A research project for secondary school students involving both physical measurements and modelling
is presented. The problem to be solved is whether and how a typical house can be supplied with
energy off-grid, based entirely on renewable energy sources, more specifically, on solar and wind
energy, while using relatively simple devices, namely, photovoltaic modules, wind turbines and
accumulators. To this end our students carried out a long term measurement series in order to assess
the typical energy consumption of houses. Further, the number of solar modules and wind turbines,
and the necessary accumulator capacity, was estimated.