About this app
Solar Battery Sizer helps solar energy professionals design battery banks for off-grid and hybrid PV systems per NEC Article 706. # Features - Daily energy consumption (kWh) and days of autonomy - Multiple battery chemistries: LFP, lead-acid AGM, lead-acid flooded, NMC - System voltage selection: 12V, 24V, 48V - Depth of discharge (DoD) per chemistry defaults - Round-trip efficiency factor - Temperature derating factor - Required capacity in kWh and Ah - Number of batteries and total system cost estimation - Usable energy after DoD and efficiency losses # Standards - NEC Article 706 (Energy Storage Systems) - Industry-standard chemistry defaults # For Solar installers, off-grid system designers, electrical contractors, EPC engineers, students preparing for NABCEP exam. # Optional Pro Upgrade - $2.99 one-time in-app purchase Pro unlocks history of saved calculations, dark mode, PDF export, and removes ads. One-time purchase. OPTIONAL PRO UPGRADE - $2.99 ONE-TIME IN-APP PURCHASE The following features require a separate one-time in-app purchase. They are not required to use the calculator: - Unlimited saved calculation history - PDF export of results - Dark theme - Ad-free experience
Latest release
What’s New
- Four battery chemistries to choose from: LFP, NMC, AGM, and flooded lead-acid, each with its own depth-of-discharge, round-trip efficiency, cycle-life, and cost defaults. - Clearer chemistry names so the right defaults are easy to pick. - Minor stability improvements.
Audience growth
Ratings growth
Baseline captured. Growth appears after the crawler observes a changed rating count.
Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.
Price tracking
Price intelligence
First snapshot captured. The trend line starts after the next crawler price observation.
- First observed Oct 16, 2026 · 4:59 PM $0.99
Screenshots
