It was already last year that I started planning a simple solar power system for the greenhouse, since the next power outlet is a tad bit away. After much back and forth, I finally dug up enough time and nerves to complete it by the end of may.
The plan was to create enough electricity and storage capacity to power a computer fan (for at least basic air and humidity exchange) and a small LED-Light. In the long run, I hope I can set up one of those timer-controlled solar irrigation systems (which will have to wait until I have installed a proper water reservoir close to the greenhouse). I even added an empty 220V socket should I ever run a decent cable back there.
It works very well so far, though I doubt the repurposed motorcycle battery I used will be powerful enough to power all three appliances when there’s no sun for a few days. We’ll see. Now that the days get hotter I have the impression that at least the fan is doing a good and reasonable job. See the details below.
|Solar Panel||Charger Module|
|Rated Power||30Wp||Rated Voltage||12V/24V|
|Max. Power Voltage||18,0V||Rated Current||30A|
|Max. Power Current||1,67A||Max. PV Voltage||50A|
|Open Circuit Voltage||21V||Max. PV Input Power||390W(12V) / 780W(24V)|
|Short Curcuit Current||2,0A|
|Max. System Voltage||600V|