Which SunJack Solar Panel Is Right for You? (15W to 400W)
SunJack makes foldable ETFE solar panels that span a wide range of sizes, from a compact 15W charger you can clip to a backpack all the way up to a 400W panel built for serious off-grid power. With so many choices, picking the right one comes down to matching wattage to what you actually need to charge and how far you travel from an outlet. This guide walks through the full lineup so you can find your fit.
How Panel Wattage Works in the Real World
Wattage is the headline number, but it describes output under ideal conditions: direct, overhead sun with the panel angled correctly and kept cool. In the real world, output is usually lower because of clouds, heat, shading, and the angle of the sun through the day. A higher-wattage panel gives you more usable power and faster charging, plus more cushion on imperfect days. Keep that in mind as you read the ratings below.
The SunJack Panel Lineup
| Panel | Best For |
|---|---|
| 15W panel | Topping off a phone or earbuds on day hikes; ultralight kits |
| 25W panel | Faster phone charging and small USB devices; everyday carry |
| 40W panel | Tablets, multiple phones, and charging a power bank while you explore |
| 60W panel | Laptops, small power stations, weekend camping |
| 120W panel | Mid-size power stations, extended trips, faster recharges |
| 400W panel | Large power stations, RVs, base camp, running bigger loads |
Grab-and-Go: 15W and 25W
If your goal is simply keeping a phone or a couple of small USB gadgets alive, the 15W and 25W panels are perfect. They are light, fold down small, and clip onto a pack so they charge while you walk. The 25W gives you a bit more speed and is a great everyday choice.
The Versatile Middle: 40W and 60W
Step up to the 40W or 60W panel when you want to charge tablets, top off a laptop, or refill a power bank in a reasonable amount of time. Built-in kickstands help you angle the panel toward the sun, which meaningfully improves output. These are the sweet spot for most campers and overlanders.
Serious Power: 120W and 400W
When you are running a power station for several days or powering bigger loads, reach for the 120W or 400W panel. The 120W is a great all-around station charger, while the 400W is built for RVs, base camps, and refilling large batteries in a single sunny day.
How to Decide
- Charging only a phone? 15W or 25W.
- Phones, tablets, and a power bank? 40W or 60W.
- Laptops and a small power station? 60W or 120W.
- Large power station, RV, or base camp? 120W or 400W.
Ready to Choose?
Every SunJack panel uses durable, weather-resistant ETFE and folds flat for travel. When in doubt, size up a little so you have power to spare on cloudy days. Browse the full SunJack lineup and pick the panel that matches your next adventure. Keep in mind that real output varies with sun, angle, and temperature, so a panel with a bit of extra capacity is rarely a wasted choice.