Quick answer: For genuine dry camping — no shore power, no generator hookup, just you and whatever you brought — most RVers and van campers need a power station in the 1,500–2,500Wh range with at least 2,000W continuous output to comfortably run a fridge, water pump, lights, and device charging, paired with solar panels for anything beyond a weekend. Smaller units work for tent-based dry camping with lighter loads. Full breakdown below.
Dry camping (also called boondocking) means exactly what it sounds like: no electrical hookup, no water hookup, nothing but what you bring with you. That makes your power setup the actual limiting factor on how long you can comfortably stay somewhere — not fuel, not food, but battery capacity and how fast you can recharge it.
Here’s how to size a portable power station for real dry camping, not just an occasional weekend where you’re topping up at a hookup every couple of nights.
Why Dry Camping Power Needs Are Different
There’s No Backup Plan Mid-Trip
At a hookup site, running low on power is an inconvenience — you’re plugged into shore power anyway. Dry camping, a power station that runs out mid-trip means your fridge stops, your water pump stops, and depending on your setup, your lights and communication gear go with it. Sizing correctly matters more here than for any other camping scenario.
Everything Runs Off the Same Battery, All the Time
At a hookup site, you might only pull from a power station for specific things — charging devices, running something the site’s outlet can’t handle. Dry camping, the power station (or house battery system it’s paired with) is often carrying the full load: fridge, water pump, lights, fans, device charging, communication gear, all day, every day, for the length of the trip.
Recharging Depends Entirely on What You Brought
No shore power means your only recharge options are solar, engine/alternator charging while driving, or a generator (which many dry camping sites — BLM land, national forest dispersed sites — restrict by hours or ban outright). This makes recharge capability, not just battery capacity, one of the most important specs for genuine dry camping.
What Actually Draws Power During Dry Camping
| Load | Typical Power Draw | Notes |
|---|---|---|
| 12V compressor fridge | 40–60W (cycling) | Runs continuously, cycling on/off — biggest steady daily draw |
| Water pump | 50–100W | Only draws while actively running |
| LED lighting | 5–20W per fixture | Low draw, easy to run for hours |
| Starlink or satellite internet | 40–75W | Continuous while active |
| Laptop charging | 60–100W | Intermittent |
| Phone charging | 5–20W | Minimal |
| Fan | 5–40W | Depends on size/speed |
| CPAP machine | 30–60W average | Runs overnight, continuous |
| Microwave or electric cooking | 800–2,200W | Occasional but a major spike when used |
Add up your realistic daily total, then multiply by how many hours each thing runs, to get a rough watt-hour target. A fridge running most of the day plus lights, water pump, device charging, and Starlink commonly lands somewhere around 800–1,500Wh of actual daily consumption for a modest setup — before factoring in any cooking.
Sizing a Power Station for Dry Camping
Weekend Dry Camping, Tent or Minimal Rig (1–3 nights)
A power station in the 500–1,000Wh range with roughly 1,000–1,500W continuous output covers lights, device charging, a small fridge, and modest water pump use for a short stay, especially if you’re not relying on it as your sole power source for something like a CPAP machine every night.
Standard RV or Van Dry Camping (3–7 nights)
This is where most boondockers land: a power station in the 1,500–2,500Wh range with 2,000W-plus continuous output. This comfortably covers a fridge running continuously, water pump, lighting, device charging, Starlink, and a fan, with enough headroom that one cloudy day of poor solar recharging doesn’t put you in a bind.
Extended Off-Grid Stays or Full-Time Boondocking (a week or more)
At this point, capacity alone stops being the answer — recharge rate matters as much as battery size. Look for a unit with high-wattage solar input (400W or more) and, ideally, the ability to expand capacity with add-on battery packs. Full-time boondockers are essentially running a daily energy budget: whatever solar brings in each day needs to roughly match what gets used, rather than trying to store enough up front to last the whole trip.
Solar: The Feature That Actually Matters Most Here
For a weekend trip, solar is a nice-to-have. For genuine dry camping stretching beyond a few days, it’s the difference between a trip that works and one that ends early because you drove back into cell range looking for an outlet.
A few things worth checking specifically:
- Rated solar input wattage, not just «solar compatible.» A unit that accepts up to 800W of solar input recharges dramatically faster than one capped at 200W, especially relevant during shorter winter daylight hours or partly cloudy conditions.
- MPPT charge controller, standard on most current units, which squeezes more usable power out of your panels than older charging methods, especially in less-than-ideal sun angles.
- Realistic panel expectations. Rated wattage on a solar panel is a best-case, direct-sun number — real-world output is commonly 60–80% of that rating depending on angle, cloud cover, and panel cleanliness. Don’t plan your trip length around the panel’s rated maximum.
Generator-Restricted and Quiet Campsites
Many popular dispersed and BLM boondocking sites either restrict generator hours or discourage them entirely as a courtesy to neighboring campers — and a growing number of campers avoid gas generators by choice, since a battery power station typically runs at a small fraction of a generator’s noise level and produces zero exhaust. If you’re camping somewhere with generator restrictions (common on public land) or simply don’t want to be «that campsite» at 6 a.m., a properly sized power station with solar is functionally your only quiet, fume-free option for genuine off-grid power.
What Dry Camping Power Stations Generally Can’t Do
Being upfront about the limits avoids disappointment: most portable power stations, even larger ones, aren’t sized to run rooftop RV air conditioning for extended periods — that typically requires either a much larger, RV-integrated battery and inverter system, or accepting limited AC runtime. If climate control is a priority for extended dry camping in hot climates, this is worth researching specifically before assuming a standard portable power station will cover it.
Frequently Asked Questions
How long can a power station last while dry camping?
It depends entirely on your daily consumption versus your recharge rate. Without solar, a 2,000Wh unit running roughly 1,000Wh of daily loads (fridge, lights, water pump, charging) lasts about two days before needing a recharge. With adequate solar input matching your daily usage, that same setup can sustain indefinitely, limited by weather rather than stored capacity.
Can a portable power station run an RV fridge during dry camping?
If it’s a 12V compressor fridge (increasingly standard on newer rigs), yes — these draw relatively little power and are one of the easiest loads for a power station to handle continuously. A residential-style AC compressor fridge draws significantly more and needs a correspondingly larger power station.
Is solar necessary for dry camping, or can I just bring a big enough battery?
For short trips (a few days), a sufficiently large battery alone can work. For anything longer, solar becomes close to essential — no reasonably portable battery holds enough capacity to sustain a week-plus of continuous use without recharging, but a well-matched solar setup can.
How many watts of solar do I need for dry camping?
As a rough starting point, aim for solar input capable of replacing your typical daily consumption within 5–6 hours of usable daylight. For a setup using around 1,000Wh per day, that generally means 200–400W of solar panels in decent conditions, though cloud cover and panel angle both reduce real-world output below the rated number.
The Bottom Line
Dry camping puts real demands on a power station that hookup camping never tests: the battery carries the full daily load, there’s no fallback if it runs low, and recharging depends entirely on what you brought. For most RV and van dry camping, that means a 1,500–2,500Wh unit with 2,000W-plus output and genuine solar recharging capability — sized not just for the battery you’re carrying, but for the daily energy budget solar can realistically sustain once you’re actually out there.