Oh No ! I bought a Mppt Solar Controller
I don't believe it ! I bought it and I don't really even want it ! I was sure this would go for more than 12 bucks. Fooled me, oh well. Whats w/ links not working ?
Forum Discussion
Well I will still be interested in seeing how it does. Why, well because there are times when a PWM controller would have a advantage over a MPPT controller even with with my high volt panels. When it's cloudy early on and the battery is low, the MPPT controller will go into bulk. When it is cloudy the panels voltage drops and the controllers ability to use MPPT will drop to 1.78 for my 230w poly. I noticed this in testing last year and figured I was SOL if we had a cloudy week.
When we were camping it was cloudy every afternoon, yet since the controller was in float/PWM, I was getting 4-8a depending on the cloud cover and our loads. (even 5a in the rain)
It seems the lower voltage has the ability to push the PWM fine but not the MPPT function. For $13 I can have a usable solution to a cloudy week. Actually in full sunlight I was getting 13-14a in PWM anyways, I really wouldn't need MPPT at all.
When we were camping it was cloudy every afternoon, yet since the controller was in float/PWM, I was getting 4-8a depending on the cloud cover and our loads. (even 5a in the rain)
It seems the lower voltage has the ability to push the PWM fine but not the MPPT function. For $13 I can have a usable solution to a cloudy week. Actually in full sunlight I was getting 13-14a in PWM anyways, I really wouldn't need MPPT at all.
