Self-Consumption - Synchronous Energy Balancing - Net Billing
Get Your Energy Independence
The new energy landscape is here. With Self-Consumption / Net Billing, your roof becomes your own power station, for generating energy, savings, and profit.
Energy Has Changed the Rules, and It's Time for You to Win the Game.
Our relationship with electricity used to be a one-way street: we consume, we pay. The old model of Net Metering was the first step toward change, but the revolution is happening now. Self-Consumption, also known as Synchronized Offsetting (Net Billing) is not just an evolution. It's a twist that puts you in the driver's seat.
At KOSMOS ENERGEIA we don't just sell you panels. We deliver the keys to your energy autonomy.
How Self-Consumption or Synchronized Offsetting (Net Billing) Works: The Two Pillars of Your Benefit
Your system provides two main benefits.
Pillar 1: Direct Self-Consumption (The "Defensive" Pillar)
Every sunbeam converted into electricity and used directly by your home or business appliances is a shield against rising costs. It's energy you produce, for yourself, with zero operating cost, causing the daily energy charges on your bill to disappear.
Pillar 2: Selling Surplus Energy (The "Offensive" Pillar)
The surplus energy is no longer credited to your account for later use. It is fed into the grid and converted into direct revenue. Your system no longer just saves you money; it generates additional income.
The Secret Weapon: The Storage Battery
If Self-Consumption / Net Billing is the revolution, the battery is what solidifies it. Adding storage transforms an excellent system into the ultimate tool for control.
✔ Energy Vault: Store the surplus, free, clean energy generated during the day.
✔ Night Shield: Use that stored energy at night, when grid prices are higher.
✔ Security: Ensure uninterrupted operation even during power outages.
With a battery, you set the rules.
What is Self-Consumption or Synchronous Balancing (Net Billing)?
Synchronous Balancing is a modern scheme for offsetting energy from photovoltaics, where the electricity you produce and do not consume is injected into the grid, and you are compensated for it financially, either based on the wholesale price or at a fixed rate.
Key features:
✔ Synchronous balancing of production-consumption: what you produce and use simultaneously is automatically offset.
✔ The surplus energy injected into the grid is sold.
✔ It applies to residential, commercial consumers, farmers, and energy communities.
It is possible to have multiple electricity meters, under the same owner, where one or some of them generate electricity that is offset against the consumption of all the meters. This is known as Virtual Synchronous Balancing.
How does it differ from the previous Energy Balancing (Net Metering)?
✔ In Energy Balancing (Net Metering), the surplus energy was transferred to the grid and calculated as a reserve or credit in kilowatt-hours (e.g., 15 kWh today = 15 kWh in the future), and there was no calculation in euros.
✔ In Synchronous Balancing or Self-Consumption (Net Billing), the excess energy is paid out in money on the next bill.
✔ Therefore, consumers with evening consumption are encouraged to install energy storage units (batteries) to take advantage of their daily production.
Which Energy Path is Right for You?
The new framework offers flexibility. KOSMOS ENERGEIA is the specialized guide that will help you choose the path that perfectly matches your own map of needs.
| Program | Who Is It Ideal For? | How It Works in Simple Terms |
| Net Billing (without a Battery) | Households & Businesses / Professionals. The new, standard option for everyone. | You produce, you consume, and whatever is left over you sell to the grid at a guaranteed reference price. Ideal for daytime consumption (air conditioning, refrigerators, etc.). |
| Net Billing (with a Battery) | For Households and Businesses / Professionals. | For Net Billing with a battery, a state subsidy is available only for professionals / businesses. It's the ultimate solution for maximum autonomy at the lowest possible investment cost. |
| Virtual Net Metering (Virtual Balancing) | Businesses with multiple facilities (e.g., factories, offices & warehouses), Farmers, and Energy Communities. | You generate electricity at one location (e.g., in a field) and offset the production against the consumption of multiple electricity meters in different spaces and regions. |
Our team will analyze your profile and propose the most financially and technically optimal solution.
Legal & Regulatory Framework
✔ The Ministerial Decision and the Government Gazette (ΥΠΕΝ/ΔΑΠΕΕΚ/93976/2772, ΦΕΚ Β’ 5074/05.09.2024) establish the framework for installations up to 10.8 kWp for residential users, effective from July-September 2024.
✔ HEDNO (Hellenic Electricity Distribution Network Operator) is responsible for handling applications, connections, measurements, and meter changes.
✔ Virtual synchronous balancing / virtual net-billing allows for offsetting even if the photovoltaic system and the consumption point(s) are located at different facilities.
Financial Compensation & Taxation
✔ The fixed tariff is calculated at €0.05 to €0.07/kilowatt-hour (kWh), or you are paid at the wholesale price as determined by the Hellenic Energy Exchange. The first option is advantageous without a battery, while the second is better if a battery is present.
✔ The surplus energy is compensated for a period of up to 20 years.
✔ Revenue from the system is not taxed for residential consumers – it is not considered professional income.
Advantages
✔ Continuous real-time balancing reduces bill expenses.
✔ The investment payback is accelerated as energy is sold during hours with the highest prices.
✔ Virtual Synchronous Balancing provides installation flexibility – for an individual property or an apartment building (with 51% consent).
✔ Energy storage (batteries) increases benefits due to the price difference between day and night.
Disadvantages & Challenges
✔ Compensation at the wholesale price requires monitoring.
✔ Without storage, a proper study of loads and consumption periods is required.
✔ A technical system for measurement and control is necessary, along with compliance with HEDNO's technical specifications.
Best Practices
✔ Install batteries to store the midday surplus and use it later if there are evening loads.
✔ Shift the use of loads (e.g., washing machine, auxiliary devices, irrigation, electric motors) to hours with high sunshine.
✔ For businesses with nighttime or winter demand, storage becomes almost essential.
✔ Businesses with multiple meters can implement Virtual Synchronous Balancing.
From Plan to Plug: The 4-Step Process of KOSMOS ENERGEIA.
We handle the complexity, so you can enjoy the simplicity.
- Strategic Planning: No "one-size-fits-all" solutions. We listen to your goals, analyze your space and loads, and design a system as an investment, not just an installation.
- Full Paperwork Handling: Bureaucracy is our responsibility. We handle the applications to HEDNO, the contract with the Aggregator (the entity for selling the energy), and every required approval.
- Precision Installation: Our certified technicians install equipment from top-tier, tested companies with an obsession for safety, aesthetics, and long-term performance.
- Activation & Monitoring: We deliver a fully operational system and train you on the monitoring applications, so you can watch your investment pay off in real time.
In Summary
Synchronous Balancing / Self-consumption / Net Billing in Greece is currently the most complete scheme for self-generation and self-consumption. It is ideal for households and businesses with high electricity consumption, especially when combined with energy storage. For daytime and summer consumption, it is the only way to go.
The Next Day in Energy Starts on Your Own Roof.
Waiting costs, action pays off. Take the step that will change your relationship with energy forever.
For more information about the energy saving potential of your facility, you can call us at (+30)2310446900 or fill out the form below.