Solar + Battery + Inverter Sizer — Free Online Tool
Complete off-grid system in one shot
Size full solar system: panels (kWp), battery (kWh), inverter (kW). Climate zone + roof orientation aware.
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Solar + battery + inverter sizer
How to use this tool
- 1
Enter daily kWh + climate
- 2
See system size
- 3
Compare costs
Frequently Asked Questions
Off-grid sizing rule?
Daily kWh × 1.3 (efficiency loss) ÷ peak sun hours = panel kWp. Battery: 2 days autonomy × daily kWh / depth-of-discharge.
Peak sun hours?
Phoenix ~6.5h, Berlin ~3.0h, London ~2.7h, equator ~5.5h. Cloudy regions need bigger arrays.
Key Takeaways
- Solar + Battery + Inverter Sizer is a free, browser-based calculator tool — complete off-grid system in one shot.
- No signup, no downloads, no file uploads — your data stays on your device.
- Works on desktop, tablet, and mobile. Install as a PWA for offline access.
How to Use Solar + Battery + Inverter Sizer
- Open the tool: Launch Solar + Battery + Inverter Sizer on Toololis — no account or download needed.
- Enter your data: Paste text, enter values, or select a file directly in your browser.
- Get instant results: Everything is processed locally — results appear immediately.
- Copy or download: Save your output or share it. Bookmark for quick access next time.
Solar + Battery + Inverter Sizer — Quick Facts
- Price
- Free — no limits, no watermarks, no paywalls
- Privacy
- 100% browser-based — no data is sent to any server
- Platform
- Any modern browser on desktop, tablet, or mobile
- Category
- Calculator Tools on Toololis
- Offline
- Works offline after first visit (Progressive Web App)
| Feature | Details |
|---|---|
| Tool | Solar + Battery + Inverter Sizer |
| Category | Calculator |
| Signup Required | No |
| File Upload | None — processed in browser |
| Mobile Support | Fully responsive |
| Cost | Free forever |
Why Use Solar + Battery + Inverter Sizer?
You should try Solar + Battery + Inverter Sizer for a quick, private way to complete off-grid system in one shot. All processing happens in your browser. Your files and data never leave your device. According to web.dev, client-side processing is the gold standard for privacy.
On the other hand, dedicated APIs or desktop tools suit batch processing better. They also handle server-side automation. For everyday tasks, browser tools offer the best speed, privacy, and convenience.
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100% Privacy. This tool runs entirely in your browser. Your data is never uploaded to any server.