How accurate is the solar savings calculator?

The calculator provides indicative estimates based on South India average solar irradiance (5.2 kWh/m²/day), a performance ratio of 78%, and current DISCOM tariff rates for Telangana, AP and Karnataka. Actual savings depend on roof orientation, shading, and your exact tariff slab. ARIA Green Energy provides a precise site-specific proposal after a free on-site audit.

What is the payback period for solar in Hyderabad?

For commercial and industrial customers in Hyderabad (TSSPDCL area), the typical solar payback period is 3.5 to 5.5 years depending on system size, panel type, and monthly electricity bill. With GST Input Tax Credit and accelerated depreciation (40% in Year 1 under Section 32), the effective payback can reduce to 2.8–4 years.

How many square feet does 1 kW of solar need?

Approximately 47–54 square feet per kW depending on panel efficiency. Standard mono-PERC panels (20% efficiency) need about 54 sq ft/kW. Bifacial panels (23% efficiency) need about 47 sq ft/kW. Premium panels (24%+) need approximately 45 sq ft/kW.

What is the cost of rooftop solar per kW in Hyderabad in 2026?

All-inclusive rooftop solar installation cost in Hyderabad ranges from ₹38–48 per watt (₹38–48 lakhs per MW) in 2026, depending on panel efficiency tier and system size. This includes panels, inverters, mounting structure, DC/AC cabling, net metering, and commissioning.

Solar ROI Calculator — Free Solar Savings Estimator for Commercial & Industrial

⚡ Interactive ROI Calculator

Enter your details — results update instantly

Based on South India (Telangana/AP) solar irradiance, TSSPDCL/APEPDCL tariff rates, and real project data from ARIA Green Energy installations.

Your Facility Details

Sector / Organisation Type

State / DISCOM

Monthly Electricity Bill ₹3,00,000

₹50K₹20L

Available Rooftop Area 5,000 sq ft

500 sq ft1 lakh sq ft

Panel Efficiency Tier Bifacial (23%)

Standard (20%)Bifacial (23%)Premium (24%+)

Include Battery Storage (BESS)? No BESS

No BESS50 kWh200 kWh

Financial Incentives

GST Input Tax Credit

For GST-registered businesses — reduces net system cost

Accelerated Depreciation — Section 32 (40%)

For companies in 30% tax bracket — additional effective cost reduction in Year 1

Include O&M / AMC Cost

Deducts ₹0.45/Wp/year O&M cost from net savings — for a realistic lifetime ROI view

⚠ This calculator provides indicative estimates only, based on South India averages. Actual savings depend on your tariff slab, roof orientation, shading, and consumption pattern. We will provide a precise proposal after a free site audit.

Your Estimated Results

Recommended System Size

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Based on your bill and roof area

Estimated Annual Solar Generation

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kWh per year

Estimated Annual Savings

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At current DISCOM tariff

Estimated System Cost (Gross)

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Before tax incentives

Net Cost After Incentives

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Incentives applied

Payback — Gross / After Incentives

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Years

25-Year Cumulative Net Savings

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Net of system cost, assuming 5% annual tariff increase

Annual CO₂ Offset

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Tonnes of CO₂ per year

Get a Precise Site-Specific Proposal →

Calculator Assumptions

Solar Irradiance

South India average: 5.2 kWh/m²/day. Based on MNRE solar radiation atlas for Hyderabad/Deccan region.

System Performance

Performance Ratio (PR) of 78% assumed. Degradation: 0.5%/year for bifacial mono-PERC panels.

Tariff Escalation

5% annual increase in DISCOM tariff assumed for 25-year savings projection — conservative vs historical 8% average.

System Cost

₹38–48 per watt all-inclusive (2026 market rate). BESS at ₹35–42 per kWh. Includes installation, commissioning, net metering.

CO₂ Emission Factor

0.82 kg CO₂ per kWh (CEA national grid emission factor, 2024). Used for carbon offset calculation.

Space per kW

Approximately 80–100 sq ft per kW for mono-PERC panels at 20–25° tilt. Shading and obstruction not accounted for.

Solar Savings Calculator