Solar yield in Athens

📍 37.98°N, 23.73°E · Attica, Greece

Athens sits at 37.98°N in Attica, Greece. The annual average is 4.9 h peak sun-hours per day.

A Athens-based 400 Wp array generates an estimated 560 kWh per year — after a 78% system efficiency factor (MPPT, wiring, inverter losses).

Monthly solar generation in Athens

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	11	15	22	27	32	36	37	33	25	17	12	10	280
400 Wp	22	31	43	54	64	71	74	66	50	35	23	20	560
800 Wp	45	62	86	109	127	142	148	131	99	69	47	39	1120
1600 Wp	90	124	172	217	255	285	296	262	198	139	94	79	2240

Best month

Jul

7.9 h/day

Worst month

Dec

2.1 h/day

Annual average

4.9 h/day

Design your full off-grid system

Use the SOLARIS calculator to size a complete off-grid LiFePO4 system for Athens: 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 Athens's coordinates (37.98, 23.73). Real conditions vary by panel tilt, orientation, shading and weather — use the live calculator for site-specific results.

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