HQRP 30W (15W + 15W) Flexible Solar Panel 30 Watt Power 12V Monocrystalline PV Module 12 Volt DC Ba

These units give you close to the rated output and are light and easy to carry around.

I cant speak to the longevity as Ive only been using mine for about 3 months.

For camping or other portable power sources these fit the bill over the heavier aluminum framed panels.