Quickly and easily calculate the financial viability of your solar asset

With our Solar Calculator, you can assess the profitability of solar projects reliably, transparently and intuitively – whether you are a private investor, project developer or intermediary.

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What is the Solar Calculator?

The Solar Calculator is a web-based software solution for the financial modelling of PV systems. It has been specifically developed for solar projects of all sizes, from small rooftop systems to large-scale solar plants – with a clear focus on user-friendliness, reliability and transparency.

Unlike technical planning tools or complex Excel spreadsheets, the Solar Calculator provides a comprehensive financial analysis: revenues, costs, financing, tax effects, cash flows, and return metrics across the entire lifetime of the asset.

Key features at a glance

  • Simple input of project data

    System size, specific yield, investment costs, financing, and taxes – all individually configurable.

  • Comprehensive financial modelling

    30+ years of revenue and cost forecasts, cash flow calculations, IRR, ROI, and payback period.

  • Scenario and sensitivity analysis

    Compare different market prices, support schemes, or financing models.

  • Templates for standard system types and benchmarks

    Templates and benchmarks for different system types and parameters – Rooftop Residential, Commercial & Industrial (C&I), and Utility-Scale.

  • Report generation for banks and investors

    Export standardised PDF reports with all key metrics.

Who is the Solar Calculator for?

Private investors –
to assess projects and return potential

Project developers –
for pricing and the preparation of sales documentation

Brokers and advisers –
for use in client consultations

Financial institutions –
to evaluate business cases for financing

Installers and municipal utilities –
for rapid financial viability analysis

Solar Calculator is available in 3 versions

Free Standard Pro

Save and manage projects
3
Unlimited
Unlimited

Full financial viability calculation
(revenues, costs, financing, etc.)

Comprehensive financial metrics
(ROI, IRR, payback period, etc.)

Professional presentation view for
client meetings (charts, etc.)

Export as PDF report
(bank-ready, for investors)

CSV & Excel export
for individual analyses

Scenario analysis
(e.g. electricity price, inflation, financing)

Portfolio management
(organising projects across different portfolios)

Time resolution of calculations
(e.g. cash flows)
Annual
Annual

Annual and
monthly

Templates for system types
(C&I, ground-mounted, rooftop systems)
Sample template
Extensive library
Extensive library

Support
–
Standard
Premium

Access to training sessions and webinars

Team access / multi-user support
–
–
On request

Custom branding options (white label)
–
–
On request

Interested?

Try the Solar Calculator Free now or learn more about the Standard and Professional versions.

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