PWM or MPPT.

[GQtdauto]

I have a 200 watt panel on the camper trailer and have a PWM regulator on it , a couple of weeks ago I noticed that when the clouds blocked out the sun I was registering 14.1 volts , later that day a tree was shading the panel and it was at 14.2 volts and I'm more than happy with that .
MPPT claim that they are 20 odd percent more efficient than PWM but I read recently that it might be true in a lab but in the real world they are not as good as they claim , still a bit better than PWM but not that much .
Much like solar panels are rated in labs and in the real world they don't get near claimed wattage .
For my money it's more important to have as much solar as possible than MPPT regulator and less watts but that's me , I will have to find the research I was looking at but have no idea where I came across it .
What I like about my system is I'm in the middle of fixing another 100 watt to the roof rack which will join up to a 40 watt panel up front giving me 140 watt on the GQ , but I'm wiring it up so I can put all solar from camper and GQ into one or the other regulators to give 340 watt of solar .
If need be later I can add another 200 watt panel to front half of camper trailer but will have to replace one of the regulators if I do .