Electrical Engineering Stack Exchange is a question and answer site for electronics and electrical engineering professionals, students, and enthusiasts. It only takes a minute to sign up. Connect and share knowledge within a single location that is structured and easy to search. To a buck-boost converter that convert an input voltage in the range 1V-6V to a voltage of 5V?
Who would "win" the fight to set the voltage? The buck-boost converter can work with any input voltage and the solar panel can work at different output voltage. I can't figure a way to calculate the input impedance of the buck-boost converter.
Bellow is the representative circuit diagram for a solar panel on the left and the buck-boost converter on the right with the converter switch represented with the letter S. The internal switch control will determine if it works as buck or as boost obviously, if the solar voltage is lower than 5V it is a boost, if it is higher it is a buck.
Depending on the size of the load, the solar input voltage may drop. If the voltage gets too low for the boost to handle, the output voltage will also drop.
Solar panels shouldn't be excessive loaded, because their efficiency drops in that case. In essence they lower their output power to not overly load the solar panel. So I have actually tried is with a cheap normal buck boost with constant voltage and constant current fuction. I have a 12v volt system so I set the the output to have In bright sunlight with the baterry charging, it pulled the solar panel down to 8 volts minimum operating voltage of the BB converter while outputting at My understanding is that the panels can't provide the converter with enough power so it keeps drawing more current so the voltage drops.
I have a Ebay cheap PWN, this is a dc-dc converter. I also have a a buck. Now the difference between the two should be known. The Load R is dependent on the panel and power W of the two. Should you consider installing these instead of regular solar panels? Find out how it benefits homeowners installing solar.
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