Powerbank with solar cells - Get power on the go in nature

If you need power on the go, a solar power bank can be a simple way to keep your devices running when you're away from electrical outlets. In this article, you'll get a clear overview of what a solar power bank is, how it typically works in practice, and what you should look for so you can choose a solution that suits your needs in an active outdoor setup.

A solar power bank is basically a battery with one or more solar panels that can convert light into energy and store it in the power bank. It can still be charged normally via cable, but the solar panels provide an extra option to top up when you're out and about and want to be less dependent on the grid.

Solar charging is especially relevant when you are without stable access to power for a long time, or when you want extra security against low battery on your phone, GPS, headlamp or other equipment. At the same time, it is worth having realistic expectations: solar panels on compact power banks typically provide a slower charge than a wall charger, and efficiency is affected by lighting conditions, angle and shadow.

The solar panel produces DC power, which is used by internal electronics to charge the battery cells in the power bank. Devices are then connected via USB outputs, which provide stable power for charging.

In practice, many people choose to charge the power bank quickly with a cable before departure, while using the solar panel as a supplement along the way. This can be a good strategy because you start with a known capacity and can continually top up as conditions allow.

When evaluating a solar power bank, there are three areas that often make the biggest difference in use.

Capacity is typically measured in mAh, and higher numbers usually mean more charges, but also more weight. Also look at the output, for example whether it has USB-C and whether it supports relevant charging standards for your devices.

The power of the solar panel is often stated in watts. Higher watts can provide better charging in good lighting conditions, but physical size and placement also matter a lot. For some, a foldable solar charger provides better performance than a small panel on the power bank itself.

If it is going to be used in the wild, it may be relevant to look for some form of water and dust protection as well as built-in protection against overheating and short circuits. It is not about promising “indestructibility”, but about reducing the risk of failure in demanding environments.

A solar power bank is practical as an all-in-one solution, while a dedicated solar charger can be powerful if you want to prioritize higher panel output and flexible setup.

For example, if you want a foldable solution with a focus on harvesting solar energy for USB charging, a solar charger like the BigBlue 28 W Solar Charger may be relevant to consider in a lightweight and mobile setup where you can optimally position the panels.

Placement is often the most important thing: avoid shadows, and try to point the panel towards the light rather than just laying it flat. Also, keep an eye on energy usage by charging your most important devices first and using airplane mode or power saving when it makes sense.

When you pack light, it’s all about the big picture: power, gear, and comfort. A quick-drying towel like the Adventure Smart Towel can be a great addition because it typically dries quickly after use and can be washed less, which can save water over time. It’s a small thing, but in a minimalist outdoor setup, small, practical choices can add more value to your trip.