New paper evaluates how combining batteries and hydrogen storage can boost autonomy and cut energy costs
A new scientific publication by researchers from CERTH (Centre for Research and Technology Hellas), a key partner of the REN+HOMES project, investigates how to combine different storage technologies to reduce grid consumption while keeping costs under control.
The study, published in the International Journal of Hydrogen Energy, focuses on a 1,000 m² building powered by solar panels and equipped with a hybrid storage system that brings together lead-acid batteries and a hydrogen tank with metal hydrides. Using dynamic simulations, the researchers identified the optimal setup to maximise energy autonomy and cost efficiency.
The findings are striking: with 118 batteries and a compact 4 kg hydrogen tank, the building can cover more than 99% of its energy needs without relying on the grid. By contrast, larger photovoltaic systems can achieve similar autonomy but at almost double the cost, due to the much greater hydrogen storage they require.
This research shows how smart integration of different technologies can make buildings more sustainable, independent, and affordable.
Cover photo credits: Hossein Nasr on Unsplash