Looking for a 40 amp MPPT solar charge controller

Salvo said,

"When using mppt, temperature is a killer . You didn't account for it."

Actually, I did, indirectly, when I said,

"In hot conditions, as Vmp goes down, pwm efficiency would go up in comparison; and vice-versa."

The efficiencies on the chart are at conditions (25*C) favouring the mppt, of course. But the fact remains, there are conditions that favour mppt, and conditions that favour pwm. I plan to exploit both.