Astronautics Solar Meter App

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Inside the App How It Works App Features & Specs Solar Savings Explained Reviews

Reviewed by

Ludis.app Team

Published

Apr 15, 2026

Updated

Apr 15, 2026

Astronautics Solar Meter is a solar investment calculator for anyone trying to figure out whether rooftop panels are actually worth the money. You put in your country, panel count, and system specs — the app handles the rest, turning raw inputs into a clear financial and environmental picture. It sits somewhere between a serious planning tool and an unusually stylish app, wrapped in a deep-red, space-themed interface that makes running the numbers feel less like homework.

Inside the App

How It Works

Solar calculators tend to be either dry spreadsheets or vague marketing tools that tell you solar is great without ever saying how great, or for whom. Astronautics Solar Meter occupies a different position: it takes a country-specific electricity tariff, your panel count and wattage, peak sun hours, and a performance ratio, then produces a Mission Report with daily, monthly, and yearly energy output alongside actual dollar savings and a payback timeline.

What the numbers actually look like

The Profile Setup screen auto-fills local electricity costs and peak sun hours based on your selected country — though you can override any value manually. Results are displayed in a card-based Mission Report: a sample configuration of 12 panels at 400W in Germany returns 10.2 kWh/day, $1,500/year in savings, and a payback period of 4.8 years. CO₂ reduction is shown in kg per year and translated into a tree-planting equivalent, making the environmental side tangible rather than abstract. The Energy Timeline screen adds a line chart showing seasonal variation across the year.

Tools beyond the main report

Roof Planner — enter your available roof area in m² and the app maps out how many panels fit, the used area, and total system size on a visual grid
Solar Tips & Knowledge — a curated educational section covering panel orientation (south-facing panels produce up to 25% more), cleaning frequency, seasonal output differences, and efficiency ranges (15–22% for residential panels)
All results screens offer direct navigation to Recalculate, View Details, Tips & Knowledge, and Roof Planner without backtracking

A word on the visual design

The aesthetic here is genuinely unusual for a utility app. Deep red gradients, gold particle effects, scattered stars, and a fierce purple-and-gold dragon dominating the splash screen give the whole thing a fantasy-gaming atmosphere. If you've spent time with visually dramatic slot or arcade games — the kind built around mythical creatures, glowing embers, and ornate golden frames — this interface will feel strangely familiar. The dragon clutches a red rocket in its claw; the main menu has a "Start Mission" button. It's committed to the bit.

The multi-button results screen can feel crowded, and terms like kWp, PSH, and PR appear without in-line definitions — newcomers to solar may need a moment to orient themselves before the numbers start making sense.

Who it's built for

Homeowners researching whether solar installation pencils out financially
People who want country-specific estimates rather than generic global averages
Anyone who prefers charts and visual breakdowns over raw data tables

App Features & Specs

Input Parameters

Country, number of panels, panel power (W), roof size (m²), electricity cost (USD/kWh), Peak Sun Hours (PSH), Performance Ratio (PR 0.50–0.95)

Auto-fill by Country

Electricity cost and Peak Sun Hours are pre-filled automatically based on selected country; values remain editable

Energy Output Calculation

Calculates daily, monthly, and yearly energy generation in kWh (e.g., 10.2 kWh/day, 320 kWh/month, 3,720 kWh/year)

Financial Savings Estimate

Shows monthly and yearly savings in USD based on country electricity tariff (e.g., $125/month, $1,500/year)

Payback Period

Calculates simple payback time in years (e.g., 4.8 years); stated as simple payback without discounting

CO₂ Reduction Tracker

Estimates annual CO₂ savings in kg with tree-equivalent analogy (e.g., 1,300 kg/year ≈ planting trees)

Roof Planner Tool

Grid-based visual roof planner; inputs available roof area (m²), default panel size 1.7 m² and 400 W per panel; shows planned panels, used area, and total system size

Solar Tips & Knowledge Section

Educational content covering panel orientation, cleaning/maintenance, seasonal output variation, and efficiency (15–22% for residential panels, up to 200W per m²)

Input Parameters	Country, number of panels, panel power (W), roof size (m²), electricity cost (USD/kWh), Peak Sun Hours (PSH), Performance Ratio (PR 0.50–0.95)
Auto-fill by Country	Electricity cost and Peak Sun Hours are pre-filled automatically based on selected country; values remain editable
Energy Output Calculation	Calculates daily, monthly, and yearly energy generation in kWh (e.g., 10.2 kWh/day, 320 kWh/month, 3,720 kWh/year)
Financial Savings Estimate	Shows monthly and yearly savings in USD based on country electricity tariff (e.g., $125/month, $1,500/year)
Payback Period	Calculates simple payback time in years (e.g., 4.8 years); stated as simple payback without discounting
CO₂ Reduction Tracker	Estimates annual CO₂ savings in kg with tree-equivalent analogy (e.g., 1,300 kg/year ≈ planting trees)
Roof Planner Tool	Grid-based visual roof planner; inputs available roof area (m²), default panel size 1.7 m² and 400 W per panel; shows planned panels, used area, and total system size
Solar Tips & Knowledge Section	Educational content covering panel orientation, cleaning/maintenance, seasonal output variation, and efficiency (15–22% for residential panels, up to 200W per m²)

Solar Savings Explained

What information do I need to enter to get my solar calculation?

In the Profile Setup screen, you enter your country, number of panels, and panel power. Fields like electricity cost and average peak sun hours are auto-filled based on your country but can be manually adjusted. You can also set the Performance Ratio (between 0.50 and 0.95) for a more precise result.

What results does the Mission Report provide after setup?

The Mission Report displays your estimated daily, monthly, and yearly energy output in kWh, along with monthly and yearly savings in dollars. It also shows your payback period in years and your annual CO₂ reduction in kilograms.

How does the Roof Planner feature work?

The Roof Planner lets you enter your available roof area in square meters and automatically calculates how many panels can fit based on a default panel size of 1.7 m². It then summarizes the planned panel count, used area, and total system size, and lets you save the layout or try a different configuration.

How does the app show my environmental impact?

The app calculates your annual CO₂ emissions prevented and translates that figure into a tree-planting equivalent — for example, preventing 1,300 kg of CO₂ per year is shown as equivalent to planting a certain number of trees. This makes the environmental benefit more tangible and easy to understand.

Is there any educational content in the app beyond the numbers?

Yes, the Solar Tips & Knowledge section provides practical guidance such as how panel orientation affects output, how dust and snow can reduce efficiency by up to 30%, and how seasonal changes impact energy production. It also covers efficiency basics, noting that most residential panels operate at 15–22% efficiency.

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