Hi John, Sounds like a nightmare. I'd call hogwash on tech support saying too small battery bank, it is small but shouldn't cause XW to ignore settings. I don't suspect the SCP, it is just a display not a brain.
A full list of programmed parameters is useful. - have you disconnected BTS and checked if behavior changed? - setting charger = off may stop this wild charging behaviour, force it to just sell surplus PV, but would need manual intervention to charge up from grid ie after an outage if this is setup for backup as well. I had something along this line some years ago, ignoring programming. Ended up doing a complete software delete and reload via XDT and complete total system reprogram and it started to behave properly. This is not the same as resetting to factory. Kevin From: RE-wrenches [mailto:[email protected]] On Behalf Of John Blittersdorf Sent: June-27-18 8:05 PM To: RE-wrenches <[email protected]> Subject: [RE-wrenches] Xantrex XW4548 Grid tie sell and charge wildly out of control Hello Group. I have a customer with an XW4548 grid tied with a Classic 200 CC, 16 Evergreen ES-A210's, 8 Interstate L16 Batteries, with generator backup. We have had issues with it not selling, selling and then charging at high rates way beyond the settings. This has been an ongoing problem for 6 years and currrently are 18 months into the 2nd battery pack and showing depleted battery life. Xantrex tech support says that the battery capacity is too small and we are not setting it up correctly. Before the first set of batteries had one battery explode, we had spent countless hours with their tech support trying to get this inverter to behave properly. Even when going through every setting with tech support, we never got it to work quite right. Setting to factory defaults did not work. Found that the default absorption time was 6 hours and the inverter battery charger was pushing up to 75 amps into this battery, then selling at about 40 to 60 amps DC and then immediately charging and then selling. I estimate this battery pack may have had thousands of massive charge and discharge cycles... good reason for the batteries to be weak now. After a few of these wild cycles, it would fault with DC overvoltage. It would eventually clear the fault and do this crazy cycle again. I programmed the inverter charger to the lowest setting of 10%, Lowered the battery capacity setting to 200 ah from 360, set the charge timer to not run during the hours we were there. None of these changes made any significant difference. We also set the maximum Sell amps AC down to 3 amps which should have kept it at about 720 watts but we were still seeing it sell up to 2500 watts. Before we reset that,, it was selling up to 4000 watts. Could it be a defective SCP. There is no internet there to allow us to see the past performance. Does anyone have a clue what is going on. I have worked with Outback Radians in this same configuration with no problems at all. I am about ready to rip it off the wall and replace it with a Radian. John Blittersdorf Rob Stubbins Electrical and Solar.
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