Over the past few decades, grid-connected photovoltaic systems (GCPVSs) have been consistently installed due to their techno-socio-economic-environmental advantages. As an effective solution, this technology can shave air conditioning-based peak loads on summer days at noon in hot areas. This paper assesses the effect of solely rooftop GCPVS installations on the peak load shaving of commercial buildings in arid regions, e.g., the Middle East and North Africa. To this end, the load profile of a large building with 470 kW of unshaved peak power in Mashhad, Iran (36.2972° N, 59.6067° E) is analyzed after commissioning an actual 51 kW GCPVS. The results of this experimental study, exploiting 15 min resolution data over a year, endorse an effective peak shaving of the GCPVS without employing a battery energy storage system, with 12.2–18.5% peak power shaving on a summer day at noon. The monthly GCPVS self-sufficiency is also 10.2%, on average. In accordance with the studied case’s results, this paper presents valuable insights and recommends actionable policies to regions with similar solar potential and electricity supply challenges, aiming to expedite GCPVS development.

In recent years, grid-connected photovoltaic system (GCPVS) has been installed at a steady pace around the world due to its clean energy generation, simple operation, and low maintenance. This technology is also a convenient solution for peak shaving in residential and commercial buildings of arid areas with great air conditioning demand in the summer noon. Several supportive policies have been accordingly legalized by countries/regions to attract private and government-based stakeholders. This paper proposes a techno-economic assessment of GCPVS in arid areas from the peak shaving perspective. As a practical case, the effect of a commissioned 102 kW GCPVS on peak shaving of the Mashhad waste management organization building is assessed, exploiting high-resolution one-year recorded data. The results endorse that installed GCPVS shaves the peak demand of this commercial building in summer noon by 40–50% on average. An economic evaluation is also conducted; the outputs highlighted that this project is economically viable with a 43,671 € net present value (NPV) and 34.5% internal rate of return (IRR). It is finally recommended that such practical and reliable studies with a large range of applications provide valuable insights and recommendations to the policymakers to adopt a well-modified policy according to the local economic and solar potential.