RV fixed wireless setup: the modems, antennas, and plans that actually work
A mobile rig that gets reliable internet across the country. Covers dual-SIM failover, omnidirectional antennas, and realistic expectations for different travel styles.
- Drill
- Cable routing tools
- 12V to 110V inverter (optional)
For full-timers and weekend warriors, the question isn’t “which carrier is best” — it’s “which carriers can I use simultaneously so I always have one that works.” A proper RV rig combines multiple connectivity paths.
The core setup
- Dual-carrier cellular: T-Mobile + Verizon (or T-Mobile + AT&T) via a dual-SIM modem like the Cradlepoint R2100 or Peplink gear. When one fails, the other picks up.
- Omnidirectional roof antenna: Poynting XPOL-2 is the go-to — you can’t re-aim every time you park, so omni beats directional for mobile use.
- Starlink Roam as a third path for locations where cellular is unusable (deep rural, national parks, remote boondocking).
Pick your travel style first
- Full-time on highways and near towns: T-Mobile Home Internet on a stationary address + Roam Unlimited as backup covers most scenarios. Cheapest reliable option.
- Boondocking / remote parks: Starlink Roam Unlimited is worth the $165/month. Cellular often doesn’t reach.
- Fast travel across many states: Cellular-first with dual-SIM, Starlink as backup. Cellular is faster when it works.
Power considerations
Cellular modems pull 15-30W, routers another 5-10W — easy on house batteries. Starlink Gen 3 pulls 50-75W continuously, which adds up overnight on battery. Many RVers only turn Starlink on when cellular fails.
Antenna mounting
Don’t mount antennas directly to the roof metal — you want a non-conductive lift (plastic or fiberglass mast). 4-6 inches off the roof is usually enough to clear reflections. The Poynting XPOL-2 comes with a marine-grade mast mount that works well.
