How to choose, size, and get the most from portable solar — plus our top panel and power station combo picks.
Affiliate Disclosure: Some links on this page are Amazon affiliate links. We earn a small commission at no extra cost to you. We never recommend products based on commission rates — only on merit. Learn more.
Your use case determines how much wattage you need and what features matter most.
Weekend trips without hookups. You need power for lights, phone charging, a portable speaker. Portability and weight are top priorities.
40–100W recommendedFull-time or extended travel where you run a 12V fridge, laptop, lighting, and occasionally a fan. A 200–400W portable array supplements or replaces shore power.
200–400W recommendedGrid outages from storms or wildfires. Keep phones charged, run a CPAP machine, power a medical device, or keep the fridge cold for 24–48 hours.
200–500W recommendedCharging house batteries on sailboats, pontoons, or fishing boats. Marine environments demand IP-rated connectors and corrosion-resistant frames.
100–200W recommendedSeasonal or permanent cabins without grid connection. A 400W+ array paired with a large power station can cover most basic loads year-round.
400W+ recommended4WD expeditions and hunt camps where you need to charge cameras, GPS devices, satellite communicators, and a fridge off-grid for days.
100–200W recommendedFour steps to figure out exactly how much panel and battery capacity you need.
Find the wattage of each device you plan to run. Note how many hours per day you'll actually use it. Use the reference table below as a starting point.
Multiply each device's watts by hours of use, then add them all up. Example: a 50W laptop for 4 hours = 200 Wh. Add 27 Wh for phone charging and you're at 227 Wh/day.
Peak sun hours typically 4–6 hours/day in most of the US. Divide your daily Wh by peak sun hours to get your minimum panel wattage. 227 Wh / 5 hours = 45.4W. Divide again by 0.8 for real-world losses: 45.4 / 0.8 = 57W minimum.
Multiply your minimum panel size by 1.25. For the power station, aim for 1.5–2x your daily Wh so you have a cloudy-day buffer. Our calculator below does all this math automatically.
| Device | Watts | Hours/Day | Daily Wh |
|---|---|---|---|
| Laptop | 45–65W | 4 hrs | 180–260 Wh |
| Phone charging | 18W | 1.5 hrs | 27 Wh |
| LED lights | 10W | 5 hrs | 50 Wh |
| Mini fridge | 40–80W | 8 hrs | 320–640 Wh |
| CPAP machine | 30–60W | 8 hrs | 240–480 Wh |
| Small TV | 30–50W | 3 hrs | 90–150 Wh |
| Drone charging | 60–100W | 1 hr | 60–100 Wh |
Check the devices you use daily and we'll recommend the right panel and power station size.
Check each device you plan to use daily:
Assumes 5 peak sun hours/day, 80% system efficiency, 25% safety margin, and 1.5x battery buffer for cloudy days.
The most popular portable solar combo — a 1,002Wh power station that charges to 80% in under an hour with the included 200W panel.
A 2,000Wh LFP battery paired with a 200W ETFE panel. The LFP chemistry means 3,500 charge cycles — more than 9 years of daily use.
A highly portable 505Wh station paired with a compact 100W panel. Includes app for monitoring state of charge and usage.
EcoFlow's X-Stream technology charges the 1,024Wh DELTA 2 from empty to full in about 1 hour via AC. The bifacial 220W panel pulls more power in bright conditions.
Flat panels lose up to 30% output compared to panels angled perpendicular to sunlight. Face them south and tilt at roughly your latitude in degrees. Adjust throughout the day if possible.
Dust and grime on the panel surface can cut output by 5–15%. Wipe with a damp cloth periodically. On MC4 and Anderson connectors, a tiny amount of dielectric grease prevents corrosion.
Lithium batteries degrade faster when stored hot. A power station left in a parked car in summer sun can reach 140F+ inside — that's actively damaging. Store in shade or inside a vehicle cabin.
If storing for more than a few weeks, leave at 50–80% charge. Storing at 100% creates electrochemical stress; storing at 0% risks over-discharge that can brick the battery.
Panels still produce power on overcast days — typically 10–25% of rated output. Design your system with a battery buffer for at least 1–2 cloudy days.
Time your largest power draws — laptop charging, drone charging, cooking — to the middle of the day when your panels are producing most. This minimizes battery draw and extends battery lifespan.
Use our free savings calculator to see what a rooftop solar system could save you over 25 years.
💰 Open the Savings Calculator