> My two cents > > Some of the AC side problems On xantrax, schieder, ... systems I have come > across were resolved after finding the right combination of firmware > updates and/or full PCB swaps. If the SCP is relatively new compared to the > inverter then they may not be "talking" the same xanbus language which > could lead to "funny" translations of settings. I had a Conext 5548 that > would not take programming commands from a combox in a grid sell situation. > > There were some trace inverters that had serious ac board failures, and > even now I have found some Conext / Schieder 4024 inverters that decided to > see the input from a 120/240v generator as 110/208v input, which then > shutdown the system. In the end it was a firmware update that fixed the > issue. > > J Troxell > > > ---------- Forwarded message ---------- > From: John Blittersdorf <john.blittersd...@gmail.com> > To: RE-wrenches <re-wrenches@lists.re-wrenches.org> > Cc: > Bcc: > Date: Wed, 27 Jun 2018 23:04:37 -0400 > 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. > > > > ---------- Forwarded message ---------- > From: Kevin Pegg <kp...@energyalternatives.ca> > To: RE-wrenches <re-wrenches@lists.re-wrenches.org> > Cc: > Bcc: > Date: Thu, 28 Jun 2018 04:01:23 +0000 > Subject: Re: [RE-wrenches] Xantrex XW4548 Grid tie sell and charge wildly > out of control > > 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 > > > >
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