How many units does a 1 kW solar system generate per day in Lucknow?

About 4.3 units a day on average across the year, by the PVGIS model — from roughly 5 units in the dry months to under 3 in July. MNRE puts a clear sunny day at 4 to 5.5 units per kW.

How many units will a 3 kW system give me per month?

Around 400 units a month on average (about 4,760 a year), ranging from roughly 480 in March to about 260 in July.

Why is output lower in the monsoon?

Cloud cover cuts the sunlight reaching the panels, so July and August are the lowest months. Dust and winter fog can also reduce output on some days, which is why panels should be kept clean.

Will my system produce exactly these numbers?

No — these are modelled estimates for a well-installed, shade-free plant. Real output depends on shade, tilt, direction, cleaning, equipment and the weather in a given year. We estimate your site at the survey.

Resource Centre · Solar basics

How Much Electricity Does Solar Generate in Lucknow?

By Deepak Sharma, NCS Solar, LucknowPublished 24 September 2026

Short answer: a well-installed, shade-free 1 kW solar system in Lucknow generates about 4.3 units a day on average, or roughly 1,590 units a year. A 3 kW home system gives around 400 units a month on average — more in spring, less in the monsoon.

Month by month in Lucknow

Month	Units/day (1 kW)	Units/month (1 kW)	Units/month (3 kW)
January	4.8	150	449
February	5.1	143	428
March	5.2	161	482
April	5.0	150	451
May	4.6	143	429
June	3.8	114	341
July	2.8	86	257
August	3.1	95	284
September	3.7	111	332
October	4.6	144	432
November	4.8	144	433
December	4.8	148	445

Year: about 1,588 units per kW, or 4,763 units for a 3 kW system.

Modelled with PVGIS (European Commission Joint Research Centre) using 2005–2020 weather data for Lucknow, panels fixed at the optimum tilt facing south, and 14% system losses.

How this compares with MNRE's figure

MNRE’s rooftop solar FAQ says a 1 kW plant generates 4 to 5.5 units on a clear sunny day. The Lucknow averages above fall in that range for most of the year and drop below it in the monsoon months, when cloudy days pull the average down.

What changes your output

Shade — even partial shade from a water tank, parapet or tree cuts output sharply.
Tilt and direction — south-facing at around 30° is best in Lucknow; flatter or east/west-facing panels produce less.
Dust — dusty panels lose output; regular cleaning keeps them near their rating.
Weather — monsoon cloud and winter fog vary from year to year.
Age — panels lose a small amount of output each year, as set out in the manufacturer’s warranty.

Turning units into a system size

Divide your average monthly units by about 130 (units per kW per month in Lucknow) for a rough system size. A home using 300 units a month needs around 2.3 kW; 400 units needs around 3 kW. We confirm the size against your roof and bills at the site survey.

Sources · Last updated 24 September 2026

Figures are modelled estimates, not a guarantee of output for any particular site.

How Much Electricity Does Solar Generate in Lucknow?

Month by month in Lucknow

How this compares with MNRE's figure

What changes your output

Turning units into a system size

Solar Output — Questions

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