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Unless you are going to pay a reasonable amount of money MPPT will be meaningless. There's plenty out there where the only MPPT thing about the regulator are the letters printed on the case, & others which have poor quality & under developed MPPT algorithms. I am firmly of the belief that unless you are going to spend $200-$300 + then you are better off getting a PWM regulator as you will likely get a better quality unit. All bar the ultra cheapies will be using PWM, including those with MPPT.
2006 4.2TDi ex-Telstra Remote area Camper. Patrol Sold after 11 years of ownership Replaced with 2006 OKA NT Expedition Truck. Cummins, Allison & lots of goodies A Nomadic Life (Blog)