Engineering Instruments.
Precision digital assets for project sizing and financial modeling.
ROI Yield Engine
Calculate 25-year financial performance, payback periods, and state-specific subsidies.
Brand Matrix
Compare technical specifications across Adani, Tata, and global inverter partners.
String Sizer
Optimize DC configuration for specific MPPT ranges of industrial inverters.
Engineering
Whitepapers.
Access our internal research on module degradation in Indian high-thermal zones and structural wind-load protocols for North Indian rooftops.
Professional Sizing
Submit your specific site load data for a detailed engineering proposal from our senior design team.
Questions, Answered.
Straight answers from our engineers - no jargon, no sales speak.
What solar calculation tools does Varka provide? +
Varka offers a Solar ROI Calculator (bill-based), a Subsidy Eligibility Checker, a Net Metering Estimator, and a Roof Area-to-kW converter. All tools use NCR-specific irradiance data.
How accurate are the Varka solar calculation tools? +
Calculations are within 10% of actual performance based on average NCR irradiance (5.1 peak sun hours). A senior engineer validates all tool outputs before final project proposals.
Are the solar tools free to use? +
Yes. All Varka Solar calculation tools are free with no registration required. Results are shared privately and no data is stored without your explicit consent.
Which tool should I start with? +
Start with the ROI Calculator - enter your current bill amount and it returns system size, cost, subsidy, payback period, and monthly savings in about a minute; the others fine-tune from there.
Do the tool results match your proposal numbers? +
Yes - the same engine underpins both, so the number you see online is the number in your written quote (site audit can only improve it, never reduce it).
Homeowners who made the smart switch.
Real installations, real bills, real savings - verified across Delhi NCR.
“Varka delivered our 12kW Gurgaon plant in 21 days, including all DISCOM paperwork. Generation has matched the 3D simulation at 99.2%.”
“The 45kW rooftop on our factory has cut our grid bill by 78%. Their team handled accelerated depreciation documentation too.”
“Clean installation, professional engineers. Net metering took a bit longer than promised but support stayed with us throughout.”