What you will learn
- Customer application flow with affordability and credit checks
- Product catalogue: loans, leases, and PPAs with terms and eligibility
- Payment estimation showing monthly cost against bill savings
- Installer job linking, so finance follows the installation
- Milestone verification and staged disbursement
What a solar financing platform is
Solar's upfront cost is its main sales barrier, and financing is how most residential and commercial customers cross it. But solar finance is not generic lending: the asset's production, the customer's bill savings, and the installer's completion all affect risk. A platform that treats a solar loan like a personal loan misses the production data, and one that ignores credit discipline approves projects that default.
The platform must keep three parties aligned: the customer who needs clear monthly terms, the installer who needs prompt payment on completion, and the lender who needs verified installation and production data. Milestone-based disbursement — payment released as installation stages are verified — is what makes that alignment work.
Who uses it
Installers, sales teams, lenders, brokers, and customers use it. Lenders assess applications and portfolios, installers track financed jobs, and customers see terms and payment schedules.
Core features
The features below are the ones buyers check first when evaluating a solar financing platform.
- Customer application flow with affordability and credit checks
- Product catalogue: loans, leases, and PPAs with terms and eligibility
- Payment estimation showing monthly cost against bill savings
- Installer job linking, so finance follows the installation
- Milestone verification and staged disbursement
- Document management for contracts, disclosures, and signatures
- Portfolio views for lenders: performance, arrears, and production
- Servicing views for payments, arrears, and customer support
How it is built
Build in this order, and do not skip the validation step at the end of each phase.
- Define the products and rules. Document each finance product's terms, eligibility, disclosure requirements, and disbursement milestones, with legal and lender input.
- Build application and decisioning. Implement applications, credit checks, and decision workflows, with clear reasons for declines.
- Build payment estimation. Implement monthly payment and savings estimates with stated assumptions, tied to the quoted system.
- Add installer and milestone flows. Link finance to installation jobs, and release disbursements only on verified milestones.
- Add servicing and portfolio tools. Provide payment servicing, arrears handling, and lender portfolio views.
- Pilot with one lender and product. Run a small set of real financed jobs end to end, and reconcile every disbursement and payment.
Disbursement must follow verified milestones, never installer promises. Paying in full before installation completes is how lenders fund unfinished systems.
Technology considerations
Financial compliance and data sensitivity dominate the technical work. Credit data, contracts, and signatures need strong security and audit trails, disclosure documents must match the exact terms offered, and the platform must handle the regulatory requirements of each jurisdiction it operates in. Integration with installer job systems and payment processors adds further complexity.
- Secure handling of credit and personal data with audit trails
- Disclosure generation matching the exact offered terms
- Milestone verification workflows with evidence attached
- Payment processing with arrears and refund handling
- Role-based access separating customers, installers, and lenders
Challenges and how to handle them
Financing platforms fail on disbursement discipline and on savings overpromising. Paying installers before completion creates unfinished-system losses, while payment estimates built on optimistic production and tariff assumptions produce customers who feel misled when bills arrive.
- Full disbursement before installation is verified complete
- Savings estimates that ignore tariff changes and panel degradation
- Credit decisions without documented reasons, creating compliance risk
- Installer and finance records disconnected, so jobs and loans diverge
- Arrears handling that treats solar loans like unsecured debt
What to check before launch
Before launch, run a small set of real financed jobs end to end with one lender: application, credit decision with documented reasons, milestone verification, staged disbursement, and first payments. Every disbursement must follow verified evidence of work, not installer assurances, and the evidence standard must be clear to installers before they start. Test the unhappy paths: a declined applicant who deserves a clear explanation, an installation that stalls mid-way with funds partially released, and a customer whose savings fall short of the estimate. Confirm disclosure documents match the exact terms offered in every case, and that arrears handling distinguishes a customer in genuine difficulty from a system error. Only add lenders and products once the pilot portfolio's payments reconcile cleanly.
What a good first version looks like
A good first version covers one finance product with one lender: applications, decisions, milestone disbursement, and servicing. Additional products, lenders, and PPA structures follow once the pilot portfolio performs cleanly.
Costs and timelines vary with scope, integrations, and the number of sites or users involved. Treat any figure you see online as a rough range only, and confirm with a written quote for your specific requirements before committing budget.
Frequently asked questions
What is the difference between a solar loan, lease, and PPA?
With a loan, the customer owns the system and repays the borrowing. With a lease, the customer rents the system for fixed payments. With a PPA, the customer buys the electricity the system produces at an agreed rate, without owning it.
Who owns the system under each option?
Loans: the customer. Leases and PPAs: typically the finance provider or a third-party owner, with ownership transfer terms varying by agreement.
Why is disbursement staged?
So lenders pay as installation stages are verified — survey, installation, commissioning — rather than funding a system that may never be completed.
Are savings guaranteed?
No, honestly they are estimates based on production, tariffs, and usage assumptions. Any platform promising guaranteed savings should state exactly what is guaranteed and by whom.
Can commercial customers use the platform?
Yes, with different products and assessment: commercial finance weighs business credit, site tenure, and energy contracts, and usually involves larger, bespoke structures.