I initially purchased the solar Saga 200 Watt as part of a starter kit to provide emergency power back up during a grid outage. Over the past week I have used the solar panels to charge a Jackery Explorer 2000 plus and extension battery that were used to back off the hotel load on my home, a 3 bed cottage in south west England. I have to say that I am well impressed. With the sun in a cloudless sky from 10:00 to 17:30 BST over the past 5 days the panels constantly produced between 185 and 230 Watts output. It is worth adjusting the angle and direction to maximise output, but this is only necessary 2 or 3 times throughout the day. I intend to purchase another three of these panels for the future. With a single 200 Watt folding array its takes around 4.5 hrs to charge the battery from 40% to full charge. The sun is not particularly strong at the moment but with summer approaching then the output should increase greatly.