Tools and guides for your energy decisions
Clear information, calculators and guides on bills, tariffs and energy investments. This is a personal information resource and not the official website of my employer.
Tariff and pricing concepts
Plain-language explanations of fixed versus indexed (PTF) pricing, the last-resort tariff (SKTT) and tariff types.
- Fixed versus indexed pricing
- Single/dual-term and multi-time tariffs
- What to look for in a contract
Reading and checking your bill
A guide and a calculator so you can understand each line on your bill and check it yourself.
- Line-by-line bill guide
- How reactive power and demand-charge fees work
- Cross-checking with the bill calculator
Market indicators
Articles on how indicators such as PTF and YEKDEM are formed and how to read them; current values are on the Bulletin page.
- How PTF forms and why it changes hourly
- How YEKDEM is calculated and reaches the bill
- Official data sources: EPİAŞ and EPDK
I-REC / YEK-G guide
An informational guide to what renewable energy certificates (I-REC / YEK-G) are and how they work.
- What a certificate is for
- I-REC versus YEK-G
- Process and key concepts
Electricity saving guide
Practical saving steps and an estimated-savings calculator for homes, businesses and factories.
- Separate guides for homes, businesses and industry
- No-cost quick wins and investment ideas
- Interactive savings estimator
How can you use this site?
Learn the basic concepts with the bill, tariff and market articles.
Enter your own figures in the calculators and see the result.
Put scenarios side by side and see where the difference comes from.
Confirm current values with official sources such as EPDK and EPİAŞ.
Frequently asked questions
Are these tools and articles free?
Yes. Every calculator, guide and article on this site is free. The site does not offer any paid service, consulting or sales.
Is this the official website of an organization?
No. This is a personal information resource; it is not the official website or publication of my employer and has no sales or marketing purpose. It only offers informational tools built on EPDK tariffs and publicly available data.
Who are these tools for?
Everyone, including residential, business and industrial customers. The bill calculator, solar (GES) simulator and EV guide are open to all; results are informational.
How is my information used?
The calculators run entirely in your browser and nothing you enter is sent to a server. If you submit the contact form, what you write is used only to reply to you; details are in the Privacy policy.
Spotted a mistake or something missing?
If you notice wrong or outdated information, let me know through the contact form and I will check and correct it.