Why it matters
Optimal energy management requires balancing consumption, production, and supply data in the same model; PTF is the main reference price on the supply side. After hourly netting, GES investors face a spread between low midday PTF and high evening retail prices — load profile and production matching determine the financial outcome. PTF volatility during bilateral agreement renewal periods creates budget variance; portfolio-level hourly PTF margin tracking has become standard operation. BESS and shift optimisation decisions rely on the PTF series. As the core input of the active energy component in the SKTT formula, PTF directly sets unit price for subscribers moving from national tariff to market. The hourly price formed in the EPİAŞ day-ahead market is used as index or spot reference in supply contracts.
Impact on the bill
On free consumer invoices, active energy charge is calculated according to PTF and contract terms. It is a direct component of unit price under SKTT. Hourly PTF determines the cost of consumption during time-of-use periods; load shifting and demand management affect invoice items. In invoice reconciliation, invoice lines should be cross-checked against PTF reference values. Low PTF when GES surplus is fed to the grid, and high retail tariff when purchasing during evening peaks, indirectly affect total invoice.
How ENOPTIMAL tracks it
The ENOPTIMAL supply management module offers PTF price integration, forecasting, and portfolio cost analysis. The production module compares netting scenarios on hourly PTF using inverter data and OSOS consumption. Multi-site PTF impact ranking is available in the free consumer portfolio. In the electricity invoice tracking module, the PTF item is verified against invoice lines; unit price deviation reports are produced. Before supply contract renewal, cost scenarios can be modelled by matching the hourly PTF series with the consumption profile.