
Project Sunroof
HowMuchWatts
CHEA NEM12 CSV Microtools
CampPowerCalc
SolarPulse
OffGrid Power Planner
Toolaska Solar Energy Calculator
Free off-grid & DIY solar sizing calculator. Size your battery bank, solar array, charge controller, and inverter from your loads, then compare curated, ranked solar products with real reviews. Works offline.

Create iOS and Android apps with React and Ionic

Website, pricing, platforms and company facts side by side.
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| Website | sizemysolar.com | reactionic.github.io |
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What each product offers, as listed by its team.


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An editorial look at what each product does well and who it suits.


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Why this product is good
Recommended for
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Share your experience with using Size My Solar and React-Ionic. For example, how are they different and which one is better?
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Free, accurate calculators for home energy savings — solar payback, heat pumps, EV charging, appliance running costs and more. No signup.
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A Series of Free Online Microtools for working with Smart Meter Data in NEM12 CSV Format: Analyze, Summarize, Visualize, Create Tables and Charts, Model Solar and Battery, and Convert CSV for use in Spreadsheets and 3rd Party Solar Design Tools.
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Free solar production simulator and savings estimator powered by PVGIS
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Free off-grid power system planner for batteries, solar, inverters, cables, and protection.
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