USB panels that charge a phone in the sun, and store nothing · review
A 28 W four-panel charger with SunPower Maxeon cells, a current checker and built-in stands, in ripstop nylon. Award-winning design, USB-A only, $129.99.
ELECOM’s NESTOUT series won an iF Design Gold Award, and the 28 W panel shows why: SunPower Maxeon cells, a ripstop nylon bag with pouches, two built-in adjustable stands and an LED current checker. It folds to about 30 × 20 × 5 cm and weighs 771 g.
Two USB-A ports, and no USB-C. That is the main practical gap against the BigBlue and Ecosonique panels, which offer USB-C at the same or lower prices. A USB-A to USB-C cable solves it, at standard 5 V charging rates.
No other USB charger on this shelf can stand at an angle by itself. On a beach or a campsite without anything to lean it against, that is worth something.
ELECOM-USA listed it at $129.99 on November 2, 2026, with a one-year warranty, the most expensive USB solar charger here.
Prices quoted in this text were read on November 2, 2026. The live price is at the top of the page.
| Rated power | 28 W |
|---|---|
| Cells | SunPower Maxeon |
| Outputs | 2 × USB-A, 5 V |
| Monitoring | LED current checker |
| Stands | 2 built-in adjustable stands |
| Material | Water-resistant ripstop nylon bag with pouches |
| Folded size | 30 × 20 × 5 cm (about 11.8 × 7.9 × 2 in) |
| Weight | 771 g (1.7 lb) |
| Award | iF Design Gold Award (NESTOUT series) |
| Warranty | 1 year |
| Amazon reference | B09TKD9KSJ |
No. It has two USB-A ports. A USB-A to USB-C cable charges a modern phone, at standard 5 V rates.
ELECOM says SunPower Maxeon cells give up to 24% more efficiency than traditional cells. SunPower has made solar panels since 1985.
Yes. Two built-in adjustable stands set the angle, without leaning it against a tent or a pack.
8.1/ 10
A beautifully made 28 W panel with Maxeon cells and stands. Its USB-A-only outputs and its price make it a design choice more than a value one.
Same category, nearby prices, between portable power units. What remains is the specifications every one publishes — half empty, a column is no use.
| Model | Price | Rated power | Cells | Weight |
|---|---|---|---|---|
| ELECOM NESTOUT 28 W solar panel | $130 | 28 W | SunPower Maxeon | 771 g (1.7 lb) |
| BigBlue 28 W solar charger | $80 | 28 W | N-type, 25.4%, shadow-free front with no metal lines | 1.5 lb |
| BigBlue 28 W solar charger with ammeter | $78 | 28 W | 25.4% efficiency, no front metal lines | 595 g (1.3 lb) |
| MARBERO 30 W solar panel charger | $60 | 30 W | 21.5–23.5% efficiency | 2.4 lb (1.3 kg in the spec table) |
Campers who want a well-made panel that stands on its own
Specifications: the manufacturer sheet for portable power gear and the matching Amazon product page. Prices and availability: Keepa. Every figure on this page names its source.
28 W foldable USB solar charger with a digital ammeter, 25.4% cells, USB-A 5 V/2.4 A and USB-C 3 A, PET fabric, IP44, 595 g (1.3 lb), no internal battery, 18-month warranty
A 28 W solar charger with a built-in ammeter that shows live output, 25.4% cells and an 18-month warranty, at 1.3 lb and $77.96.
Best for: Hikers who want to see whether the angle is right, and buyers who value the warranty
≈ $78
30 W tri-fold USB solar charger, ETFE laminate, 23.5% monocrystalline cells, USB-C and USB-A at 5 V/3 A each, IP67, 1.7 lb, 12-month warranty
A 30 W tri-fold ETFE solar charger rated IP67, the toughest here, with USB-C and USB-A, at 1.7 lb and $45.99, the cheapest USB charger on this shelf.
Best for: Rainy-climate hiking and budget emergency kits
≈ $46
30 W foldable solar charger with a DC output (16.5 V/1.81 A) for power stations, plus USB-C PD (up to 12 V/1.67 A) and QC3.0 USB-A (up to 12 V/2 A), 21.5–23.5% cells, IP65, 2.4 lb, 12-month warranty
A 30 W foldable charger with a DC output for small power stations as well as fast USB-C and QC3.0 ports, with published sun and cloud output, for $59.99.
Best for: Small power stations and phones on the same trip
≈ $60
