Tell us about yourself!
And I assume the arduino should be able to handle 13.5 Volts (which it seems this battery won't really get to.
Luckily though the panel has an in built diode, but I may try swapping that with the more efficient one you suggested.
The panel I'm looking at produces a max of 18V which is charging a 12V battery and this I imagine would be problematic. So I'd probably need some kind solar regulator or maybe find a way to get a read on the voltage between the battery's terminals and cut off the panel if its at 12V.https://www.amazon.ca/ALLPOWERS-Maintainer-Automob...
Scale of the project currently is about one or two bins of soil and gravel perhaps, with a reservoir the water would drip into. Not a full fledged green house. Mostly attempting to test if an autonomously powered and smart plant growing system would work. (ergo why the arduino is needed to gather data like moisture).Panels I'm thinking of are somewhere in the 5W range (around what is in those solar car battery chargers) I am a complete noob to solar so I don't quite have a feel for the scale. I'm looking to run something like a little 12V pump which is what I currently have. Its rated for 240L/hr (or 4L/minute) with a head of 3 meters
Variable ATX bench powersupply - FabLab edition