Solar panels in Naples
PVGIS climate data puts Naples at roughly 1,449 kWh per kWp each year, so a typical 6 kWp roof makes around 8,696 kWh. Under the national Reddito Energetico scheme for low-income households (PV of 2 to 6 kW), GSE reserved 82,290,554 euros of the 2025 funds for Abruzzo, Basilicata, Calabria, Campania, Molise, Puglia, Sardinia and Sicily, against 20,875,523 euros for all other regions. Naples produces 9% more per kWp than the national reference point on our Italy page. No other city we cover in Italy has a higher yield than Naples. For comparison, Rome reaches 1,429. On our model, the system saves about EUR 1,231 in year one and pays back in 4.9 years.
Month by month in Naples
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 | 494 | 5.7% |
| February | 549 | 6.3% |
| March | 725 | 8.3% |
| April | 803 | 9.2% |
| May | 875 | 10.1% |
| June | 896 | 10.3% |
| July | 965 | 11.1% |
| August | 931 | 10.7% |
| September | 789 | 9.1% |
| October | 690 | 7.9% |
| November | 492 | 5.7% |
| December | 487 | 5.6% |
- Best month: July (965 kWh). Weakest: December (487 kWh), a 2x difference.
- June, July, August produce 32.1% of the year; January, November, December produce 16.9%.
- Year-to-year variation: about 269 kWh (3.1%, one standard deviation).
- Sunlight reaching the panels: 1,918 kWh per m² a year.
Local rules and support in Naples
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.
- Campania (Southern regions allocation)
Larger Reddito Energetico pool for Campania
Under the national Reddito Energetico scheme for low-income households (PV of 2 to 6 kW), GSE reserved 82,290,554 euros of the 2025 funds for Abruzzo, Basilicata, Calabria, Campania, Molise, Puglia, Sardinia and Sicily, against 20,875,523 euros for all other regions. Eligibility requires an ISEE below 15,000 euros, or below 30,000 euros for families with at least four dependent children.
Source: GSE (Gestore dei Servizi Energetici), Reddito Energetico Nazionale (checked 2026-09-25)
How Naples compares
Naples ranks 1 of 3 for yield among the cities we model in Italy, and 12 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), Brisbane (1,469 kWh per kWp), Bangalore (1,403 kWh per kWp).
What moves the payback in Naples
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% | €1,050 | 5.9 yrs |
| 30% (our default) | €1,231 | 4.9 yrs |
| 50% | €1,593 | 3.7 yrs |
| 70% | €1,954 | 3.0 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: €30,717.
Best panel angle in Naples
At latitude 40.85°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 | 1,449 |
| PVGIS optimum | 35° | south (179°) | 1,449 |
In Naples a 35° roof is already at the optimum. 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)
- GSE (Gestore dei Servizi Energetici): Reddito Energetico Nazionale (checked 2026-09-25)
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