There is another item in the industrial bill that is as critical as kWh: instant power demand (kW). If the contractual power agreed with the distribution company is exceeded within the month, an additional cost will occur in the power excess fee or power fee tariff. When not considered together with reactive penalties, annual losses of hundreds of thousands of lira may result. OSOS's 15-minute or hourly profile is the essential tool to see peak load before you are billed.
How to choose contract power (kW)?
Contract power is the reference value of demand price and power excess calculation; It is different from the installed power (transformer capacity). In a typical industrial facility, contract power is requested in the range of 60–80% of the installed capacity — choosing too low creates a risk of exceedance, choosing too high creates a fixed power charge burden. For the right choice, at least 12 months OSOS demand profile and seasonal peak analysis should be made.
OSOS / counter
measurement source
15 min demand typical
Max demand
decision variable
Monthly peak kW
Reactive punishment
Associated risk
Same contract strength
Power exceedance penalty — EMRA framework
Within the scope of EMRA tariff and implementation regulations, a power excess fee is applied for demand exceeding the contract power. The calculation logic is summarized as follows: exceeded kW × unit power cost × relevant period coefficients. Board Decision No. 13922 and current tariff communiqués determine unit prices; There may be differences depending on the distribution region. Our guide to Reactive Energy and Reactive Charge emphasizes that contract power is the same reference as reactive limits — follow the two items together.
| Period | Contract (kW) | Max demand (kW) | Overshoot (kW) | note |
|---|---|---|---|---|
| January 2026 | 800 | 742 | 0 | safe margin |
| February 2026 | 800 | 818 | 18 | Slight excess — cost |
| March 2026 | 800 | 950 | 150 | Critical — shift/capacity |
| April 2026 | 850 | 831 | 0 | After contract revision |
Peak watches and peak clipping
In industrial tariffs, odd, double or triple time zones (points) are applied; During daytime peak hours, both kWh unit price and demand density are high. Peak shaving: In short-term high demand moments, the peak is smoothed with the generator, battery or process delay. The permanent solution is to reduce simultaneous engine/compressor starts at peak times through shift shifting, line parallelization and equipment staggered starts.
Örnek OSOS profili — anonim sanayi tesisi (yuvarlatılmış)
Peak analysis from OSOS profile
As explained in our Energy Use Measurement in Industry guide, OSOS 15-minute resolution shows the demand peak moment on a day/hour basis. Monthly maximum demand is not just a number; Which line, which shift and which equipment start combination forms the peak should be combined with the sub-counter and production ERP data.
- Last 12 months hourly/daily demand heat map
- List of peak hours in peak hours
- 5–10% margin target on contract strength
- Excess history and TL impact (invoice verification)
- Same period correlation with reactive rate
ENOPTIMAL: hourly consumption and demand monitoring
ENOPTIMAL consumption management module provides hourly consumption, demand forecast and contract power exceedance warnings on a single screen with OSOS integration. In multi-facility buildings, peak load ranking accelerates energy purchasing and contract revision decisions.
Conclusion
Contractual power is not “sign once and forget”; Production increase, new line commissioning and seasonal cooling load change the profile. With OSOS, monthly demand monitoring, peak trimming during peak hours and contract revision when necessary keep the power excess cost under control. You can request demand maturity analysis specific to your facility with the demo.