Solar Calculators
Design rooftop and utility PV: arrays, batteries, inverters and yield.
41 calculators
Solar calculators for Tamil Nadu & South India
உங்கள் EB bill-க்கு எத்தனை kW solar தேவை? முதலில் system size கணக்கிட்டு, பிறகு generation, roof area மற்றும் investment-ஐ ஒப்பிடுங்கள்.
1. Size your solar system
Start with electricity units or bill amount. Tamil Nadu quick sizing supports domestic bill inputs; enter the correct billing period.
2. Estimate generation
Use site-specific irradiation and losses. Chennai, Coimbatore, Salem and other locations need their own shading and weather inputs.
3. Check design requirements
Review cable length, voltage drop and equipment ratings before requesting a detailed design or installation proposal.
Compare consumption, roof space and savings
For a planning example, 600 units over 60 days is 10 kWh/day. At an assumed net yield of 4 kWh/kWp/day, a 2.5 kWp system offsets that energy on average. This is an illustrative energy balance, not a guaranteed bill reduction: daytime consumption, export credit, shading and seasonal output change savings.
Tamil Nadu billing and other South Indian states
Keep monthly and two-month consumption separate. Domestic Tamil Nadu bill estimates should not be used as commercial or industrial tariffs. For Karnataka, Kerala, Andhra Pradesh, Telangana and Puducherry, use actual units and the applicable utility tariff; Tamil Nadu bill assumptions do not transfer automatically.
Design consultancy or installation?
Homeowners can request rooftop feasibility and installation enquiries. Businesses and EPC teams can request layouts, SLDs, string design, cable schedules and generation studies. Include city, connection type, sanctioned load, available roof or land area and project capacity so the scope can be reviewed.
Subsidy and final quotation
Check current eligibility and approved procedures on the official PM Surya Ghar portal and with your distribution utility. Do not deduct an unapproved subsidy from the payable project cost. Final capacity depends on roof structure, shading, sanctioned load and interconnection approval.
41 results
All solar calculators A–Z
- AC Cable Sizing
- AC Cable Sizing Calculator
- Azimuth Deviation Loss
- Battery Backup Calculator
- Battery Bank Size
- Charge Controller Size
- CO₂ Emissions Saved
- Conduit Fill
- DC Cable Size Calculator (12V / 24V / 48V)
- DC Cable Sizing
- Diesel Generator Savings
- EV + Transformer + Solar System Sizing
- EV Charging from Solar
- Fuse & Breaker Sizing
- Grid Bill Offset
- Hybrid Inverter Sizing
- Inverter Sizing
- Irradiance → Energy
- LCOE (Levelised Cost)
- Monthly Yield Split
- Net Metering Credit
- Optimal Tilt Angle
- Panel Degradation
- Peak Sun Hours
- Performance Ratio (PR)
- ROI & Payback Period
- Roof Area Required
- Shading Loss
- Solar Generation Calculator
- Solar Loan EMI Calculator
- Solar MMS Structural Design & STAAD Pro Calculator
- Solar Panel Count Calculator
- Solar Plant Earthing Design Calculator
- Solar PV Inter-Row Spacing Calculator
- Solar PV String Sizing Calculator
- Solar PV System Size
- Solar Water Heater
- Solar Water Pump
- Temperature Loss
- Voltage Drop Check
- Wind Load on Module
Other categories
Solar project enquiry · Tamil Nadu & South India
Need solar design or installation?
வீடு, கடை, தொழிற்சாலை அல்லது ground-mounted solar project-க்கு design / installation தேவையா? உங்கள் விவரங்களை அனுப்புங்கள்.
Request system sizing, rooftop layout, SLD, cable sizing, generation study or an installation feasibility discussion. Site visits and installation availability are confirmed after reviewing your location.