solar-invoice
Manish SalavBuild a production-grade, full-stack Progressive Web App (PWA) for managing small business billing and professional invoicing. The architecture must be scalable, secure, and follow standard commerce accounting rules. 1. Roles & Permissions: Owner: Can manage company profiles, tax settings (GST), all clients, and all invoices. Manager: Can create and edit invoices and clients, but cannot delete records or change company tax settings. 2. Data Objects & Relationships: CompanyProfile: name, GSTIN (string), address, logo_url, bank_details. Client: name, email, phone, address, tax_id. Invoice: invoice_number (auto-increment), date, due_date, status (Draft/Unpaid/Paid), client_id, subtotal, discount, tax_amount (GST), total. LineItem: description, quantity (integer), unit_price (decimal), tax_rate, total_price. 3. Required Screens & Workflows: Dashboard: Summary cards for "Total Revenue," "Pending Payments," and a bar chart showing monthly billing trends. Invoice Generator: A multi-step form to select a Client, add LineItems (with auto-calculating totals), and set tax rates. Client Management: A searchable table of all clients with a "Quick Add" button. PDF Export: A dedicated workflow to generate a professional, print-ready PDF invoice from an Invoice ID. 4. Business Logic & Guardrails: Calculation Engine: Implement logic where ItemTotal = (Qty * Price). Subtotal = sum(ItemTotals). Tax = Subtotal * TaxRate. Validation: An invoice cannot be marked "Paid" without a recorded payment date. Invoice numbers must be unique and non-editable once finalized. 5. Technical Stack Preferences: Frontend: Next.js with Tailwind CSS (Modern Corporate Aesthetic: White bg, Deep Blue accents). Backend: Node.js with a PostgreSQL database. Deployment: Kubernetes-ready with CI/CD scaffolding.
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Architecture
Invoicing Made Simple
Professional invoicing for small businesses in India. Create GST-compliant invoices, manage clients, and track payments â all in one powerful platform.
Your Business Universe
Navigate the solar-invoice galaxy â each star is a powerful feature designed to streamline your invoicing workflow. Click to explore.
Everything You Need to Invoice Smarter
From invoice generation to GST compliance, solar-invoice gives small businesses the tools to manage billing, clients, and finances in one streamlined platform.
Real-Time Dashboard
Get a birdâs-eye view of total revenue, pending payments, and monthly billing trends with interactive summary cards and charts.
Invoice Generator
Create professional invoices with a guided multi-step formâselect clients, add line items, apply tax rates, and preview before sending.
Client Management
Organize your client base with searchable records, quick-add contacts, and full edit history to keep every relationship on track.
PDF Export
Generate print-ready, professionally formatted PDF invoices from any invoice IDâperfect for sharing, archiving, or compliance audits.
Multi-User Roles
Assign Owner, Manager, or User roles with fine-grained permissionsâcontrol who creates invoices, edits clients, or changes tax settings.
GST Support
Stay compliant with Indian tax regulations. Configure GSTIN, apply CGST/SGST/IGST rates automatically, and generate GST-ready reports.
Role-Based Access
Built for Every Team Member
Three distinct roles with tailored permissions ensure your team works efficiently while keeping sensitive settings secure.
Owner
Full control over company settings, tax configuration, and all financial records.
Learn MoreGet Started in Four Simple Steps
From sign-up to sending your first GST-compliant invoice â solar-invoice makes professional billing effortless.
Sign Up & Configure
Add Clients
Generate Invoices
Download & Send
Sign Up & Configure
Create your solar-invoice account in seconds. Set up your company profile, add your GST details, and configure tax rates tailored for Indian compliance.
Add Clients
Build your client directory with the quick-add form. Store billing addresses, GSTIN numbers, and payment terms â all searchable and organized.
Generate Invoices
Use the multi-step invoice generator to select a client, add line items, apply tax rates, and preview your professional invoice before finalizing.
Download & Send
Export print-ready PDF invoices with one click. Share directly with clients via email or download for your records â GST-compliant and audit-ready.
Trusted by Small Businesses Across India
See how solar-invoice helps owners, managers, and freelancers streamline their billing and get paid faster.
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