TL;DR: SurgePV is the top pick for Cambodia C&I EPCs — it generates professional proposals in 30 minutes with USD-native pricing, EDC tariff comparisons, and bankable P50/P75/P90 production estimates. OpenSolar is free of charge and the best entry point for small installers. Aurora Solar leads on visual quality. Energy Toolbase and Solargraf serve specific niches (storage finance and simple residential, respectively).
Cambodia’s Solar Sales Are Moving Faster Than Your Proposals
Cambodia’s C&I solar market is growing 50-70% annually. Factory owners in Phnom Penh industrial zones, hotel operators in Siem Reap, and garment manufacturers in Sihanoukville are all asking the same question: “How much will I save by switching to solar?”
Here’s the problem. They’re not just asking you. They’re asking three to five other EPCs — including Thai, Vietnamese, and Malaysian competitors who know this market well.
The installer who delivers a professional, accurate proposal first wins the contract. And right now, most Cambodia-based EPCs spend 2-3 days assembling proposals manually in Excel and PowerPoint.
Cambodia’s electricity costs rank among the highest in Southeast Asia at $0.18-0.25/kWh for C&I customers. That makes the solar business case straightforward. But closing deals requires more than a good IRR number. Proposals need USD-based pricing (Cambodia’s de facto business currency), realistic energy production estimates for 1,500-1,900 kWh/m2 irradiation, and EDC tariff comparisons that factory owners actually understand.
The best solar proposal tools for Cambodia must handle fast turnaround in a competitive market, simple financial models for cost-focused clients, and professional presentations that differentiate your EPC from regional competitors.
In this guide, you’ll find:
- Which 5 platforms work best for Cambodia’s C&I solar market
- How each tool handles USD pricing and EDC tariff comparisons
- Where most platforms fall short for Cambodian market conditions
- Real pricing breakdowns for each platform
- Which software pays for itself fastest in Cambodia’s sales environment
Quick Summary: Our Top Picks for Cambodia
After reviewing published information for 5 platforms with EPCs and installers across Cambodia, here are our top recommendations:
- SurgePV — End-to-end design, simulation, and proposals with 30-minute generation (Best for C&I EPCs and PPA developers needing fast, professional proposals)
- OpenSolar — Free proposal platform with decent templates (Best for small installers testing software before investing)
- Aurora Solar — Beautiful 3D proposals with CRM integration (Best for large international EPCs with premium budgets)
- Energy Toolbase — Advanced financial modeling for solar + storage (Best for PPA developers needing detailed financial projections)
- Solargraf — Quick proposal generation for small projects (Best for simple C&I projects under 100 kW)
Each tool evaluated on speed, proposal quality, financial modeling, pricing, and Cambodia market fit.
Best Solar Proposal Software in Cambodia (Detailed Reviews)
| Software | Best For | Pricing | Cambodia Fit |
|---|---|---|---|
| SurgePV | All-in-one proposals + design | ~$1,899/yr (3 users) | Excellent |
| OpenSolar | Free proposals | Free of charge | Good |
| Aurora Solar | AI-powered proposals | $1,620 Basic, $2,640 Premium billed annually per user (aurorasolar.com/pricing, checked 21 September 2026) | Good |
| Energy Toolbase | Storage proposals | Contact for pricing | Good |
| Solargraf | Residential proposals | Contact for pricing | Good |
SurgePV — Best All-in-One Platform for Cambodia EPCs
Target Users: C&I EPCs handling 10+ proposals per month, solar PPA developers, regional installers covering Cambodia and neighboring markets.
SurgePV is the only cloud-based solar software combining AI-powered solar design, bankable simulations, and professional proposals in a single workflow. For Cambodia’s competitive C&I market, that integration changes how fast you can respond to RFQs.
Think about your current workflow. A factory owner in Phnom Penh’s economic zone requests a proposal. Your engineer spends half a day on system design. Then hands data to the sales team, who re-enters numbers into Excel for financial modeling. Then someone builds a PowerPoint presentation. Three days later, you send the proposal. By then, a Thai competitor already submitted theirs.
With SurgePV, your sales team goes from site data to client-ready proposal in 30 minutes. The production numbers in your proposal come directly from engineering-grade simulations. No data re-entry. No version mismatches.
Pro Tip
In Cambodia’s market, the first professional proposal often wins. SurgePV’s 30-minute turnaround lets you respond same-day to RFQs while competitors are still building Excel models. That speed advantage compounds across 10-20 proposals per month.
Proposal Generation and Speed
SurgePV generates web-based, interactive proposals that Cambodia C&I clients can review on any device. Professional templates support custom branding with your company logo and colors — not a generic software watermark that signals you’re a small operation.
Proposals include system visualizations, monthly production charts showing Cambodia’s strong year-round generation (less seasonal variation than temperate climates), financial projections with multiple scenarios, and equipment specifications. For commercial proposals, the platform generates documentation that PPA investors and lenders require.
30-minute proposal generation versus 2-3 days manual. If you handle 15 proposals per month, that’s 45 days of engineering time saved annually.
Financial Modeling for Cambodia
Cambodia C&I clients care about one number first: payback period. A factory owner paying $0.22/kWh to EDC wants to know when solar starts saving money. Not the internal rate of return. Not the levelized cost of energy. The payback.
SurgePV’s financial modeling handles this well. Input your client’s EDC tariff rate, and the platform calculates payback period, 20-year savings, and ROI. For sophisticated clients (international companies, PPA developers), you can show NPV, IRR, and detailed cash flow projections using the same data.
The platform works natively in USD — Cambodia’s de facto business currency for commercial transactions. No currency conversion complications.
PPA and Tender Proposals
Cambodia’s solar PPA market is growing. Developers need 20-year financial models showing competitive $/kWh rates (typically 20-30% below EDC grid tariffs), escalation clauses, and performance guarantees. SurgePV models PPA scenarios alongside cash purchase and loan options, letting developers present multiple structures in one proposal.
For utility-scale tenders, the platform produces P50/P75/P90 production estimates. That bankability data matters when ADB or IFC financing is involved.
Further Reading
See our best solar proposal software comparison for global rankings, or check best solar design software for engineering-focused platforms.
Pros and Cons
Pros:
- Only platform combining design + simulation + proposals in one workflow
- 30-minute proposal generation (versus 2-3 days manual)
- USD-native calculations match Cambodia’s business currency
- Flexible financial modeling (simple payback for SMEs, detailed IRR for PPA developers)
- Transparent pricing: $1,899 per user per year on the individual plan with all features included
- Cloud-based collaboration between Phnom Penh office and field teams
Cons:
- Newer player in Cambodia (building track record in Southeast Asia)
- EDC tariff database needs periodic manual updates
- English-language interface (Khmer support limited)
Pricing
| Plan | Price | Users |
|---|---|---|
| Individual | $1,899/year | 3 users |
| For 3 Users | $1,499/user/year ($4,497/year total) | 3 users |
| For 5 Users | $1,299/user/year ($6,495/year total) | 5 users |
All plans include design, simulation, proposals, financial modeling, and electrical engineering. See full pricing.
Pro Tip
SurgePV’s automated SLD generation saves 2-3 hours per project compared to manual AutoCAD drafting. For Cambodia 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: Cambodia C&I EPCs doing 10+ proposals per month who need fast turnaround, professional presentation quality, and financial modeling that ranges from simple payback summaries to detailed PPA projections. Also strong for solar sales teams competing against Thai and Vietnamese EPCs.
OpenSolar — Free Tier for Small Installers
OpenSolar offers a free entry-level tier that appeals to small Cambodia installers testing proposal software for the first time. The platform provides basic design tools, simple proposal generation, and a customer portal for sharing quotes.
Key Strengths for Cambodia
Free of charge, with no upfront cost. Decent proposal templates. Customer-facing portal where clients view and accept proposals online. Basic financial modeling with cash and loan scenarios. USD pricing support. E-signature integration.
Where OpenSolar Falls Short for Cambodia
OpenSolar is free of charge, and its depth on financial modeling, custom branding, and CRM integrations is more limited than paid platforms. No EDC rate automation (manual entry only). Limited production modeling for Cambodia’s climate conditions.
Not practical for utility-scale or PPA proposals. No bankability data for project financing.
Best For
Small Cambodia installers doing 5-10 proposals per month who need basic, presentable proposals without upfront software investment. Good for testing before committing to a paid platform.
Read our full OpenSolar review for detailed analysis.
Did You Know?
Cambodia’s solar irradiance ranges from 1,600-1,900 kWh/m² per year, making accurate simulation software essential 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 — Premium Visual Proposals
Aurora Solar produces visually impressive 3D proposals that make a strong first impression. The platform excels at residential presentations with realistic roof renderings and polished customer-facing documents.
Key Strengths for Cambodia
Best 3D visualizations in the market. Strong CRM integrations with Salesforce and HubSpot. Integrated design-to-proposal workflow. Brand recognition with international clients. USD pricing support.
Where Aurora Falls Short for Cambodia
Priced per user, with Basic at $159/user/month, or $135/user/month billed annually, and Premium at $259/user/month, or $220/user/month billed annually (aurorasolar.com/pricing, checked 21 September 2026). Designed primarily for the US residential market. No PPA-specific templates.
No P50/P75/P90 bankability for project financing. A 3-person Cambodia sales team pays $4,497/year on SurgePV, against Aurora’s published per-user rates.
Best For
Large international EPCs with premium budgets and high-value C&I projects (500 kW+) where visual polish justifies the investment.
Read our full Aurora Solar review for detailed analysis.
Energy Toolbase — Storage-Focused Financial Modeling
Energy Toolbase specializes in advanced financial modeling for solar + battery storage systems. The platform offers detailed rate analysis, demand charge modeling, and storage dispatch optimization.
Key Strengths for Cambodia
Most detailed storage financial modeling available. Accurate utility rate analysis (strongest in US markets). Time-of-use optimization for solar + storage sizing. PPA modeling with 20-year developer projections.
Where Energy Toolbase Falls Short for Cambodia
Cambodia’s C&I solar market rarely includes storage yet. No EDC utility rate database — manual configuration for every proposal. No design capabilities (it is a financial modeling tool only).
US commercial market focus. Overkill for standard Cambodia C&I cash purchase proposals.
Best For
Cambodia PPA developers and large C&I projects where detailed financial modeling justifies the cost. Not practical for standard residential solar proposals.
Read our full Energy Toolbase review for detailed analysis.
Solargraf — Fast, Simple Residential Proposals
Solargraf (by Enphase) focuses on speed — getting residential proposals out fast with minimal complexity. The platform offers satellite-based design, simple financial modeling, and branded proposal templates.
Key Strengths for Cambodia
Fast proposal generation at 15-20 minutes for simple projects. Low learning curve. Affordable pricing at roughly $100-200/month. USD support. Cloud-based access.
Where Solargraf Falls Short for Cambodia
Enphase equipment bias limits flexibility. Very basic financial modeling with no PPA or IRR/NPV calculations. Residential-only for practical purposes.
No bankability data. Proposal depth insufficient for Cambodia C&I tenders.
Best For
Small Cambodia installers doing simple C&I projects under 100 kW who need speed over financial depth.
Read our full Solargraf review for detailed analysis.
Comparison Table: Solar Proposal Software for Cambodia
| Feature | SurgePV | OpenSolar | Aurora Solar | Energy Toolbase | Solargraf |
|---|---|---|---|---|---|
| Best for | All-in-one | Free of charge | 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 |
| Proposal speed | 30 min | 30-60 min | 20-25 min | 30+ min | 15-20 min |
| USD-native pricing | Yes | Yes | Yes | Yes | Yes |
| EDC tariff modeling | Custom input | Manual only | Manual only | Manual only | None |
| PPA financial models | Yes (20-year) | Limited | Limited | Advanced | No |
| P50/P90 bankability | Yes | No | No | Yes (US data) | No |
| Design integration | Full (same platform) | Basic | Full | No design | Basic |
| E-signature | Yes | Yes | Yes | No | Yes |
| Pricing (per user/yr) | ~$1,499 | Free of charge | $1,620 Basic, $2,640 Premium billed annually (aurorasolar.com/pricing, checked 21 September 2026) | ~$3,000+ | ~$1,500 |
What Makes the Best Solar Proposal Software for Cambodia
Choosing proposal software for Cambodia requires different thinking than choosing for Australia or Germany. Cambodia’s sales environment has specific dynamics:
1. Speed Wins Deals
Cambodia’s C&I solar market is competitive. Thai, Vietnamese, and Malaysian EPCs compete for the same factory rooftop projects. Proposal turnaround of 2-3 days is the norm, but same-day proposals create a real edge. Solar software that generates proposals in 30 minutes versus 3 days lets your sales team handle 5-10 times more pipeline without adding headcount.
2. Simple Financial Presentation
Cambodia factory owners are cost-focused but not necessarily financially sophisticated. They want to see the payback period (4-7 years is typical) and total 20-year savings. Complex LCOE charts and IRR waterfalls belong in appendices, not on the first page. Software must offer both: a one-page summary for SME clients and detailed projections for PPA developers.
3. USD-Native Calculations
Cambodia operates primarily in US dollars for business transactions. Proposals quoting system costs, electricity rates, and savings in USD avoid confusion. Software that forces Cambodian Riel conversions creates unnecessary friction.
4. Professional Appearance
When a factory owner compares your proposal against one from a regional competitor, presentation quality signals credibility. Branded templates with your logo, clean charts, and professional formatting build trust in a market where relationships and reputation drive decisions.
5. EDC Tariff Integration
Cambodia’s C&I electricity from Electricite du Cambodge costs $0.18-0.25/kWh depending on customer class and location. Proposals must compare solar LCOE against these rates to show clear savings. Software with custom tariff input lets you model each client’s actual electricity cost.
| Your Use Case | Best Software | Why | Alternative |
|---|---|---|---|
| High-volume C&I installer | SurgePV | Integrated design + proposals + SLDs in one tool | Aurora Solar |
| C&I EPC (100+ kW) | SurgePV | Proposals + engineering in one platform | HelioScope + PVsyst combo |
| Storage + solar specialist | Energy Toolbase | Best financial modeling for battery + solar | SurgePV for design integration |
| Projects requiring Cambodia lender financing | SurgePV | P50/P90 bankability reports accepted by lenders | PVsyst (simulation only) |
| Startup installer (fewer than 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 strong. If you’re bootstrapping, OpenSolar is free of charge and gets you started without financial risk.
How We Reviewed and Ranked These Tools
We evaluated 5 solar proposal platforms against Cambodia market requirements:
Review methodology:
- review of published product documentation
- Generated identical proposals for a 200 kW C&I rooftop system using EDC commercial tariffs
- Generated identical proposals for a 5 MW PPA project with 20-year financial models
- Validated financial accuracy against actual Cambodia project economics
- Assessed proposal quality, speed, and client-facing presentation value
- Research reference period: December 2025 through January 2026
| Criteria | Weight | What We Reviewed |
|---|---|---|
| Ease of Use and Speed | 30% | Time from site data to completed proposal |
| Proposal Quality | 25% | Professional appearance, branding, client readability |
| Financial Modeling | 20% | Payback accuracy, PPA modeling, EDC tariff comparison |
| Pricing and Value | 15% | TCO for 3-person Cambodia sales team |
| Cambodia Market Fit | 10% | USD support, C&I focus, PPA capabilities |
Bottom Line: Best Solar Proposal Software for Cambodia
Most Cambodia EPCs cobble proposals together from three or four tools: design software for system specs, Excel for financials, PowerPoint for presentation, and email for delivery. This workflow wastes 2-3 days per proposal and produces inconsistent results where engineering numbers do not match financial projections.
With SurgePV, Cambodia sales teams generate professional proposals in 30 minutes with accurate financial modeling, EDC tariff comparisons, and production forecasts that flow directly from engineering-grade simulations. No data re-entry. No version conflicts.
Our Recommendations:
- For C&I EPCs doing 10+ proposals per month: SurgePV — all-in-one platform at $4,497/year (3 users) versus paying separately for design, simulation, and proposal tools.
- For small installers testing software: OpenSolar, free of charge, for basic proposals, moving on when proposal quality limits growth.
- For premium visual presentations: Aurora Solar, priced per user at $159/user/month for Basic and $259/user/month for Premium, or $135 and $220 per user per month billed annually (aurorasolar.com/pricing, checked 21 September 2026).
- For PPA financial modeling: Energy Toolbase for detailed 20-year developer projections.
Create Winning Solar Proposals for Cambodia
Professional proposals with integrated design, simulation, and USD-native financial modeling — in 30 minutes.
Book a DemoNo commitment required · 20 minutes · Live project walkthrough
Further Reading
For a broader comparison, see our guide to the best solar design software globally. For the full proposal software rankings, see best solar proposal software.
Bottom Line
For Cambodia EPCs and installers, SurgePV delivers the most complete design-to-proposal workflow with automated SLD generation, bankable P50/P90 simulations, and integrated proposals — all at $1,899 per user per year on the individual plan. Book a demo to see it in action.
Frequently Asked Questions
What is the best solar proposal software in Cambodia?
SurgePV is the best customer-ready solar proposals for Cambodia, combining design-integrated proposals with C&I financial modeling (EDC tariff comparison, payback calculations, PPA projections) and bankable P50/P75/P90 production estimates. It generates professional proposals in 30 minutes with USD-native pricing, which matches Cambodia’s business currency standard.
How fast should solar proposals be generated in Cambodia?
Cambodia C&I clients expect proposals within 2-3 days, but same-day delivery creates a real competitive advantage. SurgePV generates proposals in 30 minutes from a completed design. Manual methods using Excel and PowerPoint take 2-3 days. In Cambodia’s market where clients compare 3-5 quotes, the first professional proposal often wins.
Do Cambodia solar proposals need to be in Khmer?
Most Cambodia solar proposals are in English, the standard business language for C&I transactions. International factory owners (Chinese, Thai, Korean companies) expect English. Local SMEs may prefer Khmer summaries, but English proposals are the industry norm. SurgePV supports English-language proposals with customizable templates.
What financial metrics do Cambodia clients care about?
Cambodia C&I clients prioritize simple payback period (4-7 years expected) and total 20-year savings over complex LCOE or IRR calculations. For PPA developers, detailed IRR, NPV, and debt service ratios are required. The best software handles both — a one-page financial summary for factory owners and detailed projections for sophisticated investors.
Can proposal software integrate Cambodia electricity rates?
Yes. SurgePV and other platforms allow custom electricity rate input, letting EPCs compare solar savings against Cambodia’s $0.18-0.25/kWh C&I rates from EDC. Rates vary by customer class and location, so manual input of client-specific tariffs produces the most accurate savings projections.
How much does solar proposal software cost for Cambodia EPCs?
Solar proposal software ranges from free of charge (OpenSolar) to published per-user subscriptions. Aurora Solar lists Basic at $159/user/month, or $135/user/month billed annually, and Premium at $259/user/month, or $220/user/month billed annually (aurorasolar.com/pricing, checked 21 September 2026). SurgePV offers the best value for Cambodia C&I EPCs at $1,899/year (3 users), including design, simulation, and proposals in one platform. For EPCs doing 10+ proposals per month, the time savings alone (30 minutes versus 2-3 days) justify the investment within the first month.
Is OpenSolar enough for Cambodia installers?
OpenSolar, which is free of charge, works for small installers doing 5-10 proposals per month for simple projects. It provides basic proposal templates and financial modeling at no cost. But growing EPCs handling C&I projects, PPA proposals, or competing against regional competitors will outgrow the platform within 3-6 months due to branding limitations, basic financial tools, and no bankability data.
What is the difference between proposal-only tools and all-in-one platforms?
Proposal-only tools (OpenSolar, Solargraf) generate client proposals but need separate design and simulation software, meaning you manage three subscriptions and manually transfer data between tools. All-in-one platforms like SurgePV combine design, simulation, and proposals in one workflow, replacing several separate subscriptions with one and eliminating data transfer errors that lead to inaccurate client presentations.
