Indian EPC founders who discover Aurora Solar through a US-market blog post or a webinar often ask the same question within the first week of trial: where is the DISCOM format? Where is the IS 875 structural module? Where is the CEIG-approved signatory block? The answer, bluntly, is that Aurora Solar was built for the US residential sales-to-permit workflow — and none of those Indian-market requirements exist in its feature set. This article is written for Rohan: the C&I EPC founder running 5–25 MW per year across Maharashtra, Gujarat, Tamil Nadu, or Rajasthan who needs a working alternative, not a sales pitch.
Direct answer. Aurora Solar is not an effective tool for Indian EPC submissions. It does not produce DISCOM-format single-line diagrams, CEIG-approved electrical drawings, IS 875-compliant structural reports, or PVsyst bankable yield reports accepted by IREDA or PFC. The practical alternatives are: (1) PVsyst + AutoCAD + CEIG-approved engineer, (2) a managed engineering service like Heaven Designs that delivers the complete Indian compliance stack, or (3) a hybrid of Helioscope for 3D visualization plus outsourced DISCOM-format CAD drawing.
This article covers why Aurora does not translate to the Indian market, what the actual Indian engineering deliverable stack looks like, which tools and services fill each gap, and a cost comparison that ties directly to your per-project margin.
Why Aurora Solar Does Not Work for Indian DISCOM Submissions
Aurora Solar was designed from the ground up for the US AHJ-submission workflow. Its drawing outputs use US NEC symbology, ANSI title blocks, and US-standard one-line diagram conventions. An Indian DISCOM — whether TANGEDCO in Tamil Nadu, MSEDCL in Maharashtra, UGVCL in Gujarat, or RRVPNL in Rajasthan — requires a completely different format.
The specific gaps for India are:
- No CEIG-format electrical drawings. The CEIG (Chief Electrical Inspector to the Government) requires drawings in IS 16-series symbology with a CEIG-approved engineer’s signature and a state-specific approval number. Aurora produces ANSI one-line diagrams — not IS-format SLDs.
- No IS 875 Part 3 wind load calculations. IS 875 Part 3 is the Indian standard for wind loads on structures. Aurora does not have a structural module aligned to this standard. Aurora’s structural output (where it exists) targets ASCE 7 for the US market.
- No PVsyst simulation. Indian lenders (IREDA, PFC, SBI Capital) and Independent Engineers require a PVsyst simulation report — the .PRJ file and PDF — not Aurora’s in-built energy model. Aurora’s yield estimate is not accepted as a bankable yield report by any major Indian lender.
- No BOQ in MNRE format. The Bill of Quantities for Indian MNRE tenders follows a prescribed format with specific line items for modules, inverters, mounting, cables, protection, earthing, and civil work. Aurora does not produce this format.
- No DISCOM net-metering application support. DISCOM applications in India require specific document packages: technical feasibility report, GA drawing, SLD, module and inverter data sheets, ALMM compliance certificate, metering arrangement drawing, and state-specific forms. Aurora does not generate any of these India-specific documents.
Watch out. Attempting to submit Aurora-generated drawings to an Indian DISCOM will result in automatic rejection. The format, certification block, symbology, and engineer credentials do not meet CEA or CEIG requirements.
According to MNRE’s 2025 rooftop solar guidelines, all grid-connected solar installations above 1 kW require DISCOM approval with drawings certified by a CEIG-approved electrical engineer. This is a regulatory hard gate — no format workaround exists.
The Indian EPC Engineering Deliverable Stack
Before comparing alternatives, it helps to be precise about what a complete Indian EPC engineering package actually contains. Most EPC founders undercount the deliverable list until a DISCOM rejection forces the full audit.
12+
Documents in a typical DISCOM submission
CEA Connectivity Regulations 2019
3–8 weeks
DISCOM approval cycle (first-pass)
Mercom India, 2025
₹55k–₹90k
In-house senior designer monthly CTC
Naukri.com salary index, 2026
42%
DISCOM rejection rate (format errors)
Bridge to India, Q4 2025
The complete Indian C&I rooftop engineering package for DISCOM submission includes:
- General Arrangement (GA) drawing — plan view, elevation, mounting layout
- Single-Line Diagram (SLD) — IS-format with protection relay scheme, CEIG-approved signature
- Metering arrangement drawing — net-meter wiring as per DISCOM specification
- Structural calculation report — IS 875 Part 3 wind load, IS 456 for RCC mounting
- BOQ — MNRE-aligned line-item format with make/model, quantity, specification
- Technical feasibility report — site survey, irradiance, load analysis
- PVsyst simulation report — P50/P90 yield, PR analysis, loss cascade
- ALMM compliance certificate — module must be on MNRE ALMM list
- Module, inverter, structure data sheets — manufacturer-certified
- Earthing and lightning protection drawing — IS 3043 compliant
- State-specific DISCOM application forms — vary by state and DISCOM
No single software tool produces all of these. This is why an engineering service model is often more practical than a software subscription for Indian EPCs.
Aurora Alternatives for Indian EPCs — A Tool Comparison
| Tool / Service | What it does | India DISCOM-ready? | PVsyst bankable? | CEIG drawings? | Cost model |
|---|---|---|---|---|---|
| Aurora Solar | US residential design + proposal | No | No | No | $200–$800/month/user |
| Helioscope | Yield simulation + layout | Partial (yield only) | No (IE requires PVsyst) | No | $125–$375/month/user |
| PVsyst | Bankable yield simulation | Yes (yield only) | Yes | No | ~$1,200/year/license |
| AutoCAD + ETAP | CAD drawing production | Yes (output) | No | Requires CEIG signatory | $1,500–$3,000/year |
| Heaven Designs | Managed full-stack delivery | Yes — all documents | Yes — IE accepted | Yes | Per-project |
The honest answer for Indian EPCs is that no single software tool covers the full stack. The practical paths are:
Path A — Self-managed tool stack: PVsyst (yield) + AutoCAD/ETAP (drawings) + in-house CEIG-approved engineer (signatory). This works for EPCs with 10+ MW/month volume and designer retention above 80%. Total software cost: ₹1.8L–₹2.8L/year. Designer cost: ₹7L–₹14L/year CTC.
Path B — Managed engineering service: Heaven Designs (complete stack delivery). No software license, no headcount. Per-project pricing with a defined deliverable list and revision SLA. Best for EPCs at any volume who want predictable cost per project.
Path C — Hybrid: Helioscope for sales-stage 3D visualization, Heaven Designs for the DISCOM submission stack. The sales team gets the 3D render; the engineering team gets the compliant drawings.
Definition. A managed engineering service delivers the complete document output — drawings, calculations, reports — without requiring the client to manage software licenses, designer hiring, or regulatory knowledge. The client provides site data; the service provides submission-ready deliverables.
The DISCOM Drawing Stack Framework
This is Heaven Designs’ proprietary sequencing model for Indian DISCOM submissions — the five documents that must be prepared in order because each one informs the next.
Site survey and load profile
Capture roof area, orientation, shading obstructions, and 12-month energy bills. This establishes the system size and determines GA layout constraints — without accurate site data, every downstream drawing may need revision.
PVsyst simulation
Run the yield simulation with Meteonorm or Solargis data. Output: P50/P90 annual generation, PR, loss cascade, and specific yield in kWh/kWp. This document goes to the customer for approval and later to the lender as part of the bankable yield report.
General Arrangement drawing
Produce the GA: plan view with module layout, row spacing, setbacks from parapet and equipment, cable tray routes, inverter position, and module string numbering. The GA drives the mounting BOQ and the structural load calculation.
IS-format SLD and CEIG electrical drawing
Produce the single-line diagram in IS 16-series symbology: DC string layout, combiner, inverter, metering point, grid connection, protection relay scheme, earthing. Apply CEIG-approved engineer signature and state-specific certification block. This is the DISCOM gate document — any error here triggers rejection.
BOQ and structural report
Compile the MNRE-format BOQ from the GA and SLD data. Simultaneously produce the IS 875 Part 3 wind load report and IS 456 structural adequacy check for the mounting system. Submit the complete package as a single DISCOM application — partial submissions typically delay the approval cycle by 3–6 weeks.
Cost-Per-Project Analysis — Self-Managed vs Managed Service
The per-project cost comparison is the decision that matters most to an EPC founder. Here is the model for a 100 kW C&I rooftop project in Maharashtra:
| Cost component | Self-managed (tool stack) | Heaven Designs managed |
|---|---|---|
| PVsyst license (annual, amortized per project at 5 projects/month) | ₹2,000 | Included |
| AutoCAD + ETAP license (amortized) | ₹2,500 | Included |
| Senior designer salary (amortized per project) | ₹18,000–₹30,000 | Included |
| CEIG-approved engineer signing fee | ₹5,000–₹12,000 | Included |
| Internal QC and revision cost | ₹3,000–₹8,000 | Included |
| DISCOM rejection resubmission (42% rate) | ₹8,000–₹15,000 (probability-weighted) | Covered by SLA |
| Total per 100 kW project | ₹38,500–₹67,000 | ₹18,000–₹28,000 |
These numbers move significantly based on your team’s efficiency and the state’s DISCOM complexity. Rajasthan (RRVPNL) and Tamil Nadu (TANGEDCO) have historically higher rejection rates due to documentation requirements. Gujarat (UGVCL) is more standardized. Heaven Designs maintains DISCOM-specific format libraries for all major states.
Field tip. Ask any prospective engineering vendor: "What is your DISCOM rejection rate for Tamil Nadu and Maharashtra?" A managed service with state-specific format libraries should quote below 15%. If the vendor cannot answer, they are not tracking it — which means you will absorb the cost of rejections.
Helioscope as an Aurora Alternative — What Actually Works
Helioscope is a better engineering tool than Aurora for the India context — but only on the yield-modeling side. Its simulation engine handles complex rooftop geometries, shade analysis, and string layout more rigorously. For C&I projects where you need to present a compelling yield analysis to the customer before investing in DISCOM drawings, Helioscope is a useful pre-design tool.
What Helioscope cannot do for India:
- Produce DISCOM-format SLDs
- Provide CEIG-approved engineer signatures
- Generate IS 875-compliant structural reports
- Produce PVsyst simulation files accepted by Indian lenders
The practical use case: use Helioscope for the sales-stage 3D visualization and preliminary yield estimate. Then hand the project to Heaven Designs for the DISCOM submission package. The customer sees a polished 3D model during the sales process; you receive a compliant DISCOM-ready drawing set for the submission.
See the PVsyst vs Helioscope comparison for a deeper breakdown of yield simulation accuracy.
HELIOSCOPE FOR INDIA — WORKS
- Sales-stage 3D roof visualization
- Preliminary yield estimate for customer proposal
- Complex shading analysis
- String layout pre-design
HELIOSCOPE FOR INDIA — DOES NOT WORK
- DISCOM SLD submission
- CEIG electrical drawing approval
- Bankable yield for IREDA/PFC
- IS 875 structural compliance
How Heaven Designs Helps Indian EPCs
Heaven Designs was built for exactly the workflow Rohan needs: site data in, compliant submission package out, with no in-house design team required.
- Electrical CEIG Drawings — CEIG-approved electrical drawings for all major Indian state DISCOMs. Signed by licensed engineers with state-specific approval numbers.
- Solar Rooftop Detailed Engineering Design — Complete IFC pack: GA, SLD, structural report, IS 875 wind load calculation, BOQ, module data integration.
- Solar Ground Mount Design — Utility-scale and C&I ground-mount layouts with PVsyst simulation, IS 875 structural, and SECI-tender-compatible BOQ.
- Site Survey & Land Feasibility — Pre-DISCOM feasibility covering irradiance, grid proximity, DISCOM capacity check, and technical viability.
- Download a sample deliverable — See a real DISCOM-format SLD and IS 875 structural report before committing.
Read how to outsource solar design in India for the step-by-step process, and solar engineering for Indian EPCs for the complete workflow guide.
Contact us for a per-project rate sheet for your state and project type.
FAQ
What is the best Aurora Solar alternative for Indian EPCs?
For DISCOM submissions, the best alternative is a combination of PVsyst (bankable yield) + a managed engineering service for CEIG-format drawings and IS 875 structural reports. Heaven Designs delivers this complete stack without requiring the EPC to manage software licenses or hire additional engineers. Aurora Solar itself is not a viable Indian market tool — its format, symbology, and compliance framework are US-specific.
Does any software produce DISCOM-ready drawings automatically?
No single software platform produces ready-to-submit DISCOM drawings. Specialized Indian solar CAD firms and managed services like Heaven Designs maintain DISCOM-specific drawing templates updated to each state’s format requirements. The drawing production requires a CEIG-approved engineer’s physical signature — which is a human credential, not a software output.
How much does it cost to outsource DISCOM drawings in India?
Per-project rates for a complete DISCOM submission package (GA + SLD + BOQ + IS 875 structural + PVsyst report) range from ₹15,000 to ₹45,000 depending on system size and state complexity. This compares favorably to the fully-loaded cost of an in-house senior designer (₹7L–₹14L/year CTC). Read solar designer salary India 2026 for the full cost comparison.
Can I use PVsyst instead of Aurora for Indian projects?
PVsyst handles the yield simulation component — it is the standard tool accepted by Indian lenders and Independent Engineers. But PVsyst does not produce GA drawings, SLDs, BOQs, or structural reports. A complete Indian EPC engineering stack requires PVsyst for yield plus CAD tools and a CEIG-approved engineer for the compliance drawings.
What is the typical DISCOM rejection rate for first-time submissions?
According to Bridge to India’s 2025 rooftop solar report, first-submission DISCOM rejection rates range from 25–55% across major Indian states, with format errors and missing CEIG certification being the primary causes. EPCs with state-specific format libraries and experienced CEIG-approved engineers routinely achieve sub-15% rejection rates.
Is there an alternative to CEIG approval for solar electrical drawings?
No. CEA Connectivity Regulations 2019 and most state electricity acts require that electrical drawings for grid-connected solar installations be certified by a CEIG-approved electrical engineer. There is no bypass for this requirement. An uncertified drawing set will be rejected at the DISCOM stage regardless of the technical quality of the design.
How does the Heaven Designs white-label model work for Indian EPCs?
All drawings are produced with the EPC’s company name, logo, and address block on the title block. The CEIG-approved engineer’s credentials appear as the certifying engineer, but the commercial presentation to the end customer is entirely under the EPC’s brand. This is the standard model for subcontracted engineering services in the Indian solar market. See white-label solar design services for a detailed explanation.
