Solar panels in Rome
A 6 kWp home system in Rome is modelled to produce about 8,577 kWh a year, or 1,429 kWh per installed kWp, from PVGIS climate data at the city's coordinates. In December 2024 Rome's city assembly approved a regulation making Roma Capitale's areas and PV systems available to solidarity renewable energy communities, with families in energy poverty among the intended beneficiaries. Rome produces 8% more per kWp than the national reference point on our Italy page. Year-one savings come to about EUR 1,214, for a simple payback of 5.0 years. On yield, Rome is 2nd of our 3 Italy cities. For comparison, Naples reaches 1,449.
Month by month in Rome
Modelled output of a 6 kWp system at 35° facing south (towards the equator), from PVGIS climate data (PVGIS-SARAH3, 2005 to 2023).
| Month | kWh | Share of year |
|---|---|---|
| January | 511 | 6.0% |
| February | 578 | 6.7% |
| March | 728 | 8.5% |
| April | 788 | 9.2% |
| May | 841 | 9.8% |
| June | 868 | 10.1% |
| July | 940 | 11.0% |
| August | 903 | 10.5% |
| September | 767 | 8.9% |
| October | 670 | 7.8% |
| November | 501 | 5.8% |
| December | 484 | 5.6% |
- Best month: July (940 kWh). Weakest: December (484 kWh), a 1.9x difference.
- June, July, August produce 31.6% of the year; January, November, December produce 17.4%.
- Year-to-year variation: about 321 kWh (3.7%, one standard deviation).
- Sunlight reaching the panels: 1,926 kWh per m² a year.
Local rules and support in Rome
Rules set by the city or its region, on top of the national scheme. Each one was checked against the official source on the date shown.
- Roma Capitale
Rome opens municipal solar roofs to solidarity energy communities
In December 2024 Rome's city assembly approved a regulation making Roma Capitale's areas and PV systems available to solidarity renewable energy communities, with families in energy poverty among the intended beneficiaries.
Source: Roma Capitale, Comunità energetiche, Assemblea approva regolamento (13 dicembre 2024) (checked 2026-09-25)
How Rome compares
Rome ranks 2 of 3 for yield among the cities we model in Italy, and 14 of 41 across every country on Solar Figures. Within one country the prices are the same, so a payback gap between these cities comes from sunshine alone.
| City | kWh per kWp / yr | Payback (EUR) |
|---|---|---|
| Naples | 1,449 | 4.9 yrs |
| Rome | 1,429 | 5.0 yrs |
| Milan | 1,298 | 5.6 yrs |
| National reference point (country page) | 1,325 | 5.4 yrs |
Closest yield abroad: Mumbai (1,446 kWh per kWp), Bangalore (1,403 kWh per kWp), Brisbane (1,469 kWh per kWp).
What moves the payback in Rome
Power you use yourself is worth the retail price (€0.29 per kWh); power you export earns €0.08. So the share you use at home, by running appliances in daylight or adding a battery, changes the payback. The system cost stays the same in every row (a battery would add to it).
| Used at home | Year-1 savings | Payback |
|---|---|---|
| 20% | €1,036 | 6.0 yrs |
| 30% (our default) | €1,214 | 5.0 yrs |
| 50% | €1,571 | 3.8 yrs |
| 70% | €1,927 | 3.1 yrs |
- Net system cost after incentives: €5,707 for 6 kWp.
- Incentive modelled: €3,893 (Detrazione ristrutturazione 50% (abitazione principale, 2026 only), max deduction 48,000 EUR, over 10 yrs (IRPEF)).
- 25-year net savings at our default: €30,249.
Best panel angle in Rome
At latitude 41.9°N, PVGIS finds the fixed tilt and direction that maximise yearly output. Our figures use a common 35° roof; the table shows what the optimum adds.
| Setup | Tilt | Facing | kWh per kWp / yr |
|---|---|---|---|
| Standard roof (used on this page) | 35° | south | 1,429 |
| PVGIS optimum | 37° | south (176°) | 1,431 |
The optimum adds 0.1% a year over the standard roof in Rome. Most of a roof's value comes from its direction: a roof facing away from the equator loses far more than a few degrees of tilt.
See the full Italy picture on our Italy solar page, or the national incentives in our Italy solar guide.
Sources and method
Figures computed 2026-09-25 for a 6 kWp system, 35° tilt, 14% system losses, terrain shading on. An estimate, not a quote: your installer's quote will be exact.
- PVGIS 5.3 PVcalc (PVGIS-SARAH3), European Commission JRC (checked 2026-09-25)
- Italy tariff and incentive inputs (see DATA_SOURCES.md) (checked 2026-06-21)
- Roma Capitale: Comunità energetiche, Assemblea approva regolamento (13 dicembre 2024) (checked 2026-09-25)
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