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Economic Viability of PV-BESS Systems under Time-of-Use Pricing and Price Caps: A Multi-Location Study in Vietnam
One-line summary
A solar energy research paper on Economic Viability of PV-BESS Systems under Time-of-Use Pricing and Price Caps: A Multi-Location Study in Vietnam.
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Chinese explanation / 中文解读
中文解读待补充：本站会优先为光伏效率、钙钛矿太阳能电池、储能技术、太阳能热利用、BIPV、并网技术等高价值论文补充中文说明。
Original abstract
Utility-scale photovoltaic (PV) systems are increasingly integrated with battery energy storage systems (BESS) to mitigate curtailment and enhance renewable energy integration. However, the economic viability of photovoltaic-battery energy storage systems (PV-BESS) remains highly uncertain under current electricity pricing mechanisms, particularly in power systems characterized by transmission constraints and regulated price caps. This study develops an integrated techno-economic framework to evaluate the performance of PV-BESS systems under time-of-use (TOU) pricing. The framework combines PV generation and curtailment modeling, rule-based BESS dispatch, and financial evaluation to capture the interactions between system operation, pricing structures, and investment outcomes. The analysis is applied to three representative utility-scale PV plants in Vietnam, capturing variations in solar resource conditions and transmission congestion levels. The results show that transmission constraints strongly affect economic performance, significantly widening the financial viability gap as congestion increases. While TOU pricing improves temporal price signals, it remains insufficient to ensure investment viability under regulated price caps. Notably, stronger TOU price differentials may reduce total revenue under capped peak prices, thereby increasing the required capacity-based compensation. These findings highlight structural limitations of energy-based pricing mechanisms in supporting storage deployment in constrained power systems. Additional compensation mechanisms, such as capacity payments, are required to enable economically sustainable PV-BESS deployment and enhance renewable energy integration.
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