PM-KUSUM Component-C Feasibility Calculator

1Choose how solar reaches your pump

Solarise my own pump

Individual Pump Solarisation (IPS)

Your pump gets its own PV array. Estimate cost, subsidy, and your personal payback.

My village / feeder is getting a shared solar plant

Feeder Level Solarisation (FLS)

A larger plant supplies the feeder. Farmer economics depend on land-lease or power-reliability terms.

2Enter the field record

Pump size (HP)

Check the motor nameplate.

Motor type

Old submersible

Efficiency 0.55

Centrifugal

Efficiency 0.65

BEE 5-star

Efficiency 0.70

Daily operating hours

Average during irrigation season.

How are you currently billed?

Flat-rate (₹/HP/month)

Fixed monthly — common in Bihar, UP, MP

Metered (₹/unit) or Diesel

Billed by actual units or running on diesel

Flat rate (₹ per HP per month)

Bihar: ₹100/HP/month · Haryana: ₹15/HP/month

Land available for panels (sq ft)

~100 sq ft per kWp needed

⚙ Edit assumptions — see every constant used ▾

System efficiency

Benchmark ₹/Wp (≤3 kWp)

Benchmark ₹/Wp (3-10 kWp)

Central subsidy (%)

State top-up (%)

Diesel kWh/litre

4Your answers

Kitna lagega? — What you pay

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Kitna bachega? — Monthly savings

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Kab wapas milega? — Payback

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⛽

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litres of diesel saved every year

🌳

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trees-worth of CO₂ absorbed every year

☀️

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solar system for your pump

Space needed

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Technical details — formulas & full breakdown ▾

System size—

Pump load—

Daily energy need—

Gross cost (before subsidy)—

Government subsidy—

Net cost (what you pay)—

Annual units generated—

Annual savings—

Sun hours (NASA POWER)—

Benchmark rate—

Methodology & sources

Pump load = HP × 0.746 ÷ motor efficiency · MNRE PM-KUSUM Component-C guidelines
Daily energy = pump load × operating hours
PV size = daily energy ÷ (sun hours × 0.75) · 0.75 = MNRE BOS default · sun hours from NASA POWER live API
Gross cost = PV size × 1000 × benchmark ₹/Wp · MNRE 2024: ₹45/Wp (≤3 kWp), ₹40/Wp (3–10 kWp)
Subsidy = Central CFA 30% (MNRE PM-KUSUM 2023) + verified state top-up
Savings (flat-rate) = ₹/HP/month × HP × 12 · Bihar ₹100/HP/month (Bihar DISCOM FY2024-25) · Haryana ₹15/HP/month (HERC FY2025-26)
Savings (metered) = annual units × ₹/unit
CO₂ = annual units × 0.716 kg/kWh · CEA CO₂ Baseline Database 2023
Land = PV size × 100 sq ft/kWp (approximate, ground-mounted)
Worked example: Kochgawan, Nalanda, Bihar · 5 HP · 3.75 hrs/day · ₹100/HP/month · GHI 4.657 kWh/m²/day (NASA POWER 2010–2025, self-collected for microgrid project)