Best Portable Solar System for Running a CPAP (Camping and Travel)
CPAP machine without humidifier (30W for 8 hours), LED reading light (10W for 2 hours), and phone charging (15W for 2 hours). Approximately 290Wh per day.
Quick Answer
The EcoFlow River 2 (256Wh) with a 110W solar panel is the optimal all-in-one CPAP solution. It runs a 30W CPAP for 8 hours on a single charge and recharges fully in about 3 hours of direct sun. The total package weighs under 15 pounds. For a DIY build, a 100W panel, 50Ah LiFePO4, and a 12V CPAP adapter eliminates the inverter entirely — running CPAP directly at 12V for maximum efficiency and minimum weight. The plug-and-play solution is the EcoFlow River 2 + 110W Solar Panel ($378), which delivers 256Wh of storage and 300W of AC output with solar recharge built in.
System Specification
Sized for 290Wh/day at 12V.
| Component | Specification |
|---|---|
| Daily Energy Use | 290 Wh/day |
| Solar Panel Array | 100W |
| Battery Capacity | 725Wh (60Ah at 12V) |
| Charge Controller | 10A MPPT |
| Inverter | 500W Pure Sine Wave |
| System Voltage | 12V DC |
Option 1: EcoFlow All-in-One Bundle (Easiest Setup)
EcoFlow River 2 + 110W Solar Panel
Ultra-portable 256Wh station with 110W panel. Runs phones, CPAP, and lights. Recharges in 3 hours of sun.
- Capacity: 256Wh
- AC Output: 300W continuous
- Price: $378
No wiring required. Plug the solar panel into the station and plug appliances into the AC outlets.
Option 2: DIY Mid-Range Build (Best Long-Term Value)
Higher upfront cost than a bundled station but significantly more capacity and expandability. Best for permanent installations.
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Option 3: DIY Budget Build (Lowest Upfront Cost)
The lowest-cost path to solar power. AGM batteries cost more to operate long-term due to shorter cycle life, but work well for occasional or seasonal use.
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Why This System Works
The EcoFlow River 2 (256Wh) with a 110W solar panel is the optimal all-in-one CPAP solution. It runs a 30W CPAP for 8 hours on a single charge and recharges fully in about 3 hours of direct sun. The total package weighs under 15 pounds. For a DIY build, a 100W panel, 50Ah LiFePO4, and a 12V CPAP adapter eliminates the inverter entirely — running CPAP directly at 12V for maximum efficiency and minimum weight.
Frequently Asked Questions
Will the River 2 run my CPAP all night without solar?
Yes, for one night. At 30W (CPAP without humidifier), the River 2's 256Wh capacity lasts 8.5 hours — enough for a full night. With the humidifier on high (60–80W), runtime drops to 3–4 hours. For humidifier use overnight, the River 2 Pro (768Wh) is required. The River 2 with a 110W solar panel recharges in about 3 hours of direct sun, making it self-sustaining over a multiday camping trip as long as you have decent sun each day.
Can I get a prescription for a CPAP battery for insurance coverage?
Some insurance plans cover backup power for CPAP machines as medical equipment. Document your medical necessity through your sleep doctor or prescribing physician. Request a prescription for a 'portable backup power supply for CPAP.' Medicare Advantage and some private plans reimburse $150–400 toward a qualifying battery pack. The EcoFlow River 2 qualifies as a UL-listed power station compatible with CPAP use. Contact your CPAP equipment supplier — many have experience navigating these claims.
What is the lightest CPAP solar setup for backpacking?
The lightest viable setup: Anker 727 Power Bank (100Wh, 1.5 lbs) plus a Goal Zero Nomad 20 foldable panel (20W, 1 lb). Total weight: 2.5 lbs. The 100Wh battery runs a ResMed AirMini (8W) for 12+ hours. The 20W panel recharges the power bank in about 5 hours. This is viable only for the AirMini or other ultra-low-power CPAP models. For a standard CPAP above 30W, the EcoFlow River 2 at 7.7 lbs with a 100W foldable panel (3.5 lbs) gives you 11 lbs total — still manageable for car camping and basecamp use.
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