Building a photovoltaic solar power energy system can be done in an affordable manner. I will show you my ideas and the systems that I will build and test myself while on a tight budget all while taking advantage of New Mexico's sun.
So I finally got my new eBay MPPT 15 solar charge controller going today and charging a battery. I did read some not very good reviews on these Chinese version of an MPPT controller and I am pretty sure those other reviews are right. I think my Chinese PWM controller works better than the MPPT 15 but I need to do some additional testing before I stick by that statement. It kept a close on the output voltage of the MPPt 15 controller today and saw that is slowly rose only up to 13.10 volts even though my panels were putting out 20 volts easily in direct sunlight. As I mentioned before I need to purchase some shunt resistors so I can accurately measure current outputs as well. Here are pictures of my simple MPPT 15 set-up. I have it attached to a small project box where I can connect fuses and an On-Off switch to the controller. I also am again using and IEC computer power input and my solar panel connector. Check it out:
I just received my newest solar panel this weekend from an eBay seller in Texas. This was a 60 watt panel that I got for a good price with free shipping. It arrived in great condition and is so far working great. This now brings my total panel power output to 120 watts. I need to permanently mount it with my other two panels to my stand so I can leave them outside. Here are some of my latest pictures of my panels.
New 60 watt solar panel next to two 30 watt solar panels