Bonzo wrote:The diode is to prevent the charger "charging" the solar panel if there is a problem. It is also the wrong way around - the band is on the direction of current flow.
I have a greenhouse monitor which is similar: viewtopic.php?f=11&t=19458 I have a LDO Linier regulator between the solar panel and charger. But it was my first project and I should have gone for a higher voltage output panel but I did not realise the panels went above 5V so put it in as a safety. Of course it does not work when the panel is only putting out 5v! I was going to buy a higher voltage panel but might be able to wok around it with a Mofset. I intend on revamping it this year when I get a home soldering setup.
what problem you have with that project? what solar panel are you using there?
isn't 5V enough to charge a 18650? I have bought 2x 88x142 panels, they should output 2W each.
I bought this panels,
https://www.amazon.it/gp/product/B07ZNZ ... UTF8&psc=1
they have an USB connector so the voltage regulation should be done by that black box.
isn't this a good solution for the charging problem?