL3-XH. Tell us the model on the label when you order; your box is prepared and tested for it.

Several SPF models are on our list, but their communication ports vary between versions. Send us a photo of the label and of the ports before ordering and we tell you.

No. The stick uses its own port. You can keep ShinePhone and use Growatt Monitor for fast local data.

No. Reading only. The priority mode and the time slots stay in the inverter menu or in your installer’s tool.

Each inverter answers on its own Modbus address. Tell us how many you have.

No. The local dashboard, MQTT and JSON work on your Wi-Fi alone. With an internet link, the free Cloud adds your inverter on your phone anywhere in the world.

On 10 November 2026 at the latest. Each box is assembled with its RS485 board, prepared for your model and tested before it ships. If we miss the date, full refund unless you prefer to wait.

Yes, any time before dispatch, with a full refund including shipping. After delivery, 14 days to return it.

Two years. If your model turns out not to be supported once delivered, return it within 30 days for a full refund; we pay the return.

No. Growatt Monitor (MoniWatt for Growatt) is an independent accessory designed in France. Growatt is a trademark of its owner.

No, it is plug and play: plug the cable into the RS485 port of your Growatt inverter and USB-C into a phone charger, then join the box’s Wi-Fi from your phone to give it your home network. About a minute, without tools, app or setting changed on the inverter. The box arrives prepared for your model.

No. The RS485 port is a low-voltage communication port: you plug in while the inverter runs, nothing to open inside.

No. Setup is done in your phone’s browser, through the box’s own Wi-Fi. The free Cloud account is optional, only to see your system from away.

No. The box only reads: work mode, charge settings and limits of your inverter stay exactly as they are.

Change it from the box settings page. If the box cannot reach your network for a few minutes, it opens its setup Wi-Fi again by itself.

Yes, and they can follow your system from their own Cloud access, while you keep yours.

Solar, battery, grid, house load, inverter mode and temperature, and active warnings, as the inverter reports them on its RS485 port. The exact list depends on the model: tell us yours when you order and your box is tested for it.

Every few seconds on the screen and the local dashboard, about every 2 minutes on the free Cloud, which keeps the history.

No. It only sends read requests. Nothing it does can change a setting, a mode or a limit of your equipment.

No. The screen, the local dashboard, Home Assistant and the JSON API work on your home Wi-Fi alone. The internet is only needed for the free Cloud, to see your system from anywhere.

Yes: CSV export from the free Cloud, with up to 3 years of history, and live values at any time through the local JSON API or MQTT.

No. The box talks MQTT, which Home Assistant understands natively, and announces its own sensors (MQTT discovery). Nothing to install on the box, nothing to code.

No: in Home Assistant, Settings › Add-ons › Mosquitto broker › Install, then Start. Home Assistant then offers to configure MQTT: one click. Two minutes, once, and it serves every MQTT device you will ever add.

No. Everything stays on your home network: the box speaks directly to Home Assistant. The free Cloud is a separate option, for seeing your system from anywhere.

Yes. Screen, local dashboard, Home Assistant and Cloud all work together, and none of them changes anything on your inverter.

No. All of them read the box directly on your home network, through MQTT or the local JSON API. The Cloud is only for seeing your system from away, or for online services like IFTTT.

On the box’s page, Settings › Access key & Cloud. You can generate a new one at any time; the old one then stops working.

The box keeps the latest reading, refreshed every few seconds. Polling every 30 to 60 seconds is plenty; MQTT pushes each new reading without polling.

No. The box only reads your equipment: no command sent through MQTT or the API can change a setting.

Not natively. IFTTT, Make.com or Apilio can read the private JSON link of the free Cloud and trigger Tuya or SmartLife scenes.

Yes, with no subscription and no paid tier: live dashboard, 3 years of history, CSV export and e-mail alerts are included with the box.

No. You sign in with your e-mail: we send you a one-time link. Your box is linked to your account with its access key.

The screen, the local dashboard and Home Assistant keep working at home. The Cloud picks up again as soon as the connection is back, and can e-mail you if the box stays silent for 6 hours.

Yes. Your installer, or anyone you give the access key to, can link the box to their own account. You can change the key whenever you like.

Untick the option in the box settings and it stops sending at once. Stored readings are deleted on request, with one e-mail.

Yes, on the SPH TL3 and MOD TL3-XH ranges. Tell us the exact model when you order so we prepare the right register map.

Pre-orders ship on 10 November 2026. Delivery then takes 2 to 10 days depending on the country; you receive the tracking link by e-mail the day it leaves.

Yes, at any time before dispatch, for any reason: reply to your confirmation e-mail or use the online form. You get 100% back, shipping included.

Return the box within 30 days of delivery: we refund it in full and pay the return shipping.

Payment is handled by Stripe. Your card details never reach our servers, and your bank may ask you to confirm the payment.

Not within the European Union. Elsewhere (United Kingdom, Switzerland, Norway, United States…), import duties and taxes may be charged by the carrier on delivery.

Growatt Monitor gives your Growatt inverter a dashboard on your Wi-Fi at home and, through the free Cloud, on any phone or PC anywhere in the world, with three years of history. Nothing to install.

Yes: open http://moniwatt.local in any browser on your network, or the free Cloud dashboard from anywhere. No Windows software needed.

Yes. Growatt Monitor reads the inverter directly through its RS485 port and shows everything on your Wi-Fi and in Home Assistant, even without internet. The free Cloud is optional.

Enter your MQTT broker in Growatt Monitor: Home Assistant creates the PV, battery, grid and load sensors by itself, ready for the Energy dashboard. No ESP32, no YAML.