Solar articles & technical guides

Everything we learn in the field, written plainly. Legislation, costs, yields and real numbers from installations we deliver across Attica and all of Greece.

Net Billing solar system on a roof
Featured Legislation · 8 min read

Net Billing 2026: how credit offsetting works and what changes for you

Value-based energy offsetting explained step by step: what a settlement cycle means, how surplus energy is valued, why self-consumption is worth double, and what system size makes sense today.

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Recent articles

Solar system on a commercial building roof
Cost & payback

Solar for businesses: up to 30% cheaper energy

What the energy minister said about the new ministerial decision and where the saving actually comes from for a business.

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Residential solar panels on a tiled roof in Athens
Legislation

Greece’s new self-consumption framework: what changes for solar

Balcony solar up to 800 W, batteries without panels and a dedicated route for municipalities – what applies and from when.

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Aerial view of a solar park connected to the grid
Grid

New grid capacity for solar: 725 MVA from DEDDIE

Fourteen substations of 150/20 kV reinforced and fresh headroom for solar and storage connections – what applies in each area.

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Solar panel installation on a flat roof
Cost & payback

What does a solar system cost in Athens in 2026?

Real price ranges per kWp for residential and commercial systems, what a serious quotation includes, and where the hidden costs lurk.

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Lithium energy storage battery
Storage

How big a solar battery do you actually need?

The sizing rule we use, why a bigger battery is not always the right one, and how it changes the payback.

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Technician measuring the grid connection voltage of a solar system
Permitting

Saturated grid: solar connection refused? What to do

Why connection applications are blocked in many areas, and which zero-export solutions remain viable.

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Technician cleaning solar panels
Maintenance

Solar panel cleaning and maintenance: the real impact

How much output a dirty panel loses in Attica, what we check at an annual service, and which warning signs you should never ignore.

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Solar panels on a residential tiled roof
Installation

Flat roof or tiled roof? What changes in performance

Tilt, orientation, mounting, structural capacity and aesthetics — the real differences between the two roof types.

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