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Wrenches, In the past month we have encountered some assembly errors on preassembled E-Panels using the Magnum MS4448PAE and MS4024AE inverters. Robin Gudgel has become aware of the problems and has corrected them, but there may be other Wrenches who have installed or plan to install these E-Panels and may be able to correct the errors at installation. Robin has encouraged me to post this here. On all three E-Panels the same two problems were found. The first is that the four signal wires (two twisted pairs) connected to the Magnum ME-BMK sending unit for the remote display were loose enough to pull out. In one case this prevented state-of-charge data from being accessible on the display. The solution is simply to tighten the terminals, but as this is a preassembled connection, checking tightness could be overlooked. The second is that the white 14 awg DC - conductor from the preinstalled array GFDI is terminated at the white AC neutral bus. It should be connected to the DC - bus on the shunt. Moving this will require splicing in a few inches of #14 solid white THHN, as the existing conductor is too short, but has a resistor lead soldered to it, discouraging just replacing this wire with a longer piece. It's a funny thing - it's easy to overlook these errors because we expect the factory wiring to be correct. I missed these two errors, and so did an experienced installer from our Taos branch who crewed with me on one of the three installations. It took an inexperienced but very skilled apprentice on his first day of his first installation to discover both problems and bring them to my attention. I have worked with Eden, the apprentice, on other projects, so I trusted him to terminate correctly in the E-Panel. Turns out it was his fresh eyes that caught what we had overlooked because we hadn't expected it. Allan --
Allan Sindelar |
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