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This paper presents a comparative techno-economic study of the net-metering and net-billing self-consumption schemes when applied to industrial and residential consumers that are equipped with a PV system in their premises. Fixed-tilt and single-axis tracking PV mounting systems have been considered, whereas the multiple cost components of the supply and regulated charges have been explicitly modeled and analyzed. Real-life electricity consumption and PV generation data have been used along with detailed wholesale electricity market data derived by an analytical long-term chronological simulation of the Greek wholesale electricity market under hourly time granularity for a 20-year study period (2026-2045) using a specialized integrated market simulation software. Simulation results show that the installation of an on-site PV system can lead to notable annual electricity cost savings for both consumer types and self-consumption schemes. The co-evaluation of the annual cost savings with the project investment and operational costs in the long-term provides further insights into the impact that the adopted self-consumption scheme along with the selected PV mounting system and the capital expenditure may have on standard project valuation indicators for each consumer type.
Simoglou et al. (Sat,) studied this question.