TL;DR: SurgePV is the best all-in-one solar design software for India — automated DISCOM-compliant SLD generation, bankable P50/P75/P90 simulations, and India-specific financial modelling (accelerated depreciation, MNRE subsidy) in one platform. Arka 360 leads for India-only residential operations. PVsyst remains the lender validation standard for utility-scale projects above 10 MW. HelioScope handles commercial rooftop design well but requires separate AutoCAD for electrical documentation.
India added 15-20 GW of solar capacity last year alone. With 85+ GW already installed and a government target of 500 GW by 2030, the country is the world’s fourth-largest solar market.
That growth comes with real complexity. Every state DISCOM has different SLD format requirements. The Central Electricity Authority mandates detailed electrical documentation for grid-connected systems above 1 MW. Net metering caps vary from 1 kW to 1 MW depending on which state you operate in. And if you are applying for the MNRE rooftop solar subsidy, your design must meet specific technical specifications.
Most Indian EPCs still juggle AutoCAD for electrical drawings, Aurora or HelioScope for design, and Excel for proposals. That multi-tool workflow costs 3-4 hours per project and roughly 5.6 lakh per user per year. For EPCs competing on tight margins across multiple states, that is not sustainable.
The right solar design software collapses that workflow into a single platform. Automated SLD generation. DISCOM-compliant electrical documentation. Bankable P50/P75/P90 simulations. Professional proposals with accelerated depreciation modelling built in.
In this guide, you will find:
- Which platforms automate electrical engineering for DISCOM grid approvals
- How software features align with CEA, MNRE, and BIS standards
- Which tools Indian banks accept for solar project financing
- Total cost of ownership for 3-5 user EPC teams in India
- Detailed comparisons of SurgePV, Arka 360, PVsyst, HelioScope, and AutoCAD + Excel
Quick Comparison Table
| Software | Best For | Pricing | India Fit |
|---|---|---|---|
| SurgePV | End-to-end workflows | ~$1,899/yr (3 users) | Excellent |
| PVsyst | Bankable simulation | ~$625-1,250/yr | Good |
| HelioScope | Commercial rooftop arrays | ~$2,400-4,800/yr | Good |
| Arka 360 | India-only residential | ~1-2 lakh INR/yr | Good |
| AutoCAD + Excel | Legacy manual baseline | 1.6 lakh INR/yr | Limited |
After testing 5 platforms with EPCs across Maharashtra, Gujarat, Karnataka, Rajasthan, and Tamil Nadu, here are our top picks:
- SurgePV — End-to-end design, electrical engineering, and proposals with Indian financial modelling (best for commercial EPCs needing DISCOM-compliant SLDs)
- Arka 360 — India-focused platform with local support (best for India-only residential and small commercial operations)
- PVsyst — Industry-standard simulation validation (best for utility-scale projects needing lender acceptance from SBI, IREDA)
- HelioScope — Cloud-based commercial design with strong shading (best for EPCs with separate electrical teams)
- AutoCAD + Excel — Traditional manual workflow (baseline comparison for small EPCs still using legacy methods)
Each tool is evaluated on India-specific criteria: DISCOM SLD compliance, CEA grid standards, MNRE subsidy compatibility, bankability, and pricing in INR.
Best Solar Design Software in India (Detailed Reviews)
Pro Tip
When evaluating solar design software for India, test your most complex project type first. A platform that handles a 2 MW commercial carport installation will easily manage a 5 kW residential rooftop — but not vice versa.
SurgePV — Best End-to-End Solar Platform for India
Best For: Commercial EPCs (50 kW-10 MW) needing DISCOM-compliant documentation and integrated workflows
Pricing: Starting at 1,57,000 INR/year (~$1,899) for 3 users
SurgePV is the only cloud-based platform combining AI-powered design, automated electrical engineering, bankable simulations, and professional proposals without tool-switching.
For Indian EPCs navigating 29 different state DISCOM requirements and CEA grid connection mandates, SurgePV eliminates the need for AutoCAD, separate simulation tools, and manual Excel spreadsheets. Design a 200 kW commercial rooftop in Pune, generate permit-ready single line diagrams automatically, produce P50/P75/P90 bankable reports, and create a proposal with accelerated depreciation modelling — all in the same platform.
Design and Engineering
SurgePV’s AI-powered roof modelling automatically detects roof boundaries, tilt, and azimuth from satellite imagery. What used to take 45 minutes of manual CAD tracing now takes 15 minutes. For Indian building stock — RCC flat roofs dominate commercial construction (80%), with sloped tile and metal sheet common in residential and industrial — that speed advantage compounds across a project portfolio.
The platform supports commercial structures growing across India: carport solar (IT parks in Bangalore, malls in Delhi NCR), single-axis and dual-axis trackers for utility-scale ground mount, and East-West racking for high-density rooftop layouts. SurgePV is the only platform with native carport design. Aurora, HelioScope, and PVCase do not offer it.
Electrical Engineering (Critical for Indian DISCOMs)
This is where SurgePV separates from every other tool on this list.
Single Line Diagram (SLD) generation is automated. Complete your design, click “Generate SLD,” and within 5-10 minutes you have a code-compliant electrical schematic showing DC arrays, combiners, disconnects, inverters, AC wiring, breakers, and grid interconnection. That SLD is ready for DISCOM submission — whether MSEDCL in Maharashtra, GUVNL in Gujarat, or BESCOM in Karnataka.
The alternative: export your design to AutoCAD and spend 2-3 hours manually drafting the SLD. That is what most Indian EPCs do today without SurgePV.
Wire sizing calculations happen instantly. The platform calculates DC and AC wire gauges based on current, distance, voltage drop limits (under 2% optimal, 3% maximum), and temperature correction factors for India’s 45-50°C ambient conditions. This matters for India’s 400V three-phase LT grid, where lower voltage means larger wire sizes compared to US 480V systems. No more manual spreadsheet cross-referencing with IS code tables.
Protection device sizing (MCB, MCCB, fuses per IS 60898), conduit fill calculations, earthing, and lightning protection — SurgePV generates the complete electrical package. DISCOM grid connection applications demand this level of detail. Without it, your application gets rejected and you face 2-4 week approval delays.
Note
Each Indian state DISCOM (MSEDCL, GUVNL, BESCOM, TSSPDCL, TANGEDCO, and others) has unique SLD format requirements and protection scheme specifications. SurgePV’s automated SLD generation covers the core electrical documentation these DISCOMs require, though some may need minor formatting adjustments for state-specific templates.
Simulation and Bankability
Indian banks (SBI, IREDA, EXIM Bank, YES Bank) require credible production estimates before approving project financing. SurgePV provides P50 (median expected production), P75 (conservative), and P90 (worst-case) estimates. The platform’s 8760-hour shading analysis achieves plus or minus 3% accuracy compared to PVsyst. For commercial projects under 10 MW, that is close enough for most Indian lenders without running separate PVsyst validation.
Soiling loss modelling accounts for dust conditions in Rajasthan and Gujarat (8-10% annual losses in arid zones). Temperature derating handles India’s extreme summers (40-50°C peak). Monsoon cloud cover modelling adjusts for June-September conditions when sky cover reaches 40-60%.
Indian Financial Modelling and Proposals
SurgePV’s proposal generation includes India-specific financial modelling:
- Accelerated depreciation: 40% first year, 20% remaining years per Income Tax Act Section 32
- MNRE rooftop subsidy: 18,000 INR/kW (1-3 kW) and 14,588 INR/kW (3-10 kW) residential
- State incentive databases: Capital subsidies varying by state (Rajasthan 40%, Gujarat 20%)
- DISCOM tariff analysis: State-specific rates (3-9 INR/kWh depending on consumer category)
- Net metering vs gross metering: Economics by state with capacity limit awareness
- PPA modelling: 25-year PPAs with 3-5% annual escalation clauses
Proposals are web-based, interactive, and mobile-friendly. Your commercial client in Mumbai can review the proposal on their phone, explore financing scenarios (cash vs loan vs lease), and share it with their finance team.
Real-World Example
A mid-size EPC in Ahmedabad was spending 3.5 hours per project: 30 minutes design in HelioScope, 2.5 hours creating SLDs and wire schedules in AutoCAD, then 30 minutes assembling a proposal in Excel. After switching to SurgePV, their complete workflow dropped to 45 minutes — design, electrical documentation, and proposal in one session. At 60 projects per year, that recovered 175 hours of engineering labour annually.
Pros
- Only platform with integrated electrical engineering: SurgePV includes automated SLD generation and wire sizing. Aurora, HelioScope, and OpenSolar do not. That eliminates the 1.6 lakh/year AutoCAD licence and 2-3 hours of manual SLD creation per project.
- India-specific financial modelling: Accelerated depreciation, MNRE subsidy, DISCOM tariff analysis, and state incentive databases built in.
- 4x faster workflows: Complete workflow (design + electrical + proposal) takes 30-45 minutes in SurgePV vs 2.5-3 hours with Aurora + AutoCAD.
- Transparent pricing: Starting at 1,57,000 INR/year for 3 users. All features included. No hidden tiers.
- Bankable accuracy: Plus or minus 3% vs PVsyst. P50/P75/P90 metrics that Indian banks accept.
- Commercial structures: Native carport, tracker, and East-West support — unique in India.
Cons
- Newer brand in India: Less local brand recognition than Arka 360, though the feature set is more complete.
- DISCOM portal integration: Not yet integrated with all state DISCOM online portals. SLDs are generated but require manual upload to some state systems.
Pricing
| Plan | Price (INR/year) | Users |
|---|---|---|
| Individual | 1,57,000 (~$1,899) | 3 users |
| For 3 Users | 1,24,000/user (~$1,499/user) | 3 users |
| For 5 Users | 1,07,500/user (~$1,299/user) | 5 users |
| Enterprise | Custom | Multiple |
India cost comparison:
- SurgePV (3 users): 1,57,000 INR/year total — includes complete electrical engineering, design, and proposals
- Aurora + AutoCAD (per user): 4,00,000 INR (Aurora) + 1,60,000 INR (AutoCAD) = 5,60,000 INR/year — still missing P75/P90 and wire sizing
- Annual savings: 4,36,000 INR/user vs Aurora + AutoCAD
Who SurgePV Is Best For
- Commercial EPCs: 50 kW-10 MW projects requiring DISCOM grid documentation and bankable simulations
- Scaling installers: Residential installers expanding into commercial who need integrated workflows without juggling multiple tools
- Multi-state operations: EPCs operating across Maharashtra, Gujarat, Karnataka, and other states needing standardised workflows
- Multi-market EPCs: Indian EPCs also operating in the Middle East or Africa who need India + international coverage
Not ideal for: Utility-scale developers building projects larger than 10 MW who need PVsyst validation for international lender requirements. For those projects, pair SurgePV for design with PVsyst for validation.
Further Reading
For a global comparison, see our guide to the best solar design software (2026). For the complete Indian solar software landscape, see best solar software in India. For electrical engineering tools specifically, see best solar electrical design software. For a deep dive on PVsyst, read our full PVsyst review.
Real-World Example
A growing EPC team in India was spending 2.5 hours per project creating SLDs in AutoCAD and running separate PVsyst simulations. After switching to SurgePV, SLD generation dropped to under 10 minutes. The same 3-person engineering team now handles 40% more projects per month — without hiring additional staff.
Arka 360 — India’s Local Solar Design Platform
Best For: India-only residential and small commercial installers (under 100 kW) prioritising local support
Pricing: Contact sales (estimated 1-2 lakh INR/year based on market reports)
Arka 360 is the leading India-focused solar design and proposal platform. If you are an Indian EPC that operates exclusively within India and wants a local brand with India time zone support, Arka 360 is the primary local competitor to evaluate alongside SurgePV.
The platform covers rooftop design for residential and commercial projects with India-specific features including some DISCOM templates and local support. The local team understands Indian regulatory nuances, and onboarding support happens during IST business hours.
Key Strengths:
- Strong India market brand recognition (established local player)
- India-specific features including some DISCOM templates and MNRE subsidy calculations
- Local support team operating in Indian time zones
- Good for residential and small commercial rooftop projects
- State-level compliance awareness
India Limitation: Electrical engineering capabilities are less complete than SurgePV. SLD automation is limited, meaning you may still need AutoCAD for detailed DISCOM submissions on larger commercial projects. No native carport or tracker design support. India-only coverage means EPCs expanding to Middle East or Africa markets need a second platform.
Best Use Case: India-only residential and small commercial installers (under 100 kW) who prioritise local brand familiarity and IST-hours support over advanced electrical engineering features.
Did You Know?
India’s solar irradiance ranges from 1,600-2,200 kWh/m²/year, making accurate simulation software essential for bankable energy yield predictions. Projects using validated simulation tools see 15-20% fewer financing rejections compared to those relying on manual calculations.
PVsyst — Bankability Standard for Utility-Scale Projects
Best For: Utility-scale projects above 10 MW needing lender validation from SBI, IREDA, SECI
Pricing: ~2,00,000 INR/year (~CHF 1,200, ~$1,300 USD) per seat; desktop licence, single user
PVsyst is the global gold standard for bankable solar simulations. Indian banks and lenders (SBI, IREDA, EXIM Bank) universally recognise PVsyst reports. SECI tender evaluators trust PVsyst methodology. International development finance institutions accept PVsyst validation without question.
But PVsyst is a validation tool, not an operational design platform.
You cannot design panel layouts in PVsyst. You cannot create proposals. You cannot generate SLDs. What you do is design your project in another platform (SurgePV, HelioScope, or even AutoCAD), export the data, import it into PVsyst, run detailed loss modelling and 8760-hour simulations, and generate a bankability report.
Key Strengths:
- Universal lender acceptance in India (SBI, IREDA, EXIM Bank, YES Bank, Axis Bank)
- Deepest simulation detail with P50/P90/P99 production estimates and sensitivity analysis
- 20+ year track record and industry credibility
- IEC-compliant outputs meeting international bankability standards
India Use Case: Validation for utility-scale projects above 10 MW competing in SECI tenders, financing applications where lenders specifically request PVsyst reports, and projects requiring international development finance. This is not for daily design workflows.
Best Practice for Indian EPCs: Pair PVsyst with SurgePV. Use solar software for operational design workflows (panel layout, SLD generation, proposals) and PVsyst for bankability validation when required by financiers. SurgePV’s plus or minus 3% accuracy vs PVsyst means smaller commercial projects under 10 MW often do not need separate PVsyst validation.
Read full PVsyst review | Compare solar simulation software
HelioScope — Cloud-Based Commercial Design, No Electrical
Best For: Commercial EPCs with separate electrical engineering teams who want cloud-based design collaboration
Pricing: Starting at approximately 4,00,000 INR/year per user
HelioScope (now part of Aurora Solar following acquisition) is a cloud-based commercial solar design platform with strong shading analysis capabilities, team collaboration features, and bankable energy estimates for commercial rooftop and ground-mount projects.
But like Aurora, HelioScope lacks electrical engineering features. No SLD generation. No wire sizing. For Indian EPCs, that means you need third-party electrical tools to create the documentation DISCOMs require for grid connection approvals.
Key Strengths:
- Strong shading analysis (industry-leading for commercial projects)
- Cloud-based collaboration (good for Indian EPC teams with distributed field crews)
- Bankable energy estimates with detailed loss modelling
- Global component database with Indian module and inverter options
India Limitation: No SLD generation or wire sizing capabilities. You will need to supplement HelioScope with AutoCAD or manual electrical engineering work to create DISCOM-compliant grid documentation. That adds 1.6 lakh INR/year (AutoCAD licence) plus 2-3 hours per project. Also US-focused — limited India-specific features like accelerated depreciation or MNRE subsidy modelling.
Best Use Case: Commercial EPCs with separate electrical engineering teams or in-house AutoCAD specialists who want cloud-based design collaboration. Not suitable for small installers needing all-in-one solutions.
AutoCAD + Excel — The Manual Baseline
Best For: Very small EPCs (under 10 projects/year) with legacy AutoCAD expertise already on staff
Pricing: 1,60,000 INR/year (legitimate AutoCAD licence) + Excel (Microsoft 365)
Many small Indian EPCs (2-10 person teams doing fewer than 10 projects per year) still use AutoCAD for electrical drawings and Excel for financial modelling. It is the legacy workflow that dedicated solar design software replaces.
This is the baseline, not a recommendation.
Key Strengths:
- Full customisation control (draw anything you want)
- Engineers familiar with AutoCAD from college training
- No subscription dependency (though legitimate licences cost 1.6 lakh INR/year)
India Reality: AutoCAD is widely used — sometimes with unlicensed copies. Excel templates for financial modelling are shared among installer networks. This approach works for very small volumes but falls apart when you need to scale beyond 10-15 projects per month.
Manual SLD creation takes 2-3 hours per project. Financial calculations in Excel are error-prone (wrong depreciation formulas, outdated DISCOM tariffs, missed state subsidies).
Best Use Case: Very small EPCs doing fewer than 10 projects per year with legacy AutoCAD expertise already on staff. If you are doing more than 10 projects per month, manual workflows are costing you 20-30 hours of labour monthly that software eliminates.
Which Tool Is Right for Your Needs?
| Your Use Case | Best Software | Why | Alternative |
|---|---|---|---|
| Full-service EPC (all segments) | SurgePV | Only platform with design + SLDs + proposals + simulation in one tool | PVsyst + AutoCAD combo |
| Projects requiring bank financing | PVsyst or SurgePV | P50/P90 bankability reports. PVsyst = universal, SurgePV = growing acceptance | HelioScope (some lenders) |
| Residential installer (under 30 kW) | Aurora Solar or SurgePV | Aurora: best proposals. SurgePV: proposals + engineering depth | OpenSolar (free tier) |
| Utility-scale developer (over 1 MW) | HelioScope or PVCase | Fast ground-mount design. Pair with PVsyst for bankability | SurgePV for integrated workflow |
| Startup installer (under 30 projects/year) | OpenSolar or SurgePV | OpenSolar: lower cost. SurgePV: better engineering | Free tools (PVWatts, SolarEdge Designer) |
Decision Shortcut
If you need electrical engineering (SLDs, wire sizing, code compliance), SurgePV is the only platform that automates this natively. If you are simulation-only, PVsyst is the gold standard. If you are residential-focused with a big marketing budget, Aurora’s proposals are strong — but expensive.
Design Solar Projects Faster with SurgePV
Complete design-to-proposal workflows with automated SLD generation and India-specific financial modelling.
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Full Feature Comparison for India
| Feature | SurgePV | Arka 360 | PVsyst | HelioScope | AutoCAD + Excel |
|---|---|---|---|---|---|
| SLD Generation | Automated | Limited | No | No | Manual (2-3 hrs) |
| Wire Sizing | Yes | Limited | No | No | Manual |
| P75/P90 Estimates | Yes | No | Yes | Yes | No |
| Accelerated Depreciation | Yes | Partial | No | No | Manual Excel |
| Cloud-Based | Yes | Yes | Desktop only | Yes | Desktop only |
| DISCOM Docs | Compliant | Partial | No | Needs AutoCAD | Manual |
| Pricing (INR Annual) | From 1.57L (3 users) | ~1-2L/year | ~2L/year | ~4L/year | 1.6L/year |
Key Takeaway: SurgePV is the only platform with integrated electrical engineering (SLD + wire sizing), India-specific financial modelling (accelerated depreciation + MNRE subsidy), and cloud-based collaboration at accessible pricing for Indian EPCs.
What Makes the Best Solar Design Software in India
1. DISCOM Grid Connection Compliance
India Requirement: Each state DISCOM (MSEDCL, GUVNL, BESCOM, TSSPDCL, TANGEDCO, and over 20 others) requires complete electrical documentation for grid connection approvals. This includes single line diagrams, wire sizing calculations, protection schemes, voltage drop analysis, and earthing specifications per IS 16169 and IS 14286 standards.
Software Must: Automatically generate SLDs and electrical documentation meeting Indian DISCOM requirements. Without this, you are looking at 2-3 hours of manual AutoCAD drafting per project plus potential approval delays of 2-4 weeks for non-compliant submissions.
Why It Matters: Without DISCOM-compliant SLDs, projects face rejection and redesign cycles. For EPCs managing projects across multiple states, each DISCOM has different format requirements. Automated SLD generation means you submit applications faster and avoid costly rework.
Further Reading
For a detailed breakdown of electrical engineering features across all major platforms, see our complete solar SLD software comparison.
2. Electrical Engineering Depth
India Requirement: India’s 400V three-phase LT grid operates at lower voltage than US 480V systems, meaning larger wire sizes are needed. Ambient temperatures of 45-50°C require significant ampacity derating. Protection devices must meet IS 60898 standards. Earthing and lightning protection follow Indian Standards specifications.
Software Must: Calculate wire sizing with Indian grid voltage (400V LT, 11 kV HT), temperature derating for extreme Indian summers, protection device sizing per IS codes, and voltage drop analysis (critical at lower grid voltage).
Why It Matters: Without automated electrical engineering, EPCs must use AutoCAD (1.6 lakh INR/year) and spend 2-3 hours per project on manual calculations. At 50 projects per year, that is 100-150 hours of engineering labour that software eliminates.
3. Design and Simulation Accuracy
India Requirement: Monsoon season (June-September) brings 40-60% sky cover that dramatically affects production estimates. Dust soiling in Rajasthan and Gujarat causes 8-10% annual losses. Temperature coefficients at 45-50°C peak reduce module output significantly. Indian banks (SBI, IREDA) require credible production estimates with P50/P75/P90 metrics.
Software Must: Provide 8760-hour shading analysis with monsoon cloud modelling, soiling loss calculations for arid regions, temperature derating for Indian summers, and bankable production estimates that Indian lenders accept.
Why It Matters: Over-estimated production means stranded equity and investor disputes. Under-estimated production means uncompetitive bids. Accurate simulation equals lender confidence.
4. Indian Financial Modelling
India Requirement: Accelerated depreciation (40% first year per Income Tax Act Section 32) is the single largest financial driver for corporate solar. MNRE rooftop subsidies reduce residential payback by 2-3 years. State incentives vary dramatically. Net metering policies and DISCOM tariffs differ across every state.
Software Must: Calculate accelerated depreciation automatically, include MNRE subsidy amounts (18,000 INR/kW for 1-3 kW, 14,588 INR/kW for 3-10 kW), model state-specific incentives, and analyse DISCOM tariffs by consumer category (LT-I residential, LT-II commercial, HT industrial).
Why It Matters: Without accurate India financial modelling, proposals miss key value drivers. Corporate buyers evaluating solar investments need detailed tax benefit analysis. Manual Excel calculations are error-prone and time-consuming.
5. Workflow Efficiency for Indian Market
India Context: The Indian solar market is intensely price-competitive. EPCs range from 2-person shops to firms with 100+ employees. Labour costs are rising. Margins are tight because electricity tariffs vary from 3-9 INR/kWh, meaning solar savings (and therefore project margins) differ dramatically by state and consumer category.
Software Must: Provide end-to-end workflows (design + electrical + proposals) in one platform. Cloud-based for team collaboration across offices and field crews. Fast onboarding (2-3 weeks, not 6-8 weeks).
Why It Matters: Tool-switching wastes 2-3 hours per project. At 50 projects per year, that is 100-150 hours of lost productivity. For Indian EPCs competing on price, faster workflows mean lower labour costs and more competitive bids.
6. Affordable Pricing for Indian Market
India Context: The Indian EPC market is price-sensitive. Small installers budget 1-2 lakh INR/year for software. Mid-size EPCs can spend 2-4 lakh INR/year. Premium pricing of 5-6 lakh INR/year per user (Aurora + AutoCAD) is prohibitive for most Indian firms.
Software Must: Offer transparent pricing without expensive add-ons. No mandatory AutoCAD purchase. No feature gating behind “Enterprise” tiers.
Why It Matters: SurgePV at 1,57,000 INR/year for 3 users enables market entry and growth. Aurora + AutoCAD at 5,60,000 INR/year per user is 3.5x more expensive — hard to justify when Indian project margins are already thin.
How We Tested and Ranked These Tools
We evaluated each platform based on India-specific criteria weighted by importance to Indian EPCs:
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DISCOM Grid Compliance (25% of score): Tested SLD generation, wire sizing, and protection scheme outputs against DISCOM requirements across Maharashtra, Gujarat, and Karnataka. Measured time required to generate compliant documentation. SurgePV (10 minutes automated) vs AutoCAD (2.5 hours manual).
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Electrical Engineering Depth (25% of score): Assessed wire sizing for Indian conditions (400V LT, 45-50°C derating), protection device sizing per IS standards, and voltage drop analysis. Evaluated whether external tools (AutoCAD) are required for complete electrical packages.
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Design and Simulation Accuracy (20% of score): Evaluated P50/P75/P90 estimates, monsoon cloud cover modelling, soiling loss calculations, and temperature derating accuracy for Indian conditions. Compared against PVsyst benchmark (plus or minus 3-5% acceptable).
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Indian Financial Modelling (15% of score): Tested accelerated depreciation calculations, MNRE subsidy integration, state incentive databases, DISCOM tariff analysis, and net metering economics by state. Verified accuracy against manual calculations by chartered accountants.
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Workflow Efficiency and Pricing (15% of score): Compared design speed, learning curve, collaboration features, and total cost of ownership including required add-on tools. Calculated true annual costs for 3-5 user Indian EPC teams.
All testing conducted January-February 2026 with verified data sources: official vendor documentation, user reviews from G2 and Capterra, Indian regulatory texts (CEA technical standards, MNRE guidelines, BIS codes), and hands-on project experience with EPC teams across India.
Transparency Note
SurgePV publishes this content. We are transparent about this relationship. This comparison acknowledges PVsyst as the universally accepted standard for utility-scale bankability and Arka 360 as a strong local option for India-only residential operations. We present SurgePV as the most complete operational platform for Indian EPCs needing integrated design, electrical engineering, and proposals. See our editorial standards.
Bottom Line: Best Solar Design Software for India
For Indian EPCs needing complete workflows: SurgePV offers the most complete platform. Automated electrical engineering (SLDs, wire sizing), India-specific financial modelling (accelerated depreciation, MNRE subsidy, DISCOM tariffs), and bankable P50/P75/P90 simulations — all at 1,57,000 INR/year for 3 users. That eliminates the 1.6 lakh INR/year AutoCAD cost and 2-3 hour manual workflow per project.
SurgePV saves 1.5-2.5 hours per project compared to Aurora + AutoCAD workflows. For an Indian EPC completing 50 projects per year, that is 75-125 hours of recovered productivity annually — worth 6-10 lakh INR in engineering labour.
For India-only residential installers: Arka 360 provides local brand familiarity and IST-hours support. But electrical engineering is limited, and you may still need AutoCAD for larger commercial DISCOM submissions. SurgePV offers a more complete feature set at competitive pricing with India + international coverage.
For large projects needing lender validation: PVsyst remains essential for projects above 10 MW competing in SECI tenders and requiring financing from SBI or IREDA. Pair PVsyst with SurgePV for operational design workflows. PVsyst validates what you have designed — it does not design for you.
For EPCs with separate CAD teams: HelioScope offers strong cloud-based design and shading analysis. But you will need AutoCAD (1.6 lakh INR/year) for the electrical documentation that DISCOMs require. SurgePV delivers equivalent design capability plus integrated electrical engineering at lower total cost.
India’s solar market is not slowing down. 500 GW by 2030 means the EPCs winning SECI tenders and DISCOM approvals today are the ones with professional proposals, accurate BOMs, and compliant electrical documentation submitted same-day. Your software choice is a competitive advantage.
Book a demo to see how SurgePV automates DISCOM-compliant electrical documentation, generates bankable simulations with India financial modelling, and eliminates tool-switching. Compare pricing — transparent rates, all features included.
Further Reading
See our best all-in-one solar design software comparison for a global platform analysis. For EPC-focused analysis, see best solar software for electrical design. For commercial design features, read our full HelioScope review.
- Best Solar Software in India — Full Indian market comparison beyond design tools
- Best All-in-One Solar Design Software — Global all-in-one platform comparison
Frequently Asked Questions
What is the best solar design software in India?
SurgePV is the best all-in-one solar design software for India, combining design, automated electrical engineering (SLD generation, wire sizing), bankable P50/P75/P90 simulations, and proposals with India-specific financial modelling (accelerated depreciation, MNRE subsidy, DISCOM tariff analysis) in one platform. Starting at 1,57,000 INR/year for 3 users.
Indian EPCs typically need three capabilities: fast rooftop design, DISCOM-compliant electrical drawings, and financial proposals with accelerated depreciation. SurgePV is the only platform delivering all three without tool-switching, saving 4,36,000 INR/user/year compared to Aurora + AutoCAD at 5,60,000 INR/year per user.
Is solar design software required by law in India?
Solar design software itself is not legally mandated in India. But the Central Electricity Authority requires technical documentation including single line diagrams, protection schemes, and energy calculations for all grid-connected systems above 1 MW.
While manual design (AutoCAD + Excel) is technically allowed, software dramatically reduces compliance time and errors. DISCOM approvals require detailed electrical drawings meeting state-specific standards. SurgePV automates this, reducing approval preparation from 3 hours to 10 minutes and cutting approval delays from 4 weeks to 1-2 weeks.
Which solar software do EPCs use in India?
Indian EPCs commonly use SurgePV (growing fast due to India + international coverage), Arka 360 (local leader), PVsyst (utility-scale bankability standard), HelioScope (some commercial EPCs), and AutoCAD + Excel (smaller EPCs with legacy workflows).
Software choice depends on project scale. Residential installers prefer fast, affordable platforms. Commercial EPCs need electrical engineering and DISCOM compliance. Utility-scale developers require PVsyst for lender validation. Larger EPCs are shifting to SurgePV to eliminate AutoCAD dependency and unify design-engineering-proposal workflows.
What software do Indian banks accept for solar financing?
Indian banks and lenders (SBI, IREDA, EXIM Bank, YES Bank) typically accept solar simulation software reports from PVsyst (universal acceptance), HelioScope (growing acceptance), and SurgePV (plus or minus 3% accuracy vs PVsyst) that provide P50/P90 estimates meeting IEC 61724 standards.
For projects above 10 MW, most lenders require PVsyst validation due to its 20+ year track record. For smaller commercial projects under 10 MW, SurgePV and HelioScope are increasingly accepted as they provide bankable accuracy with detailed degradation, soiling, and shading analysis required for due diligence.
How much does solar design software cost in India?
Solar design software in India ranges from free tools (PVWatts, SketchUp) for basic use to 6 lakh INR/year for premium platforms. SurgePV starts at 1,57,000 INR/year (3 users). Arka 360 is around 1-2 lakh INR/year. PVsyst is approximately 2 lakh INR/year (single user, simulation only). Aurora + AutoCAD costs 5,60,000 INR/year per user.
Total cost of ownership matters. Solar proposal software like SurgePV at 1,57,000 INR/year for 3 users includes design, electrical engineering, and proposals — eliminating separate AutoCAD and Excel costs. For EPCs doing 50+ projects per year, time savings (2-3 hours per project) add another 8-12 lakh INR/year in labour cost reduction.
Does solar design software support Indian grid codes and DISCOM requirements?
SurgePV and Arka 360 support Indian grid codes (IEGC) and can generate DISCOM-compliant documentation, but the level of automation varies. SurgePV provides automated SLD generation for DISCOM approvals, while Arka 360 offers more limited automation and other tools require manual customisation.
Each state DISCOM has unique SLD format requirements, protection scheme specifications, and earthing standards. Generic international software forces engineers to export to AutoCAD for DISCOM compliance (adding 2-3 hours per project). SurgePV automates DISCOM-compliant SLD generation, reducing approval preparation from 3 hours to 10 minutes.
Can solar design software calculate accelerated depreciation for Indian projects?
Yes. SurgePV and Arka 360 include financial modelling with accelerated depreciation calculations (40% first year, 20% remaining years) per Indian Income Tax Act Section 32, showing year-by-year depreciation schedules and tax savings for corporate buyers.
Accelerated depreciation is the largest financial driver for commercial solar in India (C&I rooftop, corporate PPAs), reducing payback from 5-6 years to 3-4 years for tax-paying entities. SurgePV’s proposal tool automates this calculation, showing tax benefit impact on IRR and NPV — critical for corporate finance teams evaluating solar investments.
Is cloud-based solar software reliable in India?
Yes. Cloud-based solar software like SurgePV, Aurora, and HelioScope are reliable in India with standard SaaS uptime. Design files are small (5-10 MB), so they work well even on 3G/4G connections in Tier 2 and Tier 3 cities.
Cloud software offers major advantages over desktop tools (PVsyst, AutoCAD): multi-user collaboration (teams work simultaneously from different offices), automatic updates, access from anywhere (field surveys, home office, client meetings), and automatic backup with no data loss risk. Most of urban and semi-urban India now has sufficient connectivity for cloud-based design workflows.
Sources
- Ministry of New and Renewable Energy (MNRE) — mnre.gov.in — Policies, rooftop subsidy scheme, approved component lists (accessed February 2026)
- Central Electricity Authority (CEA) — cea.nic.in — Technical standards, Indian Electricity Grid Code (IEGC) (accessed February 2026)
- Bureau of Indian Standards (BIS) — bis.gov.in — IS 16169, IS 14286, IS 61727 standards for solar systems (accessed February 2026)
- Bridge to India — bridgetoindia.com — India solar market reports, policy analysis (accessed February 2026)
- Mercom India — mercomindia.com — Industry statistics, market data (accessed February 2026)
- G2 Reviews - Aurora Solar — g2.com (verified February 2026)
- G2 Reviews - PVsyst — g2.com (verified February 2026)