Powerstations, i.e. battery energy storage devices with various USB, and socket outputs, are very popular, but also expensive. The EBL MP500 costs just under 500 euros, offers a continuous power of 500 W (1,000 W peak) and can store 519.4 Wh of energy in its batteries. Of course, you can charge the one-handed portable energy cube with both mains and solar power. EBL includes a 100 W folding panel for the latter.