Do Shelly devices need a constant internet connection to work?

No. Once Elewatt pushes a schedule to your Shelly device, the schedule is stored locally on the device and executes independently — even if your router or internet goes down. Internet is only needed when Elewatt syncs a new schedule (once per day, in the afternoon after Nord Pool prices are published).

Are Shelly devices reliable for frequent on/off switching?

Yes. Shelly relays are rated for 100,000+ switching operations — at one switch per day that is 270+ years of use. They are widely used in professional home-automation and commercial installations. Resistive loads like heaters and water heaters are the easiest possible load for a relay.

Is my data secure when using Shelly with Elewatt?

Elewatt communicates with your Shelly devices exclusively through the official Shelly Cloud API using your personal API key. No third party has access to your device. Your device itself operates on your local Wi-Fi network and can work entirely offline after a schedule is pushed.

Which Shelly devices work with Elewatt?

Any Shelly device that supports the Shelly Cloud API and has a schedule feature works with Elewatt — including Shelly Plug S Gen3, Plus 1PM, Pro 3, Pro 4PM, and others. The Shelly Plug S Gen3 is the easiest starting point: no wiring, plug and play, up to 2.5 kW.

Can I use Elewatt without any Shelly device?

Yes. Elewatt also works as a price monitoring and notification tool — you can track real-time spot prices, set up alerts when prices drop below a threshold, and view your historical electricity costs. Smart device control is an optional add-on for those who want full automation.

What happens if Shelly Cloud is unavailable when Elewatt tries to push a schedule?

Elewatt retries automatically. If Shelly Cloud is temporarily unreachable, your device keeps running its previous schedule from the day before until a new one is successfully pushed.

Shelly Integration

Smart Control for Shelly Devices

Automate your Shelly smart relays and power meters based on live electricity prices — from full automation to simple price syncing.

Reedik Lindau

Published 13 March 2026 · Updated 22 September 2026

Connect Shelly Create free account

Automate Shelly Devices

Push daily on/off schedules directly to your Shelly relays based on tomorrow's electricity prices. Devices switch on automatically during the cheapest hours — no manual intervention needed.

Set Up Automation

Remote On/Off Control

Turn any connected Shelly device on or off directly from your Elewatt dashboard. Take manual control whenever you need, from anywhere.

Manage Devices

Energy Consumption Monitoring

View real-time and historical power usage data from your Shelly smart meters. Understand exactly when and how your electricity is being consumed.

View Consumption

Electricity Tariff API

Automatically update the electricity price in your Shelly Cloud account with live spot prices. Works independently — no need to connect devices to Elewatt. Perfect if you just want accurate pricing inside the Shelly app.

Set Up Price Sync

Price-Based Automations

Set custom price thresholds to automatically activate or deactivate your Shelly devices when electricity prices rise or fall. Let the market decide when your devices run.

Create Filters

Ready to automate your home?

Connect your Shelly devices and let electricity prices do the thinking.

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Smart Control for Shelly Devices

Automate Shelly Devices

Remote On/Off Control

Energy Consumption Monitoring

Electricity Tariff API

Price-Based Automations

Ready to automate your home?

Frequently Asked Questions

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