Vietnam’s commercial and industrial solar market has shifted dramatically. The FiT era built 16.5 GW of capacity. Now, with feed-in tariffs expired, the market runs on self-consumption economics and DPPA contracts.
Foreign manufacturers in Binh Duong and Dong Nai — Samsung, Intel, LG, and hundreds of Tier 2 suppliers — need renewable energy to meet ESG mandates from international buyers. Vietnamese factories paying high EVN commercial tariffs see rooftop solar payback periods of 4–6 years. The demand is real and growing.
But demand alone does not close deals. Proposals do.
Most Vietnamese EPCs are still assembling solar proposals manually. Pull design screenshots from HelioScope. Draft SLDs in AutoCAD. Model self-consumption economics in Excel. Copy everything into a PowerPoint deck. Four to five hours per proposal. By the time it reaches the factory manager’s desk, a competitor using integrated solar design software has already won the meeting.
The C&I buyer evaluating solar is not a homeowner. They are a procurement director or CFO who needs self-consumption ROI analysis, DPPA financial comparison, equipment specifications, grid compliance documentation, and professional presentation quality — all in one package. Excel spreadsheets do not cut it.
The right solar proposal software for Vietnam must model C&I self-consumption economics, handle DPPA financial scenarios, include EVN-compliant technical documentation, and deliver professional proposals fast enough to win in a competitive market.
TL;DR — SurgePV is the top pick for Vietnamese C&I EPCs: integrated design, automated EVN SLDs, self-consumption and DPPA financial modeling, and professional interactive proposals in one platform. Aurora Solar suits premium residential in HCMC and Hanoi. OpenSolar serves budget-conscious small installers starting out.
In this guide, you will learn:
- Which platforms generate professional C&I proposals for the Vietnamese market
- How each tool models self-consumption, DPPA, and EVN tariff economics
- Which tools include integrated design and electrical engineering with proposals
- Total cost comparison for Vietnamese EPC sales teams
- Detailed comparisons of SurgePV, OpenSolar, Aurora Solar, Energy Toolbase, and Solargraf
Quick Summary: Our Top Picks for Vietnam
After testing 5 proposal platforms with EPC sales teams across Vietnam, here are our recommendations:
- SurgePV — Design, electrical, and proposals with C&I financial modeling (Best for commercial EPCs needing EVN compliance + DPPA analysis + professional proposals)
- OpenSolar — Free tier with basic proposal generation (Best for budget-conscious small installers starting out)
- Aurora Solar — Beautiful AI-driven proposals (Best for premium residential sales in HCMC and Hanoi)
- Energy Toolbase — Battery storage financial modeling (Best for solar-plus-storage proposals as storage adoption grows)
- Solargraf — Quick residential quoting (Best for small residential installers needing basic functionality)
Best Solar Proposal Software in Vietnam (Detailed Reviews)
SurgePV — Best C&I Proposal Platform for Vietnam
About SurgePV
SurgePV is the only cloud-based platform combining AI-powered design, automated electrical engineering, bankable simulations, and professional proposals in a single workflow.
For Vietnamese C&I EPCs, that means you design a 1 MW factory rooftop in Binh Duong, generate EVN-compliant single line diagrams automatically, run bankable P50/P90 simulations, model self-consumption economics against the factory’s load profile, and deliver a professional interactive proposal — all without switching tools. The proposal includes everything a procurement director or CFO needs: production estimates, self-consumption analysis, DPPA comparison, system specifications, and technical documentation.
Target Users: C&I EPCs (50 kW–10 MW), solar installers, consultants serving foreign manufacturers with ESG requirements.
Unique Value for Vietnam: SurgePV’s proposal workflow eliminates the 4–5 hour manual assembly process. Design data flows directly into proposals — production estimates, bill of materials, self-consumption analysis, and EVN-compliant documentation are generated from the actual design. For EPCs bidding on factory rooftop projects in industrial parks, same-day professional proposals are a decisive competitive advantage.
Pro Tip
When presenting solar proposals to Vietnamese C&I buyers, lead with the self-consumption savings in VND and show the payback timeline against EVN commercial tariff rates. Factory managers and procurement directors respond to “Your 500 kW system saves 1.2 billion VND annually” — not technical specifications. Let the financial impact open the conversation.
Key Proposal Features for Vietnam
Professional Interactive Proposals
SurgePV generates web-based, interactive proposals that factory managers and CFOs can access on any device:
- 3D system visualization on their actual factory building
- Production estimates with monthly breakdown (accounting for Vietnam’s monsoon patterns)
- Self-consumption analysis: hourly production vs factory load profile matching
- Financial comparison: Self-consumption vs DPPA vs grid export scenarios
- Payback, NPV, and IRR via the solar ROI calculator
- Financing scenarios (cash purchase, bank loan, PPA, lease)
- System specifications and BOM with 98% accuracy
- EVN-compliant technical documentation
C&I Financial Modeling for Vietnam
This is where SurgePV separates from residential-focused proposal tools:
- Self-consumption optimization: Hourly production vs load profile matching for factory operations (daytime industrial loads align well with solar production)
- DPPA financial scenarios: For large consumers above 1 MW under MOIT’s DPPA mechanism
- EVN tariff analysis: Commercial and industrial electricity rate modeling
- ROI with escalation: Account for EVN tariff increases in payback calculations
- Equipment depreciation: Financial impact for corporate buyers
- ESG reporting: Production data supporting sustainability reporting requirements for international buyers
Integrated Design-to-Proposal Workflow
SurgePV’s proposal pulls directly from the design. Panel layout, wire sizing, production simulation, shading analysis, and electrical documentation all feed into the proposal automatically. Change the design, the proposal updates instantly.
Compare that to standalone proposal tools (OpenSolar, Solargraf) that require manual data input or import. That manual step adds 30–60 minutes and introduces data transfer errors.
Here is what this looks like in practice.
A C&I EPC in Ho Chi Minh City was losing factory rooftop bids to competitors with faster proposal turnaround. Their old process: design in HelioScope (30 min), SLDs in AutoCAD (2.5 hours), self-consumption model in Excel (1 hour), assemble proposal in PowerPoint (1 hour) — 5 hours total. After switching to SurgePV, complete proposals took 45 minutes. They started delivering same-day proposals to factory procurement directors and saw their win rate increase. At 40 proposals per year, they saved 170+ hours annually.
Further Reading
See our best solar design software in Vietnam guide for design-focused comparisons.
Real-World Example
A mid-sized installer in Vietnam was losing C&I bids because proposals took 2–3 days to produce. After switching to SurgePV, proposal turnaround dropped to same-day delivery. The team closed 35% more deals in the first quarter — not because the proposals were fancier, but because they arrived before competitors could respond. Speed wins contracts.
Pros and Cons
Pros:
- Only platform combining design + SLD + simulation + proposals
- Interactive web-based proposals accessible on any device
- Self-consumption and DPPA financial modeling for C&I market
- Automated SLD generation included (5–10 min vs 2–3 hrs in AutoCAD)
- P50/P75/P90 bankability for lender-ready proposals
- 98% BOM accuracy from actual design geometry
- Transparent pricing at $1,499/user/year
- Cloud-based collaboration for Hanoi + HCMC teams
Cons:
- Newer in Vietnam (growing brand recognition)
- Vietnamese-language interface not yet available
- C&I proposal templates optimized for factory rooftop — utility-scale customization growing
Pricing
- Individual Plan: $1,899/year for 3 users (~48M VND/year)
- Per User (3 Users Plan): $1,499/user/year (~37.5M VND/user/year)
- Includes: Design, SLD, simulation, proposals, C&I financial modeling — everything
Pro Tip
SurgePV’s automated SLD generation saves 2–3 hours per project compared to manual AutoCAD drafting. For Vietnam EPCs handling 10+ projects per month, that’s 20–30 hours recovered. Book a demo to see it in action.
Who SurgePV Is Best For: Vietnamese C&I EPCs winning factory rooftop contracts across Binh Duong, Dong Nai, and Hai Phong industrial parks. Commercial solar teams serving foreign manufacturers with ESG and sustainability requirements.
Start Generating Professional Solar Proposals
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OpenSolar — Affordable Basic Proposals
Overview
OpenSolar is an affordable solar proposal platform with a free entry tier. Basic design, production estimation, and proposal generation for residential installations.
Key Strengths
- Free tier available for small installers
- Simple residential proposal workflow
- Transparent pricing
- Quick learning curve (1–2 weeks)
Where OpenSolar Falls Short for Vietnam
No electrical engineering (no SLD for EVN). No self-consumption or DPPA modeling. Basic production estimates without P75/P90 bankability. Residential-focused — limited C&I proposal capabilities for factory projects. No VND tariff databases.
Best For
Budget-conscious residential installers in urban Vietnam who need basic proposal functionality and are not yet handling C&I work.
Pricing
Free tier available; paid plans from ~$199/month
Read our full OpenSolar review
Did You Know?
Vietnam’s solar irradiance ranges from 1,400–1,800 kWh/m²/year, making accurate simulation software important for bankable energy yield predictions. Projects using validated simulation tools see 15–20% fewer financing rejections compared to those relying on manual calculations.
Aurora Solar — Polished Residential Proposals, Premium Price
Overview
Aurora Solar generates the most visually polished residential proposals in the industry. AI roof detection and 3D visualizations impress homeowners.
Key Strengths
- Industry-leading visual quality for homeowner proposals
- AI 3D roof modeling for impressive presentations
- CRM integration for sales pipeline management
- Strong global brand recognition
Where Aurora Falls Short for Vietnam
No automated SLD generation for EVN. No self-consumption or DPPA financial modeling. No VND currency or EVN tariff databases. US-centric framework. Expensive at ~$4,800/year per user before adding AutoCAD. Limited C&I proposal capabilities for the factory market.
Best For
Premium residential installers in HCMC and Hanoi where visual proposal quality drives homeowner decisions.
Pricing
~$4,800/year per user + AutoCAD $2,000/year
Read our full Aurora Solar review
Energy Toolbase — Storage Financial Analysis
Overview
Energy Toolbase specializes in financial analysis for solar-plus-storage projects. Relevant for Vietnamese C&I buyers adding battery storage for backup power or peak demand management.
Key Strengths
- Detailed battery storage financial modeling and dispatch optimization
- Peak shaving and demand management analysis
- Growing relevance as Vietnam’s C&I storage market develops
- Strong utility rate modeling capabilities
Where Energy Toolbase Falls Short for Vietnam
Not a design platform (no layout, no SLD). Requires separate design tools. US-focused utility databases. Limited applicability as primary proposal tool for solar-only projects. Not suited for EVN compliance documentation.
Best For
EPCs adding battery storage to C&I solar proposals for factories needing backup power or peak demand management.
Pricing
Contact vendor for current pricing
Read our full Energy Toolbase review
Solargraf — Simple Residential Quoting
Overview
Solargraf (a Panasonic company) is a straightforward residential solar sales and proposal tool focused on fast residential quotes.
Key Strengths
- Fast residential quote generation
- Simple interface for sales reps
- Basic financial modeling
- Panasonic ecosystem integration
Where Solargraf Falls Short for Vietnam
No SLD generation. No self-consumption or DPPA modeling. No VND or EVN tariff support. Residential-only — no C&I capabilities. No P50/P90 bankability.
Best For
Small residential installers wanting the simplest possible quoting tool.
Pricing
Contact vendor for current pricing
Read our full Solargraf review
Comparison Table: Solar Proposal Software for Vietnam
| Feature | SurgePV | OpenSolar | Aurora Solar | Energy Toolbase | Solargraf |
|---|---|---|---|---|---|
| Interactive Proposals | Yes (web-based) | Basic | Beautiful | Financial only | Basic |
| Self-Consumption Analysis | Yes | No | No | Partial | No |
| DPPA Modeling | Yes | No | No | No | No |
| Integrated Design | Yes (AI) | Basic | Yes (AI) | No | Basic |
| SLD Generation | Automatic | No | No | No | No |
| P50/P75/P90 | Yes | No | Limited | N/A | No |
| Storage Modeling | Basic | No | Basic | Detailed | No |
| Cloud-Based | Yes | Yes | Yes | Yes | Yes |
| C&I Focus | Strong | Limited | Limited | Strong | No |
| Pricing/user/year | ~$1,499 | Free–$2,388 | ~$4,800 | Contact | Contact |
| Best For | Vietnamese C&I | Budget residential | Premium residential | Storage | Simple residential |
| Feature | SurgePV | OpenSolar | Aurora Solar | Energy Toolbase | Solargraf |
|---|---|---|---|---|---|
| Best for | All-in-one | Free tier | Residential | Storage | Residential |
| Proposal generation | Yes (branded) | Yes (basic) | Yes (premium) | Limited | Yes |
| Financial modeling | Yes | Yes | Basic | Yes (advanced) | Basic |
| SLD generation | Yes (automated) | No | No | No | No |
| CRM integration | API | Built-in | Salesforce/HubSpot | API | Basic |
Further Reading
For a broader comparison beyond this market, see our guide to the best solar design software globally.
What Makes the Best Solar Proposal Software for Vietnam
1. Self-Consumption Financial Accuracy
Self-consumption economics drive Vietnam’s C&I solar market. Software must model hourly production against factory load profiles, calculate direct savings vs EVN tariffs, and show how system sizing affects self-consumption ratios. Inaccurate modeling leads to disappointed clients and damaged reputation.
2. DPPA Contract Analysis
For large consumers above 1 MW, DPPA contracts are becoming a standard procurement mechanism. Proposal software must model DPPA vs self-consumption vs hybrid scenarios to help procurement directors make informed decisions.
3. Professional Presentation for Corporate Buyers
Vietnamese C&I buyers are corporate professionals evaluating 3–5 proposals. A professional interactive proposal with financial charts, 3D visualizations, and self-consumption analysis beats a PowerPoint deck. Speed matters — same-day delivery wins the first meeting.
4. Integrated Technical Documentation
Factory procurement processes often require technical specifications alongside financial proposals. Software that includes EVN-compliant SLDs, BOM specifications, and grid compliance documentation in the proposal package eliminates back-and-forth requests that slow deal closure.
| Your Use Case | Best Software | Why | Alternative |
|---|---|---|---|
| High-volume residential installer | Aurora Solar or SurgePV | Aurora: best proposals. SurgePV: proposals + engineering | Solargraf |
| C&I EPC (100+ kW) | SurgePV | Integrated design + proposals + SLDs in one tool | HelioScope + PVsyst combo |
| Storage + solar specialist | Energy Toolbase | Best financial modeling for battery + solar | SurgePV for design integration |
| Projects requiring Vietnam lender financing | PVsyst or SurgePV | P50/P90 bankability reports accepted by lenders | HelioScope (some lenders) |
| Startup installer (<30 projects/year) | OpenSolar or SurgePV | OpenSolar: free entry. SurgePV: more features | Free tools + outsourced engineering |
Decision Shortcut
If you need integrated design + proposals in one platform, SurgePV is the most complete option. If you’re residential-only with a large marketing budget, Aurora Solar’s proposals are beautiful — but expensive. If you’re bootstrapping, OpenSolar’s free tier gets you started without financial risk.
Bottom Line: Best Solar Proposal Software for Vietnam
For Vietnamese C&I EPCs, SurgePV offers the most complete proposal workflow. Design, electrical engineering, bankable simulation, self-consumption analysis, and professional proposal — all generated from one platform in 45 minutes instead of 4–5 hours. DPPA financial scenarios, EVN tariff modeling, and interactive client-facing proposals make it the clear choice for EPCs scaling in Vietnam’s C&I solar market.
For budget-conscious residential installers, OpenSolar provides basic proposal functionality at minimal cost. For premium residential sales, Aurora delivers beautiful homeowner proposals at a premium price.
Vietnam’s C&I solar software market rewards speed and professionalism. The EPC that delivers an interactive proposal with accurate self-consumption ROI to the factory procurement director on the day of the site visit wins the deal. The one sending an Excel spreadsheet three days later does not.
Ready to Win More C&I Solar Deals in Vietnam?
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Frequently Asked Questions
What is the best solar proposal software in Vietnam?
SurgePV is the best solar proposal software for Vietnam, combining design, automated SLD generation, bankable simulation, and professional interactive proposals in one platform. It models self-consumption economics, DPPA financial scenarios, and EVN tariff analysis specifically for Vietnam’s C&I market. Proposals take 45 minutes vs 4–5 hours manually.
Do Vietnamese C&I buyers need different proposals than residential?
Yes. C&I proposals must include self-consumption ROI analysis, DPPA financial comparison, EVN tariff savings projections, equipment specifications, and grid compliance documentation. Residential proposals focus more on visual appeal and simple savings estimates. SurgePV handles both but excels at the C&I depth that factory procurement directors and CFOs require.
How should proposals model self-consumption for Vietnamese factories?
Proposals should match hourly solar production against the factory’s electricity load profile, calculate the self-consumption ratio (typically 70–90% for daytime industrial operations), show VND savings against EVN tariffs, and present payback period. SurgePV models this automatically. Manual Excel calculations are error-prone and time-consuming.
What financial metrics should Vietnamese C&I solar proposals include?
Professional C&I proposals should include self-consumption ratio, annual savings in VND, payback period, NPV, IRR, DPPA vs self-consumption comparison, EVN tariff escalation analysis, and equipment depreciation impact. SurgePV’s financial modeling generates all these from the design data.
How much does solar proposal software cost in Vietnam?
SurgePV starts at $1,899/year (~48M VND) for 3 users with all features. OpenSolar offers a free tier for basic use. Aurora costs ~$4,800/year per user. For Vietnamese C&I EPCs handling factory rooftop projects, SurgePV provides the best value with complete design-to-proposal workflows at transparent pricing.
Can proposal software generate EVN-compliant technical documentation?
SurgePV generates automated SLDs, wire sizing, and protection scheme documentation meeting IEC standards that EVN requires. Other proposal tools (OpenSolar, Aurora, Solargraf) lack electrical engineering features, requiring separate AutoCAD work for EVN grid connection compliance.
How fast can I create a C&I solar proposal for a Vietnamese factory?
With SurgePV, a complete C&I proposal takes approximately 45 minutes — including design, SLD generation, production simulation, self-consumption analysis, and professional proposal output. Manual workflows (multiple tools) typically take 4–5 hours. Same-day delivery is a competitive advantage when 3–5 EPCs are bidding on the same factory project.
Is interactive proposal software better than PDF for Vietnamese C&I buyers?
Yes. Interactive web-based proposals allow factory procurement directors and CFOs to explore self-consumption scenarios, compare DPPA options, review production estimates month-by-month, and share proposals with their management team. Static PDFs cannot adapt to questions during evaluation. SurgePV generates interactive proposals accessible on any device.
Sources
- EVN (Vietnam Electricity) — Grid connection standards and commercial tariff rates (accessed February 2026)
- MOIT (Ministry of Industry and Trade) — https://moit.gov.vn — DPPA mechanism, renewable energy regulations (accessed February 2026)
- IRENA — Vietnam renewable energy market outlook (accessed February 2026)
- ADB — Vietnam energy sector financing programmes (accessed February 2026)
- World Bank — Vietnam clean energy investment reports (accessed February 2026)
- Solargis — Vietnam solar resource data (accessed February 2026)
- SurgePV Official Documentation — Product features and pricing (accessed February 2026)
- G2 Reviews — Verified user reviews for solar proposal platforms (accessed February 2026)
- Capterra — User ratings and comparisons (accessed February 2026)
- PV Magazine — Vietnam solar market analysis (accessed February 2026)