Heat your home in the cheapest hours
On a dynamic tariff the price of electricity changes through the day. A heat store lets you make heat when power is cheap and use it when it is expensive.
How dynamic tariffs work
Prices follow the wholesale electricity market and change hour by hour. They are often lowest at night, around midday on sunny days, and when wind output is high.
Next-day prices are usually published the afternoon before, so a controller can plan when to charge.
Without storage, your heating has to run whenever the house needs heat. With storage, heat can be made in the cheap hours.
What Batbubble is designed to consider
Planned capability. Predictive optimisation and dynamic-tariff integration are not yet commercially available in Batbubble.
Tariffs in your country
What households can use today. Check your supplier for current terms.
| Country | What is available | What it means for heat storage |
|---|---|---|
| Germany | Since 1 January 2025, every electricity supplier must offer a dynamic tariff to customers with a smart meter (§41a EnWG). | Smart-meter homes can choose hourly prices and shift heating into cheap hours. |
| United Kingdom | Time-of-use and half-hourly tariffs, including heat-pump tariffs with cheaper windows during the day and night (for example Octopus Cosy). | Heat made in the cheap windows can be used later. |
| Netherlands | Dynamic contracts are widely offered. Net metering for solar ends on 1 January 2027. | Surplus solar and cheap hours both become worth storing. |
| Latvia and the Baltics | Suppliers offer exchange-price contracts based on hourly Nord Pool prices. | Heat can be made in the lowest-price hours. |
Questions about tariffs
What is a dynamic electricity tariff?
A tariff where the price changes through the day, often hour by hour, following the wholesale market. Prices for the next day are usually known in advance.
Does Batbubble work without a dynamic tariff?
Yes. It is designed to store surplus solar on any tariff. A dynamic or time-of-use tariff adds the option of charging in cheap hours.
Is price-based charging available now?
Not yet. It is a planned capability that depends on the final control platform and completed product development.
Be among the first to get Batbubble.
Batbubble is in development. Join the waiting list for development and availability updates. It is not a purchase or reservation.