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Every calculator you need to plan, size, finance, and install solar in India. Built for homeowners, farmers, and installers.
Start here — foundational tools that size your complete solar solution.
Estimate system size, cost, subsidy, and 25-year savings based on your electricity bill.
Calculate your exact central + UP state subsidy amount for 1kW to 10kW systems.
Find the right kW for your home based on monthly units, area, or budget.
Add your appliances, usage hours, and get recommended solar size, battery & inverter.
Size individual components — batteries, inverters, cables, and controllers.
Size your battery bank based on load, backup hours, and battery chemistry (Lead-acid / Li-ion).
Get the right VA/kVA inverter based on connected load and surge requirements.
Pick the right DC / AC cable thickness for your string length and current.
Size and choose between PWM and MPPT charge controllers for your off-grid system.
Plan solar for specific loads — AC, pumps, chakki, water heaters.
See how many panels, batteries & inverter you need to run your AC on solar.
Size solar panels for 1HP, 2HP, 3HP, 5HP agricultural and domestic water pumps.
Size a solar system for flour mill / atta chakki (1HP-10HP). Daily output to panel count.
Size FPC or ETC solar water heater for family size and daily hot water needs.
Optimize your site layout — tilt, roof area, shadow, and orientation.
Find the optimal tilt angle by latitude and season for maximum annual output.
How many panels fit on your roof — enter length × width to see possible kW.
Peak sun hours by district + shadow loss estimator for real-world output.
Set your panels to true south with azimuth correction for maximum yield.
Understand ROI, savings, and environmental impact over 25 years.
Compare bank loans, NBFC financing, and zero-cost EMI side-by-side.
Calculate net-metering credits and monthly bill after export to the grid.
See exactly when your solar system starts generating pure profit.
Convert your solar output into CO₂ saved, trees planted, and car-km offset.
Find your levelised cost of solar energy vs your current grid tariff.
How many hours your battery can run your selected appliances during an outage.
Side-by-side comparisons — technology, grid type, and alternatives.
Compare Waaree, Adani, Tata, Vikram and more — warranty, efficiency, price.
See the 10-year cost difference between solar and a diesel generator.
Interactive cost, efficiency, and space comparison between mono and poly panels.
Answer a few questions and get the right system type for your home.
Start with the Appliance Load Calculator if you want to build the right system from your actual usage, or with the Solar Savings Calculator if you just want a quick estimate from your electricity bill.
Yes, every calculator on this page is completely free and requires no signup. We only ask for your contact details if you want a customised quote from our UPNEDA registered team.
All calculators use the PM Surya Ghar 2026 rates: ₹30,000 for 1 kW, ₹60,000 for 2 kW, and ₹78,000 for 3 kW and above. Uttar Pradesh state subsidy of ₹15,000/kW (max ₹30,000) is also included where applicable.
Most tools support residential, commercial, and industrial use. The Solar Calculator and Payback Calculator have specific modes for commercial loads with 0% subsidy, different tariff slabs, and accelerated depreciation.
They use 2026 pricing, state-specific tariffs, MNRE subsidy slabs, and real generation data from UP districts. Final quotations after site survey may vary by ±5–10% based on roof conditions, DISCOM requirements, and panel/inverter availability.
Our UPNEDA registered engineers will run the numbers for your home, share a detailed quote with subsidy breakup, and book a free site survey.