Frequently asked questions

You can start using the service for free during beta. The beta package lets you test the service with up to 5 devices.

We support MQTT-compatible devices. In practice, Shelly Plus and Pro devices are the most common choice. See the Devices guide for examples.

Yes. The mobile app lets you quickly check status, follow savings and control devices manually.

Partly yes. Offline scheduling can store the schedule on the device in advance, so control can continue through a short outage.

No. If you can connect a device to your home network and copy MQTT credentials, you can get started.

The first device usually takes around 5 minutes. Additional devices are often faster once you know the basic steps.

If the device requires fixed electrical installation, use a qualified electrician. Do not do mains electrical work yourself without the required qualifications.

Sign in and open the MQTT credentials page. Copy the host, port, username and password exactly as shown.

Yes. It is enough to open the device web UI, connect it to your home network and enter the Optimaatti MQTT credentials.

Spot prices are fetched automatically from an official source. Next-day prices usually appear in the afternoon.

Prices update automatically every day. If the next-day prices are missing for a while, wait a bit and check again.

Yes, but the biggest savings benefit comes from spot pricing. With a fixed contract, you can still use schedules, temperature control and other automations.

That depends mostly on what you control. The biggest impact usually comes from heating, water heaters and other flexible loads.

Savings compare your real usage and timing against a comparison model, so you can see whether the timing was cheaper than ordinary use.

Often within the first few days. The longer the system runs, the more reliable the savings view becomes.

Yes. We use encrypted connections (TLS/SSL) and user-level isolation.

No. Each user has separate MQTT credentials and only your devices are visible to you.

You can reset your account password by email. You can regenerate the MQTT password from the MQTT credentials page.

Start with the basics: the device is online, MQTT is enabled and the Optimaatti credentials were copied correctly. Then wait a moment and refresh the Devices view.

The most common reason is that the rule is not active or the wrong output was selected. Also check that another rule is not overriding the same device.

Wait a little first if next-day prices have not been published yet. If the issue continues for a long time, open the Troubleshooting guide.

Start with a simple price rule for straightforward loads such as a water heater. Choose MPC when you want to keep room temperature comfortable while also saving money.

Often yes. It is a safe way to see how the system predicts before you allow it to control automatically.

It is a more detailed temperature model for slow-reacting systems such as floor heating. Most users do not need to start with it.

No, as long as you set sensible limits. You define the minimum temperature and MPC stays within those boundaries.

Yes, but the biggest financial benefit comes with spot pricing. With a fixed contract, the benefit is more about smoother and smarter heating.