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Costway
July 11, 2026

RV Laundry Without a Laundromat: Costway Portable Washing Machine Guide

Can you really do laundry in an RV? What a portable washing machine needs from your power and water systems, and how the Costway 4.5kg compact washer fits camper life.

Laundry is the chore that drags full-timers back to town. A portable washing machine changes that math — if your rig can support one. Here's the honest breakdown of what RV laundry takes, and where the Costway 4.5kg compact portable washer fits.

What the Costway Actually Is

A fully automatic compact washer: set the program (6 wash programs, 3 water levels), and it fills, washes, drains, and spins on its own — this is not a hand-crank camping gadget. The honeycomb tub takes about 8 lbs of laundry (several days of clothes for two, or a set of bed sheets), it runs on a standard 120V plug, and the built-in drain pump means it empties uphill into a sink or gray connection instead of needing gravity. At apartment-washer performance in a camper-sized box, it's the practical sweet spot for RV use.

What Your Rig Needs to Support It

  • Power: on shore power, no issue. Off-grid, a washer's motor wants a real inverter — a 2000–3000VA unit like a Victron MultiPlus handles it comfortably; see our inverter sizing guide.
  • Water: a wash cycle uses roughly 10–15 gallons depending on level settings. On city water, trivial. On tanks, plan wash days around fill-ups.
  • Gray capacity: everything that goes in must drain out — check your gray tank headroom before starting a cycle.
  • Space: it's compact but real — most owners run it in the shower stall or external kitchen area, then stow it for travel.

Real-World Routine

The winning pattern we hear from customers: wash on hookup days or town stops (unlimited water/power), and line-dry — a ladder-mount drying rack costs nothing to run and RV parks' dryers are where quarters go to die. Off-grid washing works too on a solar-and-lithium rig; just run the cycle midday when the panels are carrying the load.

Is It Worth It?

If you travel more than a few weeks at a stretch: yes, emphatically. Laundromat runs cost half a day and $10–15 a load; the washer pays for itself in a season and — more importantly — removes the single biggest "we have to head back to town" trigger. Weekend campers can skip it.

The Costway 4.5kg portable washer ships from our Upland, CA warehouse — and if you're speccing the power system to run it off-grid, our team will size the inverter and battery bank for your whole appliance list, not just the washer.

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Costway
Updated: July 11, 2026