Also consider that the engineer is calling out xw+6848 which does have firmware support that stopped on the old graybox xw6048. Make sure you at least have the latest firmware in your 6048s' and that it is all the same. It is on the schneider site under discontinued products. Good Luck with this!
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 Wed, 22 Apr 2020 09:18:26 -0400, Jason Szumlanski wrote: Interesting. I am going to look into that. We are manually stopping the generator (the BMS kills the two-wire start signal). I don't think the AC2 transfer time matters much in terms of solving the clients complaints, but I will play with that also. Thanks! On Wed, Apr 22, 2020 at 8:18 AM Tump wrote: KISS.... have you checked the low voltage setting on AC2? Make sure that is is not set to the default settings. AC Transfer time? I set to the lowest time, I believe its 1. You also have 4 inverters what IS the charge setting of these units? "Gen assist" enabled? Info from Schneider engineer below; The AGS will cause XW+ to disconnect the generator when a stop signal is sent (Auto Stop) for the generator cool down period (user adjustable-AGS>Advanced Settings>Cfg Gen). If you are just manually stopping the generator, then it is possible for the XW+ to stay connected all the way down to 80V unless you increase that low AC value in XW+>Advanced Settings>AC Settings menu. _AC2 TRANSFER TIME MAY ALSO BE ADJUSTED (DEFAULT IS 40S) USING COMBOX, GATEWAY OR CONFIG TOOL. THIS IS THE TIME IT TAKES TO SWITCH FROM GEN TO INVERTING. _ Hope that helps, Eric On Apr 21, 2020, at 4:27 PM, Jason Szumlanski wrote: The issue is during switching only. During inverter operation everything is silky smooth. During generator operation things are mostly smooth, but large loads that come on or off during heavy charging can cause some surging, but that is more a function of a junky generator (which was just replaced with a better unit). So the natural conclusion by the client is let's just run on battery/inverter all the time. And it does make sense. And it's his money. (239) 410-4985 On Tue, Apr 21, 2020 at 2:29 PM Ray wrote: Are you sure its just the transfer switching causing problems? I've seen quite a bit of lights dimming, flickering, and strangeness with XW inverters ( and many others) just in normal operation. Certain LEDs are particularly sensitive, just another appliance coming on can cause noticeable flicker that bothers some clients. Our solution was to try different brands of LEDs till we found ones that had less trouble. I recall the Phillips ones being good, but you would have to test a few to see. Ray Walters Remote Solar 303 505-8760 On 4/21/20 12:26 PM, Jason Szumlanski wrote: I have not looked into that, but the problem also exists transferring from inverter to generator. The owner wants "clean" power all the time, and just keeping him on inverter power all the time would be a solution. On Tue, Apr 21, 2020 at 9:35 AM Tump wrote: Have you shortened the transfer time from gen to inv, voltage "cut out"acceptance of the gen in power instead of their 90Vac to say 110V/L ? Raising the output voltage on the 6848s border-left:#1010ff 2px solid; margin-left:5px; width:100%"> On Apr 21, 2020, at 8:27 AM, Jason Szumlanski wrote: I actually need 400Adc at 51V nominal of total charge rate. I was hoping to use 100Adc chargers for redundancy, or some combination of 2-8 chargers to reach the needed current, assuming they can be synced up. I don't think the charging algorithm needs to be complicated. We are basically bulk charging the LiPOs to 80% with the battery BMS controlling the generator. The concept is to get to 80% sometime in the night and solar kicks in during the day to reach 100% using 2-stage charging from the XW charge controllers. The problem I have is the quad XW6048s in the system run at a pretty good load typically... often over 50%. This is off-grid with generator backup. The transfer switches in the XW6048 are causing surges and brownouts when the switched loads are high, especially smart dimmers and televisions. I need seamless power for this client. My thought is to abandon the internal chargers in the XW6048s and just run loads off inverter power full-time. I would charge the batteries with external battery chargers. The tricky part is how to adjust the charge rate based on load, and also based on solar input. I need to limit the net charging current. Of course, I still need 400Adc of charging current, which I'm learning might be hard to find. I don't really want to buy four more XWs - that's a pretty expensive solution. Jason Szumlanski Florida Solar Design Group On Fri, Apr 17, 2020 at 4:26 PM Dave Angelini Offgrid Solar wrote: I use the CSW 4048. It has a 50 amp charger. A good spare for clients. Get 2 of them. Repurpose an old Radian or XW well over 100A. XW+ is 140adc. DAVE ANGELINI OFFGRID SOLAR "we go where powerlines don't" http://members.sti.net/offgridsolar/ [15] e-mail offgridso...@sti.net [16] text 209 813 0060 On Fri, 17 Apr 2020 14:21:14 -0400, Jason Szumlanski wrote: I'm looking for a standalone 51V nominal battery charger suitable for a LiPO battery with 2-stage charging and adjustable setpoints for max current and battery voltage. It would require dual chargers with 100A capacity (I want dual chargers for redundancy so I have at least 50% capacity if one goes bad). Ideally they would sync up so they change stages simultaneously, but I'm not sure if that's really important. Who makes something like that? 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