BASTET system validation phase
In the current phase of the project, we are focusing on comparing the real operating costs of heating with different energy sources. The goal is not a model calculation, but the closest possible approximation of actual operation in a real house.
BASTET is a unique, patented thermal energy storage system with an integrated heat exchanger for space heating and domestic hot water (DHW). It is designed as a universal solution suitable for all types of family houses.
How we calculate costs for the BASTET system
Unlike conventional heat sources, the costs of the BASTET system cannot be determined simply by multiplying consumption by the price of energy. The calculation is based on real operating conditions, specifically:
- Daily solar yield of the photovoltaic (PV) plant, which directly affects the amount of energy available to cover part of the house’s heat demand
- Charging the thermal storage during periods of low spot electricity prices, within 15-minute intervals
- A combination of own generation and purchasing electricity in the most favourable time windows
This approach makes it possible to minimise operating costs without compromising the thermal comfort of the building.
Why we compare real data
The aim of this phase is not to present the maximum possible savings, but to verify how the system behaves in real operation. We monitor:
- the system’s ability to store energy during periods of surplus,
- how efficiently low spot prices are used,
- the stability of heat supply under changing conditions.
The results of the comparison serve as the basis for further optimisation of the system control and a more accurate prediction of operating costs.
Once this phase is complete, it will be possible to transparently compare the real costs of the BASTET system with conventional heating methods, such as electricity or gas, and to support the results with real operating data.
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