Suaoki via Amazon offers the Suaoki 100-watt Solar Panel Charger for $189.99 $179.99. Coupon code "YQM886CO" drops it to $159.99 $151.19. With free shipping, that's the lowest price we could find by $10, although we saw it for $20 less last month. It flexes up to 30° for RVs, boats, cabins, tents, or other irregular surfaces.