木有無限的空間。MPPT能提高 20-30%不少啊

i plan to add 4 x 300w panels and a 60-90a mppt controller.  midnite classic 150 is good except pricey @about $600, but it's with a proven quality and made in usa.  the only one on taobao made in china is enerpo, with 80a charging rate @￥2200, no record of good or bad.  i was hoping someone here knows it...