近年來，在全球能源轉型與淨零排放政策推動下，再生能源占比持續提升，電力系統亦面臨再生能源間歇性發電及夜間尖峰負載增加之挑戰。為提升電網韌性與供電穩定，政府除推動電網強韌計畫外，亦鼓勵企業於用戶端建置表後儲能系統，透過削峰填谷及能源管理系統協助調節電網負載，降低跳電及停電風險。理論上，表後儲能可透過尖離峰電價差為企業創造套利效益。然而，目前台灣企業實際導入案例仍相對有限，顯示投資誘因與企業實際投入之間可能存在落差。
本研究目的在於探討台灣表後儲能套利所面臨之制度障礙，並以已實際導入太陽光電及表後儲能系統之A公司為研究個案，分析企業在台灣現行制度環境下之導入動機、實際運作情形及投資效益。研究期間以A公司2024年至2025年導入表後儲能系統之規劃與建置歷程為觀察範圍，採單一個案研究法，並透過半結構式訪談蒐集個案資料，輔以PESTEL分析架構，從政治、經濟、社會、科技、環境及法律等面向進行綜合分析。
研究結果顯示，A公司導入表後儲能之主要考量，除節費效益外，亦包括配合綠電自用、能源管理及企業永續發展需求。然而，實際運作後，表後儲能系統尚未穩定上線，企業亦尚未建立完整之能源管理系統監控與效益驗證機制，使節費成果及投資報酬難以量化。進一步分析發現，現行時間電價雖具一定尖離峰價差，但與企業實際負載型態仍存在差異，加上補助制度認知不足、收益來源較為單一、市場參與空間有限及法遵成本偏高，均影響企業整體投資意願與財務可行性。
綜合而言，本研究認為台灣表後儲能已具備政策推動基礎與企業實際需求，然在現行制度配套、市場參與機制及技術整合條件尚未成熟之前，企業仍難以僅依賴表後儲能形成具吸引力且可預期之投資模式。研究結果可提供政府未來規劃儲能政策及企業評估表後儲能投資之參考。

This study aims to explore the institutional barriers to BTM energy storage arbitrage in Taiwan through a case study of Company A, a Taiwanese manufacturing firm that has implemented solar power and BTM energy storage systems. The study focuses on the company’s implementation process from 2024 to 2025. A single case study approach and semi-structured interviews were adopted, supported by the PESTEL framework.
The findings indicate that Company A introduced BTM energy storage not only for cost reduction, but also to improve green energy utilization and energy management. However, the system has not yet reached stable operation, and the lack of a complete Energy Management System (EMS) makes it difficult to verify actual cost savings and return on investment. The results further suggest that limited pricing incentives, insufficient subsidy accessibility, restricted market participation, and compliance costs remain key institutional barriers.
This study concludes that although Taiwan has established the policy foundation for BTM energy storage development, current institutional and market conditions are not yet mature enough to support stable and attractive investment returns for enterprises.

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