I have 2-10 amp and 3-20 amp these charge controllers, they are the best charge controllers I have bought in the last 10 years, they are small, compact and one hundred percent waterproof I love how the electronics are sealed in a silicone based material similar to what was used to seal electronics for car parts in the 1980's. Years. I also like the fact that these charge controllers are waterproof and can withstand both high and low temperatures. It is very easy to install these charge controllers without programming.
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