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New · awaiting approval

Balcony solar

Two panels on your balcony railing or wall, a small inverter and, if you like, a battery. Power for a flat with no roof of its own. The new self-consumption framework allows systems of up to 800 W.

Register your interestWork out the benefit
2 panels + inverterup to 800 W indoors
800 Wmaximum power into your home
2panels in a typical installation
≈ 1,000kWh a year, south-facing balcony
1.92–9.6kWh battery, optional
a few hoursto install
Where things stand

The road to the first installations

On 14 September 2026 the Ministry of Environment and Energy announced the new framework for generating energy for your own use, which includes balcony solar of up to 800 W. The process to permit their use is under way.

  1. 14/9/2026Framework announced

    The Ministry announces the new self-consumption framework, with balcony systems of up to 800 W.

  2. NowApproval process

    The technical specifications and the connection method are being set. We are taking registrations of interest.

  3. After approvalFirst installations

    We call everyone who registered, in order of priority, for a site survey and a quote.

Updated: October 2026

How it works

A small system with an immediate benefit

The energy is used the moment it's generated, by whatever is running in your home.

Every home has a “base load” that runs all day: the fridge, the router, appliances on standby, the circulation pump. It's usually 100 to 250 W. A balcony system covers this load during sunny hours, and a bit more when the washing machine or air conditioning is on.

Without a battery, anything not used at that moment goes to the grid. With a small battery, the day's surplus is kept for the evening and self-consumption rises significantly.

Balcony 2 panels on the railing or wall Micro-inverteror all-in-one with battery output up to 800 W DC Flat fridgerouter · devices air condaytime washing use the solarenergy first AC
The panels send direct current to a small inverter, which converts it to alternating current and feeds it into your home's circuit. The appliances running at that moment use it first.
A day in a flat

When it generates, when you use power

At midday the system generates up to 600–700 W, while a flat usually uses 150–350 W. In the evening it's the other way round. That's why a battery makes such a big difference.

20040060080000:0006:0012:0018:0024:00Wbalcony output
OutputUsed immediatelyFlat consumption
Without a battery: the output covers the daytime base load. Any midday surplus goes to the grid.
200400600800from the battery00:0006:0012:0018:0024:00Wbalcony output
OutputUsed immediatelyFrom the batteryFlat consumption
With a battery: the midday surplus covers part of the evening consumption.
Mounting & orientation

What affects the output

Two things matter most: which way the balcony faces and at what tilt the panels are mounted. Shade from nearby buildings, awnings or trees also reduces the output.

Railing, upright≈ 70%Railing, tilted≈ 85%Floor stand, 30°≈ 100%
Indicative annual output compared with the ideal 30° tilt, for a south-facing balcony. Upright mounting loses out in summer but gains in winter, when the sun is low.
S100%SE95%E80%NE60%N50%NW60%W80%SW95%balconyfaces…
Indicative annual output by orientation, compared with south (S). E = east, W = west, N = north.
Calculator

How much your own balcony could save you

Change the options and see the estimate straight away.

Output to the home is capped at 800 W.
—kWh output / year
—kWh you use
—savings / year
used immediatelyfrom the batterygoes to the grid

Indicative calculation: 1,500 kWh per kWp a year in ideal conditions in Attica, typical flat consumption. No payment is counted for the energy that goes to the grid.

Is it for me?

A quick check

It suits you if…

  • you live in a flat without your own roof
  • your balcony faces south, east or west
  • you have appliances that run during the day
  • you want something simple that moves house with you
  • you want backup for essential loads in a power cut (with a battery)

It probably doesn't suit you if…

  • your balcony faces north or is shaded all day
  • you have a house with a roof: a standard solar system delivers far more
  • you already have solar on the same supply
  • your building's rules don't allow changes to its appearance
Products

The balcony systems we'll offer

The final choice will depend on the technical specifications set out in the approval.

GoodWe ESA Athena
With batteryGoodWe

ESA Athena: inverter, battery and energy management in one

A complete system for balconies and small installations. The base unit has a 1.92 kWh battery, and extra units stack on top for more storage.

Output to the home
800 W
Panel inputs
4 MPPT, up to 2,400 W
Battery
1.92 kWh, up to 9.6 kWh
Backup
up to 1,500 W during a power cut
Protection
IP65, automatic fire suppression
Warranty
10 years
Deye micro-inverter
No batteryDeye

Micro-inverter 600–1000 W

The simple option without a battery: two panels connect to a micro-inverter that feeds power into your home's circuit.

Power
600–1000 W (set to 800 W)
Inputs
2 MPPT
Monitoring
Wi-Fi, app
Deye 4-input micro-inverter
No batteryDeye

4-input micro-inverter

For larger balconies or terraces with more panels. The output is set so that it stays within the framework's limit.

Inputs
4 MPPT
Monitoring
Wi-Fi, app
ESA Athena, base unit
ESA Athena, base unit
ESA Athena, 2 units
ESA Athena, 2 units
ESA Athena, 3 units
ESA Athena, 3 units
With external connection cable
With external connection cable
Comparison

Balcony or roof?

Balcony solarRooftop solar
Who it's forFlats, tenantsHouses, blocks of flats with a joint decision, businesses
Size1–3 panels, output up to 800 WUsually 3–10.8 kW for homes
Output / year≈ 600 – 1,500 kWh≈ 4,500 – 15,000 kWh
InstallationA few hours1–3 days, with permitting
What it coversDaytime base loadA large share of consumption, plus heating with a heat pump
Moves house with youYesNo
How we work

From the form to the app on your phone

  1. Register your interest

    You fill in the form. There's no obligation.

  2. Balcony check

    You send us photos or we visit: orientation, railing, shading, socket.

  3. Proposal

    Number of panels, mounting, with or without a battery, and an estimate of the benefit.

  4. Installation

    Mounting, connection and testing by an electrician, in a few hours.

  5. App

    You see on your phone how much energy you generate and how much you save.

Safety

A small system, properly installed

  • The inverter stops feeding power into the circuit as soon as the grid goes down, so no one working on the line is at risk.
  • We fix the panels with railing or wall mounts rated for wind.
  • We check the circuit and the socket used for the connection.
  • The ESA Athena battery is TÜV Rheinland certified and has a built-in fire suppression system.
FAQ

What people ask us most

Do I need permission from my building?

Your balcony is for your own use, but the system affects how the building looks. We check the building's rules and the mounting, and tell you what's needed.

Can I fit it if I rent?

Usually yes, with the landlord's consent. Because nothing is altered permanently, the system comes with you when you leave.

Can I fit it if I already have solar on the roof?

It usually makes no sense on the same supply and may not be allowed. We'll check it against the terms of the new framework.

What if my balcony doesn't face south?

East and west give about 20% less energy, north about half. We'll tell you during the check whether it's worthwhile.

Am I paid for the energy that goes to the grid?

The framework will decide that. That's why our calculation counts nothing for the energy that goes out, and a battery helps you keep it.

Will I have power during a power cut?

Not without a battery, for safety reasons. With ESA Athena, essential loads connected to its backup output keep running, up to 1,500 W.

Does it simply plug into a socket?

Exactly how it connects will be set by the approval. We'll make sure an electrician connects it correctly and safely.

NewBalcony solar & batteries

Want to be one of the first? Fill in the form and we'll call you as soon as installation is permitted.

Register your interest
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