TL;DR: SurgePV is the best solar proposal software for Sri Lanka in 2026 — combining design, automated CEB-compliant SLD generation, bankable P50/P90 simulations, and professional interactive proposals in one platform. It models CEB net metering economics, generates proposals in 45 minutes (vs 4–5 hours manually), and delivers the technical documentation CEB requires for grid connection approval. Aurora Solar is the strongest option for premium residential proposals. OpenSolar provides a free entry point for small installers.
Solar demand in Sri Lanka has surged. High commercial electricity tariffs (30–50 LKR/kWh), 1:1 net metering credits through CEB up to 1 MW, and the government’s Soorya Bala Sangramaya programme have created a wave of commercial and residential enquiries that most EPCs struggle to convert.
The bottleneck is not demand. It is the proposal.
Most Sri Lankan EPCs still create proposals in Excel or Word. A typical commercial proposal takes 3–4 hours to assemble — pulling design screenshots from one tool, electrical documentation from AutoCAD, financial calculations from a spreadsheet, and pasting everything into a document that looks unprofessional next to what multinational competitors deliver.
That matters because Sri Lankan commercial buyers — factories in Katunayake, hotels in the Southern Province, offices in Colombo — are evaluating 3–5 EPC proposals. The first EPC to deliver a professional, interactive proposal with accurate financials wins the meeting. The one sending an Excel spreadsheet two days later loses.
The right solar proposal software for Sri Lanka must generate professional client-facing proposals, calculate net metering savings accurately in LKR, include CEB-compliant technical documentation, and close deals faster in a competitive market.
In this guide, you will learn:
- Which platforms generate professional, interactive proposals for the Sri Lankan market
- How each tool models CEB net metering economics and LKR financials
- Which tools include integrated design and electrical engineering with proposals
- Total cost comparison for Sri Lankan EPC sales teams
- Detailed comparisons of SurgePV, OpenSolar, Aurora Solar, Energy Toolbase, and Solargraf
Quick Comparison Table
| Feature | SurgePV | OpenSolar | Aurora Solar | Energy Toolbase | Solargraf |
|---|---|---|---|---|---|
| Interactive Proposals | Yes (web-based) | Basic | Beautiful | Financial only | Basic |
| CEB Net Metering | 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 |
| Pricing/user/year | ~$1,499 | Free–$2,388 | ~$4,800 | Contact | Contact |
Quick Summary: Our Top Picks for Sri Lanka
After testing 5 proposal platforms with EPC sales teams across Sri Lanka, here are our recommendations:
- SurgePV — Design, electrical, and proposals in one platform with financial modeling (Best for commercial EPCs needing CEB compliance + professional proposals)
- OpenSolar — Free tier with basic proposal generation (Best for budget-conscious residential installers starting out)
- Aurora Solar — Beautiful AI-driven proposals for homeowners (Best for premium residential sales in Colombo metro)
- Energy Toolbase — Storage-focused financial modeling (Best for solar-plus-storage proposals as battery adoption grows)
- Solargraf — Quick residential quoting tool (Best for small residential installers needing basic proposal functionality)
Best Solar Proposal Software in Sri Lanka (Detailed Reviews)
SurgePV — Best End-to-End Proposal Platform for Sri Lanka
Best For: Commercial EPCs (50 kW–10 MW), solar installers, sales teams needing fast turnaround on professional proposals
Pricing: $1,899/year for 3 users (~600,000 LKR/year)
Onboarding: 2–3 weeks
SurgePV is the only cloud-based platform combining AI-powered design, automated electrical engineering, bankable simulations, and professional proposals in a single workflow.
For Sri Lankan EPCs, that means you design a 300 kW commercial rooftop in Colombo, generate CEB-compliant single line diagrams automatically, run bankable P50/P90 simulations, and produce a professional client-facing proposal — all without switching tools. The proposal includes everything your commercial client needs: production estimates, financial analysis, system specifications, and technical documentation.
Pro Tip
When presenting solar proposals to Sri Lankan commercial buyers, lead with the net metering savings in LKR and show the payback timeline against current CEB commercial tariff rates. Business owners respond to financial impact — “Your 200 kW system saves 4.8 million LKR annually” closes deals faster than technical specifications.
Key Proposal Features for Sri Lanka
Professional Interactive Proposals
SurgePV generates web-based, interactive proposals that clients can access on any device — phone, tablet, or desktop. The proposal shows:
- 3D system visualization on their actual building
- Production estimates with monthly breakdown (accounting for dual-monsoon patterns)
- Financial analysis with payback, NPV, and IRR via the solar ROI calculator
- Net metering savings calculated against CEB tariff categories
- Financing scenarios (cash purchase, bank loan, PPA)
- System specifications and BOM accuracy at 98%
- CEB-compliant technical documentation
Compare that to a static Excel spreadsheet. Your commercial client in Colombo can explore financing options interactively, share the proposal with their board, and make a decision without scheduling a follow-up meeting.
Sri Lanka Financial Modeling
- Net metering analysis: 1:1 credit value under CEB scheme up to 1 MW
- Commercial tariff savings: Calculations using CEB commercial rates (30–50 LKR/kWh range)
- Self-consumption optimization: Especially important for industrial users operating during peak hours
- Financing options: Cash, loan, lease, and PPA scenarios with local interest rates
- Payback and ROI: Automatic calculation with degradation, maintenance, and tariff escalation
Integrated Design-to-Proposal Workflow
Most proposal software (OpenSolar, Solargraf) requires you to input design data manually or import from another tool. That creates data transfer errors and adds 30–60 minutes to the process.
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, and the proposal updates instantly. No manual data entry. No version control issues.
A commercial EPC in Colombo was losing bids to competitors who delivered proposals faster. Their old process: design in HelioScope (30 min), SLDs in AutoCAD (2.5 hours), financial model in Excel (1 hour), assemble proposal in PowerPoint (1 hour) — total 5 hours per proposal. After switching to SurgePV, the complete workflow dropped to 45 minutes. They started delivering same-day proposals and saw their win rate increase from 20% to 35%.
Pros and Cons
Pros:
- Only platform combining design + SLD + simulation + proposals
- Interactive web-based proposals accessible on any device
- Net metering financial modeling for CEB scheme
- 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
Cons:
- Newer in the Sri Lankan market (growing brand recognition)
- English-language interface (no Sinhala/Tamil yet)
- Proposal templates optimised for commercial — residential customisation is growing
Pricing
- Individual Plan: $1,899/year for 3 users (~600,000 LKR/year)
- Per User (3 Users Plan): $1,499/user/year (~472,000 LKR/user/year)
- Includes: Design, SLD, simulation, proposals, financial modeling — everything
Pro Tip
SurgePV’s automated SLD generation saves 2–3 hours per project compared to manual AutoCAD drafting. For Sri Lanka EPCs handling 10+ projects per month, that’s 20–30 hours recovered. Book a demo to see it in action.
Total Cost vs Multi-Tool Alternative:
- SurgePV: ~600,000 LKR/year (3 users, everything included)
- Aurora + AutoCAD + Excel: ~6,400,000+ LKR/year
- Savings with SurgePV: ~5,800,000 LKR/year
Who SurgePV Is Best For: Sri Lankan commercial EPCs who need professional proposals with CEB-compliant technical documentation and accurate financial modeling. Commercial solar teams winning factory, hotel, and office deals across the Western Province.
Real-World Example
A mid-sized installer in Sri Lanka 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.
Further Reading
See our best solar design software in Sri Lanka guide for design-focused comparisons, and our best solar proposal software global comparison.
OpenSolar — Affordable Residential Proposals
Best For: Budget-conscious residential installers starting with Soorya Bala Sangramaya programme projects
Pricing: Free tier available; paid plans from approximately $199/month
OpenSolar is an affordable solar proposal platform with a free entry tier. It provides basic design, production estimation, and proposal generation for residential solar installations.
Key Strengths:
- Free tier available for small installers
- Straightforward residential proposal workflow
- Transparent pricing with no hidden costs
- Quick learning curve (1–2 weeks)
Where OpenSolar Falls Short for Sri Lanka: No electrical engineering — no SLD generation for CEB, no wire sizing. Limited financial modeling for Sri Lankan market (no CEB tariff databases, limited LKR support). Basic production estimates without P75/P90 bankability. Residential-focused — limited commercial proposal capabilities.
Read our full OpenSolar review
Did You Know?
Sri Lanka’s solar irradiance ranges from 1,200–1,600 kWh/m²/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 (SolarPower Europe Market Outlook).
Aurora Solar — Polished Residential Proposals, Premium Price
Best For: Premium residential installers in Colombo where visual proposal quality drives homeowner decisions
Pricing: ~$4,800/year per user + AutoCAD $2,000/year for SLD generation
Aurora Solar generates the most visually polished residential solar proposals in the industry. AI-powered roof detection creates 3D visualizations that impress homeowners. Integrated CRM manages the sales pipeline from lead to close.
Key Strengths:
- Industry-leading visual quality for homeowner proposals
- AI 3D roof modeling for impressive presentations
- CRM integration for sales pipeline management
- Strong brand recognition globally
Where Aurora Falls Short for Sri Lanka: No automated SLD generation for CEB (needs AutoCAD at $2,000/year). No CEB net metering financial modeling. No LKR currency or Sri Lankan tariff databases. US-centric utility framework. Expensive at approximately $4,800/year per user before adding AutoCAD. Limited commercial proposal capabilities for the C&I market driving Sri Lanka’s growth.
Read our full Aurora Solar review
Energy Toolbase — Battery Storage Financial Analysis
Best For: EPCs offering solar-plus-storage solutions to commercial clients needing backup power or peak demand management
Pricing: Contact vendor for current pricing
Energy Toolbase specialises in financial analysis for solar-plus-storage projects. As battery storage adoption grows in Sri Lanka (commercial backup power, grid instability mitigation), this tool becomes relevant for EPCs offering storage solutions.
Key Strengths:
- Detailed battery storage financial modeling
- Utility rate analysis for storage economics
- Dispatch strategy optimisation for peak shaving
- Growing relevance as Sri Lanka’s storage market develops
Where Energy Toolbase Falls Short for Sri Lanka: Not a design platform — no roof modeling, no SLD generation, no panel layout. Requires separate design tools. US-focused utility databases — no CEB tariff integration. Limited relevance until Sri Lanka’s storage market matures further.
Read our full Energy Toolbase review
Solargraf — Simple Residential Sales Tool
Best For: Small residential installers wanting the simplest possible proposal tool for basic rooftop quotes
Pricing: Contact vendor for current pricing
Solargraf (a Panasonic company) is a straightforward residential solar sales and proposal tool. It focuses on fast residential quotes with simple financial calculations.
Key Strengths:
- Fast residential quote generation
- Simple interface for sales teams
- Basic financial modeling
- Panasonic ecosystem integration
Where Solargraf Falls Short for Sri Lanka: No electrical engineering or SLD generation. No CEB-specific financial modeling. No LKR or Sri Lankan tariff support. Limited to basic residential proposals. No commercial capabilities. No P50/P90 bankability for lender submissions.
Read our full Solargraf review
Comparison Table: Solar Proposal Software for Sri Lanka
| 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 |
| CEB net metering | Yes | No | No | No | No |
| Commercial focus | Strong | Limited | Limited | Strong | No |
| Pricing/user/year | ~$1,499 | Free–$2,388 | ~$4,800 | Contact | Contact |
What Makes the Best Solar Proposal Software for Sri Lanka
1. CEB Net Metering Financial Accuracy
Accurate net metering calculations are the foundation of a credible solar proposal in Sri Lanka. Software must model 1:1 credit under CEB’s scheme, account for self-consumption vs export ratios, and calculate savings against the correct CEB tariff category. Proposals with inaccurate financial projections damage credibility and kill deals.
2. Professional Presentation Quality
Commercial buyers in Colombo evaluate proposals side by side. A professional, interactive proposal with 3D visualizations, financial charts, and technical specifications beats a Word document every time. Speed matters too — same-day delivery wins deals.
3. Integrated Technical Documentation
The best proposals include design data, production estimates, and CEB-compliant electrical documentation in one package. Standalone proposal tools that require manual data import create errors and slow the process. Integrated platforms like SurgePV generate proposals from actual design data.
4. Speed to Proposal
In a competitive market with 3–5 EPCs bidding on every commercial project, the fastest professional proposal wins the first meeting. Software that reduces proposal time from 4–5 hours to 45 minutes gives Sri Lankan EPCs a decisive advantage.
| 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 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.
Sri Lanka Solar Market Context
Sri Lanka’s solar market is growing rapidly. Key factors shaping the market:
Market Drivers:
- High commercial electricity tariffs (30–50 LKR/kWh) making solar payback periods short
- CEB 1:1 net metering up to 1 MW — strong economics for commercial and industrial
- Soorya Bala Sangramaya programme driving residential rooftop adoption
- ADB and World Bank financing programmes supporting renewable energy investment
- Corporate demand for reducing electricity costs and carbon footprint
- Battery storage growing for commercial backup and grid instability mitigation
Market Challenges:
- Economic uncertainty affecting capital investment decisions
- CEB interconnection documentation requirements causing project delays
- Limited local solar software options requiring expensive international tools
- Currency volatility impacting import-dependent equipment pricing
- Grid infrastructure constraints in some regions
Market Structure:
- Residential: Growing under Soorya Bala Sangramaya (5–20 kW typical)
- Commercial/Industrial: Largest growth segment (50 kW–5 MW factories, hotels, offices)
- Utility-scale: Nascent but growing with government targets
- Battery storage: Emerging for commercial backup power
Major solar markets include the Western Province (Colombo metro), Central Province (Kandy), Southern Province (tourism/industrial), and Northern Province (Jaffna).
Bottom Line: Best Solar Proposal Software for Sri Lanka
For Sri Lankan commercial EPCs, SurgePV offers the most complete proposal workflow. Design, electrical engineering, bankable simulation, and professional proposal — all generated from one platform in 45 minutes instead of 4–5 hours. Net metering financial modeling, interactive client-facing proposals, and CEB-compliant documentation make it the clear choice for EPCs scaling in Sri Lanka’s growing 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.
Your proposal is your first impression. In a market where commercial buyers evaluate 3–5 EPCs, the quality and speed of your proposal directly impacts your win rate. Invest in software that delivers professional results fast.
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Frequently Asked Questions
What is the best solar proposal software in Sri Lanka?
SurgePV is the best solar proposal software for Sri Lanka, combining design, automated SLD generation, bankable simulation, and professional interactive proposals in one platform. It models CEB net metering economics, generates proposals in 45 minutes (vs 4–5 hours manually), and includes technical documentation that CEB requires for grid connection approval.
Do I need separate software for proposals and design in Sri Lanka?
Not with SurgePV. Most EPCs use separate tools for design (HelioScope), electrical documentation (AutoCAD), financial modeling (Excel), and proposals (PowerPoint). SurgePV integrates all these workflows, eliminating data transfer errors and reducing proposal time by 70–80%. Standalone proposal tools like OpenSolar or Solargraf still require separate design software.
How should solar proposals model CEB net metering in Sri Lanka?
Proposals should calculate savings based on 1:1 net metering credit under CEB’s scheme, account for self-consumption vs export ratios at the correct CEB tariff category, and show payback period in LKR. SurgePV models these economics automatically. Generic international tools often lack CEB tariff databases, requiring manual spreadsheet calculations.
What financial metrics should Sri Lankan solar proposals include?
Professional proposals should include payback period, net present value (NPV), internal rate of return (IRR), monthly and annual savings in LKR, net metering credit value, and financing comparison (cash vs loan). SurgePV’s financial modeling tool generates all these metrics automatically from the design data.
How much does solar proposal software cost in Sri Lanka?
SurgePV starts at $1,899/year (~600,000 LKR) for 3 users with all features including design, SLD, and proposals. OpenSolar offers a free tier for basic use. Aurora costs approximately $4,800/year per user (plus AutoCAD at $2,000/year for SLD generation). For Sri Lankan EPCs, SurgePV offers the best value with complete workflows at transparent pricing.
Can solar proposal software generate CEB-compliant technical documentation?
SurgePV generates automated SLDs, wire sizing calculations, and protection scheme documentation that meets CEB grid connection requirements. Other proposal tools (OpenSolar, Aurora, Solargraf) do not include electrical engineering features, requiring separate AutoCAD work for CEB compliance.
How fast can I create a solar proposal for a Sri Lankan client?
With SurgePV, a complete commercial proposal takes approximately 45 minutes from start to finish — including design, SLD generation, production simulation, financial modeling, and professional proposal output. Manual workflows (multiple tools) typically take 4–5 hours. Same-day proposal delivery is a competitive advantage in Sri Lanka’s growing solar market.
Is interactive proposal software better than PDF proposals for Sri Lankan clients?
Yes. Interactive web-based proposals allow Sri Lankan commercial clients to explore financing scenarios, review production estimates month-by-month, and share proposals with their board or finance team. SurgePV generates interactive proposals accessible on any device. PDF proposals are static and cannot adapt to client questions during the evaluation process.
Related Guides
Best Solar Software (2026) — Complete platform comparison · OpenSolar Review — Free proposal tool analysis · Solargraf Review — Residential proposal features