Estimate the solar capacity, project price, subsidy and long-term savings for your property using Solar Ace's current calculator inputs and pricing logic.
All calculations from the current Solar Ace report, reorganised for easier comparison.
Cumulative savings using the calculator's current annual-savings method.
Recommended configuration and expected generation.
Compare the current Mono Bifacial and TOPCon configurations.
| System | PV capacity | Panels | Total consumer price |
|---|---|---|---|
| Mono Bifacial540–555 W modules | 2.20 kW | 4 | ₹1,23,500 |
| TOPCon615–625 W modules | 2.48 kW | 4 | ₹1,40,500 |
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Switching to solar is one of the smartest long-term investments for homes and businesses. But before installation, most people have one simple question: “How much will solar cost me and how much can I save every month?”
That’s where the Solar Calculator comes in. This tool helps you estimate system size, cost, monthly savings, subsidy eligibility, and return on investment based on your electricity usage and rooftop area. Whether you need a 2kW system for your home or a 50kW setup for commercial use, the Solar Rooftop Calculator gives instant, accurate projections tailored for Indian consumers.
In this guide, created by Solar Ace Energy, we break down how the Solar Calculator in India works, common examples, real pricing, subsidy details, and ROI calculations so you can make a confident decision about going solar.
With rising electricity tariffs, even a 3kW or 5kW solar plant can drastically reduce monthly bills. Using a Solar Calculator helps you plan financially and understand the long-term benefits before installation.
The Solar Rooftop Calculator uses your inputs to calculate system size and savings. Here’s how it works:
Your electricity bill determines how many units you need to replace with solar.
Each state has different solar policies and subsidy rules.
If you don’t know the area, the Solar Rooftop Calculator estimates based on bill value.
Mono PERC
TopCon
Polycrystalline
The tool shows:
This makes the Solar Calculator one of the fastest ways to estimate solar financials without any technical knowledge.
Most tools use the standard India formula:
The Solar Rooftop Calculator automates this math instantly.
Let’s look at a practical scenario.
Using the Solar Rooftop Calculator:
| Parameter | Result |
|---|---|
| Recommended Capacity | 1.5 kW |
| Monthly Generation | 150–170 units |
| Cost | ₹90,000 – ₹1,20,000 |
| Subsidy | Up to ₹30,000 |
| Net Cost After Subsidy | ₹70,000 – ₹85,000 |
| Payback Period | 3.5 – 4 years |
| 25-Year Savings | ₹4.5 – ₹5.2 Lakhs |
This is exactly the type of clear projection the Solar Rooftop Calculator provides.
Below is the standard price chart used by most calculators in India:
| System Size | Avg Cost (₹) | Monthly Units | Area Needed | Subsidy Eligible? |
|---|---|---|---|---|
| 1 kW | ₹55,000 – ₹80,000 | 100–120 | 100 sq. ft. | Yes |
| 2 kW | ₹1.1L – ₹1.6L | 220–240 | 200 sq. ft. | Yes |
| 3 kW | ₹1.65L – ₹2.4L | 330–360 | 300 sq. ft. | Yes |
| 5 kW | ₹2.75L – ₹3.8L | 500–600 | 500 sq. ft. | Yes |
| 7.5 kW | ₹4.1L – ₹5.6L | 750–900 | 750 sq. ft. | No |
| 10 kW | ₹5.5L – ₹7.2L | 1000–1200 | 1000 sq. ft. | No |
The Solar Rooftop Calculator uses this baseline to estimate costs and units.
| System Size | Annual Savings | 5-Year ROI | 25-Year Lifetime Savings |
|---|---|---|---|
| 1 kW | ₹8,000 – ₹10,000 | 35–40% | ₹2.5 – ₹3 Lakhs |
| 3 kW | ₹24,000 – ₹30,000 | 40–45% | ₹6 – ₹7 Lakhs |
| 5 kW | ₹40,000 – ₹55,000 | 45–50% | ₹12 – ₹14 Lakhs |
| 10 kW | ₹80,000 – ₹1,00,000 | 50–55% | ₹22 – ₹25 Lakhs |
The Solar Rooftop Calculator shows ROI instantly so you understand long-term value.
India offers subsidy under the PM Surya Ghar Yojana.
The Solar Rooftop Calculator includes these subsidy values while estimating cost.
1–2 kW: ₹30,000 per kW
2–3 kW: ₹18,000 per kW
Above 3 kW: No subsidy
For exact updated subsidy values, the page links users to:
👉 External Link: https://www.mnre.gov.in/
(Official MNRE Website)
Avoid manual calculations — the Solar Rooftop Calculator makes it automatic.
Many homeowners oversize or undersize their system.
No more guesswork. You see monthly and lifetime benefits.
The Solar Rooftop Calculator subtracts government subsidy instantly.
Applicable for small rooftops to large industrial sheds.
| Capacity | Minimum Area Required |
|---|---|
| 1 kW | 100 sq. ft. |
| 3 kW | 300 sq. ft. |
| 5 kW | 500 sq. ft. |
| 10 kW | 1000 sq. ft. |
The Solar Rooftop Calculator determines this before installation.
Sunlight hours in your region
Rooftop direction
Shading level
Type of solar panel
Inverter efficiency
Local electricity tariff
Subsidy eligibility
Roof strength and capacity
For businesses, calculations differ because:
High-capacity inverters
Net metering policies
Tariff slabs
ROI expectations
Tax savings under Section 80-IA
Commercial systems often deliver higher ROI, and the Solar Rooftop Calculator adjusts these parameters accordingly.
Homeowners
Housing societies
Schools, colleges
Commercial complexes
Industrial factories
Hospitals & hotels
Warehouses
Anyone planning solar installation can benefit from the Solar Rooftop Calculator.
Solar Ace Energy offers a powerful, user-friendly Solar Rooftop Calculator designed specifically for Indian conditions.
It includes state-wise policies, panel types, ROI models, and real-time pricing.
Using this calculator ensures you get accurate, region-specific insights before installation.
A Solar Calculator estimates system size, cost, subsidy, units generated, and ROI based on your electricity usage and rooftop area.
It uses standard Indian solar generation formulas, local tariffs, and subsidy updates, making it up to 90% accurate.
A 3kW system costs ₹1.65L–₹2.4L depending on panel type and installation location.
Yes, it calculates subsidy based on the latest MNRE guidelines and state policies.
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