Since the disadvantage of traditional MPPT algorithms of variable step-size. proposed power tracking based on variable step-size with the advantage method of the constant-voltage and the perturb-observe (P&O)[1-3]. The control strategy modify the problem of voltage fluctuation caused by perturb-observe method. at the same time. https://www.chiggate.com/majirel-majicontrast-red-rouge-for-sale/