Good Day,

It has been a minute since any further update status regarding repairing venerable Luxpower LXP hybrid inverter(s). There were initially two non-functional units, but nr. 1 of the 2 were “technically” repaired, if the RSD jumper counts as a repair.

While repairs on unit nr. 2 started out relatively well, I cannot for the life of me locate suitable replacement gate drive transformers in the EE13 package. I am having difficulties just acquiring EE13 ferrites and bobbins to begin with. Unless my logic is severely flawed, i.e., an attempt to rewind a matching set of GDTs of sufficient mh, which appears to be proprietary parts to begin with: the manufacturer and part number(s) do not cross reference to any replacement whatsoever.

At this point, for the sake of time, I am more than willing to purchase a replacement 3 level DC board from the Luxpower manufacturer or sales; and now a replacement LCD/CAPACITIVE touchscreen display, which broke when the unit slipped…[sighs] The screen driver board is still ok but is a replacement screen even available as a stand-alone part, without the driver board assembly?

…what a cluster f…

Unit nr. 1 is still powered up and producing power, it hasn’t been placed under significant load yet. It is more or less ready to be permanently installed. I did not see a practical need for an additional mcb panel, so a simple modification to unit nr. 1 was made: three strategically placed holes and 1 standoff was relocated by about 12mm for necessary clearance and the ground bus temporarily removed… The enclosure is more than cavernous as it is, and it just seemed practical if not convenient: just a piece of din rail and 4) 2pole DC breakers; the ground bar will be relocated later. Initially I did not want to turn the MCBs upside down, but the additional amount of time and energy to maintain an upright position, didn’t seem worthwhile; all existing PV wires had just enough slack to comfortably terminate to the MCBs. Being magnetic trip?, line and load must be oriented correctly. There are other options that I might explore at a later time that is not orientation specific but I am ok with the end results: If this configuration might be problematic, please let me know your thoughts on it.

As for unit nr. 2 I have not conceded defeat; even if tech support leaves something to be desired: no response yet. If anyone knows where new or used parts can be sourced for these units, I am more than interested… TBD for now… thanks.

The idea, in the case of an emergency, other than MCB protection indoors and outdoors is to wire the RSD shutdown in series preferably or via a plc, in a number of practical but discreet locations. One can never be too careful…

_Loch

Hello What is the model number of the unit you have I can ask the members on the Luxpower support group where you can get the complete boards for repair.

Hi,

My apologies; unit 2, model nr: LXP-LB-US12K

Thank you

_Loch

Edited June 11Jun 11 by Loch