Quick Test of Eco-Worthy MPPT Controller
Ordered it on 3 Oct arrived at the door 23 Oct free shipping. Controller rated to 42V so watch that. EG I have it on one 230w panel, Voc 37v at 25C, so would be more Voc at cold temps. Not ab...
Forum Discussion
ken white wrote:BFL13 wrote:
It is all about whether, at "normal" temps, the MPPT advantage over PWM is lost. Seems it could be, but my incomplete results are encouraging that it won't be entirely lost, leaving some sort of MPPT "gain" to justify the controller's higher cost.
I'll bet money the MPPT still outperforms the PWM as long as higher voltage panels are used...
Don't compare the MPPT to PWM with low voltage panels since it is not designed to have an advantage there...
I went from PWM to MPPT with initially parallel 12V panels. There still was an advantage, but yes, more advantage with series connected or high voltage panels.
And the post I did earlier trying to do a side by side mostly looking at the effects of long cords, but it verified MPPT still had an advantage. With short (<10ft) #8ish connection, PWM maxed at 9.5A while the MPPT was showing between 10.1 and 10.4A
Previous use showed the PWM pretty much maxed out at 9.5A. However, in good summer sun, the MPPT yields 12a series or parallel with short interconnect. But in parallel, a long cable run does loose the advantage.
so it comes down to how much the extra 2.5A (20%) is worth to you if you can use a series connection.
