Know Your Sun.
Own Your Savings.
The complete Android solar toolkit. Offline NASA solar data, system sizing, ROI analysis, battery sizing, cable sizing, and financial modeling — all in one app. Free to start. $5.99 to unlock everything.
Why Engineers Choose SolarWise Pro
Every tool you need for professional solar design — from irradiance data to financial modeling.
NASA Solar Data, Built In
No Internet Required
Tap "Use my location" or enter coordinates and get 12 months of production from 20 years of NASA POWER satellite data — bundled in the app, fully offline.
NPV · IRR · LCOE
25-Year Cash Flow
Professional ROI modeling with Net Present Value, Internal Rate of Return, Levelized Cost of Energy, and a full 25-year cash flow table.
Full System Design
From Daily Usage to Cable Size — One App
Enter your daily usage and get system size, panel count, inverter, battery bank, cable size and charge controller — for on-grid, hybrid or off-grid.
One Payment. Everything. Forever.
No Subscription
$5.99 one-time unlocks advanced finance, battery, cable, shading and comparison tools, the component catalog, unlimited projects, PDF/CSV export, and removes all ads — forever.
13+ Professional Solar Tools
From irradiance data to financial modeling — everything a solar professional needs.
- Solar Yield EstimatorNASA data, 12-month production
- System Sizing CalculatorOn-grid, hybrid & off-grid
- ROI & Payback CalculatorPayback, savings & CO₂ avoided
- Tilt & Orientation OptimizerYear-round, summer & winter angles
- Projects ManagerUp to 3 solar projects
- DashboardPortfolio totals & next steps
- Carbon Offset Calculator50+ countries, IEA/Ember grid factors
- Inverter SizingContinuous & surge ratings
- Charge Controller SizingFrom panel Isc
- Advanced ROI ModelingNPV · IRR · LCOE
- Battery Sizing CalculatorLiFePO4 · AGM · Gel, series/parallel
- Cable Sizing CalculatorVoltage drop, ampacity & breaker
- Grid vs Solar vs Solar + Battery25-year cost comparison
- Component Catalog60+ panels, inverters, batteries
- Shading AnalysisDaily shadow loss estimate
- Bill Savings JournalTrack monthly electricity savings
- Unlimited ProjectsNo cap on solar project sites
- PDF Reports & CSV ExportBranded reports to share
Your Location's Solar Potential —
Instantly. Offline. Worldwide.
Accurate solar irradiance data is the foundation of every solar design. SolarWise Pro ships with 20 years of NASA POWER satellite climatology and models sunlight on tilted panels, climate temperature and panel ageing for any coordinates on Earth — month by month — so your sizing and ROI results are grounded in real-world data, not guesses.
- Tap "Use my location" once and get 12 months of production and peak sun hours for your site
- 20 years of NASA POWER satellite data (2001–2020) for 270+ cities, blended by distance to you
- Built into the app: works fully offline, worldwide, with no sign-up and no location upload
- Enter any latitude and longitude manually to quote systems at client sites before visiting
See It In Action
Real screens from the SolarWise Pro app — every feature at your fingertips.
Dashboard — Projects, Solar Index & Quick Tools
Simple Pricing. Professional Tools.
No subscriptions. Pay once. Use forever.
SolarWise
Forever free. No card required.
- Solar Yield Estimator (NASA data, offline)
- System Sizing Calculator
- ROI & Payback Calculator
- Tilt & Orientation Optimizer
- Up to 3 solar projects
- Carbon Offset Calculator
- Inverter & Charge Controller Sizing
- Advanced ROI (NPV · IRR · LCOE)
- Battery Sizing Calculator
- Cable Sizing Calculator
- Grid vs Solar vs Solar + Battery Comparison
- Component Catalog (60+ items)
- Shading Analysis
- Bill Savings Journal
- Unlimited Projects
- Branded PDF Reports & CSV Export
Free tier shows ads. Ads removed with Pro.
SolarWise Pro
One-time payment. Lifetime access.
One-time purchase. No subscription. Forever.
- Everything in Free
- Advanced ROI: NPV · IRR · LCOE
- 25-year cash flow table & chart
- Battery Sizing (LiFePO4 · AGM · Gel)
- Cable Sizing (voltage drop, ampacity, breaker)
- Grid vs Solar vs Solar + Battery Comparison
- Component Catalog (60+ panels, inverters, batteries)
- Shading Loss Analysis
- Bill Savings Journal
- Unlimited solar projects
- Branded PDF reports
- CSV data export
- No ads
Purchases managed securely by Google Play. Restore anytime on any device you own. Price shown in USD; local pricing applies on Google Play.
Frequently Asked Questions
Get in Touch
Have a question about SolarWise Pro? We respond within 24 hours.