Hold on everyone. I am having trouble finding where I state the panel is bad. That was a question, that's all it was. A question.
I implicitly stated just three things.
1. My 200 watt, 12 volt Renogy panel is delivering 60% of rated, in direct sun, (that means no clouds), and other environmental's.
2. Electrolytic Capacitors fail and will never last 25 years, (none that are available on the market anyway).
3. MPPT Controllers fail and will never last 25 years because they contain electrolytic capacitors, (see #2).
What I did not say was "my panel is bad".
With that said, unless you are going to give me two, (one for a backup), MPPT controllers, I will never use one, so please hold the hard sell. I chose the SMBS0 and DSSR20's because they are simple, reliable and at the very least have a chance to last as long as my panels. My bet is that most panels will rarely deliver full capacity in real world use. Place the panel in direct and perpendicular blue sky full sun, I would expect more than 120 watts, regardless of how its is connected to the battery pack. I get the hows and whys of the MPPT but can you explain how an MPPT charger would have given me 200 Watts from my panel that was in near perfect conditions, (AS STATED ABOVE in my first post), as I was in? BTW, the power peaked from 1300-1500, probably due to the drier air of afternoon. I would have been happy with 180 or even 170 watts, but 120 watts is too low. If the DSSR20 is, as you say, a piece of wire, then I would expect a 12 volt panel to charge a 12 volt battery as well as the environmental conditions allow. Maybe we need to run through and read all our comments and try to better understand what we are saying.