Off-Grid Power & Water for RV & Van Life
Living on the road full-time -- or even spending long weekends boondocking -- demands reliable power and clean water independent of hookups. Your RV's house battery and onboard tank only go so far. This guide covers every category of off-grid equipment you need to stay self-sufficient, from solar panels and lithium batteries to water filtration and inverters, with links to our top-rated picks in each category.
Last updated: April 2026
What You Need for RV Off-Grid Living
A complete RV off-grid setup covers five equipment categories. Each card links to our best-for guides with product rankings, spec comparisons, and our top pick.
Portable Power Stations
Mid-to-high capacity units (1,000-4,000Wh) that handle fridges, CPAP machines, laptops, and small appliances while boondocking.
- ✓ 1,500-3,000Wh for weekenders
- ✓ 3,000Wh+ for full-timers
- ✓ LiFePO4 battery for daily cycling
Solar Panels
Rigid rooftop panels for permanent installs and portable foldable panels for ground deployment at camp.
- ✓ 200-400W rigid panels for roof mount
- ✓ 100-200W portable panels for flexibility
- ✓ MPPT charge controller required
Water Filtration
Gravity and inline filters for filling your RV tank from streams, campground spigots, and questionable water sources.
- ✓ Inline carbon filter for campground hookups
- ✓ Gravity filter for off-grid water sources
- ✓ UV purifier as backup for untreated water
Batteries & Charge Controllers
LiFePO4 house batteries and MPPT charge controllers for DIY solar-battery setups that integrate with your RV electrical system.
- ✓ 100-200Ah LiFePO4 for most RVs
- ✓ 200-400Ah for full-time boondocking
- ✓ MPPT controller sized to panel array
Inverters
Pure sine wave inverters and inverter-chargers that convert 12V/24V battery banks to household 120V AC for your RV appliances.
- ✓ 2,000W for typical RV loads
- ✓ 3,000W+ if running AC or microwave
- ✓ Inverter-charger combo for shore power integration
RV Power Needs Checklist
Calculate your daily watt-hour consumption to size your battery bank and solar array. These figures represent typical RV appliance draws.
| Appliance | Draw | Daily Est. |
|---|---|---|
| 12V fridge/freezer | 40-80W continuous | 960-1,920Wh |
| Laptop | 50-100W | 200-400Wh (4h use) |
| LED lights | 10-30W total | 60-180Wh (6h use) |
| Phone/tablet charging | 10-20W | 40-80Wh |
| CPAP machine | 30-60W | 240-480Wh (8h use) |
| Roof vent fan | 10-30W | 60-180Wh (6h use) |
| RV AC unit (small) | 1,200-1,800W | 4,800-7,200Wh (4h use) |
RV Water Needs Checklist
Know how much water you consume daily to plan tank capacity, refill schedules, and filtration throughput.
| Use | Estimated Volume |
|---|---|
| Drinking & cooking | 1-2 gal/person/day |
| Dish washing | 2-4 gal/day |
| Quick showers | 2-3 gal/shower |
| Total per person/day | 5-9 gal/person/day |
Solar Sizing for RVs
A rough rule of thumb: you need about 1 watt of solar for every 4-5Wh of daily consumption (assuming 4-5 peak sun hours). So a 2,000Wh daily draw calls for 400-500W of solar panels.
Weekender
- Daily use: 1,000-1,500Wh/day
- Solar: 200-300W
- Battery: 100Ah LiFePO4
Part-Time Boondocker
- Daily use: 2,000-3,000Wh/day
- Solar: 400-600W
- Battery: 200Ah LiFePO4
Full-Time Off-Grid
- Daily use: 3,000-5,000Wh/day
- Solar: 600-1,000W
- Battery: 400Ah+ LiFePO4