Multi-Hardware DIY Builds • By Dr. Alistair Finch, G0EOD • Reviewed by Callum MacLeod, CEng MIET

The 6-Watt Offline Family Library & Local AI Server: Running Full Wikipedia, WikiMed & OS Maps Inside a Faraday Enclosure

How to deploy an air-gapped household knowledge intranet on 12V DC—combining a fanless Protectli Intel N100 micro-server, Samsung T7 Shield 2TB Vault, uConsole CM4 cyberdeck, and E-Ink field reader.

Executive Summary & Key Engineering Takeaways

Modern households outsource almost all practical memory to cloud search engines. If subsea fibre trunks, DNS roots, or local ISP exchanges fail during a prolonged grid crisis, smartphones become blank glass slabs within minutes. Here is how to run all 6.8 million articles of English Wikipedia, 60,000+ WikiMed clinical guides, iFixit repair manuals, UK Ordnance Survey contour maps, and a local Llama-3.1 AI assistant on just 6.2 Watts of 12V DC power.

  • A desktop PC and monitor draw 180W–300W; the fanless Protectli Vault Intel N100 micro-server (OGA-CMP-007) wires straight to 12V DC and idles at 6.2 Watts (~148Wh per 24 hours).
  • Kiwix-serve broadcasts compressed openZIM archives (.zim) over local Wi-Fi so any family phone, iPad, or laptop can browse Wikipedia and WikiMed in a normal browser with zero internet.
  • The Samsung T7 Shield 2TB rugged NVMe SSD (OGA-CMP-005) holds the complete Project Alexandria archive and fits inside a Faraday pouch when not mounted.
  • For outdoor repairs or week-long battery endurance, transfer wiring schematics and medical PDFs onto the ONYX BOOX 7" Carta 1200 E-Ink Reader (OGA-CMP-008), which draws 0W while displaying a static page.

1. Why Cloud-Dependent Smart Devices Fail First in a Blackout

Even if your home router still has battery power during a regional blackout, local street broadband cabinets (FTTC DSLAMs and FTTP optical nodes) typically exhaust their standby batteries in 2 to 4 hours. Worse, many modern apps refuse to open cached documents if their OAuth login server cannot be reached.

True digital resilience means every byte of your family’s medical, mechanical, cartographic, and educational reference library resides physically on solid-state flash memory inside your own building, served over a local 192.168.x.x Wi-Fi hotspot that requires zero upstream internet.

2. Inside the 2TB Project Alexandria Vault (Kiwix .ZIM + Ollama LLM + UK Maps)

Curating, downloading, and checksum-verifying hundreds of gigabytes of openZIM archives takes days. On the Samsung T7 Shield 2TB Rugged SSD (OGA-CMP-005), we organize a ready-to-mount directory structure containing Full English Wikipedia with images (~102 GB), MDWiki / WikiMed clinical encyclopaedia, iFixit illustrated teardown manuals, Project Gutenberg’s 70,000 classic books, StackExchange engineering archives, and Great Britain OpenStreetMap / OS terrain tiles.

Alongside the static encyclopaedias, the drive includes portable Ollama weights for quantised 8-billion-parameter Large Language Models (Llama 3.1 8B Q4_K_M and Qwen 2.5 Coder). Running on the Protectli N100’s 16GB DDR5 RAM, the local AI generates ~10 tokens per second completely air-gapped—helping you summarize symptoms, convert units, or write Python/Arduino sensor scripts offline.

  1. Wire the Protectli Vault N100 12V input (OGA-CMP-007) directly to a 5A blade-fused channel on your 12V Anderson Powerpole bus—never waste 25W running a 230V AC inverter just to power a 12V computer.
  2. Plug the Samsung T7 Shield 2TB SSD (OGA-CMP-005) into the Protectli USB 3.2 Gen2 port; systemd automatically mounts the drive and starts Kiwix-serve on port 8080 and the local map tile server on port 8081.
  3. Connect any household smartphone, tablet, or the ONYX BOOX E-Ink Reader (OGA-CMP-008) to the Protectli’s local Wi-Fi AP and bookmark http://192.168.10.1:8080.
  4. Keep the ClockworkPi uConsole CM4 (OGA-CMP-006) charged with spare 18650 cells as your portable metal-chassis Linux field terminal for CHIRP radio programming and SDR++ spectrum analysis.

3. Why E-Ink Beats Backlit LCD Tablets in Multi-Week Outages

An iPad or laptop LCD screen burns 6W to 15W continuously just to fight daylight with its LED backlight. When you are kneeling beside a consumer unit, tracing a 12V water pump fault, or reading a chapter of Where There Is No Doctor in the garden, the ONYX BOOX Page 7" E-Ink Reader (OGA-CMP-008) uses electrophoretic microcapsules that lock into position physically: once a wiring diagram is drawn on screen, battery draw drops to virtually zero.

4. Lightning Transients, CMEs & Faraday Storage Hygiene

Solid-state NVMe drives and E-Ink readers left unplugged inside a dual-layer Faraday enclosure survive nearby lightning induced surges, solar geomagnetic storms (CMEs), and mains grid switching spikes undamaged. Store your primary or backup 2TB vault disconnected inside a shielded case and only mount it when needed.

Paired UK Hardware & Companion Print Manuals

Frequently Asked Questions

Can multiple family phones and tablets browse Wikipedia on the Protectli server at the same time?

Yes. Kiwix-serve is an extraordinarily lightweight C++ HTTP daemon; the quad-core Intel N100 can serve simultaneous Wikipedia, WikiMed, and map pages to 20+ Wi-Fi devices while drawing under 8 Watts.

Does the Samsung T7 Shield 2TB drive work without the Protectli server?

Yes! You can plug the Samsung T7 Shield 2TB SSD directly into any Windows PC, MacBook, Linux laptop, or Android phone/tablet via USB-C and launch the included standalone Kiwix reader immediately.

How do I update the offline Wikipedia .ZIM files once a year?

Whenever you have normal home broadband, simply open the Kiwix library manager (or run our included update script) to download the latest annual openZIM snapshot from download.kiwix.org.