Solar yield in Porto

📍 41.16°N, -8.63°W · Porto, Portugal

Porto sits at 41.16°N in Porto, Portugal. The annual average is 4.6 h peak sun-hours per day.

A Porto-based 400 Wp array generates an estimated 525 kWh per year — after a 78% system efficiency factor (MPPT, wiring, inverter losses).

Monthly solar generation in Porto

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	15	20	26	30	33	35	30	23	16	11	9	262
400 Wp	21	29	40	51	61	66	69	61	47	33	22	18	525
800 Wp	41	58	80	103	122	133	139	122	94	66	43	36	1050
1600 Wp	82	116	161	206	243	266	277	243	187	131	86	71	2099

Best month

Jul

7.4 h/day

Worst month

Dec

1.9 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 Porto: 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 Porto's coordinates (41.16, -8.63). Real conditions vary by panel tilt, orientation, shading and weather — use the live calculator for site-specific results.

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