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.
Wiring Diagram:
Specifications:
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 | |||
Battery | 12V/10Ah |
