⚡ Offline mode — all content available · AI features paused
Save for Offline Use
All lesson content, Tricks & Hacks, and No Free Energy physics are embedded in the app and work without any connection — including in emergencies and fully off-grid situations.
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Download as HTML File
Save the complete app as a single file to your device. Opens in any browser with zero connection required — works forever, even without the internet.
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Install as App (Add to Home Screen)
Install OffGridIO on your device for instant offline access. Works like a native app — no browser needed, no connection needed after install.
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Cache for Offline (Auto)
Already done. OffGridIO automatically caches itself on first visit. You can use it offline right now — just open the URL while connected once, then you are set.
Earth batteries to geothermal.
Rocket stoves to sand batteries.
Science-driven. No free lunch.

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Emergency Mode
Download your reference package now
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Designs & Blueprints
Complete build plans with materials
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Energy Advisor
Location-aware system recommendations
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No Free Energy
Physical limits of energy generation
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kWh Calculator
Size your system to your load
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Settings
Profile, preferences, sync
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No Free Energy
The physics, math, and hard limits governing all energy generation and conversion. Know these before you build anything.
← Dashboard
Energy Advisor
Location-aware recommendations across all generation methods.
Advisor
kWh Calc
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Settings

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Signed in account
Preferences
AI Hints in Lessons
Contextual guidance while learning
Data
Supabase Cloud Sync
Auto-backup your progress
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Reset All Progress
Clears all local data
🆘 Emergency Mode
Grid may be down. Download your energy reference package now before you lose connectivity or power.
⚡ Immediate Actions
Your Energy Triage Plan
📱 Keep Your Device Alive
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Device Survival Guide
Power conservation, charging sources, offline maps, and grid-down communication hierarchy.
📊 Your System Knowledge
← Emergency
📱 Keep Your Device Alive
Grid-down smartphone survival for off-grid and emergency situations.
Step 1
Immediately Enable Power Conservation
The moment the grid goes down, maximize battery life.
  • Airplane mode ON — then re-enable WiFi only. Cellular searching for signal is the top drain.
  • Screen brightness minimum — display is the #2 drain. 30% is readable outdoors in shade.
  • Low Power Mode / Battery Saver ON — reduces background processes and CPU clock automatically.
  • Screen timeout: 30 seconds
  • Disable GPS, Bluetooth, NFC unless actively using.
Full brightness + cellular on: 6–8 hrs battery life Airplane + min brightness + low power: 36–72 hrs Conservation multiplier: 4–9×
Step 2
Power Source Hierarchy
  • Your off-grid system first — if your solar/battery system is up, charge from it. USB from 12V system via a DC-DC converter or inverter.
  • Car USB — run engine 20 min/hour. A full tank = hundreds of phone charges. Most reliable grid-down source most people already have.
  • Portable battery bank — 20,000 mAh = 4–6 full charges. Recharge from car or solar panel daily.
  • 10W folding solar panel — charges phone in 2–4 hrs direct sun. Charges battery bank during day for night use.
  • Hand-crank charger — last resort. 1 min cranking ≈ 30 sec talk time.
  • 4× AA alkaline emergency charger — charges phone to ~20%. Keep 8 lithium AAs in your kit.
⚠️ Never drain your car battery below 50% capacity charging devices. You need it to start the engine — your primary charging source.
Step 3
Pre-Load Offline Maps Now
  • Google Maps offline — Menu → Offline Maps → Select Your Own Map. 30-day expiry, re-download regularly.
  • Maps.me — free, downloads entire countries, more rural detail than Google offline.
  • Gaia GPS / Avenza — topographic maps for backcountry. Download your region now.
  • This app — OffGridIO is already cached offline. All content works without connection.
💡 Do this NOW. Offline maps need 200MB–1GB of storage and require a connection to download. You cannot download them during the emergency.
Step 4
Grid-Down Communication Hierarchy
Priority order when grid fails: 1. SMS text (survives congested cell networks) 2. WiFi calling (if any WiFi AP is up) 3. Meshtastic / LoRa mesh radio 4. FRS/GMRS handheld radios (0.5–5 mile range) 5. Satellite messenger (inReach, SPOT, Zoleo) 6. Voice call — fails first on congested networks
Step 5
Physical Protection & EMP
  • Cold temps — lithium batteries lose capacity below 0°C. Keep phone inside your jacket.
  • Waterproof — zip-lock bag is IP67-equivalent for free.
  • EMP protection — metal trash can + tight lid + cardboard liner = functional Faraday cage. Store backup phone, battery bank, and solar charge controller inside.
  • Backup device — a wiped old smartphone with OffGridIO downloaded, kept in airplane mode in a Faraday bag, costs nothing and survives EMP.
💡 Best preparedness tech investment: $20 Faraday bag + old smartphone with OffGridIO, offline maps, and critical contacts saved locally. Zero subscriptions. Works after EMP. Works forever.

Designs & Blueprints

Complete build documents — materials, instructions, and print-ready plans.