Explore country-by-country guidance for plug-in solar systems.
🇦🇹 Austria
Legal
Maximum (plugin): 800 W
Maximum (other kits): Above 800 W: installer + grid request
Legal up to 800 W inverter output; notify your grid operator 2 weeks before use. No permit or electrician required. Surplus is unpaid unless you request a feed-in meter point.
See Austria guide
🇧🇪 Belgium
Legal
Maximum (plugin): 800 W
Maximum (other kits): Above 800 W via socket + registration
Legal with a Synergrid-listed inverter, plugged into a wall socket; no electrician. Above 800 W possible (Flanders: register with Fluvius). Surplus paid at supplier rate.
See Belgium guide
🇧🇬 Bulgaria
Unknown
Maximum (plugin): None set
Maximum (other kits): Same route: notice + design docs
No plug-in rule: even an 800 W kit needs a notice to the grid operator and zero-export wiring. Apartments need owners' consent and a permit. Surplus power is not paid.
See Bulgaria guide
🇭🇷 Croatia
Unknown
Maximum (plugin): None set
Maximum (other kits): Up to 3.68 kW (1-ph) / 11.04 kW (3-ph) by notice
No plug-in rule; kits count as solar plants. Up to 3.68 kW (1-phase) you install, then notify HEP ODS, which fits a two-way meter within 30 days. Surplus earns 90% of energy price.
See Croatia guide
🇨🇾 Cyprus
Unknown
Maximum (plugin): None set
Maximum (other kits): With electrician + EAC approval
No plug-in rule yet. Any grid-connected solar needs an EAC Net Billing application, a licensed electrician and an inspection. Off-grid use needs no approval.
See Cyprus guide
🇨🇿 Czechia
Unknown
Maximum (plugin): 800 W
Maximum (other kits): Up to 10.8 kW with electrician
No plug-in law yet. A kit counts as a micro-source: apply to your grid operator before use, with zero grid export. Paperwork is lighter up to 800 W.
See Czechia guide
🇩🇰 Denmark
Not allowed
Maximum (plugin): Not allowed
Maximum (other kits): Not via socket (electrician only)
Plugging a solar kit into a wall socket is not allowed. Kits are legal only if an authorised electrician connects them in the fuse box. Surplus can be sold at spot price.
See Denmark guide
🇪🇪 Estonia
Legal
Maximum (plugin): 800 W
Maximum (other kits): Above 800 W: €615 connection + electrician
Allowed up to 800 W per home (official cap just under 0.8 kW): register free with Elektrilevi online, no electrician. No export by default; selling surplus needs a paid meter swap.
See Estonia guide
🇫🇮 Finland
Not allowed
Maximum (plugin): Not allowed
Maximum (other kits): Not via socket (electrician only)
Not allowed: Tukes says plugging solar panels into a socket is illegal. Small systems must be connected by a registered electrical contractor and reported to the network company.
See Finland guide
🇫🇷 France
Legal
Maximum (plugin): None set
Maximum (other kits): Up to 3 kVA via socket + Enedis declaration
Kits can be plugged in after a free Enedis declaration (up to 3 kVA, no battery). No paid feed-in. The 2024 wiring standard discourages socket connection; check your circuit.
See France guide
🇩🇪 Germany
Legal
Maximum (plugin): 800 W
Maximum (other kits): Not via socket (installer)
Up to 800 W inverter and 2,000 Wp of panels (960 Wp on a normal socket). Free online registration within one month; no electrician. Surplus feeds in unpaid.
See Germany guide
🇬🇷 Greece
Legal
Maximum (plugin): 800 W
Maximum (other kits): Not via socket; up to 10.8 kW with installer
Legal since 14 September 2026: up to 800 W (1,000 Wp panels), one kit per meter. Notify HEDNO online; an electrician must sign off. Surplus sent to the grid is not paid.
See Greece guide
🇭🇺 Hungary
Not allowed
Maximum (plugin): Not allowed
Maximum (other kits): Not via socket (HMKE approval)
Plug-in solar is not allowed: any grid-connected panel counts as a household power plant (HMKE) needing grid-operator approval, and solar panels on balconies are banned.
See Hungary guide
🇮🇪 Ireland
Unknown
Maximum (plugin): None set
Maximum (other kits): Up to 6 kVA (1-ph) / 11 kVA (3-ph) with electrician + NC6
No plug-in rule yet: kits must be wired in by a registered electrician and notified to ESB Networks (NC6). A simplified 800 W route is planned, aimed for mid-2027.
See Ireland guide
🇮🇹 Italy
Legal
Maximum (plugin): 800 W
Maximum (other kits): Above 800 W: standard procedure + installer
Up to 800 W with one free notice (Comunicazione Unica) to your grid operator, including a conformity declaration and wiring diagram. Surplus feed-in allowed, unpaid.
See Italy guide
🇱🇻 Latvia
Unknown
Maximum (plugin): None set
Maximum (other kits): Up to 3.7 kW (1-ph) with certified installer
No plug-in rule. Any grid-connected solar needs Sadales tīkls permission and a certified installer. Surplus can be credited via a net-settlement contract.
See Latvia guide
🇱🇹 Lithuania
Legal
Maximum (plugin): 800 W
Maximum (other kits): Above 800 W: certified contractor
Up to 800 W inverter output and 3,600 Wp of panels. Declare it yourself online to ESO, no electrician needed. Surplus is stored in the grid for a fee.
See Lithuania guide
🇱🇺 Luxembourg
Legal
Maximum (plugin): 800 W
Maximum (other kits): Above 800 W: electrician + grid declaration
Legal up to 800 W inverter output (official cap 799 W) on an existing circuit. No registration below 0.8 kW. RCD required. Surplus to the grid is unpaid. No Klimabonus for kits.
See Luxembourg guide
🇲🇹 Malta
Unknown
Maximum (plugin): None set
Maximum (other kits): With electrician; notice up to 3.68 kW (1-ph)
No plug-in rule. Any solar system must be notified to REWS, wired to BS 7671 (not via a socket) and certified by an authorised electrician. Surplus can earn a feed-in tariff.
See Malta guide
🇳🇱 Netherlands
Legal
Maximum (plugin): None set
Maximum (other kits): Same rule: own circuit (electrician)
No specific plug-in rule. The Dutch wiring standard requires solar on its own circuit, so plan for an electrician. Register at energieleveren.nl. Net metering ends 1 January 2027.
See Netherlands guide
🇳🇴 Norway
Legal
Maximum (plugin): None set
Maximum (other kits): Same rule: dedicated circuit (electrician)
Legal with caveats: not in an ordinary socket. Use a dedicated circuit installed by a registered electrician. No watt limit; surplus can be sold as a "plusskunde".
See Norway guide
🇵🇱 Poland
Unknown
Maximum (plugin): None set
Maximum (other kits): Up to 50 kW with installer + grid notice
No plug-in rules or watt limit. A kit counts as a microinstallation: a qualified installer fits it and the grid operator is notified 30 days ahead. Surplus is credited at market price.
See Poland guide
🇵🇹 Portugal
Legal
Maximum (plugin): 800 W
Maximum (other kits): Above 800 W: installer + DGEG notice
Up to 800 W with no permit, if no power flows to the grid (zero export). With grid export or above 800 W: DGEG notification and a certified installer.
See Portugal guide
🇷🇴 Romania
Legal
Maximum (plugin): 800 W
Maximum (other kits): Up to 400 kW as prosumer
Kits under 800 W may use a socket, but ANRE requires an authorised electrician and prior notice to your grid operator. Surplus power is unpaid unless you become a prosumer.
See Romania guide
🇸🇰 Slovakia
Unknown
Maximum (plugin): None set
Maximum (other kits): Up to 10.8 kW with grid-operator contract
No plug-in rule or watt limit. Even an 800 W kit is a "small source": apply to your grid operator, sign a free connection contract and wait for a two-way meter before plugging in.
See Slovakia guide
🇸🇮 Slovenia
Legal
Maximum (plugin): 600 W
Maximum (other kits): 800 W+ with connection approval
Legal for households up to 600 W. Notify your grid operator 14 days before use. No electrician or approval needed. Surplus may flow to the grid but is not paid.
See Slovenia guide
🇪🇸 Spain
Legal
Maximum (plugin): 800 W
Maximum (other kits): Dedicated circuit + CIE
Kits up to 800 W can plug into an existing circuit with no paperwork if they never export to the grid. Exporting or going above 800 W needs an installer's certificate (CIE).
See Spain guide
🇸🇪 Sweden
Not allowed
Maximum (plugin): Not allowed
Maximum (other kits): Not via socket (electrician only)
Plugging a solar kit into a socket is not allowed. A registered electrical company must connect panels permanently and notify your grid company first.
See Sweden guide
🇨🇭 Switzerland
Legal
Maximum (plugin): 600 W
Maximum (other kits): Above 600 W with licensed installer
Up to 600 W per meter, Swiss plug, built-in RCD/RCMU. Notify your grid operator in writing before use. No electrician needed. Surplus is paid by the grid operator.
See Switzerland guide
🇬🇧 United Kingdom
Legal
Maximum (plugin): 800 W
Maximum (other kits): Not via socket (G98/G99 installer)
Legal in Great Britain since 27 August 2026, not Northern Ireland. 800 W AC / 2,000 W panels, ENA-listed kit, no battery, register before use. No electrician; surplus unpaid.
See United Kingdom guide