Un solo condomino può bloccare l'installazione dell'impianto?

No. Trattandosi di un intervento di efficientamento energetico ("innovazione agevolata"), non è richiesta l'unanimità e nessuno ha diritto di veto. Per approvare il progetto in assemblea basta il voto favorevole della maggioranza dei presenti che rappresenti almeno 500 millesimi (la metà del valore dell'edificio). I condomini contrari non possono bloccare i lavori, ma conservano il diritto di impugnare la delibera entro 30 giorni se ritengono lesi i propri diritti individuali

Come avviene in pratica la ripartizione dell'energia tra i condomini?

Nel caso dell'autoconsumo collettivo, il GSE calcola ogni ora quanta energia è stata prodotta dall'impianto condominiale e quanta ne hanno consumata i singoli partecipanti. La quota di energia virtualmente condivisa viene sottratta dalla bolletta individuale secondo le percentuali di partecipazione stabilite nel regolamento della configurazione, che può essere basato sui millesimi o su altri criteri concordati in assemblea.

Cosa succede se un condomino vende o affitta il proprio appartamento?

L'impianto è una pertinenza delle parti comuni dell'edificio, quindi non è legato alla singola unità abitativa ma al condominio nel suo insieme. In caso di vendita, l'acquirente subentra automaticamente nei diritti e negli obblighi legati alla partecipazione all'impianto. In caso di affitto, la questione della ripartizione dei benefici tra proprietario e inquilino va regolata nel contratto di locazione.

Un impianto privato già esistente in una singola unità è compatibile con quello condominiale?

Generalmente sì. I due impianti sono tecnicamente distinti e alimentano utenze diverse: quello condominiale serve le parti comuni (o la configurazione collettiva), quello privato serve l'unità abitativa. Possono coesistere sullo stesso edificio, a patto che ci sia sufficiente spazio sulle superfici disponibili e che la somma delle potenze installate rispetti i limiti normativi applicabili.

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Photovoltaic

Condominium Photovoltaic: complete guide

From the meeting to incentives. What to know to install Photovoltaic panels in a condominium.

Installing a condominium Photovoltaic system is no longer a possibility reserved for independent homes. Those who live in a condominium can also produce solar Energy, reduce expenses for common parts and contribute to the Energy transition.

Understanding how the process works, which rules apply and what advantages it brings is the first step in assessing whether this solution is right for your building.

What is a condominium Photovoltaic system?

Condominium Photovoltaic is a Photovoltaic system installed on common parts of the condominium building, such as the roof, the flat roof or a shared pergola, with the aim of producing electricity for common use. Unlike a private system, here the system belongs to the condominium as a whole and the Energy produced powers condominium utilities: lift, corridor lighting, pumps, automatic gates and similar uses.

Thanks to the regulations introduced by Legislative Decree 199/2021, which transposes the European RED II Directive, condominiums can now set up collective self-consumption configurations or join a Renewable Energy Community, CER, extending the advantages of solar production also to individual housing units. This is a significant change that opens up new possibilities for those who live in a condominium and want to actively participate in their own Energy transition.

How it works: from production to allocation

The operation of a condominium Photovoltaic system follows the same logic as any solar Energy system: Photovoltaic panels capture solar radiation and convert it into electricity through the Photovoltaic effect. The Energy produced is then distributed within the building or fed into the grid.

There are two main methods of use:

Self-consumption for common parts: the Energy produced directly powers condominium utilities, reducing the condominium’s bill expenses.

Collective self-consumption or CER: excess Energy is virtually shared among the condominium owners who join the configuration, allowing savings also on private bills.

The allocation of Energy among participants takes place on an hourly basis, calculated by the GSE, Energy Services Operator, which is the public body that manages incentive mechanisms in Italy.

Bureaucratic process: the condominium resolution and authorizations

To install a condominium Photovoltaic system, unanimity is not required. The Civil Code, Articles 1120 and 1136 of the Italian Civil Code, in fact includes works for Renewable sources among “facilitated innovations”. This means that the legislator has provided for reduced approval quorums compared to ordinary innovations, precisely to promote the Energy transition in buildings and prevent individual owners from blocking the works.

The main phases of the process are:

Inclusion of the system on the agenda of the meeting.

Approval by the majority of those present representing at least half of the value of the building, 500 thousandths.

Analysis of the available roof surface, solar exposure and any shading.

Verification of any landscape constraints and submission of municipal procedures.

Installation of the panels and connection to the electricity grid through the local distributor.

Activation of the agreement to obtain incentives or Dedicated Withdrawal, RID, for the Energy fed into the grid.

For an in-depth look at the installation process and technical requirements, it is useful to consult the guide to Photovoltaic installation, which describes the practical steps from the initial analysis to putting the system into operation.

Costs, incentives and payback times

The costs of a condominium Photovoltaic system vary according to the installed capacity, the available surface and the structural characteristics of the building. In general, for an average condominium, investments can be estimated starting from a few thousand euros for small-sized systems and increasing proportionally for larger systems.

In terms of incentives, those who install a condominium Photovoltaic system can access several benefits:

Benefit	Detail
Renovation Bonus, Art. 16-bis TUIR	50% main residence, 36% second homes. Maximum expense €96,000 per property unit. Recovery in 10 annual IRPEF instalments.
GSE incentives — CACER Decree, MASE Ministerial Decree No. 414/2023	Incentive tariff on shared Energy for 20 years. Collective self-consumption: sharing limited to condominium owners in the same building. CER: external entities can also participate, such as small businesses, third-sector entities and other users connected to the same primary substation.
Dedicated Withdrawal, RID	Excess Energy is transferred to the GSE with consideration calculated on the zonal price, monthly payment. Since 26 September 2025, On-Site Exchange can no longer be activated for new systems, ARERA Resolution 78/2025/R/efr: RID is now the only mechanism available.

For a complete and updated overview of the available benefits, consult the Photovoltaic incentives page, with practical guidance on how to access them.

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Frequently Asked Questions

No. Since this is an Energy efficiency intervention, a “facilitated innovation”, unanimity is not required and no one has a right of veto. To approve the project in the meeting, the favourable vote of the majority of those present representing at least 500 thousandths, half of the value of the building, is sufficient. Condominium owners who oppose it cannot block the works, but retain the right to challenge the resolution within 30 days if they believe their individual rights have been harmed.

In the case of collective self-consumption, the GSE calculates every hour how much Energy has been produced by the condominium system and how much individual participants have consumed. The share of virtually shared Energy is deducted from the individual bill according to the participation percentages established in the configuration regulations, which may be based on thousandths or on other criteria agreed in the meeting.

The system is an appurtenance of the common parts of the building, so it is not linked to the individual housing unit but to the condominium as a whole. In the event of sale, the buyer automatically takes over the rights and obligations linked to participation in the system. In the event of rental, the issue of allocating benefits between owner and tenant must be regulated in the lease agreement.

Generally yes. The two systems are technically distinct and power different utilities: the condominium one serves the common parts or the collective configuration, while the private one serves the housing unit. They can coexist on the same building, provided there is sufficient space on the available surfaces and the sum of the installed capacities complies with the applicable regulatory limits.