Navigating the CTBCM Transition: Use of System Charges and Battery Energy Storage as Determinants of Industrial Decarbonization Viability in Pakistan
Analyzes Pakistan's proposed uniform Use of System Charge and mandatory Battery Energy Storage System requirements under CTBCM, finding that competitively procured renewable electricity stays viable against the B-4 industrial tariff up to a bilateral energy price of about Rs. 15/kWh, while BESS co-location typically pays back in 5-8 years.
Summary
This ADS policy brief examines two commercial-design issues shaping the early implementation of Pakistan's Competitive Trading Bilateral Contract Market (CTBCM): the proposed uniform Use of System Charge (UoSC) and the mandatory Battery Energy Storage System (BESS) requirement for variable renewable energy projects. It finds that the current UoSC of Rs. 6.69/kWh plus a Rs. 3.23/kWh Debt Service Surcharge creates an effective wheeling floor of Rs. 9.92/kWh, leaving industrial consumers meaningful savings against the roughly Rs. 26.46/kWh B-4 tariff for bilateral energy prices up to about Rs. 15/kWh. It also reviews ISMO's post-consultation decision to require BESS capacity equal to 10% of plant nameplate with a two-hour discharge duration, modelling typical payback periods of 5-8 years.
Key Points
- 1The proposed UoSC of Rs. 6.69/kWh plus a Debt Service Surcharge of Rs. 3.23/kWh creates an effective wheeling floor of Rs. 9.92/kWh before any bilateral energy price is added.
- 2Against a blended FESCO B-4 industrial tariff of about Rs. 26.46/kWh, CTBCM remains commercially competitive for bilateral energy prices between Rs. 8 and Rs. 15/kWh, with the effective breakeven at approximately Rs. 15.04/kWh.
- 3ISMO's post-consultation rule requires renewable energy projects to install Battery Energy Storage System (BESS) capacity equal to at least 10% of plant nameplate rating, with a minimum two-hour discharge duration.
- 4Modelled BESS investments meeting this minimum requirement typically achieve simple payback periods of 5 to 8 years, well within a typical 20-year project lifetime.
- 5In April 2026, Pakistan's System Marginal Price (SMP) reached Rs. 94/kWh in a single hour, illustrating an uncapped balancing-market risk that CTBCM participants face separately from the wheeling charge.