Hi Jon,
I have zero experience with the LG RESU 10H hi voltage battery. I assume resu10H is what you mean and not resu10? That said I did alot of testing with Schneider and LG for their attempt to make a 48V resu10 NMC offgrid system in 2017. Schneider had to derate XW+ to less than it's full output to try and make LG Chem happy. In the end the project ended and not much was said by either party. My input only is that Solaredge is probably trying to protect the battery from the pump surge. There is a heartbeat signal that the BMS needs from inverter to keep the battery on. (major bad design for offgrid, my opinion.) No one does this now as it is all internal to the battery. Even closed loop systems do not use this heavy handed design approach. Much better ways these days to do this reliably. The hi voltage you see, is it possible it is the unloading of the inverter after a surge? I guess it would be hard to reverse the load panels to test? Will think about this later some more. Good Luck! Dave Angelini Offgrid Solar "we go where powerlines don't" http://members.sti.net/offgridsolar/ [1] e-mail offgridso...@sti.net [2] text 209 813 0060 On Mon, 8 Jun 2020 10:14:46 -0500, Jon Siegenthaler wrote: Hey Wrenchers, This is an installation with two Solaredge Storedge 7.6 inverters and the LG Chem Resu 10 batteries. When the utility goes down the two inverters for the solar switch over to back up mode and feed two separate dedicated loads panels. One panel works fine and all of the dedicated loads connected to it work as normal. Within the other panel there are just two loads, some lights and some sump pumps that are connected to a controller. Before the pumps will operate the controller that monitors their operation also monitors the utility voltage so that the pumps don't see too high or low of voltage from the utility (or back up power). In normal utility mode the controller works fine. However when the system switches to backup mode the controller trips off. The voltage window for the pump controller is relatively narrow, however I'm not sure if that is the problem. The pump(s) will surge to a maximum of 20A at 240V for about a second and then hold between 7A-14A respectively. Which is within the operating window of the inverter (6600w surge 25A max continuous). I connected the controller load to my Eguage and logged the controllers usage both while connected to the utility and while connected to the battery back up. The data while connected to the utility is pretty typical with no irregularities. However when I switch to the battery side my logging disappears (measuring second by second and the results only show minutes). I believe that this is due to the inverter shutting down momentarily and then the Eguage needs to reboot. In all of the starting and stopping of the inverter I do see that the voltage spikes to L1-149V and L2-150V together with 299V L1"> Has anyone else encountered this problem before or something similar that may be able to offer some advice? I had an issue once before and added a 50mf capacitor to the line to smooth out the surge but this was for my home experiment and not a professional installation. Any luck with power line conditioners? Thanks in advance, Jon Siegenthaler Links: ------ [1] http://members.sti.net/offgridsolar/ [2] mailto:offgridso...@sti.net
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