A while back I set up a project for temperature monitoring in a remote warehouse. It was powered by 2x 18650 rechargeable batteries thru a small solar panel(3W). It worked, more or less, but at times it powered down due to lack of sun. Alas I decided to take the project down but not before adding a second identical solar panel to the power part of the setup (bms module, battery holder and solar panel). I figured I would just use it to recharge my batteries for any project.
Then I remembered I have a large 250W panel sitting in that same warehouse. It's a 17V/14A panel left over from my grid tied setup.
So I'm wondering what would I need in order to use that panel and make a few different taps to have a 5V charger for devices, a 6-9V charger for my 18650 batteries and maybe a few Leds for basic lighting?
Then I remembered I have a large 250W panel sitting in that same warehouse. It's a 17V/14A panel left over from my grid tied setup.
So I'm wondering what would I need in order to use that panel and make a few different taps to have a 5V charger for devices, a 6-9V charger for my 18650 batteries and maybe a few Leds for basic lighting?