I have 2 COB LEDs (12-14V DC, 50W, I think with 3,75 A in data sheet). I need to run them with a solarpanel, it should only run when there is sunlight no batteries needed. So I figured out I could use a 270W panel (open circuit voltage around 38,8V, optimium volt+curr: 32V, 8,4A) with 2 parallel connected DC DC Step Down Buck Converters 8-40V 10or12A Constant, adjustable current+voltage to run them both seperately, but I am concerned because the maximum voltage of the solarpanel gets really close to the maximium the Buck Converters can handle. Or I could use just one LED with a 130 W Solarpanel (open circ. volt 22,8V, opt. volt+curr: 17,6V 7,4A) with a 7-32V DC DC step down buck Converter 8-10A also constant adjustable curr+volt. But here I am concerned that the input voltage may get too low for the Converter (because just 38% of the current of the max. output is needed and because the voltages of the solarpanel get even lower when the temperature gets over the 25°C Standard-conditions.) so that there is a bad efficiency when there is no perfect sunlight shining.
Or are my concerns unfounded
Please help…
Or are my concerns unfounded
Please help…