The concept of Net Zero Energy Buildings (NZEB) or Near Zero Energy Buildings (nZEB) has sparked widespread interest in response to growing energy demands in buildings while lowering carbon footprints in urban settings. Numerous case studies use simulations or data collected to investigate the concept's technological feasibility.

This paper deals with the case of a solar home demonstrator in order to assess its degree of compliance with the nZEB standard. The first stage involves implementing high-efficiency passive and active solutions to reduce energy consumption. The second step includes combining a photovoltaic (PV) system with Battery Energy Storage (BES) and a solar water heater to harness renewable energy sources. The assessment of the nZESHD's energy performance is done through the evaluation of the energy balance, the independence from the electrical grid, and the renewable energy ratio used to fulfill the home's energy needs, all based on data collected over a year.

The results show that the PV system installed in the nZESHD generated 4439.68 kWh/year, while the house's estimated consumption was 3368.95 kWh/year, which led to an annual surplus of 30.58% of the energy production.  The nZESHD exceeded the requirements for a zero-energy house and operated as a positive-energy house. The photovoltaic system provided up to 71.9% of the house's energy consumption, with the remaining 28.10% supplied by the electric grid. The Annual energy performance indicators obtained for nZESHD are a Direct Consumed Ratio (DCR) of 50.76%, a Capacity Fraction (CF) of 73.97%, and a Renewable Energy Ratio (RER) of 160.42%. The findings of this case study provide an in-depth comprehension of the potential to improve the performance of near-zero energy houses in Algeria's specific climate.