Why it matters
SKTT is not a "high consumption penalty" — it is the mechanism for moving to market cost. In 2026, lowering the residential limit from 5,000 kWh to 4,000 kWh affects a wider subscriber base; light industry and SMEs at the industrial and commercial 15,000 kWh threshold can quickly exceed the limit. When limit exceedance is detected and there is no bilateral agreement, SKTT applies from the first day of the third month following the exceedance month. Bilateral agreements, OSOS-based consumption optimisation, and net draw management with GES keep SKTT risk under control. Free consumer status alone does not protect from SKTT; a strategy of bilateral agreement or staying below the limit is required.
Impact on the bill
SKTT unit price differs from national tariff; it is directly linked to PTF and YEKDEM market cost. Formula (PTF + YEKDEM) × KBK — PTF changes hourly, YEKDEM is announced monthly, KBK is the multiplier including distribution and other components. When the limit is exceeded, invoice items are calculated with market components instead of national tariff; annual energy cost difference can reach hundreds of thousands of lira. SKTT status per connection should be queried from the distribution company. Reactive penalty and power excess items must also be managed separately during SKTT; focusing only on active energy understates total cost.
How ENOPTIMAL tracks it
The ENOPTIMAL SKTT limit check tool compares annual consumption against 2026 thresholds: residential 4,000 kWh, industrial and commercial 15,000 kWh. The consumption management module supports supply decisions with OSOS hourly profile, invoice reconciliation, and reactive alerts. Multi-site SKTT risk and bilateral agreement scenarios can be modelled in the demo environment for free consumer portfolios. Limit status should be verified with the distribution company; the platform provides consumption trend as early warning.