Free Consultation Solar Calculator India / Navonax Intelligence
Calculate rooftop solarcost, savings and payback.
A transparent rooftop-solar estimate for Indian homes and businesses—covering system size, subsidy, generation, cash flow, payback and 25-year value.
01 Engineering-led sizing02 Editable assumptions03 Instant financial outlook
Build your estimate
Your roof. Your economics. One clear outlook.
Enter three quick details once. We will identify your state, tailor the solar assumptions and unlock your complete estimate.
02 · Personalised estimateYour results are ready to calculate.
Complete the three quick details above to unlock capacity, savings, subsidy, payback and 25-year value.
Enter my details ↑PIN-powered solar intelligence
Your state will light up here.
India remains neutral grey while the state matched to your PIN is highlighted in Navonax colours.
Selected state Other states and UTs
Solar finance intelligence
Your complete EMI outlook,month by month.
Compare reducing-balance and flat-rate repayment. Select any tenure from one to ten years, then open a year to review all 12 monthly instalments.
Loan calculation type
Loan tenure
YEAR-WISE REPAYMENT SCHEDULE
Open a year to see its 12 monthly EMIs.
Opening balance, principal, interest and closing balance are shown for each month.
YEAR0112-month repayment₹36,534Principal repaid₹25,441Interest paid₹11,093Closing balance₹1,24,709+
| Month | Opening balance | EMI | Principal | Interest | Closing balance |
|---|---|---|---|---|---|
| 01Month | ₹1,50,150 | ₹3,045 | ₹2,044 | ₹1,001 | ₹1,48,106 |
| 02Month | ₹1,48,106 | ₹3,045 | ₹2,057 | ₹987 | ₹1,46,049 |
| 03Month | ₹1,46,049 | ₹3,045 | ₹2,071 | ₹974 | ₹1,43,979 |
| 04Month | ₹1,43,979 | ₹3,045 | ₹2,085 | ₹960 | ₹1,41,894 |
| 05Month | ₹1,41,894 | ₹3,045 | ₹2,099 | ₹946 | ₹1,39,795 |
| 06Month | ₹1,39,795 | ₹3,045 | ₹2,113 | ₹932 | ₹1,37,683 |
| 07Month | ₹1,37,683 | ₹3,045 | ₹2,127 | ₹918 | ₹1,35,556 |
| 08Month | ₹1,35,556 | ₹3,045 | ₹2,141 | ₹904 | ₹1,33,415 |
| 09Month | ₹1,33,415 | ₹3,045 | ₹2,155 | ₹889 | ₹1,31,260 |
| 10Month | ₹1,31,260 | ₹3,045 | ₹2,169 | ₹875 | ₹1,29,091 |
| 11Month | ₹1,29,091 | ₹3,045 | ₹2,184 | ₹861 | ₹1,26,907 |
| 12Month | ₹1,26,907 | ₹3,045 | ₹2,198 | ₹846 | ₹1,24,709 |
YEAR0212-month repayment₹36,534Principal repaid₹27,553Interest paid₹8,981Closing balance₹97,156+
| Month | Opening balance | EMI | Principal | Interest | Closing balance |
|---|---|---|---|---|---|
| 13Month | ₹1,24,709 | ₹3,045 | ₹2,213 | ₹831 | ₹1,22,495 |
| 14Month | ₹1,22,495 | ₹3,045 | ₹2,228 | ₹817 | ₹1,20,268 |
| 15Month | ₹1,20,268 | ₹3,045 | ₹2,243 | ₹802 | ₹1,18,025 |
| 16Month | ₹1,18,025 | ₹3,045 | ₹2,258 | ₹787 | ₹1,15,767 |
| 17Month | ₹1,15,767 | ₹3,045 | ₹2,273 | ₹772 | ₹1,13,494 |
| 18Month | ₹1,13,494 | ₹3,045 | ₹2,288 | ₹757 | ₹1,11,207 |
| 19Month | ₹1,11,207 | ₹3,045 | ₹2,303 | ₹741 | ₹1,08,903 |
| 20Month | ₹1,08,903 | ₹3,045 | ₹2,318 | ₹726 | ₹1,06,585 |
| 21Month | ₹1,06,585 | ₹3,045 | ₹2,334 | ₹711 | ₹1,04,251 |
| 22Month | ₹1,04,251 | ₹3,045 | ₹2,349 | ₹695 | ₹1,01,902 |
| 23Month | ₹1,01,902 | ₹3,045 | ₹2,365 | ₹679 | ₹99,536 |
| 24Month | ₹99,536 | ₹3,045 | ₹2,381 | ₹664 | ₹97,156 |
YEAR0312-month repayment₹36,534Principal repaid₹29,840Interest paid₹6,694Closing balance₹67,316+
| Month | Opening balance | EMI | Principal | Interest | Closing balance |
|---|---|---|---|---|---|
| 25Month | ₹97,156 | ₹3,045 | ₹2,397 | ₹648 | ₹94,759 |
| 26Month | ₹94,759 | ₹3,045 | ₹2,413 | ₹632 | ₹92,346 |
| 27Month | ₹92,346 | ₹3,045 | ₹2,429 | ₹616 | ₹89,917 |
| 28Month | ₹89,917 | ₹3,045 | ₹2,445 | ₹599 | ₹87,472 |
| 29Month | ₹87,472 | ₹3,045 | ₹2,461 | ₹583 | ₹85,011 |
| 30Month | ₹85,011 | ₹3,045 | ₹2,478 | ₹567 | ₹82,533 |
| 31Month | ₹82,533 | ₹3,045 | ₹2,494 | ₹550 | ₹80,039 |
| 32Month | ₹80,039 | ₹3,045 | ₹2,511 | ₹534 | ₹77,528 |
| 33Month | ₹77,528 | ₹3,045 | ₹2,528 | ₹517 | ₹75,000 |
| 34Month | ₹75,000 | ₹3,045 | ₹2,545 | ₹500 | ₹72,456 |
| 35Month | ₹72,456 | ₹3,045 | ₹2,561 | ₹483 | ₹69,894 |
| 36Month | ₹69,894 | ₹3,045 | ₹2,579 | ₹466 | ₹67,316 |
YEAR0412-month repayment₹36,534Principal repaid₹32,317Interest paid₹4,217Closing balance₹34,999+
| Month | Opening balance | EMI | Principal | Interest | Closing balance |
|---|---|---|---|---|---|
| 37Month | ₹67,316 | ₹3,045 | ₹2,596 | ₹449 | ₹64,720 |
| 38Month | ₹64,720 | ₹3,045 | ₹2,613 | ₹431 | ₹62,107 |
| 39Month | ₹62,107 | ₹3,045 | ₹2,630 | ₹414 | ₹59,476 |
| 40Month | ₹59,476 | ₹3,045 | ₹2,648 | ₹397 | ₹56,828 |
| 41Month | ₹56,828 | ₹3,045 | ₹2,666 | ₹379 | ₹54,163 |
| 42Month | ₹54,163 | ₹3,045 | ₹2,683 | ₹361 | ₹51,479 |
| 43Month | ₹51,479 | ₹3,045 | ₹2,701 | ₹343 | ₹48,778 |
| 44Month | ₹48,778 | ₹3,045 | ₹2,719 | ₹325 | ₹46,059 |
| 45Month | ₹46,059 | ₹3,045 | ₹2,737 | ₹307 | ₹43,321 |
| 46Month | ₹43,321 | ₹3,045 | ₹2,756 | ₹289 | ₹40,566 |
| 47Month | ₹40,566 | ₹3,045 | ₹2,774 | ₹270 | ₹37,791 |
| 48Month | ₹37,791 | ₹3,045 | ₹2,793 | ₹252 | ₹34,999 |
YEAR0512-month repayment₹36,534Principal repaid₹34,999Interest paid₹1,535Closing balance₹0+
| Month | Opening balance | EMI | Principal | Interest | Closing balance |
|---|---|---|---|---|---|
| 49Month | ₹34,999 | ₹3,045 | ₹2,811 | ₹233 | ₹32,188 |
| 50Month | ₹32,188 | ₹3,045 | ₹2,830 | ₹215 | ₹29,358 |
| 51Month | ₹29,358 | ₹3,045 | ₹2,849 | ₹196 | ₹26,509 |
| 52Month | ₹26,509 | ₹3,045 | ₹2,868 | ₹177 | ₹23,641 |
| 53Month | ₹23,641 | ₹3,045 | ₹2,887 | ₹158 | ₹20,754 |
| 54Month | ₹20,754 | ₹3,045 | ₹2,906 | ₹138 | ₹17,848 |
| 55Month | ₹17,848 | ₹3,045 | ₹2,926 | ₹119 | ₹14,923 |
| 56Month | ₹14,923 | ₹3,045 | ₹2,945 | ₹99 | ₹11,978 |
| 57Month | ₹11,978 | ₹3,045 | ₹2,965 | ₹80 | ₹9,013 |
| 58Month | ₹9,013 | ₹3,045 | ₹2,984 | ₹60 | ₹6,029 |
| 59Month | ₹6,029 | ₹3,045 | ₹3,004 | ₹40 | ₹3,024 |
| 60Month | ₹3,024 | ₹3,045 | ₹3,024 | ₹20 | ₹0 |
Rooftop solar calculator for India
From PIN code and electricity bill to a practical solar plan.
The Navonax solar calculator combines your location, monthly electricity bill, tariff and usable roof area to estimate a suitable rooftop solar capacity. It then shows indicative project cost, residential subsidy, annual generation, first-year savings, EMI, simple payback and 25-year value.
Location-aware assumptions
A valid six-digit PIN identifies the district and state, highlights the state on the India map and applies an indicative regional generation range.
Residential and business planning
Compare a home, commercial or industrial solar requirement using editable tariff, roof area, shading, system-cost and finance assumptions.
Transparent financial outlook
Review the estimated capital cost, eligible central subsidy, investment after subsidy, annual savings, finance split and lifecycle value.
How the estimate works
Professional enough to plan. Clear enough to trust.
Consumption-led sizing
Your annual bill and tariff are converted into electricity demand, then matched with the solar yield and usable roof area.
Real-world constraints
The recommendation respects roof capacity, shading and a practical self-consumption limit instead of promising impossible savings.
Lifecycle economics
Payback and lifetime value consider tariff growth, panel degradation and annual maintenance—not only first-year savings.
Solar calculator questions
Before you use the estimate.
Clear answers about PIN-code matching, subsidy, accuracy and the next step after calculation.
How does the Navonax solar calculator use my PIN code?
Your PIN code identifies the district and state, highlights that state on the India map and applies an indicative state-level solar-yield range to the estimate.
What details are needed for a rooftop solar estimate?
Start with your name, WhatsApp number and six-digit PIN. You can then adjust your monthly bill, electricity tariff, usable shadow-free roof area and advanced engineering assumptions.
Does the calculator show PM Surya Ghar subsidy?
For residential users it provides an indicative central subsidy estimate based on the selected capacity and region. Final eligibility and amounts remain subject to current government, National Portal and DISCOM rules.
Are solar generation and savings guaranteed?
No. The result is an initial planning estimate. Final capacity, generation, cost and savings depend on a site survey, shadow analysis, sanctioned load, tariff, roof condition, equipment and approvals.
Can Navonax prepare a detailed proposal after calculation?
Yes. Submit your details through the calculator and request a site assessment so the Navonax team can verify the roof, electrical system, consumption and commercial scope.
Results are indicative and not a commercial offer. Final capacity, price, generation, subsidy eligibility and savings depend on site survey, sanctioned load, roof condition, shadow analysis, DISCOM rules, selected equipment and prevailing government guidelines.