ألواح شمسية قابلة للطي لمحطات الطاقة والتخييم

Small panels with 20 to 60 watts and USB outputs are enough to top up a smartphone, power bank or head torch during the day. For power stations, 100 to 400 watts are common. As a rough calculation: a 200 W panel might deliver 120 to 160 watts under good conditions, so roughly 0.6 to 1 kWh over a full summer's day – enough to noticeably recharge a mid-sized power station, but not to fill it in a few hours.

Portable panels only reach their rated output when perfectly aligned. Set them up as close to perpendicular to the sun as possible and re-angle them throughout the day – that often achieves more than a bigger panel lying flat on the grass.

Before you buy, check that the panel and power station match:

Look for the IP rating (e.g. IP65 or IP67), an ETFE surface and sturdy kickstands. The junction box is usually less protected than the cells – don't leave it exposed in the rain. When folded, the panels should be stored dry. A built-in USB output is handy, but only works reliably in sufficient sunshine.

A 100 W panel usually weighs just a few kilograms and fits in the boot when folded; 400 W panels are considerably larger and heavier. Think about how often you'll have to carry the panel. Small models with a USB output suit hiking and cycling trips, while larger panels for a power station suit camping by car or motorhome. A carry handle and a pouch for cables are more useful day to day than they sound. Also compare cable lengths: if the panel stands in the sun and the power station in the shade, a few metres of distance help.