How Net Billing Works
The process is simple and fully automated. The system measures what you produce and what you consume in real time.
⚡ The Key Difference from Net Metering
With Net Billing, the energy you inject into the grid is valued at the current wholesale market price (MEAD), while the electricity you draw from the grid is charged at the retail rate. Correct system sizing and a battery are the keys to maximising your savings.
with a battery
Who Can Apply?
Residences
- ✅ Houses & apartments
- ✅ Up to 10.8 kWp installed capacity
- ✅ 4–6 year payback period
- ✅ Battery storage option available
Businesses
- ✅ Commercial & professional premises
- ✅ Up to 500 kWp
- ✅ 3–5 year payback period
- ✅ Tax advantages
Industrial
- ✅ Agricultural & industrial installations
- ✅ Large-scale MW installations
- ✅ Virtual Net Billing
- ✅ Bespoke feasibility studies
Application Steps with DEDDIE
Frequently Asked Questions
What is the difference between Net Billing and Net Metering?
With Net Metering, the energy you inject is matched 1:1 against what you consume (in kWh). With Net Billing, surplus energy is sold at the wholesale market price, which is lower than the retail rate. Since 2023, all new photovoltaic installations fall under Net Billing.
How long does the DEDDIE connection process take?
Typically 1–3 months for residential installations up to 10 kWp. For larger commercial systems, the process can take 3–6 months. Ηλιάτορας Φωτοβολταϊκά Α.Ε. manages all administrative steps, significantly reducing lead times.
What happens to surplus energy under Net Billing?
Energy you do not consume is automatically injected into the grid and sold at the MEAD (Market Energy Avoidance Dispatch) wholesale price. The credit is deducted from your next bill, and any remaining balance is carried forward on a quarterly basis.
Do I need planning permission for a rooftop solar system?
For residential systems up to 10 kWp on a primary residence, no building permit is required — a simple notification suffices. For larger systems or installations on commercial premises, different regulations apply, which our team will walk you through in detail.
Is Net Billing with a battery more cost-effective?
In most cases, yes. A battery raises self-consumption from around 40% to 70–85%, reducing the amount of energy exported at the lower wholesale rate. The financial benefit is particularly significant for households with high night-time electricity consumption.