What would your roof earn?

Kannur irradiance, current KSEB domestic slabs and the real PM Surya Ghar subsidy steps — not a national average. Move the sliders and everything below updates as you go.

Use your bimonthly KSEB bill divided by two.

Property type

Central subsidy applies to residential rooftops only.

About 80 sq ft carries 1 kW of modules.

Which way does the roof face?

South-facing is ideal. A flat roof counts as south — we tilt the frames.

Shading through the day

A coconut palm crossing the array in the afternoon counts as "some".

Recommended system

3.0kW

About 7 panels · 240 sq ft

System cost
₹1,74,000
Central subsidy
− ₹78,000
Your investment
₹96,000
Monthly saving
₹2,650
Payback period
3.0 yrs
Saved over 25 years
₹9.4 L

Roughly 3.3 t of CO₂ avoided each year — about 157 trees planted, every year, for 25 years.

Get this quoted properly Or talk it through with us

Indicative only. A free site survey gives you a firm price — roof orientation, shading and your actual tariff slab all move these numbers.

Across the year

What your system would generate, month by month.

Units per month for the size above, using our measured Kannur profile. The monsoon dip is real — net metering is what carries you through it.

Estimated annual generation

4,599units

Best month

March · 470 units

Hover a bar for the monthly figure.

Show your working

Every number this page uses.

Any calculator can produce a flattering figure by hiding its assumptions. Here are ours, so you can check them against another quote.

Assumptions used by the savings calculator
AssumptionValueWhy
Generation4.2 units per kW per dayOur measured Kannur annual average, monsoon included
Roof area80 sq ft per kWTypical spacing for 550 W modules with walkways
System cost₹62k/kW under 2 kW, falling to ₹43k/kW above 50 kWSmaller systems carry the same fixed costs over fewer kilowatts
Tariff₹5.60 to ₹8.20 by slab; ₹8.50 commercialKSEB domestic slabs — the more you use, the more each unit saves
Subsidy₹30,000/kW for the first 2 kW, ₹18,000 for the third, ₹78,000 capPM Surya Ghar, residential grid-connected only
Maximum bill offset95%Fixed charges and meter rent survive any array
Degradation0.92 average output factor over 25 yearsPanels lose roughly 0.5% of output a year
Grid carbon0.71 kg CO₂ per unitIndian grid average emission factor

A calculator cannot see your roof.

Forty minutes on site turns these estimates into a fixed price. It costs nothing.

Book a free site survey Call · +91 98955 14381