Become a Tester
Join the Yellow Grid Pilot Testing Programme
Do you have an electric boiler and use spot electricity prices? Or do you have a solar PV system, but are not yet using your self-generated electricity for intelligent boiler control?
We are looking for early users who would like to test Yellow Grid in real-life operation and help us further improve automatic water heating control.
Who Are We Looking For?
We are looking for two types of households to take part in our pilot testing programme:
A. You Have an Electric Boiler and Use Spot
Electricity Prices
Yellow Grid automatically analyses electricity prices and schedules water heating during the most cost-effective periods of the day.
You are a suitable tester if:
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you have an electric boiler,
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you buy electricity at spot prices,
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your boiler is not currently controlled according to electricity prices,
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you would like to take part in the pilot testing programme and share your experience with us.
B. You Have an Electric Boiler and a Solar PV System
Yellow Grid uses your solar PV generation forecast and schedules water heating primarily for periods when your own electricity generation is expected.
You are a suitable tester if:
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you have an electric boiler,
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you have a solar PV system,
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your boiler is not currently controlled automatically according to solar PV generation,
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you would like to take part in the pilot testing programme and share your experience with us.
What Do You Get?
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automatic boiler control based on electricity prices,
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the opportunity to reduce water heating costs,
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more efficient use of low spot electricity prices or your self-generated solar energy,
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access to the Yellow Grid solution at a special pilot price,
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the opportunity to contribute to the further development of the product.
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Pilot Device Prices
For participants in the pilot testing programme, we offer Yellow Grid devices at special introductory prices:
YG Heat 2KZ – LAN / Wi-Fi — CZK 2,000
YG Heat 1HZ – LTE — CZK 3,000
The Yellow Grid cloud platform is included in the solution and provided free of charge.
How Does the Pilot Testing Work?
Sign up → We check whether your installation is suitable → We select the right device version → We install Yellow Grid → You start testing
How Does Yellow Grid Work?
We connect Yellow Grid → the system learns → every day it analyses electricity prices or the solar PV generation forecast → it creates an optimal heating schedule → it automatically controls your boiler
How Yellow Grid Works
Smart Water Heating Control
Yellow Grid is a smart solution for automatically optimising hot water heating in electric boilers. It combines a control unit installed at the boiler with the Yellow Grid cloud platform, which analyses available data every day and creates an optimal water heating schedule.
The solution is designed for households using spot or dynamic electricity pricing, as well as for owners of solar PV systems. Depending on the installation type, Yellow Grid automatically selects the appropriate optimisation method.
The result is an automatically generated water heating schedule designed to minimise electricity costs while maximising the use of self-generated electricity and maintaining a sufficient supply of hot water.
After the initial setup, no regular user intervention is required. The solution operates automatically and creates a new water heating schedule every day.
The Yellow Grid cloud platform is included as part of the solution and is provided free of charge.
1. A New Heating Schedule Every Day
Every day, the Yellow Grid cloud platform creates an individual water heating schedule for each connected boiler.
Households Using Spot or Dynamic Electricity Pricing
The solution automatically evaluates:
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current electricity prices,
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distribution charges,
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historical household consumption,
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the current water temperature in the boiler.
Based on this information, Yellow Grid creates a heating schedule that uses the most cost-effective periods during the following day.
Households with a Solar PV System
If the installation includes a solar PV system, Yellow Grid uses a different optimisation algorithm.
Instead of analysing electricity prices, the system evaluates the forecasted solar PV generation based on weather forecasts and expected solar irradiance. Water heating is then scheduled primarily during periods when the highest solar energy production is expected.
In both cases, the day is divided into 96 fifteen-minute intervals, and the solution automatically selects the intervals that are most suitable for the specific household.
Before the start of each new day, the schedule is automatically sent to the control unit.
2. The Solution Continuously Learns
Regardless of the selected optimisation method, Yellow Grid continuously learns the characteristics of each boiler and the household's hot water consumption patterns.
It analyses, for example:
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how quickly the water heats up,
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the household's hot water consumption profile,
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how quickly the boiler cools down,
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the hot water reserve required to maintain user comfort.
This enables Yellow Grid to continuously refine the heating schedule and automatically adapt to changes in household behaviour and seasonal conditions.
What You Don't Have to Worry About
Once the device has been registered, the entire solution operates automatically.
You do not need to:
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monitor electricity prices,
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switch the boiler on manually,
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adjust the settings every day,
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analyse charts or weather forecasts.
Yellow Grid does all of this for you and automatically creates a new water heating schedule every day.
3. Installation
The Yellow Grid control unit is connected to an existing electric boiler in one of two ways.
Boilers with a Plug
If the boiler is connected using a standard mains plug, the Yellow Grid unit is simply installed between the electrical outlet and the boiler. Installation is quick and does not require any modifications to the electrical installation.
Boilers with a Fixed Electrical Connection
If the boiler is permanently wired, the Yellow Grid unit is installed in the power supply cable between the electrical distribution board and the boiler. This installation must be carried out by a qualified electrician in accordance with applicable regulations.
The installation also includes a temperature sensor, which is attached to the hot water pipe leaving the boiler. This allows the solution to monitor the current water temperature and optimise the heating schedule more accurately.
4. Connecting to the Yellow Grid Cloud
After installation, the control unit connects to the Internet via Wi-Fi, Ethernet or LTE, depending on the selected device version.
The device is then registered with the Yellow Grid solution using a simple setup wizard.
During the initial setup, the user enters information about the supply point, distribution tariff, electric boiler and, if applicable, the solar PV system. This information enables Yellow Grid to create an individual water heating schedule tailored to the specific household.
Once the registration is complete, no further configuration is required.
5. The First Days of Operation
During the first two weeks, the solution learns the characteristics of your boiler and your household's hot water consumption patterns.
It analyses, for example:
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how quickly the water heats up,
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the household's hot water consumption profile,
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how quickly the boiler cools down,
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the hot water reserve required to maintain user comfort.
Every household uses hot water differently. That is why Yellow Grid builds an individual operating model for each boiler, allowing it to optimise water heating as accurately as possible.
6. Who Is the Solution Designed For?
Yellow Grid is ideal for households that:
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use spot electricity pricing,
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have a dynamic electricity tariff,
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own a solar PV system and want to make better use of their self-generated electricity,
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are looking for simple automation without a complex Energy Management System (EMS).
FAQ
Is Yellow Grid Compatible with My Electric Boiler?
Yellow Grid is compatible with virtually all common types of electric boilers. If you are unsure whether your boiler is suitable, contact us and we will be happy to advise you.
Do I Need to Have a Spot Electricity Tariff?
No. We are looking for two groups of users for the pilot testing programme – households using spot electricity prices and households with a solar PV system whose boiler is not yet automatically controlled according to solar PV generation.
How Does Yellow Grid Work with a Solar PV System?
Yellow Grid uses a forecast of your solar PV generation based on weather forecasts and expected solar irradiance. It then automatically schedules water heating primarily for periods when your own electricity generation is expected.
Do I Need an Electrician for the Installation?
If your boiler is connected using a standard mains plug, the Yellow Grid unit is simply installed between the electrical outlet and the boiler. If your boiler has a fixed electrical connection, the installation must be carried out by a qualified electrician.
What If There Is Not Enough Hot Water?
Yellow Grid monitors the water temperature and continuously learns your household's hot water consumption patterns. The aim is to reduce electricity costs or make better use of your own solar PV generation without compromising your normal hot water comfort.
How Does Yellow Grid Connect to the Internet?
Depending on the selected device version, Yellow Grid connects via Wi-Fi, Ethernet or LTE. The Internet connection is used to communicate with the Yellow Grid cloud platform and automatically receive water heating schedules.
How Much Does It Cost to Take Part in the Pilot Testing Programme?
As part of the pilot programme, we offer the devices at special introductory prices:
YG Heat 2KZ (LAN/Wi-Fi): CZK 2,000 including VAT and installation
YG Heat 1HZ (LTE): CZK 3,000 including VAT and installation
What Is Expected of Me as a Tester?
Simply use Yellow Grid as you normally would. You do not need to keep any records or regularly complete questionnaires. As this is a pilot programme, we ask for some understanding while the solution is being tested and will appreciate any feedback you may have about your experience.
Can I Keep the Device After the Pilot Testing Programme?
Yes. The Yellow Grid device remains yours after the pilot testing programme ends.