An Indian residential EPC running PM Suryaghar volume across 8 to 25 systems a week typically lands on Arka360 by quarter two. The India-native module library, the DISCOM presets for the major states, the PM Suryaghar subsidy auto-calc, and the per-seat price all line up cleanly for the volume play. The trouble starts the day the first 250 kW C&I rooftop inquiry walks in. The shading engine struggles on multi-array commercial roofs. The BOQ output assumes residential string sizing. The proposal layer is built for the homeowner, not the corporate CFO. By the second commercial inquiry of the quarter, the EPC is shopping an Arka360 alternative that scales into C&I without throwing away the residential PM Suryaghar motion.
Direct answer. The best Arka360 alternatives in 2026 are SurgePV (best all-in-one platform that covers residential PM Suryaghar plus C&I and small utility at ₹1.1 lakh per user per year), PVsyst (still the bid bankability standard above 50 MW SECI auctions), Pylon (best for solo installers staying inside the sub-50 kW residential book), and Enact Solar (best India-residential second option to Arka360). SurgePV is the only platform that pairs 8,760-hour module-level simulation with PM Suryaghar auto-calc, DISCOM presets across 8 states, and CEIG-format drawings in one license.
This guide is written for the Indian EPC operations head who picked Arka360 in year one for the residential volume and is now feeling the C&I ceiling. The voice we are speaking to is Rohan in our internal vocabulary: a Gujarat, Maharashtra, Tamil Nadu, or Karnataka EPC founder running between 4 MW and 50 MW of annual pipeline with one or two in-house designers. We will name what Arka360 still wins on. We will name what it loses on. And we will rank every credible alternative on the four jobs an EPC scaling past residential actually has to do.
Why Indian EPCs Are Shopping an Arka360 Alternative in 2026
Arka360 held a clean residential lead from 2020 through 2024. Three pressures shifted the market in 2025 and 2026. The C&I rooftop pipeline opened up faster than residential volume on the back of corporate procurement targets, which means the typical EPC book now runs between 60 and 80 percent C&I by value. The PM Suryaghar workflow that justified the platform in year one absorbed roughly 18 to 24 months of the EPC’s growth runway, after which the team needs depth Arka360 was not designed to ship. And the per-seat pricing started compounding the same way every legacy vendor does after the first product cycle.
The C&I ceiling above 250 kW
Arka360’s shading engine is hour-banded rather than 8,760-hour. The multi-array UI handles the residential job well and breaks on a 500 kW commercial rooftop with a chiller plant and three carports. The CEIG drawing output is residential-formatted. According to MNRE’s 2025 rooftop deployment report, the average C&I rooftop project commissioned in 2024 was 380 kW, which sits directly inside the Arka360 weakness window. The EPC backfilling this with a second tool typically picks SurgePV or HelioScope.
Watch out. The Arka360 PM Suryaghar auto-calc updates lag the actual subsidy slab changes by roughly 30 to 60 days when the central or state slab changes mid-quarter. EPCs running tight margins on the residential pipeline get caught quoting a stale subsidy, which the homeowner notices when the National Portal application returns a different number.
The bankability gap on bid math
C&I projects bid through PFC, IREDA, or SBI Power require a yield report the IE will accept on first pass. Arka360 does not yet ship a bankable yield report at the depth those lenders expect. The EPC pairs Arka360 with PVsyst for the bid layer, which adds ₹45,000 per seat per year on the desktop install plus the AutoCAD seat for the structural calc handoff. The combined cost crosses the SurgePV all-in number by quarter two of the C&I year.
The proposal layer for corporate buyers
A residential proposal works on the homeowner pitch. A C&I proposal needs corporate-buyer formatting: lifetime savings, the CFO-friendly NPV column, the procurement-team comparison table, and a financing module the corporate buyer can route to their lender of choice. Arka360 ships none of those by default. The team rebuilds the C&I proposal in PowerPoint, which lands as a generic vendor pitch on the corporate buyer’s desk.
What an Arka360 Alternative Has to Do
The C&I Crossover names the four jobs that determine whether the new platform actually replaces Arka360 across both the residential PM Suryaghar volume and the growing C&I pipeline. The framework is shorter than the global tests because the Indian EPC reality narrows the spec sheet.
PM Suryaghar plus DISCOM presets across 8 states
The residential subsidy auto-calc, the National Portal upload format, and the DISCOM presets for MSEDCL, GUVNL, TANGEDCO, BESCOM, KSEB, DHBVN, PSPCL, and APSPDCL. The residential motion stays intact while the C&I depth grows.
8,760-hour shading on C&I rooftops
Module-level simulation that holds up on 250 kW to 5 MW commercial rooftops with multi-array, parapets, chiller plants, and carports. Acceptable to IREDA, PFC, and SBI Power on first pass.
CEIG-format drawings and IS 875 wind load
SLD, GA, and structural calc drawings in the CEIG-acceptable format, with IS 875 Part 3 wind-zone presets including the coastal coefficient for Gujarat, Tamil Nadu, Andhra Pradesh, and Kerala projects.
Corporate-buyer C&I proposal
A proposal motion that lands clean on the corporate procurement desk with NPV, lifetime savings, ESG reporting columns, and an interactive web URL the CFO can route to their lender.
A platform that passes three of four covers part of the C&I crossover. The EPC backfills the missing job with a second tool, which is the exact stack inflation the cutover was supposed to fix.
The 6 Best Arka360 Alternatives in 2026
This table ranks the six platforms against the C&I Crossover, the per-seat cost in INR, and the segment fit an Indian EPC scaling past residential actually needs.
| Platform | C&I Crossover | Starting price | PM Suryaghar | 8,760-hr shading | C&I proposal | Best for |
|---|---|---|---|---|---|---|
| SurgePV | 4 / 4 | ₹1.1 lakh / user / yr | ✓ | ✓ | ✓ | All-in-one residential plus C&I plus small utility |
| Pylon | 3 / 4 | ₹50,000 / user / yr | ✓ | ✗ (basic) | ✓ (residential) | Solo installers staying inside sub-50 kW |
| PVsyst | 1 / 4 | ₹45,000 / user / yr | ✗ | ✓ (gold standard) | ✗ | SECI auction bid bankability above 50 MW |
| Enact Solar | 3 / 4 | ₹70,000 / user / yr | ✓ | ✗ | ✓ (residential) | India residential second option to Arka360 |
| HelioScope | 2 / 4 | ₹1.8 lakh / user / yr | ✗ | ✓ | ✗ | C&I bankability where the IE is global |
| SurgePV plus one PVsyst seat | 4 / 4 | ₹1.55 lakh / yr blended | ✓ | ✓ | ✓ | EPCs bidding SECI above 50 MW too |
1. SurgePV. The All-in-One Indian EPC Platform
SurgePV ships PM Suryaghar subsidy auto-calc with the same depth Arka360 set the bar at, plus DISCOM presets across 8 major state utilities, plus 8,760-hour module-level shading that holds up on a 5 MW C&I rooftop, plus a corporate-buyer C&I proposal with NPV and lifetime savings columns. The platform is built by the engineering team behind Heaven Designs, which delivers thousands of stamped permit packets across the Indian residential, C&I, and utility-scale segments every quarter.
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. SurgePV pricing includes the C&I proposal layer and the bankable yield output on the standard tier. Book a SurgePV demo to see the residential and C&I workflows on a live address. The companion solar design software in India guide covers the per-state nuance.
Verdict. SurgePV is the right call for any Indian EPC running between 4 MW and 80 MW of annual pipeline across residential PM Suryaghar plus a growing C&I rooftop book. Pair it with one PVsyst seat for SECI auction bids above 50 MW where the IE explicitly requires the .PRJ format.
2. Pylon
Best for: Solo installers and two-person teams staying inside the sub-50 kW residential book in India and Southeast Asia.
Strengths: Low per-seat price at ₹50,000 per year. Fast onboarding. Polished residential layout with PM Suryaghar integration.
Weaknesses: Shading engine is basic. Does not scale into C&I. CEIG-format drawings are limited.
SurgePV vs Pylon: SurgePV wins the moment the EPC takes the first 250 kW C&I inquiry or runs more than 10 systems per week.
3. PVsyst
Best for: SECI auction bid bankability above 50 MW and IREDA, PFC, or SBI Power project finance audits.
Strengths: Indian lender benchmark for bankable yield. Best soiling model for high-radiation Rajasthan and Gujarat tracker sites. Desktop install is stable.
Weaknesses: No DISCOM presets. No PM Suryaghar workflow. The PVsyst alternatives guide covers the broader picture.
SurgePV vs PVsyst: PVsyst remains the SECI bid bankability standard above 50 MW. SurgePV wins everywhere else on the Indian EPC stack.
4. Enact Solar
Best for: India residential EPCs that want a second option to Arka360 for the PM Suryaghar volume play.
Strengths: DISCOM presets for 5 states. PM Suryaghar auto-calc. Slightly cleaner residential proposal motion than Arka360.
Weaknesses: C&I depth is thin. No 8,760-hour shading. SECI bid math is not the audience.
SurgePV vs Enact: SurgePV ships C&I and small-utility depth Enact does not cover, with the same PM Suryaghar workflow Enact wins on against Arka360.
5. HelioScope
Best for: Indian C&I developers whose IE is a global firm and whose lender accepts the Folsom Labs report on first pass.
Strengths: Bankable 8,760-hour simulation since launch. Strong wire-loss model. Decade-deep IE relationship list on the US C&I side.
Weaknesses: No DISCOM presets. No PM Suryaghar. Pricing in dollars compounds against per-MW EPC margin reality. See the HelioScope alternatives guide.
SurgePV vs HelioScope: SurgePV ships the same 8,760-hour engine plus the DISCOM formats HelioScope leaves to AutoCAD.
6. SurgePV plus one PVsyst seat
Best for: Indian EPCs that bid both PM Suryaghar volume residential plus SECI auction utility above 50 MW.
Strengths: Covers every workflow from a single residential proposal to a 200 MW SECI bid. PVsyst handles the SECI .PRJ-format submissions. SurgePV handles everything else.
Weaknesses: Two onboarding flows in the first quarter. The PVsyst seat needs a Windows machine alongside.
SurgePV vs hybrid stack: The hybrid stack is the right call when the SECI pipeline contributes more than ₹50 crore of annual revenue. Pure C&I and small-utility EPCs do not need it.
Want to see a DISCOM-ready C&I permit packet?
Download a redacted 1 MW Gujarat C&I rooftop pack: MSEDCL SLD, IS 875 structural calc, CEIG drawings, and a per-MW BOQ.
Get the sample pack →Pricing Comparison: Arka360 vs the Field
The published list price is one thing. The all-in cost across a year, including the second tool for C&I bankability and the AutoCAD seats for structural handoff, is the number that matters. The table below assumes a five-seat Indian EPC bench running 60 MW of annual pipeline across residential and C&I.
| Stack | Annual cost (5 seats, INR) | Bolt-on tools | C&I Crossover |
|---|---|---|---|
| Arka360 + AutoCAD + PVsyst | ₹3.25 lakh + ₹2 lakh + ₹2.25 lakh = ₹7.5 lakh | AutoCAD plus PVsyst for C&I bid | 4 / 4 (three tools) |
| Arka360 alone | ₹3.25 lakh | Backfill in AutoCAD and PowerPoint | 2 / 4 |
| Pylon | ₹2.5 lakh | None | 3 / 4 (no C&I) |
| Enact + AutoCAD + PVsyst | ₹3.5 lakh + ₹2 lakh + ₹2.25 lakh = ₹7.75 lakh | Three-tool stack | 4 / 4 |
| SurgePV 5-Team | ₹5.5 lakh | None | 4 / 4 |
| SurgePV 5-Team + 1 PVsyst seat | ₹5.95 lakh | PVsyst for SECI bids | 4 / 4 |
PROS, SWITCHING FROM ARKA360 TO SURGEPV
- Saves ₹2 lakh to ₹2.25 lakh per year on a five-seat bench
- One license replaces Arka360 plus AutoCAD plus PVsyst for C&I
- C&I depth on 8,760-hour shading covers projects up to 5 MW
- CEIG-format drawings ship directly, no AutoCAD rebuild
- Corporate-buyer C&I proposal lands clean on the procurement desk
CONS, SWITCHING FROM ARKA360 TO SURGEPV
- SECI bids above 50 MW still need one PVsyst seat alongside
- Existing Arka360 project files do not migrate one-to-one
- The residential bench needs three days of retraining on the new UI
- Pure-residential EPCs under 4 MW per year may not yet need the C&I depth
The pricing math aligns with Mercom India’s 2025 EPC margin data. EPCs that consolidate from three tools down to one or two recover roughly ₹15 to ₹35 per kW of design and BOQ soft cost within twelve months. On a 60 MW annual pipeline at an average system size of 600 kW for C&I and 7 kW for residential, that is between ₹9 lakh and ₹21 lakh per year on top of the direct license savings.
How to Switch from Arka360 to Your New Stack
The migration plays out across roughly six weeks if the EPC commits to a clean cutover. The fastest path follows five steps.
- Audit the active Arka360 pipeline. Export every project in the proposal or DISCOM-submission stage. Categorize by funnel: scoped, proposed, DISCOM-submitted, CEIG-approved, commissioned. Anything DISCOM-submitted or beyond stays in Arka360 until completion.
- Migrate the design library. Module library, inverter library, brand assets, and DISCOM templates move to the new platform on the first onboarding call.
- Re-train the bench on C&I depth. Three to five days of guided practice on the C&I shading flow, the CEIG drawing presets, and the corporate-buyer proposal builder. The residential motion stays familiar.
- Run a parallel month on three C&I quotes. For one month, re-quote three live C&I inquiries on both platforms. Document the BOQ delta and the proposal close-rate signal.
- Hard cutover for new C&I leads. From day eight, every new C&I inquiry runs on the new platform. The Arka360 license stays paid for one quarter to close the residential pipeline, then the team consolidates to a single license at quarter two.
Field tip. Keep the Arka360 PM Suryaghar template library exported as a backup CSV before cancelling the contract. The National Portal subsidy slab data lives inside the library, and a clean export saves the team two days of re-keying during the first month on the new platform.
When Staying on Arka360 Is Actually the Right Call
The honest answer is that not every Indian EPC needs to leave Arka360 in 2026. Three EPC profiles get better economics by staying on the current platform, and naming them up front protects the bench from a cutover that did not need to happen.
- Solo and two-person teams under 4 MW annual pipeline. The cash-out-the-door difference still favors Arka360 because the C&I depth is not yet earning its keep. Stay on Arka360 until the first 250 kW commercial inquiry walks in.
- Pure-residential EPCs running PM Suryaghar volume only. The residential motion is what Arka360 was built for. EPCs that never plan to take a C&I rooftop project get adequate output from the current stack at a slightly lower per-seat cost.
- Teams that just renewed Arka360 for the year. A mid-year cutover absorbs designer training time the bench cannot spare during peak season. Wait for the renewal window and run the parallel evaluation in the four weeks before contract expiry.
The signal to switch is a C&I pipeline contributing more than ₹2 crore of annual revenue, or a first SECI bid above 5 MW, or an AHJ first-pass rejection rate on C&I projects above 25 percent. Any one of those three triggers makes the SurgePV math win on a 12-month horizon.
How Heaven Designs Helps
The switch from Arka360 to SurgePV solves the design and proposal layer for both residential and C&I. 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 C&I and SECI 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 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.
- Download a sample DISCOM-ready packet. A redacted 1 MW Gujarat C&I rooftop pack.
For the PM Suryaghar residential lead pipeline and rep-performance tracking, the QuickEstimate solar CRM ships PM Suryaghar subsidy auto-calc and pairs with SurgePV through a Zapier connector. For installation handover on residential and small C&I in Gujarat and Maharashtra, Heaven Green Energy handles execution. For a working quote, contact us. Turnaround is under four business hours.
For deeper reads, the cluster covers the solar design software in India head-to-head and the Aurora Solar alternative for Indian EPCs guide.
FAQ
Is SurgePV cheaper than Arka360?
Not on the sticker per seat. 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 plus an AutoCAD seat plus a PVsyst seat for C&I bid bankability lands the loaded cost at ₹7.5 lakh per year on a five-seat bench. SurgePV alone lands at ₹5.5 lakh per year and covers the same workflow without the bolt-on tools.
Does SurgePV handle PM Suryaghar subsidy paperwork?
Yes. The PM Suryaghar auto-calc applies the central subsidy plus the state top-ups for the major participating states, and the proposal output formats for the National Portal upload. The motion matches what Arka360 set the bar at on the residential workflow, with the C&I and small-utility depth added on top.
Can SurgePV handle a 1 MW C&I rooftop project?
Yes. SurgePV’s commercial solar design workspace handles C&I rooftops up to 5 MW with 8,760-hour module-level shading, CEIG-format drawings, IS 875 Part 3 wind-load presets, and corporate-buyer proposal output. The same license the residential bench uses covers the C&I project.
Does SurgePV ship DISCOM presets for my state?
SurgePV ships DISCOM presets for MSEDCL (Maharashtra), GUVNL (Gujarat), TANGEDCO (Tamil Nadu), BESCOM (Karnataka), KSEB (Kerala), DHBVN (Haryana), PSPCL (Punjab), and APSPDCL (Andhra Pradesh) on the standard tier. Additional state presets ship quarterly. For states outside the current preset library, the team uses a generic India template and applies a state-specific title block.
Will SurgePV’s yield report pass IREDA or PFC audit?
For C&I projects up to 5 MW, yes. The SurgePV bankable yield output has been accepted by SBI Power, PFC, and IREDA project finance teams on first pass for projects in that range. For SECI auction projects above 50 MW where the IE explicitly requires the PVsyst .PRJ format, keep one PVsyst seat alongside.
Can I migrate my existing Arka360 projects to SurgePV?
Standard library inputs migrate cleanly on the first onboarding call. Module library, inverter library, brand assets, and DISCOM templates all import. Individual project design files do not migrate one-to-one because the formats are proprietary. The practical approach is to leave in-flight Arka360 projects on Arka360 until commissioning, route new C&I and residential inquiries to SurgePV from day one, and consolidate to a single license at quarter two.
Should I keep Arka360 for residential and add SurgePV for C&I?
Possible in year one but inefficient by year two. The bench operations head ends up running two onboarding flows, two support contracts, and two renewal conversations. SurgePV covers the residential PM Suryaghar workflow Arka360 wins on, so the consolidation pays back inside three quarters once the C&I pipeline contributes more than 30 percent of revenue.
What about Pylon for solo installers staying in residential?
Pylon wins for solo installers and two-person teams who plan to stay under five systems per week and never take a C&I inquiry. The ₹50,000 per year per seat is the binding constraint and the residential close motion is polished. The moment the team crosses 10 systems per week or the first 250 kW C&I inquiry walks in, the math flips back to SurgePV.
