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Best apps like SunStem: Solar Calculator

10+ similar apps compared and reviewed

5.0 avg rating
10 free apps
Updated September 2026
SunStem: Solar Calculator
🔧 Utilities

SunStem is great, but it's not the only option. Explore 10+ similar apps for iPhone and iPad, each reviewed and rated by real users. Find free alternatives, premium upgrades, and hidden gems.

Top Alternatives to SunStem

Watt: Solar for Van & RV#3

Watt: Solar for Van & RV by Roman Kopaliani

Battery, panels, wire & fuse
Worth Considering
🔧 Utilities
5.0(1 ratings)
FreeIn-App Purchases
Watt: Solar for Van & RV screenshot 1
Watt: Solar for Van & RV screenshot 2
Watt: Solar for Van & RV screenshot 3
Watt: Solar for Van & RV screenshot 4

This app assists with solar system design for off-grid living and vehicle conversions. It calculates required battery banks, solar panels, controllers, inverters, and wiring sizes based on your appliances and gear. Offers cited sources and brand recommendations for components.

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