Solar yield in Lisbon

📍 38.72°N, -9.14°W · Lisbon, Portugal

Lisbon sits at 38.72°N in Lisbon, Portugal. The annual average is 5.0 h peak sun-hours per day.

A Lisbon-based 400 Wp array generates an estimated 569 kWh per year — after a 78% system efficiency factor (MPPT, wiring, inverter losses).

Monthly solar generation in Lisbon

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	12	16	22	28	32	36	37	33	25	18	13	10	285
400 Wp	23	32	44	55	65	71	74	66	51	36	25	21	569
800 Wp	47	64	88	110	129	142	148	131	101	71	51	41	1139
1600 Wp	94	127	176	221	258	285	296	262	202	142	101	82	2278

Best month

Jul

7.9 h/day

Worst month

Dec

2.2 h/day

Annual average

5.0 h/day

Design your full off-grid system

Use the SOLARIS calculator to size a complete off-grid LiFePO4 system for Lisbon: 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 Lisbon's coordinates (38.72, -9.14). Real conditions vary by panel tilt, orientation, shading and weather — use the live calculator for site-specific results.

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