Net Metering or Net Billing in 2026? What applies today

September 2026 Update: for new self-consumption applications, the main framework we are considering is net billing and, where applicable, virtual net billing. The old net metering should not be presented as the general new model for every new installation.

What is Net Billing

The energy produced is first used to cover the loads of the installation. The excess can, depending on the configuration, be stored or injected into the grid and cleared according to the applicable framework and the relevant contract.

The basic technical principle is that the more production is consumed at the moment it is produced, the less energy the installation needs to buy from the grid.

Net Billing with Battery

DEDDIE (HEDNO) accepts net billing requests with a storage system. The battery can increase self-consumption by transferring part of the production to hours when there is no sun. However, it is not mandatory for every project.

• For a business with high daily consumption, a system without a battery can be technically and economically efficient.
• For a residence with high evening consumption, storage can have greater value.
• For backup, a compatible inverter, battery, and separate design of backup loads are required.

Why the system should not be oversized

More kW does not automatically mean better payback. Proper study considers annual consumption, hours of use, power peaks, available space, shading, battery, and how surplus production will be utilized.

What is needed for a proper study

1. Recent bill or detailed consumption data.
2. Single-phase or three-phase supply.
3. Area and available space.
4. Large loads such as heat pump, EV, motor, or professional equipment.
5. Goal: lower bill, battery, backup, or greater autonomy.

Official information

For technical requirements and connection procedures, we refer to DEDDIE (HEDNO) and the current regulatory framework of the Ministry of Environment and Energy.

Hellenic Energy designs net billing solutions, hybrid and autonomous systems with Victron Energy, Deye, and LiFePO4 Pytes V5 batteries.

☀️ Request a free technical study · ☎ 697 153 7767 · Hellenic Energy App