I need a small solar charge controller for a 4.2V battery and a 5V solar panel. In my research, I found the SD05CRMA and the SDBK03TA 4V2.
Both use a 472 and a 1201 resistor. They both also use a CN3163 mppt lithium ion battery charge controller.
I see no other differences besides price.
Are there any benefits of one over the other in terms of physical architecture?
I looked around and the only real difference I could find is the temperature range but you'd have to be in some rather extreme environments for that to make a difference. When things are that close I tend to favor which vendor is going to stand by their product.
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