SolarWise Pro Solar Calculator

Know Your Sun. Own Your Savings.

SolarWise Pro shows how much electricity solar panels would produce at your address, how big the system should be, and exactly when it pays for itself — in about a minute, fully offline. Built for homeowners, installers, off-grid builders and energy professionals.

WHY SOLARWISE PRO?

✔ REAL SOLAR DATA, 100% OFFLINE — 20 years of NASA POWER satellite data (2001–2020) for 270+ cities worldwide is built into the app and blended by distance to your location. No internet, no sign-up.
✔ ACCURATE MODELLING — Sunlight on tilted panels, climate temperature correction and panel ageing are all included, and every result shows which data it is based on.
✔ ONE-TIME PURCHASE — Unlock Pro forever. No subscriptions. Ever.
✔ PROJECTS THAT REMEMBER — Each site keeps its location, status and results; your home screen adds up the whole portfolio.
✔ MODERN DESIGN — Material Design 3 with dark, light or system theme, and an animated sunrise launch.

FREE FEATURES

☀️ Solar Yield Estimator — Enter coordinates or tap "Use my location". Get yearly and monthly production, best and worst month, peak sun hours, capacity factor and a 12-month chart.

⚡ System Sizing — Enter your daily usage. Get system size (kWp), panel count, inverter size and yearly coverage for on-grid, hybrid or off-grid systems (off-grid is sized for the darkest month).

💰 ROI & Payback — Enter system cost, incentives and tariff. Get payback years, first-year savings, 25-year net savings and CO₂ avoided, including price rises, upkeep and panel ageing.

📐 Tilt Optimizer — The best year-round panel angle plus summer and winter angles, with the gain over flat panels.

🌱 Carbon Offset — CO₂ avoided using your country's electricity grid, with tree and car equivalents.

🔌 Inverter & Charge Controller Sizing — Continuous and surge ratings, and controller current from panel Isc.

🗂 Projects — Up to 3 projects with location, status, notes and saved results. Guided next steps take you from location to production to payback.

📱 Home-screen widget — Average daily output of your latest estimate.

PRO FEATURES — ONE-TIME UNLOCK

🚀 No ads
🚀 Unlimited projects
🚀 Advanced finance — NPV, IRR, cost per kWh (LCOE), cumulative cash-flow chart and 25-year cash-flow table
🚀 Branded PDF reports — share with family, clients or your installer
🚀 Battery Sizing — bank size, series/parallel layout, charge controller and cycle life for LiFePO4, AGM and Gel
🚀 Cable Sizing — cable size from voltage drop and safe current capacity, with breaker size
🚀 Shading Loss — how much a daily shadow costs you (midday shade matters most)
🚀 Grid vs Solar vs Solar + Battery — 25-year cost comparison side by side
🚀 Component Catalog — 60+ popular panels, inverters and batteries with key specs
🚀 Bill Journal — log monthly bills and solar output and track real savings
🚀 CSV export of projects and bills

PRIVATE BY DESIGN

Your projects stay on your phone. "Use my location" asks only for approximate location (about 2 km is plenty for solar data), and it never leaves your device.

WHO IS IT FOR?

• Homeowners evaluating a solar investment
• Solar installers & consultants preparing quick quotes
• Off-grid, RV, cabin & DIY solar builders
• Property managers & energy auditors
• Engineers & renewable energy students
• Small businesses going solar

Available in English, Español, Français, Português, हिन्दी and العربية.

Estimates are for planning only — always confirm a final design with a qualified installer.

Website: www.nexovia.cloud | Email: support@nexovia.cloud
SolarWise Pro is developed and maintained by Nexovia LLC.

Recent changes:
Minor bug fix