Ohmio: Solar Sizing & Log

Ohmio sizes your off-grid or backup solar system with no ad covering your numbers while you work. A worked example Say your cabin uses 3 kWh a day (a 125 W fridge running 24 hours). Ohmio turns that into a battery bank of 1,000 Ah at 12 V with flooded lead-acid — or 625 Ah with LiFePO4 — and a 900 W panel array at 4.5 peak sun hours. Every result comes with its formula and its source, never a black box. After you read your inverter 1. Open Ohmio and log the kWh your inverter or charge controller shows today. 2. The Balance updates: generated against consumed, and your logging streak goes up. Under 10 seconds, with the readout still in front of you. Included at no cost - Full sizing of one project: consumption, batteries, panels, charge controller, inverter, wire gauge and fuse — no ads on any step. - Unlimited daily production log, with each day's balance. - Every result with its formula and its source, so you can check the math. - Wire gauge in AWG or mm², automatic by your country. - CSV export, backup and restore. - No account, no connection needed. What Ohmio doesn't do It calculates capacity, consumption and sizing — it never gives step-by-step wiring instructions ("connect X to Y"), and it's never a substitute for a licensed electrician or certified installer. Premium, if you want more Premium adds four things: unlimited projects (free gives you one), a PDF report of your sizing, comparing your production between periods, and no ads. The yearly and monthly plans start with a 7-day free trial, and there's also a one-time payment that never renews — size it once, and premium is yours for good. Questions people ask Do I need an account? No. Everything you log stays on your phone, not on a server of ours. AWG or mm²? Automatic by your country, and you can change it in Settings. What about a second project, like a boat and a cabin? The first is free; Premium removes the limit. Where's the privacy policy? At https://ohmio.alekla.com/privacy/ The free version has ads: a banner on the Journal and Projects screens, and occasionally a full-screen ad after a second project or a third wire run or fuse. No ads on Home or anywhere inside Sizing.