Indian solar proposals have to answer two very different customers with one toolkit. A residential PM Surya Ghar customer wants to know the subsidy, the net meter, and the monthly saving. An industrial captive customer wants a CAPEX versus RESCO comparison, an open access analysis, and a view on how their state’s banking and wheeling rules will change. Most proposal software was built for neither, and the Indian market’s price sensitivity means nobody wants to pay much to fix that.
Direct answer. The best solar proposal software in India for most EPCs is SurgePV, because a single license covers the 3D layout, the yield, the single-line diagram, and a branded proposal at a price Indian margins can absorb. For industrial captive and open access work the commercial modelling moves into a spreadsheet regardless of which tool produced the yield, because state-level banking and wheeling rules are not in any product.
TL;DR
- Net metering rules, banking, and wheeling charges are state subjects. There is no national model.
- Industrial tariffs are slab and demand based, so the value of a displaced unit depends on where the customer sits.
- PM Surya Ghar changed residential economics, and the subsidy has to be shown as a conditional deduction.
- CAPEX versus RESCO is the real industrial decision, and it is a financial comparison, not a technical one.
- Margins are thin. A proposal tool that costs more than the margin on several projects will not survive review.
What India Actually Changes About Proposal Software
Everything important is state-level. Net metering caps, whether banking of exported energy is allowed and at what charge, wheeling and transmission charges for open access, and cross-subsidy surcharges are set by state regulators and vary widely. A proposal produced for a Maharashtra customer and reused for a Tamil Nadu customer will be wrong in ways that matter. No proposal platform carries a maintained state-by-state rule set, so this is template work the EPC does.
Industrial tariffs are structured. Commercial and industrial customers pay on slabs with demand charges, time-of-day components in several states, and various surcharges. Solar displaces the energy component and sometimes helps with demand charges, but not uniformly. Modelling against a blended per-unit rate is the most common error in Indian C&I proposals and it usually overstates the saving.
PM Surya Ghar reshaped residential. The rooftop subsidy scheme changed the residential customer conversation substantially, and it comes with eligibility conditions, vendor empanelment requirements, and a defined process. Showing it as a straight discount rather than a conditional deduction creates a problem if the claim fails.
CAPEX versus RESCO is the industrial question. Most serious Indian industrial customers are deciding whether to own the asset or buy power from a developer under a RESCO or power purchase arrangement. That is a financial comparison involving tax treatment, accelerated depreciation, balance sheet impact, and tariff escalation, and it belongs in a spreadsheet built for it.
Price discipline is absolute. Indian EPC margins on rooftop work are thin. A tool priced for a US installer’s economics does not survive an Indian cost review, which is why free and low-cost options have disproportionate share here.
The Platforms Ranked for India
| Platform | Best for | State rule flexibility | Slab and demand tariff modelling | Design output | Price per seat per year |
|---|---|---|---|---|---|
| SurgePV | EPCs wanting design plus proposal | Configurable | Configurable | Full, with DWG | ~Rs 1.1L |
| Excel over yield output | Industrial CAPEX vs RESCO cases | Fully manual | Fully manual | None | Time |
| PVsyst plus spreadsheet | Bankable industrial and utility | Manual | Manual | Yield only | ~Rs 42,000 |
| Indian market tools | Residential PM Surya Ghar workflow | Often native | Basic | Layout | Subscription, INR |
| HelioScope | Fast C&I layout and yield | Manual | No | Layout only | ~Rs 99,000 |
| OpenSolar | Low-cost residential volume | Configurable | Basic | Basic | Rs 0 plus fees |
| Aurora Solar | Export-facing or premium work | Configurable | Configurable | Good | ~Rs 1.6L to 2.6L |
SurgePV is the consolidation option, covering the 3D layout, 8,760-hour yield, string design, the single-line diagram, AutoCAD DWG export for DISCOM and CEIG submission, and a branded proposal from one license. For an Indian EPC currently running a free proposal tool plus a draughtsman, that is the trade being evaluated. The technical side is covered in best solar design software in India.
Excel over a yield output is how every serious industrial CAPEX versus RESCO comparison actually gets built, and no packaged tool replaces it.
PVsyst remains the yield model IREDA, PFC, SBI, and SECI-appointed independent engineers expect on bankable work. See PVsyst price.
OpenSolar has real share in Indian residential on price alone. See OpenSolar pricing.
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What an Indian Proposal Has to Contain
- System specification with ALMM-listed modules where the project requires it, inverter selection, and capacity in kWp and kVA.
- Generation estimate with the meteorological data source named.
- State and DISCOM identified, with the applicable net metering or net billing rules stated.
- Tariff analysis by slab and demand component, showing which charges the system reduces and which it does not.
- Subsidy treatment for PM Surya Ghar residential work, shown as a conditional deduction with the eligibility requirements.
- CAPEX versus RESCO comparison for industrial customers, with tax treatment and depreciation shown.
- Approval pathway covering DISCOM application, net meter installation, and CEIG approval where the capacity requires it.
- Assumptions for tariff escalation and degradation.
Item 7 is where Indian projects lose time rather than money. The approval sequence is long enough that omitting it from the proposal sets a commissioning expectation the EPC cannot meet.
Pricing in Rupees
| Stack | Annual cost per seat | Covers |
|---|---|---|
| OpenSolar | Rs 0 plus transaction fees | Basic residential proposal |
| PVsyst | ~Rs 42,000 | Bankable yield, no proposal |
| HelioScope | ~Rs 99,000 | C&I layout and yield |
| SurgePV | ~Rs 1.1L | Proposal plus full design, SLD, DWG |
| Aurora | ~Rs 1.6L to 2.6L | Proposal plus design |
Dollar-quoted figures converted at an illustrative 84.
What Most Indian EPCs Get Wrong
They quote savings on a blended per-unit tariff.
An industrial customer’s bill contains slab-based energy charges, demand charges, and various surcharges, and solar reduces them unevenly. A proposal that multiplies annual generation by an average per-unit rate produces a number that the customer’s finance team will not reproduce, and in competitive industrial bidding that is how credibility is lost. Breaking the bill into components takes an hour and produces a defensible figure.
The second mistake is treating the PM Surya Ghar subsidy as a discount on the EPC’s price. It is a conditional scheme payment, and if the claim fails the customer owes the difference. Show the gross price, the subsidy as a labelled deduction, and the conditions.
When Proposal Software Is Not the Constraint
For most Indian EPCs the binding constraint is engineering throughput, not proposal quality. Enquiries stall waiting on a DISCOM-format drawing set, a CEIG-ready electrical package, or a structural report.
That is what our electrical CEIG drawings, solar rooftop detailed engineering design, STAAD Pro report calculations, and MW-scale project management consultancy services exist for. Many Indian EPCs run a low-cost proposal tool in front and route the engineering to a bench behind it, which keeps the software bill small and the throughput high. See the sample design pack or talk to our team.
Conclusion
- Model the bill by component. Blended per-unit savings do not survive an industrial finance review.
- Show the subsidy as conditional. PM Surya Ghar is a scheme payment, not a discount you control.
- Put the approval timeline in the proposal. DISCOM and CEIG steps set the commissioning date, not your install crew.
In this country series: solar software in India, shading analysis software in India, Pvsyst review, Helioscope review. Tool deep dives: Aurora Solar review.
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Disclosure and accuracy note
Commercial relationship. Heaven Designs and SurgePV are part of the same group. Treat our recommendation of SurgePV as a vendor making its own case, not an independent verdict. We have tried to describe every other product fairly, and to say plainly where a competitor is the better choice.
Pricing. All prices are indicative, compiled from public sources when this page was written. They vary by tier, region, contract term and exchange rate, and change without notice. Several vendors quote rather than publish, and some price in currencies other than the US dollar, so a converted figure moves with the exchange rate. Confirm current pricing with the vendor before you decide anything.
Trademarks and corrections. All product names and trademarks belong to their respective owners, and are used here for identification and comparison only. Their use does not imply affiliation with or endorsement by those companies. If anything here is out of date or wrong, tell us and we will correct it.
FAQ
What is the best solar proposal software in India? SurgePV for EPCs wanting the design and proposal in one license at a price Indian margins absorb, with Excel over the yield output for industrial CAPEX versus RESCO comparisons.
Why does the state matter so much in an Indian proposal? Because net metering rules, banking arrangements, wheeling charges, and cross-subsidy surcharges are set by state regulators and vary widely. There is no national model to apply.
How should PM Surya Ghar subsidy appear? As a conditional deduction from the gross price with the eligibility requirements and process stated, not as a discount. If the claim fails, the customer owes the difference.
How should industrial tariffs be modelled? By component. Slab-based energy charges, demand charges, and surcharges are affected differently by solar, and a blended per-unit rate overstates the saving.
What is the CAPEX versus RESCO decision? Whether the customer owns the asset or buys power from a developer. It is a financial comparison involving tax treatment, accelerated depreciation, and balance sheet impact, and it belongs in a purpose-built model.
How much does solar proposal software cost in India? From Rs 0 with OpenSolar’s transaction model to roughly Rs 2.6L per user per year at Aurora’s higher tiers, with SurgePV around Rs 1.1L including the design side. Cross-platform math is in our solar design software pricing breakdown.
What about the design software decision separately? Covered in best solar design software in India.
