Callsun 110W N-Type Solar Panel

The Callsun 110W stands out less for its output, fairly ordinary in the category, than for its cell technology. It uses monocrystalline N-Type with sixteen busbars, a more recent architecture than the PERC fitted to the vast majority of portable panels. Two differences matter in real use: performance drops less quickly as the cell heats up, which happens systematically in full summer sun, and annual degradation is lower over the panel's life.

The sixteen busbars, those thin metal lines that collect current across the cell surface, shorten the distance electrons must travel before being captured. More busbars means fewer resistive losses, and therefore better efficiency for the same area. That is what lets Callsun quote 25 %, against under 18 % for a classic PERC cell.

The concrete consequence is power-to-weight. At 3.64 kilos for 110 watts, this panel is markedly lighter than the average 100 watt on the market, which often exceeds 4.5 kilos. Folded it measures 62 by 58 centimetres and 4 thick, a large satchel format that slides behind a seat or into a boot without taking over the space.

The IP67 rating deserves a mention because it is rare in this segment. Most foldables settle for a vague claim of splash resistance with no official value. IP67 means complete dust tightness and tolerance of temporary immersion. Combined with the ETFE coating, more resistant to UV and abrasion than the PET used on budget models, that allows you to leave it set up outdoors without constantly watching the weather.

On connections, the supplied five-in-one universal cable covers XT60, Anderson and DC 5521 and 7909 plugs, which settles compatibility with almost every power station on the market. Two USB ports, one USB-A 3.0 and one USB-C, additionally let you power a phone or a tablet directly without an intermediate station. The two adjustable kickstands deploy without tools and let you aim the panel at the sun, which makes a large difference to output outside the middle of the day.