The TruPower portable solar power systems come in 150W and 350W models and are designed to be compact, durable, and easy to use portable power sources for outdoor activities. They use solar panels, inverters, batteries, and charging circuits to efficiently charge electronic devices like phones, cameras, tablets, and laptops from solar power or wall outlets. The systems can provide multiple charges to smartphones, fewer charges to tablets, and a charge or two for laptops per charge depending on the wattage of the model.