The processing of the device is neat enough. The plastic is nice, the screws and metal bits are fine. The included acorn nuts are plastic (probably nylon) which is good as the screws holding the transparent disc are under tension. The problem lies in the cumbersome overall design/implementation. The screws holding the transparent screen are under tension, which is understandable but a little awkward. The positive and negative outputs on opposite sides are understandable but make the thing unwieldy unless you have an unusual layout. the most annoying. As another reviewer mentioned, the metal parts inside are not sufficiently separated. For example, the negative bus is too close to the positive ends and there is no physical separation between them. Including backup contactors. Everyone is expected to behave well and not move. You could easily build some sort of physical disconnect device into the case itself, though. they just didn't. So overall it's a clumsy design/implementation. Not a bad idea, but I wouldn't use it in any of my projects.
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