WodaTherm™ SD-IHC · SKU WTH-SD-IHC

Give your water heater and electric heating an intelligent upgrade — and cut your energy bills.

Ready to make your home smarter and spend less on heating? WodaTherm™ AI SD-IHC helps you put surplus solar energy, cheaper off-peak electricity and intelligent energy management to work. Whether you are buying a water heater or upgrading the heating elements in your electric or storage heating, this compact controller gives you control over when they run, where their energy comes from and how much power they use. Connect your heating to Shelly Smart Control and your home's solar or energy-management system, set your priorities and let the automation take care of the routine.

How much could you save?

Take 2,000 kWh of usable surplus solar electricity a year. With peak electricity at CZK 6/kWh, off-peak electricity at CZK 3/kWh and an export payment of CZK 0.50/kWh, the savings work out as follows.

Smart heating should do more than follow a timer. Control it around your solar surplus, electricity prices and preferred heating power. Use the Shelly app for hands-on control, or connect it to a wider energy-management system that uses AI.

Pay for control you will actually use. We bring the smart features to a basic water heater.

Smart control for the equipment you already own

Why pay a premium for a “smart” water heater when its smart features often stop at scheduled heating? WodaTherm™ AI SD-IHC brings together control based on solar surplus, electricity prices, time and power. It works with water heaters with mechanical thermostats, electric heating elements, the heating elements in storage heaters, heating coils and radiant heaters with the corresponding resistive element. Our device lets you add intelligent control for a fraction of the price of an expensive “smart” water heater.

The same approach gives you more control over electric and storage heating elements: match heating to the energy you have, the electricity price and your daily routine, with the Shelly app always within reach.

With this device, you can:

1. Automate when your heating runs. Set the rules around your household's needs. Your automation can decide when to start, adjust power as conditions change and stop heating according to your chosen routine.
2. Heat using surplus solar only. With the corresponding metering and energy management in place, make surplus PV electricity your chosen source of heat. The system follows the available power and adjusts the heating load, turning electricity from your roof into hot water or stored warmth.
3. Choose the electricity price you are willing to pay. Heat at cheaper overnight rates or during other low-price periods. When hot water is the priority, you can also allow heating at higher prices. Your automation uses your tariff or an electricity-price data source to make those choices.
4. Take control from your phone. Use Shelly Smart Control on your phone, tablet or computer whenever you want to adjust the heating yourself. Remote access through your Shelly account gives you control while you are away.
5. Set the times that suit your household. Choose heating windows by hour and day: while your solar panels are generating, during off-peak periods or ahead of your usual hot-water demand. Combine schedules with your other automation rules.
6. Choose heating power and speed. Use a smaller amount of available power for a slower heat-up, or increase power when you want heat sooner. Set power levels, switching thresholds and priorities for your control system to follow.

Choose the combination that suits your installation. Automatic regulation brings together metering, the relevant data and the configured control system.

Buy a simple water heater. We supply the smart control.

Buying a new water heater? Choose an affordable, straightforward model with the corresponding resistive heating element. WodaTherm™ AI SD-IHC supplies the intelligent control through your configured automation. Save the premium charged for digital or “smart” controls that often do little more than switch the heating on and off at set times.

Against a “smart” water heater costing CZK 30,000 or more, compare the price of a basic heater, our controller at CZK 8,898 including VAT, and installation. After the controller alone, at least CZK 21,102 remains from that comparison budget for the heater and installation. With the right choice of components, the upfront saving can reach CZK 10,000. Add potential annual savings of up to CZK 11,000, as shown in the table.

Keep more of the value of your solar energy

Use electricity from your own panels to replace part of the energy you would otherwise buy for heating. An annual saving of CZK 8,000–12,000 corresponds to using 2,000–3,000 kWh of surplus energy at a net benefit of CZK 4/kWh. That net benefit accounts for the avoided electricity purchase and the export payment you give up. Your generation, usable surplus, electricity prices and demand for heat determine the saving for your home.

The Shelly app, solar automation and AI energy management

Start with manual control in the app, use heating schedules or make your heating part of your home's energy management. A connected supervisory system can also use AI to decide how and when to heat. SD-IHC turns that system's heating request into power for the heating element, using the configured combination of devices, metering and data.

Open Shelly Smart Control

One controller. Your priorities.

Prepare hot water in your chosen morning window. During the day, follow surplus solar generation and adjust heating as other appliances switch on. In the evening, choose your own settings in the app. Your system's configuration determines which rules take priority, giving you heating that fits the way you live.

The compact enclosure has a mains plug on one side and an output socket on the other. It brings simple heating equipment into your home's smart energy system.

Model: SD-IHC. SKU: WTH-SD-IHC.