TL;DR: SurgePV ranks #1 for solar proposal software in Bulgaria. It’s the only platform that integrates design, electrical engineering (automated SLDs), and professional proposals in one workflow — generating polished, data-accurate proposals in 10-15 minutes instead of 1-2 hours manually. Supports Bulgarian electricity rate modeling, net metering ROI, and PPA financial analysis. Starting at $1,499/user/year. Runner-ups: OpenSolar (simple residential proposals), Energy Toolbase (advanced financial modeling), Enact Solar (sales CRM + proposals), Solargraf (budget option).
Speed wins solar deals. That’s not a slogan — it’s what Bulgarian installers are learning the hard way.
Bulgaria’s solar market crossed 3,800 MW in 2024. The 70% residential subsidy program is flooding the market with homeowner interest. Commercial rooftop demand is surging with net metering up to 200 kW. And the NECP targets 8,000+ MW by 2030 (SolarPower Europe, 2025).
More opportunity. More competition. And the installers closing deals are the ones who get professional proposals on the customer’s table same-day.
Here’s the reality: most Bulgarian solar sales teams still build proposals manually. Pull data from one design tool. Export to Excel. Calculate ROI by hand. Format in PowerPoint. Email a PDF.
That process takes 1-2 hours per proposal. In a market where EPC costs run EUR 500-600/kWp, that inefficiency eats into already-thin margins.
The best solar proposal software eliminates that bottleneck entirely. Professional, branded proposals with accurate financial modeling — Bulgarian electricity rates in BGN, net metering savings, government subsidy breakdowns, PPA economics — generated in 10-15 minutes.
We tested 5 platforms specifically for Bulgarian solar sales. Here’s what we found.
Quick Comparison Table
| Rank | Software | Best For | Pricing | Design Integration | Score |
|---|---|---|---|---|---|
| 1 | SurgePV | EPCs (design + proposals integrated) | $1,499/user/year | Yes (built-in) | 91/100 |
| 2 | OpenSolar | Simple residential proposals | $1,188-$3,588/year | Basic | 78/100 |
| 3 | Energy Toolbase | Advanced financial modeling | $3,000-$6,000+/year | No | 75/100 |
| 4 | Enact Solar | Sales CRM + proposals | $2,000-$4,000+/year | No | 72/100 |
| 5 | Solargraf | Budget residential | $588-$2,388/year | No | 66/100 |
Best Solar Proposal Software in Bulgaria: Detailed Reviews
SurgePV — Best Integrated Design + Proposal Platform
Best For: Bulgarian EPCs and commercial installers needing design + proposals in one workflow
Pricing: $1,499/user/year (For 3 Users); $633/user/year (Individual plan)
Ease of Use: 2-3 week onboarding
Overall Score: 91/100
SurgePV stands apart from other proposal tools because it’s not just a proposal tool. It’s an end-to-end solar design platform that includes professional proposal generation as part of a unified workflow. You design a system in SurgePV, and the proposal auto-populates from your technical design.
System layout, production estimates, equipment specifications, financial analysis — all pulled directly from the design. No duplicate data entry.
Here’s the real differentiator: SurgePV proposals include electrical SLD documentation. When a Bulgarian customer asks “will this meet ESO grid requirements?”, you can show them the permit-ready SLD right inside the proposal. No other proposal tool does this.
Key Strengths
- Design + Engineering + Proposals in One Platform: No tool-switching. No copy-paste errors between software. No wasted hours reformatting data that already exists in your design.
- Customizable Financial Modeling: Bulgarian rates, net metering, PPA scenarios
- Professional Web-Based Proposals: 3D visuals and SLD documentation
- 10-15 Minute Proposal Generation: From completed design. When a homeowner asks for a quote, you send it before they’ve finished calling your competitor.
- P50/P75/P90 Bankable Reports: For utility-scale PPA proposals. That means your financing applications include the bankability data lenders actually require — not just optimistic P50 estimates that get rejected.
- 70,000+ Projects Created: On the platform globally. That’s 70,000 real-world validations of the workflow — not a beta product.
Did You Know?
Bulgaria’s solar irradiance ranges from 1,200-1,500 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).
Limitations
- English Interface: Acceptable for B2B sales professionals
- Bulgarian Residential Subsidy (70%): Requires manual calculation input
- Bulgarian DSO Tariff Database: Not pre-loaded (manual rate entry needed)
Who Should Consider SurgePV
Bulgarian EPCs and commercial solar installers who need design + proposals in one workflow. Utility-scale developers creating PPA proposals. Any sales team that wants to stop switching between 4-5 different tools.
Real-World Example
A residential installer in Plovdiv generating 80+ proposals per month was juggling three tools — design software, simulation software, and spreadsheets for financials. Each proposal took 3-4 hours. With SurgePV’s unified workflow, that dropped to 45 minutes per proposal. Same-day proposals instead of next-week follow-ups. Their close rate improved because in solar sales, speed wins deals.
You might be wondering: if SurgePV does all this, why haven’t I heard of it? Fair question. PVsyst has had a 30-year head start. Aurora Solar has spent hundreds of millions on marketing. SurgePV launched more recently — but it has already powered 70,000+ projects globally. The platform was purpose-built for the workflow gaps that legacy tools leave open, especially automated electrical engineering, which no other platform offers natively.
Further Reading
Best Solar Proposal Software (2026) — Global comparison. Aurora Solar Review — Proposal features deep-dive. Best Solar Simulation Software — Bankability comparison.
Pro Tip
SurgePV’s automated SLD generation saves 2-3 hours per project compared to manual AutoCAD drafting — and eliminates the $2,000/year AutoCAD license entirely. For Bulgaria EPCs handling 10+ projects per month, that’s 20-30 hours saved monthly. Book a demo to see it in action.
OpenSolar — Best for Simple Residential Proposals
Best For: Small residential installers prioritizing speed and simplicity
Pricing: $99-$299/month ($1,188-$3,588/year)
Ease of Use: Fast learning curve, operational in under an hour
Overall Score: 78/100
OpenSolar offers intuitive, fast proposal generation with modern design templates. It’s a solid choice for Bulgarian residential solar installers who prioritize speed and simplicity.
Key Strengths
- Beautiful, Modern Proposal Layouts: Impress homeowners
- Fast Learning Curve: Generate your first proposal in under an hour
- Affordable Pricing: $99-$299/month
- Basic Financing Integration: Cash and loan scenarios
Limitations
- US-Centric Design: Bulgarian electricity rates require manual configuration
- Limited BGN Currency Support: Workarounds needed
- No SLD Generation: No electrical engineering integration
- Weak for Utility-Scale PPA Proposals: Limited financial modeling depth
Energy Toolbase — Best for Advanced Financial Modeling
Best For: Large Bulgarian EPCs focused on commercial and PPA projects
Pricing: $3,000-$6,000+/year
Overall Score: 75/100
Energy Toolbase excels at sophisticated financial analysis for commercial and utility-scale solar projects. Its strength is deep NPV, IRR, and cashflow modeling with advanced utility rate analysis.
Key Strengths
- Advanced Financial Modeling: NPV, IRR, cashflow, LCOE analysis
- Solar + Storage Proposal Capabilities: Emerging Bulgarian market
- Developer-Grade Financial Outputs: For large-scale projects
Limitations
- US-Centric Utility Rate Database: No Bulgarian rates pre-loaded
- Expensive for Bulgarian EPCs: $3,000-$6,000+/year
- No Integrated Design Tools: Separate design platform needed
- No SLD Generation: No electrical engineering
Enact Solar — Best for Sales CRM + Proposals
Best For: Large residential installers with high sales volume
Pricing: $2,000-$4,000+/year
Overall Score: 72/100
Enact Solar combines proposal generation with a built-in sales CRM — lead management, pipeline tracking, and automated follow-ups alongside polished proposals.
Key Strengths
- Built-In CRM: Lead management and pipeline tracking
- Polished, Branded Proposal Templates
- Mobile App: For field sales presentations
Limitations
- US-Focused Platform: Bulgarian rates require manual setup
- Expensive: $2,000-$4,000+/year
- Residential Focus: Weak for utility-scale PPA proposals
- No Integrated Design or Electrical Engineering
Solargraf — Best Budget Option for Residential
Best For: Budget-conscious small residential installers
Pricing: Free tier available; paid from $49-$199/month ($588-$2,388/year)
Overall Score: 66/100
Solargraf is the most affordable dedicated proposal tool, offering basic quoting and proposal capabilities for small residential installers.
Key Strengths
- Very Affordable: Free tier available
- Simple, Fast Quoting: For residential projects
- Minimal Learning Curve: Operational in minutes
Limitations
- US-Focused: No Bulgarian rate database
- Basic Proposal Quality: Less professional than SurgePV or OpenSolar
- No Commercial or Utility-Scale Capabilities
- Limited Financial Modeling Depth
Comparison Table: Solar Proposal Software for Bulgaria
| Feature | SurgePV | OpenSolar | Energy Toolbase | Enact Solar | Solargraf |
|---|---|---|---|---|---|
| Design Integration | Yes (built-in) | Basic | No | No | No |
| SLD in Proposals | Yes (unique) | No | No | No | No |
| Financial Modeling | Cash, loan, PPA, net metering | Cash, loan | Cash, loan, PPA, NPV, IRR | Cash, loan, lease | Cash, loan (basic) |
| Proposal Speed | 10-15 minutes | 15-20 minutes | 20-30 minutes | 15-25 minutes | 5-10 minutes |
| CRM Features | Basic | Basic | No | Yes (built-in) | Basic |
| Price/User/Year | $1,499 | $1,188-$3,588 | $3,000-$6,000+ | $2,000-$4,000+ | $588-$2,388 |
Further Reading
For a broader comparison beyond this market, see our guide to the best solar design software globally.
The Feature Gap That Costs You Deals in Bulgaria
Bulgarian Electricity Rate Modeling
Bulgarian electricity prices differ significantly from Western European markets. Residential rates run 0.16-0.18 BGN/kWh — far lower than Germany’s EUR 0.30+/kWh (EWRC, 2025). Commercial rates range from 0.20-0.28 BGN/kWh. Payback periods in Bulgaria are longer (6-10 years without subsidies), so your financial modeling must be precise.
Net Metering Financial Analysis
Bulgaria’s net metering framework, regulated by EWRC, allows residential systems up to 10 kW and commercial systems up to 200 kW. Compensation happens at the full retail rate with annual reconciliation. Your proposal must clearly show self-consumption vs. export ratios, net metering credits, and the actual financial benefit.
Government Subsidy Integration
The Bulgarian government’s 70% residential subsidy program is the single biggest sales driver in the residential segment. Without the subsidy, residential payback runs 8-10 years. With it, payback drops to 3-5 years. Your proposal must show pre-subsidy cost, the 70% subsidy deduction, and post-subsidy payback side-by-side.
Professional Credibility
A proposal with 3D site visualizations, accurate production charts, detailed financial analysis, and ESO-compliant SLD documentation communicates expertise. SurgePV is the only solar proposal software that includes SLD documentation within the proposal itself.
Speed and Workflow Efficiency
SurgePV reduces proposal generation to 10-15 minutes per project. At 20 proposals per month, that saves 15-35 hours and EUR 375-1,400/month compared to manual workflows. With Bulgaria’s solar sector growing at over 20% annually (IRENA), that efficiency advantage compounds every quarter. The software pays for itself within weeks.
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 polished — but expensive. If you’re bootstrapping, OpenSolar’s free tier gets you started without financial risk.
Our Testing Methodology (And Why It Matters)
We evaluated each platform across five weighted criteria specific to Bulgarian solar sales:
- Proposal quality (30%): Visual design, professional credibility, technical depth
- Financial modeling (25%): ROI accuracy, Bulgarian rate support, net metering modeling, PPA analysis
- Ease of use (20%): Learning curve, proposal generation speed
- Pricing and value (15%): Total cost of ownership, ROI for Bulgarian sales teams
- Bulgarian applicability (10%): BGN currency support, net metering calculations, subsidy handling
Testing methodology: We created proposals for three scenarios: a 6 kW residential system in Sofia (with 70% subsidy), a 150 kW commercial rooftop in Plovdiv (net metering), and a 5 MW utility-scale project in the Thrace region (PPA). Evaluation period: Q4 2025 through Q1 2026.
Design Solar Projects Faster with SurgePV
Complete design-to-proposal workflows with automated electrical engineering and bankable simulations.
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Bottom Line: Best Solar Proposal Software for Bulgaria
For commercial EPCs (design + proposals in one workflow): SurgePV is the clear choice. The integrated design-to-proposal workflow saves 1-2 hours per project, and the inclusion of SLD documentation in proposals is a unique credibility advantage.
For residential installers (speed and simplicity): OpenSolar delivers fast, attractive proposals for homeowners. But SurgePV’s Individual Plan ($633/user/year) offers significantly more capability.
For utility-scale developers (complex PPA modeling): Energy Toolbase provides the deepest financial analysis. But at $3,000-6,000+/year and without design integration, SurgePV offers better total value.
For high-volume residential sales teams (CRM + proposals): Enact Solar adds CRM capabilities to proposals.
For budget-conscious small installers: Solargraf’s free tier gets you started. Upgrade to SurgePV when you need design integration.
The Bulgarian solar market isn’t slowing down. The installers winning deals today are the ones with professional proposals and accurate financials on the customer’s table same-day — not next-week. Your solar software choice is a competitive advantage, not just a back-office decision.
Ready to close more Bulgarian solar deals? Book a personalized demo — our team will show you a Bulgarian project proposal workflow from design to delivery.
Further Reading
Best Solar Software for EPCs — Tools ranked for EPC workflows. Best All-in-One Solar Design Software — Complete platform comparison. OpenSolar Review — Residential proposal deep-dive.
Which Software Is Right for Your Use Case?
| Your Situation | Recommended Software | Why It Fits |
|---|---|---|
| Commercial installer (5-20 projects/month) | SurgePV, Aurora Solar | Balance between design accuracy and proposal speed; integrated workflow reduces tool-switching and manual calculations |
| Residential-focused installer | SurgePV, Aurora Solar, OpenSolar | Fast proposals with professional templates; SurgePV offers integrated workflow, Aurora offers aesthetics, OpenSolar offers affordability |
| Battery storage specialist | SurgePV, Energy Toolbase | Advanced battery sizing, self-consumption modeling, and financial analysis for storage projects |
| Small team (1-3 people) | SurgePV, OpenSolar | All-in-one platforms reduce software stack complexity and training time |
| Budget-conscious startups | OpenSolar, Solargraf | Low-cost or free entry points for teams with limited project volume |
When You May Not Need Advanced Solar Software
Not every solar project in Bulgaria requires comprehensive design and simulation platforms. Consider simpler alternatives if:
- Small residential projects with standard layouts — Basic design tools or manufacturer calculators may suffice for simple rooftop arrays under 10 kW with no shading or complexity.
- Engineering is outsourced — If your company uses external engineering services, you may only need proposal and CRM tools rather than full design platforms with electrical documentation.
- Very limited project volume — Teams handling fewer than 5-10 projects per year may find that manual workflows and spreadsheet modeling are more cost-effective than software subscriptions.
- Non-technical sales teams — Sales-focused companies without in-house engineers may only require proposal generation tools rather than technical design software.
However, most EPCs, developers, and medium-to-large installers in Bulgaria benefit from integrated platforms that reduce manual work and improve accuracy. At 20+ proposals per month, the time savings from automated workflows typically pay for software costs within the first month.
Bottom Line
For Bulgaria 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/year for 3 users. Book a demo to see it in action.
Frequently Asked Questions
What is the best solar proposal software in Bulgaria?
SurgePV is the best solar proposal software in Bulgaria for 2026. It’s the only platform that integrates solar design, electrical engineering (automated SLD generation), and professional proposal creation in one workflow. Proposals auto-populate from your technical design with customizable financial modeling for Bulgarian electricity rates and net metering. Pricing starts at $1,499/user/year with all features included.
Can proposal software calculate Bulgarian net metering ROI?
Yes. SurgePV supports customizable utility rate input, so you can model Bulgarian net metering economics with residential rates (0.16-0.18 BGN/kWh) and commercial rates (0.20-0.28 BGN/kWh). The platform calculates net metering savings with annual reconciliation for systems up to 200 kW. Most other proposal tools also support manual rate entry, but with less financial modeling depth.
Which software supports Bulgarian lev (BGN) currency?
Most solar proposal tools allow custom currency display, but none come pre-loaded with Bulgarian utility rate databases. SurgePV, OpenSolar, and Solargraf all support manual entry of Bulgarian rates in BGN. The fixed EUR/BGN exchange rate (1 EUR = 1.96 BGN) simplifies conversions. SurgePV offers the deepest customization for Bulgarian financial modeling.
How do I include the 70% government subsidy in proposals?
Currently, no solar proposal tool automates Bulgaria’s specific 70% residential subsidy. However, SurgePV’s customizable financial templates let you display pre-subsidy cost, the 70% government subsidy deduction, and post-subsidy customer cost side-by-side. Create a proposal template once, and reuse it for all residential subsidy-eligible projects. The result: clear, professional proposals showing 3-5 year payback vs 8-10 years without the subsidy.
What is the average solar payback period in Bulgaria?
For residential systems with the 70% government subsidy: 3-5 years. Without subsidy: 8-10 years. For commercial rooftop (net metering, 100-200 kW): 6-8 years with 12-15% IRR. For utility-scale (PPA-based): depends on auction price, typically EUR 55-65/MWh with 8-12% IRR. SurgePV’s financial tools model all these scenarios. Use our ROI calculator for quick estimates.
Can proposal software integrate with solar design tools?
SurgePV is the only platform where proposals integrate directly with the technical design. Proposals auto-populate with system layout, production estimates, equipment specs, and financial analysis from your design — no duplicate data entry. OpenSolar offers basic design + proposal integration. Energy Toolbase, Enact Solar, and Solargraf require separate design software.
How much does solar proposal software cost in Bulgaria?
Pricing ranges from free (Solargraf basic tier) to $6,000+/year (Energy Toolbase premium). SurgePV offers the best value at $1,499/user/year, including design + engineering + proposals with no feature gating. OpenSolar runs $99-$299/month ($1,188-$3,588/year). Enact Solar costs $2,000-$4,000+/year. See our pricing page for current SurgePV plans.
Which proposal software is best for residential vs. commercial in Bulgaria?
Residential: SurgePV or OpenSolar. SurgePV offers deeper financial modeling and design integration. OpenSolar offers faster, simpler proposals for the residential-only segment. Commercial (up to 200 kW): SurgePV — the integrated design + proposals + SLD workflow is essential for commercial credibility. Utility-scale (PPA): SurgePV or Energy Toolbase for advanced PPA financial modeling.
Note
Pricing information is based on publicly available data as of February 2026. Contact vendors directly for current pricing and Bulgaria-specific quotes. Some vendors offer regional pricing adjustments.
Sources
- SurgePV Product Documentation — Official feature specifications and technical capabilities (accessed February 2026)
- Bulgarian Energy and Water Regulatory Commission (EWRC) — Regulated electricity prices 2025 (accessed February 2026)
- Bulgarian Ministry of Energy — Residential solar subsidy program 2025 (accessed February 2026)
- SolarPower Europe — Bulgaria Market Outlook 2025 (accessed February 2026)
- PV Magazine — Bulgaria solar market coverage and subsidy program reporting (accessed February 2026)
- OpenSolar, Energy Toolbase, Enact Solar, Solargraf — Official documentation and pricing pages (accessed February 2026)
- G2 and Capterra — User reviews for all platforms (accessed February 2026)