A power plant, not an appliance
A balcony kit with a microinverter works in parallel with the distribution grid, so Czech regulations treat it as a generating plant – a micro-generator. You may connect it according to the rules of the distribution system operator, not just by sticking the plug into a socket.
Procedures differ by distributor. According to reports from August 2026, EG.D has a category for sources up to 800 W without export to the grid and requires a new connection agreement; PRE does not require loop impedance measurement for micro-generators up to 800 W, but wants export to the grid to be technically prevented; and ČEZ Distribuce uses a simplified regime for micro-generators without export. The rules keep changing, so check them with your distributor before you buy.
Grid export: the main catch
An inverter limited to 800 W does not mean no electricity flows into the grid. When the panels produce more than you are using at that moment, the surplus flows out. Without a contract, that is unauthorised supply, which is why distributors want a device that prevents export (measuring the household's consumption and controlling the inverter). Cheap kits often don't include one.
What's in the pipeline
An amendment that would simplify connection (inverter up to 800 W, panels up to 2 kWp and just a notification to the distributor instead of its consent) passed the Chamber of Deputies in July 2026, according to available reports, and the Senate sent it back in August. Until the new rules take effect, follow your distributor's instructions.
A balcony in a block of flats
Railings, balconies and the façade are usually common parts of the building. Before you bolt the kit on, ask the SVJ (owners' association) or the housing cooperative – and think about the mounting and the wind as well: a panel on a balcony is a sail.
Where an inspection helps
A micro-generator is electrical equipment connected to the household installation. The distributor may require an inspection report for the connection, and even if it doesn't, it pays to check the circuit you are plugging the kit into. The inspection focuses mainly on:
- The condition of the socket and the circuit the kit is plugged into
- The residual current device (RCD) and circuit protection
- The insulation condition of the cables and panel connectors
- How the cabling is laid and protected against the weather
Frequently asked questions
Can I just plug balcony solar into a socket?
Under the current rules, not without further steps. It is a micro-generator working in parallel with the grid, so connection follows the rules of the distributor (ČEZ Distribuce, EG.D, PRE), which usually wants an application or a contract and prevention of grid export.
What is grid export and why is it a problem?
Export is the extra electricity the panels produce that flows into the grid. Without a contract it is unauthorised supply, which is why distributors require a device that prevents export.
Does balcony solar need an inspection?
The distributor may require one for the connection. Even without that, we recommend checking the circuit you plug the kit into, especially the RCD, the circuit protection and the condition of the socket.
When will the rules get simpler?
An amendment with a simpler notification for inverters up to 800 W was debated in 2026, but at the time of writing (October 2026) it was not in force. Check the current situation with your distributor.
What risks arise if I simply plug a balcony photovoltaic system into a socket without an inspection?
A balcony kit with a microinverter operates in parallel with the grid, so Czech regulations treat it as a micro-source, and you may connect it according to the distributor's rules, not just by inserting the plug into the socket. When the panels generate more than you consume, the surplus flows into the grid, and without a contract this constitutes unauthorized supply. The inspection therefore focuses on the condition of the socket and circuit, the residual current device and protection, the insulation condition of cables and panel connectors, and the routing of the wiring.
How should I properly connect a balcony photovoltaic system so that it complies with Czech rules?
Czech regulations treat a balcony kit with a microinverter as a micro-source, so you must not just plug it into a socket – you must follow your distributor's rules, which differ (EG.D, PRE and ČEZ Distribuce each have their own procedures). In addition, distributors often require a device that technically prevents feed-in to the grid, because cheap kits often do not include one. Therefore, before purchasing, verify the rules with your distributor.