Has been in use for over a month so far with no problems. It may look like black plastic in some photos, but it is black powder coated metal and feels very solid and well built. It is currently charging a 7.2Ah AGM batt with a 12W solar panel and has been doing a great job. Be aware that (according to the spec sheet) it uses around 8-10ma of current all the time, so this should be factored into your math if you plan on charging a small battery. Overall a very nice controller for small applications.

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