Solar yield in Naples

📍 40.85°N, 14.27°E · Campania, Italy

Naples sits at 40.85°N in Campania, Italy. The annual average is 4.6 h peak sun-hours per day.

A Naples-based 400 Wp array generates an estimated 521 kWh per year — after a 78% system efficiency factor (MPPT, wiring, inverter losses).

Monthly solar generation in Naples

Average daily kWh per month for common solar array sizes

Array size	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual kWh
200 Wp	10	14	20	25	30	33	35	31	23	16	11	8	261
400 Wp	20	28	39	51	60	66	70	62	47	33	22	17	521
800 Wp	39	56	79	101	120	133	140	124	94	66	43	34	1042
1600 Wp	79	112	157	202	240	266	281	247	187	131	86	67	2084

Best month

Jul

7.5 h/day

Worst month

Dec

1.8 h/day

Annual average

4.6 h/day

Design your full off-grid system

Use the SOLARIS calculator to size a complete off-grid LiFePO4 system for Naples: battery bank, inverter, cable cross-section, fuses and a wiring diagram. Pin your exact location on the map for live NASA POWER data.

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How we calculated this

Daily generation = panel Wp × peak sun-hours × system efficiency (0.78). Sun-hour values are 20-year averages from NASA POWER, sourced for Naples's coordinates (40.85, 14.27). Real conditions vary by panel tilt, orientation, shading and weather — use the live calculator for site-specific results.

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