The most affordable Internet onboard

Is it possible to have internet almost anywhere, with good speed and without paying a fortune?
Yes, it is! In this article we show you how to get reliable and affordable internet on your boat, motorhome or second home — even many miles offshore — with a system you can build yourself for less than €35.

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🔧 What will you learn?

In this new episode of The Low Cost Sailor we show you how to:

• Install an IP67 outdoor 4G router for just €35, resistant to water, salt and sun.
• Configure it to reach up to 20 Mbps real speed at 18 miles offshore — tested on board a Salvamar rescue boat.
• Power it directly from the batteries of your boat, van or country house using PoE and a voltage converter.
• Connect using low-cost plans from just €2/month or unlimited data for less than €10/month.
• Optimize your onboard network with an indoor WiFi router, cameras, sensors and much more.

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💰 Purchase links

🛒 Recommended equipment:

• ✅ Router 4G IP67 (35 €)
  🔵 Buy on AliExpress
• ✅ Outdoor 5G Router (optional, high-end)
  🔵 Buy on AliExpress
• ✅ Voltage converter 12 V → 24 V
  🔵 Buy on AliExpress
• ✅ PoE injector
  🔵 Buy on AliExpress
• ✅ Connectors for the PoE injector
  🔵 Buy on AliExpress

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📶 Recommended data plans:

• ✅ Budget Simyo plan (8 GB for €2/month)
  🔵 Use referral code 06520QO3 or access directly here:
  https://www.simyo.es/amigos.html?codeMGM=06520QO3
  (Automatic reward valid until 26/08/2025!)
• ✅ Unlimited data for less than €10/month with Aló
  🔵 Sign up here

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📊 Installation and wiring diagrams

Here are the diagrams to help you install everything step by step — the first using the router’s internal WiFi, and the second adding a small router inside the boat:

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🧠 Did you know…?

Do you want to calculate how far your router antenna can reach, taking Earth’s curvature into account?
🔗 Use this online calculator: https://es.planetcalc.com/1198/