Private planning. Practical numbers.

Turn your energy use into a solar blueprint.

Size panels and batteries, model monthly output, and compare cost, payback and ROI for grid-tied, hybrid or off-grid systems—all in one private plan.

Get it on Google Play

The App Store listing is not available yet.

Powerful solar planning starts free. Pro unlocks the complete toolkit.

No account
No ads
Plans stay on your device

Core plan output

Grid-tied

Phoenix Home

System size: 6.30 kW
Annual production: 11.0 MWh
Estimated cost: $20,160

A real calculation from the current Android app

One set of inputs. The numbers you need to compare a solar plan.

Right-size the system

Panels, inverter and battery capacity.
Understand production

Monthly, annual and winter-aware output.
Compare cost

Upfront cost, local assumptions and first-year savings.
Understand the return

Payback, 25-year ROI and LCOE.

From energy use to a complete solar scenario.

Energy use

Enter your monthly electricity use.
System model

Model panels, batteries and site conditions.
Decision-ready results

See production, cost, ROI and payback.

Start free. Build with Pro.

A powerful start for free. A complete workflow with Pro.

Start free with everything needed to size panels and batteries, model production and costs, and estimate payback. Pro turns each calculation into a complete professional workflow—with Scientific mode, deeper engineering control, polished PDF reports, CSV export and a library for up to 200 saved calculations.

Powerful free toolkit

Simple and Advanced modes for grid-tied, hybrid and off-grid systems
Panel, inverter and battery sizing, including chemistry and autonomy
Monthly, annual and winter-aware production
Cost, first-year savings, payback, 25-year ROI and LCOE
Roof, shading, equipment and local-cost assumptions
Knowledge base plus one locally saved calculation

Complete Pro workflow

Scientific mode with manual peak-sun-hours and engineering overrides
Professional PDF reports ready to share
Brand PDF reports with your name or company
CSV export for deeper analysis
A library for up to 200 saved calculations

No account. No ads. Your calculations and saved projects stay on your device.

Unlock Pro with monthly, annual or lifetime access.

A look inside the app

Authentic screens from the current Android release.

System size and panel count
Annual sizing for an off-grid cabin
Cost, ROI and payback
Winter sizing for an off-grid cabin
Monthly production
Solar terms, from simple to scientific
Scientific controls Pro
PDF and CSV export Pro

Who it’s for

Home solar

Understand system scale, production and economics before you request quotes.

Off-grid and backup

Compare battery chemistry, usable capacity, autonomy and winter worst-month sizing.

Installers and consultants

Turn site-specific assumptions into repeatable professional work with Scientific controls, PDF and CSV output, and up to 200 saved calculations in Pro.

Your projects stay yours.

Open PVNomics and start planning immediately. Your calculations and saved projects stay on your device, so you stay in control while you explore and compare solar options.

No account required
No ads
Works offline

See our privacy approach

Know what’s behind every number.

PVNomics combines historical solar-resource data with clear equipment assumptions and real-world loss factors. Key inputs are visible and adjustable, so you can understand what drives each result and compare scenarios with confidence.

Historical solar data
Adjustable inputs
Visible loss factors

Frequently asked questions

What can I do for free?

The free version gives you a strong first plan: Simple and Advanced modes; grid-tied, hybrid and off-grid systems; panel, inverter and battery sizing; monthly, annual and winter-aware production; cost, first-year savings, ROI, payback and LCOE; plus the built-in knowledge base. You can save one calculation locally and see PVNomics at work before moving to Pro.

Do I need an account?

No. There is no sign-up and no account. Install the app and start calculating.

Does PVNomics show ads?

No. PVNomics is ad-free. Pro purchases support continued development and unlock the complete professional toolkit.

Why go Pro?

Pro turns PVNomics into a complete professional workflow. Unlock Scientific mode with manual peak-sun-hour and engineering overrides, create share-ready PDF reports branded with your name or company, export CSV data, and build a library of up to 200 saved calculations. It is designed for deeper analysis, polished deliverables and ongoing project work.

How is Pro sold?

Choose monthly, annual or lifetime Pro access. Google Play shows localized prices in your currency. Subscriptions renew unless you cancel them in your Google Play settings; lifetime is a one-time purchase and does not renew.

Can I use it offline?

Yes. Calculations run on your device. Every city in the built-in database includes offline monthly NASA POWER climatology. If you use GPS elsewhere, the app can calculate immediately with an on-device latitude-based estimate and, when you choose, refresh the historical solar data online.

How does GPS work?

GPS is used only when you ask the app to detect your site. For an optional online solar-data request, coordinates are rounded to 0.01° before they are sent, and the result is cached on your device.

How accurate are the estimates?

The app uses historical solar-resource data, equipment assumptions and documented loss factors. Results are planning estimates—not guaranteed production or quotes. Verify with a professional installer before you buy.

Where is my project data stored?

Calculator inputs and saved projects are stored on your device. Clearing the app’s data or uninstalling removes them, so note important results first.

How do I restore a Pro purchase?

Open the app settings and use Restore Purchases on a device signed in with the same Google Play account. Purchases do not transfer between Google Play and the App Store.

How do I contact support?

Email support [at] ttrlabs [dot] co

Start your solar plan. Take it further with Pro.

Calculate your first scenario in minutes, then unlock Scientific controls, professional PDF reports, CSV export and a 200-calculation library with Pro.