Top Solar Proposal Software for 2025 in Germany

Germany’s PV sector continues to scale rapidly, but modern installers face more than just layout challenges—they’re under pressure to deliver fast, accurate, and fully compliant proposals. EEG feed-in tariffs must be calculated across 20-year projections. KfW loans demand amortization reports and ROI visuals. Clients expect dual-language contracts, CAD-quality diagrams, and clear financial forecasts—all delivered within tight timelines.

Yet most EPCs still rely on a patchwork of tools: CAD software for layout, PV*SOL or PVsyst for simulation, Excel for tariffs, and Word for contracts. This fragmented approach slows down sales and increases the risk of compliance errors.

This guide ranks the top solar proposal software platforms used in Germany in 2025—evaluating their performance on shading accuracy, bankable forecasting, German-language outputs, and workflow automation. At the top: SurgePV, the only tool that combines precision simulation with EEG-compliant finance logic and real-time contract delivery.

Germany-Specific Proposal Requirements

The German solar market isn’t just growing—it’s heavily regulated, financially scrutinized, and client-expectation driven. To compete effectively, installers and EPCs must use proposal software that goes far beyond quoting kilowatts and price tags.

EEG compliance requires precise forecasting of export yields and compensation under the 20-year feed-in tariff scheme. This means software must support 8760-hour simulations and generate P50/P90/P99 projections, accompanied by export income tables that meet auditor standards.

KfW loan integration is another critical requirement. Installers must deliver financial modeling that includes loan interest rates, repayment schedules, payback period, and IRR, often tied to battery systems and hybrid installations.

Proposals should include sun-path visualizations optimized for German latitudes, and per-module shading maps that detail energy loss from nearby dormers, trees, and chimneys—especially in dense urban areas like Berlin or Stuttgart.

Dual-language (DE/EN) support is increasingly expected, not just for end clients but also for investor reviews and international project partners. Full CAD-quality visual assets—single-line diagrams, BOMs, and system layouts—must be exportable in PDF or web formats.

Finally, sales workflows must be GDPR-compliant, with eSignature options, secure customer links, and bank-grade deposit collection mechanisms to speed up deal closure while meeting strict data handling requirements.

Best Solar Proposal Software Germany 2025

1. SurgePV – Best All-In-One Tool for German Solar Proposals

SurgePV is a comprehensive cloud-based solar design and proposal software engineered specifically for compliance with Germany’s EEG feed-in tariff structure, KfW financing programs, and bilingual regulatory documentation. It integrates every phase of the solar sales and engineering process—from AI-powered roof modeling and 8760-hour simulations to P50/P90 forecasts and DE/EN contract-ready proposals.

SurgePV is especially favored by mid-to-large EPCs and energy consultants due to its all-in-one nature: it eliminates the need for external Excel sheets, CAD programs, or separate signature/payment portals. With real-time ROI, IRR, and amortization visuals, it helps installers win trust with banks, homeowners, and commercial buyers alike.

Key Features:

• Built-in EEG tariff modeling (20-year feed-in calculation)
  
• KfW loan amortization forecasting with IRR & payback logic
  
• Dual-language (German/English) proposal and contract output
  
• LIDAR + AI for urban roof modeling (dormers, trees, tilts)
  
• Dynamic ROI + LCOE breakdowns per quote
  
• CRM integration, eSignature, and QR-payment built-in

Pros:

• Full 8760-hour yield simulation engine with P50/P90/P99 outputs
  
• Built-in EEG tariff calculator for 20-year feed-in projections
  
• Native support for KfW loan modeling (amortization, IRR, LCOE)
  
• DE/EN bilingual proposal exports and client-ready PDFs
  
• Per-module shading via LIDAR and AI; ideal for urban Germany
  
• End-to-end workflow from design to eSign and CRM sync
  
• Hardware-neutral: supports SMA, Fronius, KACO, SolarEdge, etc.
  

Cons:

• Requires a learning curve for full feature usage
  
• Cloud-based only; not available as a local install
  
• May be overkill for very small teams doing only basic sales quoting
  

Best For: German EPCs, sales teams, and energy consultants needing fast, investor-compliant, and customer-friendly proposals with no Excel dependencies.

2. Aurora Solar – Visual Proposal Workflows with Emerging German Market Support

Aurora Solar is an internationally recognized PV design and proposal software known for its advanced 3D design tools, LIDAR integration, and intuitive customer-facing proposals. Originally developed in the U.S., Aurora is now growing its presence in Europe and Germany, offering high-quality visuals and reliable performance modeling.

Although Aurora excels in pre-sales design and shading visualization, its lack of native EEG tariff engines and limited German-language support require users to handle financial projections, rebates, and localized proposal compliance manually or via integrations. It’s well-suited for design-driven teams prioritizing visual storytelling and customization.

Key Features:

• 3D interactive layout tool with auto-roof detection
  
• Shading analysis with sun-path and LIDAR layers
  
• Customer-facing design previews and reports
  
• Basic battery modeling for hybrid quotes

Pros:

• Highly intuitive 3D design and proposal generation
  
• Excellent LIDAR shading and sun-path visualizations
  
• Compatible with a wide range of EU inverters
  
• Proposal templates are sleek and presentation-ready
  
• Scalable for large sales teams and remote workflows
  

Cons:

• No native EEG or KfW finance logic—requires manual entry
  
• Lacks DE-language outputs by default
  
• Not purpose-built for German compliance or permitting
  
• P90 bankable modeling not available
  

Best For: Solar designers and sales teams prioritizing visuals and layout accuracy over localized financial logic.

3. Solargraf – Fast EU Proposals with LIDAR, But Limited German Compliance

Solargraf is a lightweight, web-based platform optimized for speed, convenience, and basic LIDAR-powered layouts. Originally launched in North America, it has expanded into EU markets, including limited support in Germany.

The platform is built for fast residential quoting and simple proposal generation, featuring a drag-and-drop interface, shareable quote portals, and built-in CRM sync. However, Solargraf does not support EEG tariff structures or KfW financing models, making it better for speed-focused residential sales rather than full financial compliance.

Key Features:

• LIDAR-based quick layouts
  
• Web-based proposals with eSign and CRM hooks
  
• Clean UX for reps in the field

Pros:

• Fast and user-friendly interface for quoting
  
• LIDAR-based layouts and clean visual exports
  
• CRM and basic eSignature tools built-in
  
• Well-suited for residential sales teams in EU regions
  

Cons:

• No German feed-in tariff modeling (EEG) or loan logic
  
• No Polish or German proposal templates—only UI-level localization
  
• Basic financial visuals—no IRR, LCOE, or ROI calculators
  
• Proposal PDFs lack customization depth for regulation
  

Best For: Installers focused on speed and residential quoting—not on policy modeling or export-grade proposals.

4. Pylon – Ultra-Fast Proposal Generator for Residential Sales

Pylon is a rapidly growing EU-based solar platform tailored for installers and small EPCs needing speed over complexity. It offers one of the fastest quoting workflows available—able to create a client-ready solar proposal in minutes.

Its strength lies in usability: sales teams can use high-res maps and LIDAR to instantly position panels and generate financial summaries. That said, Pylon lacks German-specific financial tools such as EEG modeling, amortization calculators, or dual-language exports. It is best used for high-volume, residential projects where regulatory reporting is handled separately.

Key Features:

• Proposals in 2–3 minutes
  
• LIDAR roof detection with fast UI
  
• Customer portal with shareable quote links

Pros:

• Extremely fast proposal generation—under 5 minutes
  
• Polish and partial German UI support
  
• LIDAR-assisted layouts and panel placement
  
• Clean dashboard and CRM-lite functionality
  

Cons:

• No EEG, KfW, or amortization support
  
• No P50/P90 simulation or investor-ready financial logic
  
• Not suitable for commercial or bank-backed projects
  
• No DE-language export or signature workflow built-in
  
  

Best For: Sales-first EPCs handling high proposal volumes where speed outweighs technical simulation depth.

5. PV*SOL – Germany-Built Simulation Tool with Rich Tariff Modeling

PV*SOL is a desktop-based solar simulation software developed by Valentin Software in Berlin. It’s long been a go-to tool for engineers, offering deep technical customization, irradiance modeling, and energy loss analysis. It supports EEG tariff modeling through manual configuration and provides reliable P50/P90 outputs.

Despite its technical power, PV*SOL is not a proposal-focused tool. It lacks client-facing formatting, automation, and CRM integrations. It’s best used by technical staff who pair it with other tools for final presentation and contract delivery.

Key Features:

• Custom tariff modeling for EEG and FiT exports
  
• Advanced shading and system loss modeling
  
• Compatible with SMA, Fronius, and KACO

Pros:

• Deep technical simulation accuracy
  
• Native EEG tariff input support
  
• Robust stringing, inverter planning, and loss diagrams
  
• German-language interface and datasets included
  
• Widely trusted for feasibility and engineering validation
  

Cons:

• Steep learning curve, engineering-oriented UI
  
• No proposal templates or built-in signature tools
  
• Manual process to generate final client-facing documents
  
• Desktop-only, no cloud access or mobile interface
  

Best For: Engineering teams needing simulation fidelity who are comfortable exporting into proposal stacks.

6. OpenSolar – Free, Functional, but Not Germany-Ready

OpenSolar is a zero-cost design and proposal platform designed to make solar software accessible to all. It includes basic layout tools, customizable templates, and a lightweight CRM system. Its ease of access and no-fee model have made it popular among new installers and small teams.

However, OpenSolar currently lacks built-in tariff logic for EEG compliance, KfW financial calculators, or robust support for German-language documentation. While excellent for early-stage quoting or learning, most professional EPCs in Germany will find its outputs insufficient for regulatory or investor requirements.

Key Features:

• Free quoting and layout tools
  
• CRM pipeline management
  
• Custom proposal templates

Pros:

• Completely free with access to design and proposal tools
  
• Basic CRM and quote tracking included
  
• White-label proposals for branding flexibility
  
• Easy to use and set up for small teams
  

Cons:

• No support for German tariff modeling or KfW finance
  
• No LIDAR or advanced shading simulation
  
• No DE-language proposals or EEG modeling
  
• Too limited for mid-to-large EPC compliance needs
  

Best For: New solar businesses testing tools or working on low-regulation residential installs.

7. SolarEdge Designer – Best for SE Hardware, Limited Proposal Flexibility

SolarEdge Designer is a proprietary web platform tailored specifically for installers using SolarEdge inverters and power optimizers. It allows system integrators to quickly validate voltage windows, sizing, and optimizer pairing—producing layouts and performance estimates tied directly to the SE ecosystem.

While precise within its niche, the tool is limited when it comes to broader proposal needs: it lacks EEG or KfW modeling, German-language exports, and hardware-neutral design flexibility. Ideal for SE-only contractors, but not for mixed-hardware EPCs or full-service sales teams.

Key Features:

• Real-time inverter/string layout per SE specs
  
• Quick BOM and layout generation
  
• Output performance estimates tied to hardware

Pros:

• Auto-layout, optimizer pairing, and voltage checking for SE systems
  
• Integrated BOM and layout export for SE hardware
  
• Fast and accurate for component-matched performance estimates
  

Cons:

• Only works with SolarEdge hardware
  
• No EEG or financial modeling
  
• Basic proposal visuals, no customization or signature options
  
• Not suitable for multi-brand or hybrid EPCs
  

Best For: Installers committed to SolarEdge hardware, needing layout support but not financial forecasting.

SurgePV Deep Dive: Built for German Proposal Compliance

SurgePV is uniquely tailored to meet the stringent and highly structured requirements of Germany’s solar market. Unlike generic design tools, it doesn’t just model panels—it delivers full financial, technical, and contractual readiness in one streamlined interface.

EEG Tariff Engine:

SurgePV comes with a fully integrated calculator for Germany’s Erneuerbare-Energien-Gesetz (EEG), automatically projecting year-by-year revenue based on both current and legacy feed-in tariffs. Outputs reflect 20-year FiT estimates, critical for project bankability.

KfW Financing Module:

Built-in support for KfW programs including 124 (homeownership), 270 (renewable power), and CP-eligible extensions. Users can produce amortization charts, IRR estimates, and cash flow visuals instantly—ready for banks and clients.

Multilingual Proposal Export:

All documentation—offers, invoices, reports—can be generated in German, English, or bilingual formats. This is critical for cross-border proposals or institutional financing workflows.

Sun-Path & Shading Engine:

SurgePV includes dynamic sun-path overlays and per-module shading diagrams aligned with real-world latitude and azimuth configurations typical in Stuttgart, Berlin, and Bavaria’s sloped housing stock.

CAD-Level Layout & Electrical Plans:

Automatically generate layout plans, single-line diagrams (SLDs), and full bill of materials (BOM) from the design interface—no need to re-export or redraw in CAD tools.

eSignature & Payment Integration:

SurgePV includes mobile-friendly eSign workflows and SEPA/iDEAL payment links for fast contract execution—cutting delays and improving conversion rates.

Hardware-Neutral Compatibility:

Supports SMA, Fronius, SolarEdge, KACO, and more—ensuring flexibility regardless of your preferred hardware lineup.

Efficiency Gains:

Most German EPC users report reducing proposal cycles from 2–3 days (using PV*SOL + Excel + Word) to under 2 hours, with no manual calculations or format juggling required.

Visual Aids & Local Case Examples

• Proposal Snapshot: Dual-language (DE/EN) SurgePV PDF proposal with a full EEG income table, KfW-financed scenario, and embedded ROI/payback visuals.
  
• Sun-Path Simulation: LIDAR-based shadow rendering over a Berlin townhouse roof—showing loss at module level due to dormers and trees.
  
• Installer Case Study: A mid-sized EPC in Leipzig reduced proposal creation time by 65%, cut back on Excel usage completely, and improved customer approval rates by over 20% after adopting SurgePV.
  

“Only SurgePV combines actual EEG logic, KfW loan automation, shading visuals, and customer-ready contract flows in a single export-ready German solar software stack.”

Bottom Line

"Most solar proposal tools aren’t built for Germany—they’re retrofitted. SurgePV was engineered specifically for German installers, EPCs, and developers who need airtight compliance, detailed tariff accuracy, and polished customer experiences. From EEG income modeling to KfW amortization tables, bilingual proposals to eSignature flows—SurgePV delivers speed, clarity, and confidence in one all-in-one platform."

Book a Germany-Focused Demo of SurgePV‍

See how SurgePV transforms the German solar proposal process—from CAD layout to contract-ready quote—in a single platform. In your demo, we’ll show how to:

• Model 20-year EEG feed-in revenue
  
• Auto-generate KfW loan schedules
  
• Visualize sun-path and shading per module
  
• Export dual-language proposals and eSign-ready PDFs

Bring your own project and leave with a sample quote that’s investor-grade and fully EEG/KfW compliant.