Solar Design Software in India 2026: 7 Tools Ranked for EPCs

Indian solar EPCs operate inside a design-tool reality no global vendor was designed for. The DISCOM in Maharashtra wants a different drawing format from the DISCOM in Tamil Nadu. The CEIG in Karnataka rejects a layout that the CEIG in Gujarat approves on first submission. The PM Suryaghar subsidy paperwork has its own auto-calc requirements that change quarterly. And the SECI auction bid math runs on per-MW pricing that an Aurora license priced in US dollars cannot model without a manual override on every cell. The seven platforms ranked below are the ones that hold up across this reality, on the dimensions an Indian EPC operations head actually measures.

Direct answer. The best solar design software in India for 2026 is SurgePV (best all-in-one cloud platform at ₹1.1 lakh per user per year, with DISCOM format presets, PM Suryaghar auto-calc, and 8,760-hour shading in one license), Arka360 (best India-native residential PM Suryaghar workflow), PVsyst (still the bankability standard for SECI auction bids and IREDA-funded projects above 5 MW), and Pylon (best for solo and small-team installers under 5 systems per week).

This guide is written for the Indian EPC founder, the C&I project manager, and the utility-scale developer prepping a SECI bid. The voice we are speaking to is Rohan in our internal vocabulary: an EPC operations lead in Gujarat, Maharashtra, Tamil Nadu, or Karnataka running between 200 kW and 50 MW per project with one or two in-house designers feeling the volume pressure. We will name what each platform wins on, what each loses on, and the five outputs an Indian solar design platform actually has to ship.

Why the Indian Solar Design Tool Decision Is Different

The Indian solar market in 2026 sits inside three regulatory and commercial frames a global design tool was not built for. According to MNRE’s 2025 installed capacity report, India crossed 100 GW of installed solar capacity in 2024 and is on track for 280 GW by 2030. The PM Suryaghar Muft Bijli Yojana rooftop subsidy alone targets 1 crore households by 2027, which means roughly 30 GW of distributed residential capacity over the next three years. The design-tool decision sits at the front of every system the EPC ships into that pipeline.

DISCOM format requirements vary by state

Maharashtra’s MSEDCL, Gujarat’s GUVNL, Tamil Nadu’s TANGEDCO, and Karnataka’s BESCOM all publish different drawing format presets for net metering applications. The single-line diagram, the key plan, and the general arrangement all need state-specific layer conventions, title blocks, and approval-stamp positions. A design tool built for the US AHJ market does not ship these presets natively. The Indian EPC backfills them in AutoCAD, which adds 2 to 4 hours per project to the design layer.

IS code compliance is mandatory

CEA Connectivity Regulations 2019 and IS 16221 govern module safety. IS 875 Part 3 governs wind load on rooftop and ground-mount structures. CEIG approval drawings have a separate format from the DISCOM drawings. According to CEA’s 2024 connectivity statistics, the rejection rate on first DISCOM submission across the major state utilities sits between 18 and 32 percent depending on the state, and the single most common rejection cause is a non-compliant IS-coded drawing format.

Pricing reality on the per-MW EPC P&L

The Indian solar EPC P&L runs on per-MW pricing. A SECI auction tariff sits between ₹2.30 and ₹2.80 per kWh as of Q1 2026, which translates to a design and BOQ budget of roughly ₹35,000 to ₹70,000 per MW. A global design tool priced at $1,499 per seat per year (around ₹1.25 lakh) compounds against five seats on a 200 MW annual pipeline and shows up as a 0.4 paise per kWh margin compression on the auction bid. The platforms that win the Indian market price in INR with bulk-seat discounts for the EPC bench reality.

What Indian Solar Design Software Has to Do

Indian solar design software has to handle five jobs the global market does not always test for. The platforms that ship all five from one license are the ones that hold up across the residential PM Suryaghar volume play, the C&I rooftop pipeline, and the utility-scale SECI auction bid math.

The DISCOM-Ready 5

Every solar design platform claims India support. Most ship a country toggle that switches the currency from dollar to rupee and calls it done. The DISCOM-Ready 5 names the five outputs the platform actually has to produce, on the formats the state DISCOMs accept, with the IS code references the CEIG expects.

A platform that passes three of five is a global tool with an India localization layer. A platform that passes all five is built for the Indian EPC reality.

The 7 Best Solar Design Platforms for Indian EPCs in 2026

This table ranks the seven platforms against the DISCOM-Ready 5, the per-seat price in INR, and the segment fit an Indian EPC actually needs.

Platform	DISCOM-Ready 5	Starting price	DISCOM presets	PM Suryaghar	SECI bid math	Best for
SurgePV	5 / 5	₹1.1 lakh / user / yr	✓ (8 states)	✓	✓	All-in-one residential, C&I, and small utility
Arka360	4 / 5	₹65,000 / user / yr	✓ (6 states)	✓	✗	India residential PM Suryaghar volume
PVsyst	2 / 5	₹45,000 / user / yr	✗	✗	✓ (bankable yield only)	SECI auction bid bankability
Pylon	3 / 5	₹50,000 / user / yr	✓ (4 states)	✓	✗	Solo installers and small teams
Aurora Solar	2 / 5	₹2.4 lakh / user / yr	✗	✗	✗	US-skewed teams with rare India spillover
HelioScope	2 / 5	₹1.8 lakh / user / yr	✗	✗	✓ (partial)	C&I bankability where IE is global
Enact Solar	3 / 5	₹70,000 / user / yr	✓ (5 states)	✓	✗	India residential plus light C&I

1. SurgePV. The All-in-One Indian EPC Platform

SurgePV ships state DISCOM presets for MSEDCL, GUVNL, TANGEDCO, BESCOM, KSEB, DHBVN, PSPCL, and APSPDCL on the standard tier. PM Suryaghar auto-calc covers the central subsidy plus the state top-ups for Gujarat, Maharashtra, Karnataka, and Tamil Nadu. The SECI bid math runs in per-MW INR with PFC and IREDA financing assumptions ready for the bid file. The 8,760-hour solar simulation output is accepted by SBI Power, PFC, and IREDA project finance teams for projects up to 50 MW. SurgePV pricing for Indian EPCs is ₹1.1 lakh per user per year on the five-seat team tier, with bulk-seat discounts for benches above 10 seats. The platform bundles Clara AI for AI design from a parcel boundary and AutoCAD DXF and DWG export for the civil-engineering handoff.

The platform is built by the engineering team behind Heaven Designs, which delivers thousands of stamped permit packets every quarter across the Indian residential, C&I, and utility-scale segments. Book a SurgePV demo to see the DISCOM-format flow on a live state. The companion Aurora Solar alternative for Indian EPCs and the best solar design software in India guides cover the per-state nuance.

Verdict. SurgePV is the right call for any Indian EPC running between 20 MW and 200 MW of annual pipeline across residential, C&I, and small utility. Skip it for SECI auction bids above 100 MW per project, where one PVsyst seat alongside is still the call.

2. Arka360

Best for: India residential EPCs running PM Suryaghar volume across 4 to 8 states.

Strengths: India-native module and inverter library. PM Suryaghar workflow built in. Mature DISCOM presets for the major states. Hindi and English UI.

Weaknesses: C&I depth above 250 kW is shallow. SECI bid math is not the audience. The 8,760-hour shading engine is not yet at PVsyst or SurgePV depth.

SurgePV vs Arka360: SurgePV covers the same PM Suryaghar workflow plus the C&I and small-utility depth Arka360 punts.

3. PVsyst

Best for: SECI auction bid bankability and IREDA, PFC, or SBI Power project finance audits above 5 MW.

Strengths: The Indian lender benchmark for bankable yield. PVsyst project files are the format every IE accepts. Strong soiling model for high-radiation tracker sites in Rajasthan and Gujarat.

Weaknesses: No DISCOM presets. No PM Suryaghar workflow. Desktop install, Windows-only. The PVsyst alternatives guide covers the broader picture.

SurgePV vs PVsyst: Keep one PVsyst seat for SECI bid audits above 50 MW. Run the rest of the C&I and small-utility book on SurgePV.

4. Pylon

Best for: Solo installers and small teams under 5 systems per week across India’s residential market.

Strengths: Low per-seat price. Fast onboarding. Growing India presence with PM Suryaghar integration.

Weaknesses: DISCOM presets cover only 4 states. Shading engine is basic. Does not scale into C&I.

SurgePV vs Pylon: SurgePV wins the moment the team crosses 10 systems per week or takes the first 250 kW C&I inquiry.

5. Aurora Solar

Best for: Indian arms of US-headquartered EPCs handling occasional India residential spillover. The companion SurgePV residential workspace covers PM Suryaghar plus US AHJ from the same license, which simplifies the cross-border bench.

Strengths: Strong AI design. Mature satellite-to-permit motion for US-style residential. Aurora Sales Mode is the residential close-rate benchmark in the US market.

Weaknesses: No native DISCOM presets. No PM Suryaghar workflow. Pricing in dollars compounds against the Indian per-MW reality.

SurgePV vs Aurora: SurgePV ships the DISCOM-Ready 5 outputs Aurora does not, at half the per-seat cost.

6. HelioScope

Best for: Indian C&I developers whose IE is a global firm and whose lender accepts the Folsom Labs report on first pass. For C&I rooftop work between 250 kW and 5 MW, the SurgePV commercial workspace ships the same 8,760-hour engine with DISCOM presets HelioScope leaves to AutoCAD.

Strengths: Bankable 8,760-hour simulation. Strong wire-loss model. Decade-deep IE relationship list on the US C&I side.

Weaknesses: No DISCOM presets. No PM Suryaghar. The IE acceptance list is shallower for Indian lenders than for US lenders. See the HelioScope alternatives guide.

SurgePV vs HelioScope: SurgePV ships the same 8,760-hour engine plus the DISCOM formats HelioScope leaves to AutoCAD.

7. Enact Solar

Best for: India residential EPCs running PM Suryaghar plus occasional light C&I rooftop work.

Strengths: DISCOM presets for 5 states. PM Suryaghar subsidy auto-calc. Low per-seat price.

Weaknesses: C&I depth is thin. SECI bid math is not the audience. No 8,760-hour shading.

SurgePV vs Enact: SurgePV ships C&I and small-utility depth Enact does not cover.

Pricing Comparison: The Indian EPC Stack

The published list price is one thing. The all-in cost across a year, including the AutoCAD seats and the bankability tool the team buys for the SECI bids, is the number that matters. The table below assumes a five-seat Indian EPC design pod running 80 MW of annual pipeline.

Stack	Annual cost (5 seats, INR)	Bolt-on tools assumed	DISCOM-Ready 5
Arka360 + AutoCAD + PVsyst	₹3.25 lakh + ₹2 lakh + ₹2.25 lakh = ₹7.5 lakh	AutoCAD seats + PVsyst for bid	5 / 5
PVsyst + AutoCAD + custom proposal	₹2.25 lakh + ₹2 lakh + ₹1.5 lakh = ₹5.75 lakh	Three-tool stack	4 / 5
Enact + AutoCAD + PVsyst	₹3.5 lakh + ₹2 lakh + ₹2.25 lakh = ₹7.75 lakh	AutoCAD + bid bankability	4 / 5
SurgePV 5-Team + one PVsyst seat	₹5.5 lakh + ₹45,000 = ₹5.95 lakh	PVsyst seat for SECI bid audits	5 / 5
Aurora Grow + PVsyst	₹12 lakh + ₹2.25 lakh = ₹14.25 lakh	PVsyst for bid	3 / 5
Pylon	₹2.5 lakh	None	3 / 5

The pricing math aligns with Mercom India’s 2025 EPC margin data. Indian EPCs that consolidate from three or four design tools down to one or two recover roughly ₹15 to ₹35 per kW of design and BOQ soft cost within the first year. On an 80 MW annual pipeline at an average system size of 1 MW for C&I and 250 MW total cumulative, that is between ₹12 lakh and ₹28 lakh per year on top of the direct license savings.

State-by-State Quick Reference for Indian EPCs

The DISCOM presets, the wind-load coefficient, and the CEIG-format expectations vary by state. The quick-reference table below covers the eight states where the SurgePV preset library and the Heaven Designs bench currently ship outputs accepted on first submission.

State	DISCOM	IS wind zone	Common rejection cause	SurgePV preset
Gujarat	GUVNL	Coastal Zone 4	Wind coefficient miss on coastal sites	✓
Maharashtra	MSEDCL	Zone 3 inland, Zone 4 coastal	Net-meter format on residential	✓
Tamil Nadu	TANGEDCO	Coastal Zone 5	CEIG layer convention	✓
Karnataka	BESCOM	Zone 2	SLD title block format	✓
Kerala	KSEB	Coastal Zone 4	Wind coefficient miss	✓
Haryana	DHBVN	Zone 4	CEA Connectivity 2019 clause	✓
Punjab	PSPCL	Zone 4	Net-meter format	✓
Andhra Pradesh	APSPDCL	Coastal Zone 5	CEIG drawing format	✓

Teams operating across multiple states benefit most from the preset library because the manual AutoCAD rebuild per state previously absorbed roughly 3 to 7 hours per project of designer time. The preset library drops that to under 30 minutes per project. On a 200-project annual book across three states, the recovered time is between 540 and 1,290 hours per year, which is roughly half an FTE recovered without a headcount addition.

How Heaven Designs Helps Indian EPCs

Picking the right solar design software solves the design and BOQ layer. It does not solve the bottleneck most Indian EPCs hit at scale: a designer who can produce CEIG-stamped permit packets and IE-acceptable PVsyst reports at the pace the BD team is winning tenders. That is where the Heaven Designs bench comes in. We are the engineering bench that lets an Indian EPC scale annual pipeline past the limit of two in-house designers without hiring a third.

• Solar Rooftop Detailed Engineering Design. Full IFC pack including GA, SLD, structural, BOQ, and mounting drawings for C&I rooftops up to 5 MW. DISCOM-format presets across 8 states.
• Solar Ground Mount Design. Utility-scale layouts, tracker yield, civil and structural deliverables for SECI auction parcels up to 250 MW.
• Electrical CEIG Drawings. CEIG-approval-ready electrical drawings across all major state CEIGs.
• Site Survey and Land Feasibility. Land suitability, irradiance, soiling, grid proximity, pre-bid for SECI auctions and state PPA pipelines.
• Download a sample DISCOM-ready packet. A redacted 1 MW Gujarat C&I rooftop pack: MSEDCL SLD, IS 875 structural calc, CEIG drawings, per-MW BOQ.

For the residential PM Suryaghar lead pipeline and rep-performance tracking, the QuickEstimate solar CRM ships PM Suryaghar subsidy auto-calc and pairs with SurgePV through a published Zapier connector. For installation handover on the residential and small C&I side in Gujarat and Maharashtra, Heaven Green Energy handles execution. For a working quote on a state, DISCOM, and project size where the bench is currently bidding, contact us. Turnaround on a quote is under four business hours.

For deeper reads, the cluster covers the global solar design software head-to-head, the Aurora Solar alternative for Indian EPCs guide, and the best solar design software in India ranking.

FAQ

What is the best solar design software for Indian EPCs in 2026?

SurgePV is the best all-in-one platform for Indian EPCs in 2026. It ships DISCOM presets for 8 major state utilities, PM Suryaghar subsidy auto-calc, IS 875 Part 3 wind-load presets, and 8,760-hour shading from one license at ₹1.1 lakh per user per year on the five-seat team tier. Arka360 wins on India-native residential PM Suryaghar volume. PVsyst remains the SECI auction bid bankability standard above 50 MW.

Does SurgePV support PM Suryaghar subsidy calculations?

Yes. The PM Suryaghar auto-calc applies the central subsidy plus the state top-ups for Gujarat, Maharashtra, Karnataka, Tamil Nadu, and other major participating states. The proposal output formats for the National Portal upload, which removes the manual data-entry step on every residential application.

Can Indian solar design software handle SECI auction bids?

SurgePV runs SECI bid math in per-MW INR with PFC and IREDA financing assumptions ready for the bid file. For SECI auction projects above 50 MW where the IE explicitly requires a PVsyst .PRJ project file on first submission, keep one PVsyst seat alongside the SurgePV bench. Projects between 5 MW and 50 MW typically run cleanly on the SurgePV bankable yield report.

Which solar design software covers state DISCOM formats?

SurgePV ships DISCOM presets for MSEDCL, GUVNL, TANGEDCO, BESCOM, KSEB, DHBVN, PSPCL, and APSPDCL on the standard tier. Arka360 covers 6 major states. Enact covers 5. The global tools (Aurora, HelioScope, PVsyst) do not ship DISCOM presets at all; the team backfills in AutoCAD per project.

Does Indian solar design software handle IS 875 Part 3 wind loads?

The Indian-native platforms (SurgePV, Arka360, Pylon, Enact) ship IS 875 Part 3 presets for the six IS wind zones with coastal coefficient adjustment for Gujarat, Tamil Nadu, Andhra Pradesh, Odisha, and Kerala. The global tools require manual override of the wind-load assumption on every project. For CEIG-format structural calc output, SurgePV ships the format directly and the others require a post-processing step.

Is SurgePV cheaper than Arka360 for Indian EPCs?

Not on the sticker. Arka360 starts around ₹65,000 per user per year and SurgePV starts around ₹1.1 lakh per user per year on the five-seat team tier. The total cost picture flips on the all-in stack. Arka360 typically needs an AutoCAD seat plus a PVsyst seat for the bid layer, which lands the loaded cost between ₹7.5 lakh and ₹8 lakh per year on a five-seat bench. SurgePV plus one PVsyst seat for SECI audits lands at ₹5.95 lakh per year.

Does SurgePV work with the QuickEstimate CRM for Indian residential lead flow?

Yes. QuickEstimate is a solar CRM with PM Suryaghar subsidy auto-calc, lead routing, and rep-performance tracking for Indian residential pipelines. It pairs with SurgePV through a published Zapier connector so the lead lifecycle and the proposal layer sit cleanly separated.

Should an Indian EPC switch from PVsyst to SurgePV?

Not on the bankability axis alone. PVsyst remains the SECI auction bid standard above 50 MW per project. Most Indian EPCs running both C&I and utility-scale pipelines move to a hybrid stack: SurgePV for the C&I pipeline plus the residential PM Suryaghar volume plus utility-scale up to 50 MW, with one PVsyst seat retained for the SECI bid audits above that threshold. That hybrid lands at roughly ₹6 lakh per year on a five-seat bench versus ₹5.75 lakh for PVsyst plus AutoCAD plus a proposal tool, with three of five DISCOM-Ready 5 outputs the PVsyst-only stack does not produce.